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The zebra mussel (Dreissena polymorpha) has all traits required to effectively colonize the aquatic environment and consequently reduce the diversity of native bivalves. We hypothesized that the zebra mussel chooses lake outlets characterized by medium current velocity and good food conditions. Here, we analyzed differences between bivalve abundances in lake outlets with varying environmental conditions such as the Carlson Index (trophy status), depth, width, current velocity, bed vegetation coverage, and type of bottom substrate. The results showed that the zebra mussel inhabits outlets that provide food (high trophy outlets) and have a mineral bed and a medium current velocity (ca. 0.2–0.3 m/s). The following main factors seem to be favorable for colonizing such outlets: (1) easy access to high amounts of food due to the increased density of the suspension drifting from the lake and (2) easy transport of the zebra mussel larvae from the lake to the downstream. The zebra mussel larvae drifting with the current may colonize the downstream. An increase in lake trophy may indirectly cause an increase in biological invasions in rivers., Zebra mussel is worldwide invasive species which ecology in the river–lake ecotone is unknown. Dreissenids were more numerous in the outlets from highly eutrophicated lakes, and the mineral bottom and high water current velocity support the colonization. Lake pollution may positively affect the zebra mussel colonization in rivers.

The wild yak Bos mutus was believed to be regionally extinct in Nepal for decades until our team documented two individuals from Upper Humla, north‐western Nepal, in 2014. The International Union for Conservation of Nature (IUCN) seeks further evidence for the conclusive confirmation of that sighting. We conducted line transects and opportunistic sign surveys in the potential wild yak habitats of Humla, Dolpa, and Mustang districts between 2015 and 2017 and collected genetic samples (present and historic) of wild and domestic yaks Bos grunniens. We also sighted another wild yak in Upper Humla in 2015. Phylogenetic and haplotype network analyses based on mitochondrial D‐loop sequences (~450 bp) revealed that wild yaks in Humla share the haplotype with wild yaks from the north‐western region of the Qinghai‐Tibetan Plateau in China. While hybridization with domestic yaks is a major long‐term threat, illegal hunting for meat and trophy put the very small populations of wild yaks in Nepal at risk. Our study indicates that the unprotected habitat of Upper Humla is the last refuge for wild yaks in Nepal. We recommend wild yak conservation efforts in the country to focus on Upper Humla by (i) assigning a formal status of protected area to the region, (ii) raising awareness in the local communities for wild yak conservation, and (iii) providing support for adaptation of herding practice and pastureland use to ensure the viability of the population., Our study carries a global relevance as it presents phylogenetic and haplotype network analyses of wild and domestic yak samples to reveal that the wild yaks in Humla, Nepal, share the haplotype with wild yaks from the north‐western region of the Qinghai‐Tibetan Plateau in China, providing validation to the wild yak rediscovery in Nepal that was based on morphology and behavior of the sighted animals. We also derive phylogeographical inference for the wild yaks in the Nepalese Transhimalayas and discuss their hybridization status while also outlining the conservation implications for the wild yaks that are critically endangered in the country.

Ethical concerns are at the heart of the ongoing debate on trophy hunting; however, so far, most studies have addressed the issue from a single ethical perspective. These studies, approaching the subject from different ethical perspectives, have reached different conclusions. For instance, those who support trophy hunting as a conservation strategy usually adopt a utilitarian perspective, while those who adopt a deontological perspective usually oppose it. The analysis presented in this paper challenges the ethical justification of trophy hunting based on a utilitarian perspective, and it also suggests that trophy hunting is problematic from the perspectives of both deontology and virtue theory. This paper supports a version of Bryan Norton's ‘convergence hypothesis’ (Norton, 1991). Although holism and anthropocentrism in environmental ethics are usually presented as fundamentally opposed views, Norton argued that their conclusions for policy converge, at least when a sufficiently broad and long‐range view of human interests are considered. Analogously, this paper proposes that, regarding trophy hunting, the implications of three major traditional perspectives in ethics (i.e. utilitarianism, deontology and virtue theory) may converge in opposition to the practice of trophy hunting. The final section of this paper recommends some ways authorities and policymakers can address these ethical concerns and presents a view of the future. A free Plain Language Summary can be found within the Supporting Information of this article.

Ferox trout are large, long-lived, piscivorous trout normally found in deep lakes; they are highly prized by trophy anglers. Lough Corrib and Lough Mask, Western Ireland, have recorded the majority of Irish specimen ferox trout since angling records began. Little was known regarding the spawning location of ferox trout relative to sympatric brown trout, and a radio telemetry study was initiated in both catchments in 2005. Over the period 2005-2009, 79 ferox were captured by angling and radio tagged in Lough Corrib, while 55 ferox were tagged in Lough Mask. Manual and helicopter tracking were carried out on all spawning streams entering both lakes over the autumn/winter period to detect tagged fish. Overall, 37 radio-tagged trout (46.8%) were detected in Lough Corrib streams and 21 tagged trout (38.2%) were recorded from Lough Mask streams. Results from radio tracking indicate that the majority (92%) of ferox trout tagged in Lough Corrib spawned in a single spawning stream, the Cong river, while the majority (76%) of ferox trout tagged in Lough Mask spawned in the Cong canal and Cong river. These results suggest that these streams are most likely the principle spawning locations of ferox trout in both lakes. The occurrence of ferox trout predominantly in single spawning rivers in both catchments highlights the vulnerability of the study ferox populations. As a result of these findings, conservation measures were introduced for ferox trout in both catchments.

In November 1928, Theodore Jr. and Kermit Roosevelt led an expedition to China with the expressed purpose of being the first Westerners to kill the giant panda (Ailuropoda melanoleuca). The expedition lasted 8 months and resulted in the brothers shooting a giant panda in the mountains of Sichuan Province. Given the concurrent attention in the popular press describing this celebrated expedition, the giant panda was poised to be trophy hunted much like other large mammals around the world. Today, however, the killing of giant pandas, even for the generation of conservation revenue, is unthinkable for reasons related to the species itself and the context, in time and space, in which the species was popularized in the West. We found that the giant panda's status as a conservation symbol, exceptional charisma and gentle disposition, rarity, value as a nonconsumptive ecotourism attraction, and endemism are integral to the explanation of why the species is not trophy hunted. We compared these intrinsic and extrinsic characteristics with 20 of the most common trophy-hunted mammals to determine whether the principles applying to giant pandas are generalizable to other species. Although certain characteristics of the 20 trophy-hunted mammals aligned with the giant panda, many did not. Charisma, economic value, and endemism, in particular, were comparatively unique to the giant panda. Our analysis suggests that, at present, exceptional characteristics may be necessary for certain mammals to be excepted from trophy hunting. However, because discourse relating to the role of trophy hunting in supporting conservation outcomes is dynamic in both science and society, we suspect these valuations will also change in future.Article impact statement: Giant panda's symbolism, gentle nature, endemism, rarity, and value as an ecotourism target make trophy hunting the species unthinkable. Características que Hacen que la Caza de Trofeos de Pandas sea Inconcebible Resumen En noviembre de 1928, Theodore Jr. y Kermit Roosevelt lideraron una expedición a China con el propósito explícito de ser los primeros occidentales en cazar un panda gigante (Ailuropoda melanoleuca). La expedición duró ocho meses y terminó con los hermanos disparándole a un panda gigante en las montañas de la provincia de Sichuan. Dada la atención simultánea en la prensa popular que describía esta expedición celebrada, se posicionó al panda gigante como un nuevo objetivo de la caza de trofeos como muchos otros mamíferos alrededor del mundo. Sin embargo, hoy en día, la caza de pandas gigantes, incluso para la generación de ingresos para la conservación, es impensable debido a razones relacionadas con la misma especie y el contexto de tiempo y espacio en el que se popularizó a la especie en Occidente. Descubrimos que el estado del panda gigante como símbolo de conservación, su excepcional carisma y temperamento gentil, rareza, valor como atracción ecoturística no consuntiva y su endemismo son integrales para explicar por qué la especie no se caza como trofeo. Comparamos estas características intrínsecas y extrínsecas con 20 de los mamíferos más comunes en la caza deportiva para determinar si los principios que aplican para los pandas gigantes pueden generalizarse para otras especies. Mientras que ciertas características de los 20 mamíferos se alinearon con las del panda gigante, muchas no lo hicieron. El carisma, el valor económico y el endemismo, en particular, fueron comparativamente únicos para el panda gigante. Nuestro análisis sugiere que, actualmente, las características excepcionales pueden ser necesarias para que ciertos mamíferos no sean objeto de la caza deportiva. Sin embargo, ya que el discurso relacionado con el papel de la caza deportiva en el apoyo a los resultados de conservación es dinámico tanto en la ciencia como en la sociedad, sospechamos que estas valoraciones también cambiarán en el futuro.1928 年 11 月, 小西奥多·罗斯福和柯密特·罗斯福带领探险队到达中国, 他们的目的是成为第一批成功猎杀大熊猫 (Ailuropoda melanoleuca) 的西方人。这次探险持续了 8 个月, 最终两兄弟在四川省山区射杀了一只大熊猫。考虑到公众媒体对这次著名探险的大量报道, 大熊猫很可能会像世界上其它大型哺乳动物那样成为战利品狩猎的对象。而今天, 由于大熊猫物种本身及其在西方国家得到宣传普及的时空范围, 即便是为了获得保护收益而捕杀大熊猫也让人难以想象。我们发现, 大熊猫作为物种保护象征的地位、非凡的魅力及温和的性情、稀有性、作为非消耗性生态旅游资源的价值以及地方特有性, 是解释这个物种为什么没有受到战利品狩猎的必要因素。我们将大熊猫这些内在和外在的特征与 20 种战利品狩猎中最常见的哺乳动物的特征进行了比较, 分析了适用于大熊猫的原则是否能推广到其它物种身上。结果表明, 虽然受到战利品狩猎的 20 种哺乳动物的某些特征与大熊猫一致, 但有许多并不相同。特别是魅力、经济价值和地方特有性这几个因素, 均为大熊猫相对独特的特征。我们的分析表明, 目前, 某些哺乳动物若要免受战利品狩猎, 可能需要具备特殊的特征。不过, 由于在科学和社会方面对于战利品狩猎在保护成效中的作用的讨论仍在不断进行, 我们认为以上评估在未来也可能发生改变。 【翻译: 胡怡思; 审校: 聂永刚】.

1. People hunt and kill animals for sport in many parts of the world. This raises many issues, some of which were brought to the fore when a lion Panthera leo, nicknamed Cecil, was killed by a trophy hunter in Zimbabwe in 2015. Cecil's death led to an unprecedented public reaction in Europe and the USA, and a debate in which opponents and supporters of sport hunting advanced different types of argument based on, inter alia, conservation, animal welfare and economics. 2. The reaction to the Cecil event provides a perspective for scrutinizing sport hunting more widely. In this article we explore parallels between lion trophy hunting in Africa (which can involve either wild or captive‐bred lions) and shooting of common pheasant Phasianus colchicus, a sport which is largely sustained in the UK by the annual release of over 40 million captive‐bred birds. 3. These two forms of sport hunting share common themes that are likely to be influential for the future of sport hunting more widely. These include the extent to which sport hunting maintains land for wildlife, and the impacts of intensification (e.g. the extent to which quarry are reared and released). Concern for the welfare of quarry animals is a dominant theme in debates about hunting. 4. These themes are likely to be relevant for the conservation of many species hunted for sport. Increasing distaste for the killing of animals for sport in many countries may lead to the end of some types of sport hunting, with implications for both habitat and wildlife conservation. It would be both prudent and appropriate for conservationists to increase the urgency with which they seek alternative methods for preventing loss of biodiverse land to other uses.

Over the past decade, trophy hunting in Africa has seen increased public and scientific interest. Much of that attention has come from outside of Africa, with little emphasis on local views. We circulated an online survey through international networks to explore demographic and regional differences in opinion regards support for African trophy hunting, trophy import bans, and outside funding of conservation estates supported by hunting. We received ∼5700 responses and found that location, demography, and conservation background influenced opinion. African and North American respondents showed (significantly) more support for trophy hunting than respondents from Europe or other areas, as did respondents with conservation backgrounds. Unlike North Americans, Africans supported external subsidies of wildlife areas presently funded by hunting. Many factors affected opinions on African hunting, but respondent location played a major role. Realistic policy on African trophy hunting should thus integrate African perspectives, in particular those of rural communities.

Environmental conditions during early development, from conception to sexual maturity, can have lasting consequences on fitness components. Although adult life span often accounts for much of the variation in fitness in long-lived animals, we know little about how early environment affects adult life span in the wild, and even less about whether these effects differ between the sexes. Using data collected over 45 years from wild bighorn sheep (Ovis canadensis), we investigated the effects of early environment on adult mortality in both sexes, distinguishing between natural and anthropogenic sources of mortality. We used the average body mass of yearlings (at about 15 months of age) as a yearly index of environmental quality. We first examined sex differences in natural mortality responses to early environment by censoring harvested males in the year they were shot. We then investigated sex differences in the effects of early environment on overall mortality (natural and hunting mortality combined). Finally, we used path analysis to separate the direct influence of early environment from indirect influences, mediated by age at first reproduction, adult mass and horn length. As early environmental conditions improved, natural adult mortality decreased in both sexes, although for males the effect was not statistically supported. Sex differences in the effects of early environment on adult mortality were detected only when natural and hunting mortality were pooled. Males that experienced favourable early environment had longer horns as adults and died earlier because of trophy hunting, which does not mimic natural mortality. Females that experienced favourable early environment started to reproduce earlier and early primiparity was associated with reduced mortality, suggesting a silver-spoon effect. Our results show that early conditions affect males and females differently because of trophy hunting. These findings highlight the importance of considering natural and anthropogenic environmental factors across different life stages to understand sex differences in mortality.

Media coverage of trophy hunting highlights the potential for misinformation to enter public and political debates on conservation issues. We argue that misinformation should be a major concern for all involved in conservation.

The use of trophy hunting as a wildlife management option has been a highly controversial topic, especially in southern Africa, but trophy hunting has historically also taken place also throughout Asia. In China, trophy hunting was the topic of intense public discussion more than a decade ago, leading ultimately to the suspension of this practice in 2006. Yet, this debate was dominated by urban voices, with no formal consultation of rural populations from minorities such as the Tibetan herders who previously benefited financially from commercial trophy hunting acting as guides and who are also concerned about the negative impact of rising blue sheep numbers on livestock grazing. We used a discrete choice experiment econometric method to better understand the trade‐offs made by both urban and rural populations across China in relation trophy hunting as a rural development and wildlife management tool. We find that trophy hunting is supported by the majority of rural residents but opposed by most urban residents, although there is heterogeneity within both these groups. We recommend that policy‐making in this realm should be informed by a better understanding of the preferences of different stakeholders, including the local people who bear the costs of living with wildlife.

Objective In this article, I test for evidence of own‐race bias in voting for the Heisman Trophy. Methods To study own‐race bias in Heisman Trophy voting, I use individual vote data from Heisman voters from 2002 to 2012 and an ordered probit model with controls for player and team performance that flexibly allows votes be affected by a player's race and racial match between player and voter. Results Estimates show nonblack voters are more likely to vote for nonblack players in absolute terms and compared with black voters assuming homogeneous voter preferences. Allowing preferences to vary by race, results show nonblack voters continue to be more likely to vote for nonblack players in absolute terms and are strongly suggestive of a larger relative bias in favor of nonblack players by nonblack voters as compared with black voters. Conclusion There is a racial component to Heisman Trophy voting and bias is large enough to affect official aggregate results. Racial bias may have affected the award's winner in multiple Heisman races between 2002 and 2012.

Interest in managing Alligator Gar Atractosteus spatula populations as a unique sport fishery has increased over the past decade, but despite this interest, population responses to harvest are poorly understood. Fishing regulations for Alligator Gar vary throughout their distribution; however, to date most regulations have focused on a daily creel limit. We developed an age-structured dynamic-pool model in R to, (1) quantify population level effects of exploitation, and (2) evaluate how these effects were altered under a suite of length-based fishing regulations. The model was parameterized based primarily on empirically estimated dynamic rates for Texas Alligator Gar populations. For each model scenario, we calculated the mean and variance of the number of trophy fish in the population, the population size, Spawning Potential Ratio (SPR), and the fishery yield over a 100-year chronology. Alligator Gar populations were highly sensitive to exploitation in our model simulations. An exploitation rate...

Horns, antlers, and other horn-like structures are products of sexual selection, confer reproductive advantages, and are heritable and honest indicators of individual quality. In addition to serving key biological functions, horns and antlers garner societal interest that, when combined with the powerful motivation to acquire trophy animals, likely has spawned a growing hornographic culture fixated on males with exceptional horn-like structures. The concern that harvest of large, fast-growing males may cause evolutionary change to the very trait being sought has been the source of controversy in the popular and scientific literature over the past 2 decades. Mountain sheep (i.e., bighorn and thinhorn; Ovis spp.), possibly the only large ungulates in North America managed almost exclusively as trophy species throughout their ranges, embody this controversy, which has led to polarizing views among scientists and stakeholders as to how mountain sheep should be managed. Our goal in this commentary was to discuss the relative contributions of the key ecological and intrinsic factors that influence horn growth, how those factors might interact with harvest strategies, and identify what determinants of horn size are most amenable to management and most effective in achieving desired outcomes. Despite repeated results demonstrating that age or nutrition frequently override genetic contributions to size of horns, attention has been given to the role of genetics and its relationship to harvest of mountain sheep. Given the hyperbole surrounding trophy management and big horns, we suggest the importance of females in the management of mountain sheep has been largely forgotten. Maternal condition can instigate life-long effects on size and growth of males (via maternal effects), and abundance of females, in turn, affects nutritional limitation within populations through density-dependent feedbacks. If production of males with large horns is an objective, we contend that management programs should, integrate monitoring of nutritional status of populations, and where evidence indicates nutritional limitation through density dependence, seek to regulate abundance and per capita nutrition via harvest of females. We propose that extrinsic regulation (i.e., removal by harvest or translocation) is the most effective way to manage per capita availability of forage resources and, thus, nutritional limitation on growth of males. Not only can female harvest improve growth in body size and horns of males through enhanced nutrition of growing males and their mothers, such management also 1) may yield a nutritional buffer against environmental stochasticity and erratic population fluctuations, 2) be employed in areas where other management alternatives such as habitat manipulation may not be feasible, 3) may reduce frequency or magnitude of epizootic die-offs, and 4) will increase hunter opportunity and involvement in management. Ultimately, we call for greater recognition of the pervasive role of the ewe, and other female ungulates, in the production of trophy males, and that accordingly, females be better integrated into harvest and management programs. © 2017 The Wildlife Society.

Differentially harvesting individual animals with specific traits has led some to argue that such selection can cause evolutionary change that may be detrimental to the species, especially if those traits are related positively to individual fitness. Most hunters are not selective in the type of animal they take, satisfied instead to harvest any legal animal. In a few exceptions, however, regulations may limit hunters to harvest animals of a minimum size or age regardless of their personal choice. Using information from a broad range of aquatic and terrestrial systems exposed to a myriad of potential and operational selective pressures, several authors have made expansive generalizations about selective harvest and its applicability to ungulates. Harvest-based selection can potentially be intensive enough to be relevant in an evolutionary sense, but phenotypic changes consistent with hunter selection are otherwise confounded with multiple environmental influences. Factors such as age, genetic contribution of females, nutrition, maternal effects, epigenetics, patterns of mating success, gene linkage, gene flow, refugia, date of birth, and other factors affecting selection interact with harvest to impede unidirectional evolution of a trait. The intensity of selection determines potential for evolutionary change in a meaningful temporal framework. Indeed, only under severe intensity, and strict selection on a trait, could human harvest prompt evolutionary changes in that trait. Broad generalizations across populations or ecological systems can yield erroneous extrapolations and inappropriate assumptions. Removal of males expressing a variety of horn or antler sizes, including some very large males, does not inevitably represent directional artificial selection unless the selective pressures are intensive enough to cause a unidirectional shift in allele frequencies that may act on some relevant life-history trait or process. Here I review the topic of harvest-based selection in male ungulates and discuss the inefficiency of trophy hunting in changing genetic expression of phenotype. © 2017 The Wildlife Society.

Bounty programs have been historically implemented as a means of controlling invasive or pest species. Although bounty programs are generally considered to be ineffective, they are still proposed as management tools in situations where other management strategies have been unsuccessful. The wild pig (Sus scrofa) is an invasive large mammal in North America and most management strategies have proven to be ineffective at reducing or eliminating its populations, resulting in population expansion in recent decades. Fort Benning Army Infantry Training Center, Georgia, USA, had been inhabited by wild pigs since the mid-1900s. In response to increasing negative impacts on flora, fauna, and military training activities and equipment, Fort Benning began offering a bounty on pigs in June 2007 to reduce the population and eventually eradicate wild pigs from the installation. To gauge the effectiveness of the program, we evaluated the population response of wild pigs within 2 study areas on the installation from June 2007 to February 2008. During the study, 1,138 pigs were harvested throughout the installation at a total cost (bounties paid and administration) of US$57,296. Surveys indicated that pig density and occupancy rates increased 23–130% and 12–19%, respectively, during the course of the bounty program. Additionally, sounder size and number of juveniles per adult female increased 144–233% and 191–219%, respectively. These data suggest that the wild pig population was increasing during the period when the bounty program was in effect. We hypothesize that this was due to increased food availability and reproduction associated with baiting wild pigs during the program, and because efforts of program participants were focused on eliminating the segment of the pig population that would maximize return on effort and “trophy” quality of animals rather than on the segment of the population that would most greatly influence population growth. © 2017 The Wildlife Society.

What does trophy hunting (selective hunting for recreation) contribute to wild lion conservation? Macdonald (Report on Lion Conservation with Particular Respect to the Issue of Trophy Hunting. WildCRU, Oxford, UK, 2016) summarises what we know. We identify unknowns, gaps in the knowledge that inhibit conservation planning, including: the causes of lion mortality, the amount of land used for lion trophy hunting, the extent to which trophy hunting depends on lions for financial viability, and the vulnerability of areas used for hunting to conversion to land not used for wildlife, if trophy hunting ceased. The cost of reversing biodiversity loss exceeds income from tourism, including hunting. New financial models are needed, particularly in view of the expanding human population in Africa.

Sport hunting of wildlife can play a role in conservation but can also drive population declines if not managed sustainably. Previous simulation modelling found that large felid species could theoretically be hunted sustainably by restricting harvests to older individuals that have likely reproduced. Several African countries currently use age-based hunting for lions although the outcomes have yet to be evaluated in a wild population. Here we provide the first empirical evidence that a system of incentives sufficiently encouraged age-based hunting and reduced offtake of a wild felid, thereby reducing the potential risk of unsustainable hunting on a threatened species. We examined long-term hunting data and the lion population trend in Niassa National Reserve, Mozambique. To incentivise hunter compliance, a “points” system was developed, which rewards operators that harvest lions older than the 6-year minimum trophy age recommended for sustainable hunting and penalises operators that hunt “underage” lions ( 6 years), from 25% of offtakes in 2004 to 100% by 2014. Simultaneously, the number of lions and percentage of quota harvested decreased, resulting in lower lion offtakes. Following an initial decrease after enforcement of the ageing system, the percentage of hunts harvesting lions stabilised, demonstrating that hunters successfully located and aged older lions. Synthesis and applications. Evidence suggests that age restrictions combined with an incentive-based points system regulated sport hunting and reduced pressure on the lion population. We attribute the successful implementation of this management system to: (1) committed, consistent enforcement by management authorities, (2) genuine involvement of all stakeholders from the start, (3) annual auditing by an independent third party, (4) the reliable, transparent, straightforward ageing process and (5) the simple, pragmatic points system for incentivising hunter compliance. Our study demonstrates that the use of age restrictions can increase the selectivity of sport hunting and lower trophy offtakes to reduce the possibility of unsustainable sport hunting negatively impacting species populations in the absence of reliable estimates of population size. It must be noted, however, that there was no measurable change in the lion numbers over the past decade that could be attributed to the implementation of this policy alone.

Trophy hunting, the selective removal of animals for human recreation, can contribute to conservation when appropriately managed. Yet, little is known about how harvest rates or different definitions of trophy affect age structure and trophy size in harvested animals and in survivors because no controlled studies exist. To investigate the impacts of different management regimes, we developed an individual-based model for bighorn sheep (Ovis canadensis), based on empirical data on survival from a protected population and data on horn growth from 2 populations that differed in their growth rates. One population showed slow horn growth and the other population fast horn growth. We subjected these model populations to varying harvest rates and 2 different hunting regulations: 4/5 curl and full-curl definitions of a trophy male. We found that the effect of hunting regulations depends on horn growth rate. In populations with fast horn growth, the effects of trophy hunting on male age structure and horn size were greater and the effect of a change in the definition of legal male smaller than in populations with slow growth rates. High harvest rates led to a younger age structure and smaller horn size. Both effects were weakened by a more restrictive definition of trophy male. As harvest rates increased past 40% of legal males, the number of males harvested increased only marginally because an increasing proportion of the harvested males included those that had just become legal. Although our simulation focused on bighorn sheep, the link between horn growth rate and harvest effects may be applicable for any size-selective harvest regime. © 2017 The Wildlife Society.

Studies utilizing radio tags to examine animal space use are widespread and often require the survival of marked animals over the entirety of a specified study period to answer movement-related questions. When studying the space use of game species, tactics such as applying visible markings to research animals and communicating with hunters may be needed to mitigate unwanted losses due to hunter harvest. Information regarding the effectiveness of visible markings and communication efforts in reducing harvest, as well as examples of hunter cooperation with requests to avoid harvesting marked animals, are lacking but could be quite useful when designing movement studies and planning capture efforts. Across 3 studies conducted during 2009–2015 on public and private land in the southeastern United States, adult white-tailed deer (Odocoileus virginianus) were captured and marked in 1 of 3 ways: via conspicuous (Global Positioning System [GPS]) radiocollar; conspicuous radiocollar combined with visible ear tags; or cryptic (very-high-frequency [VHF]) radiocollar. Hunters were asked not to harvest visibly marked deer (GPS radiocollars, with or without ear tags) and survival was compared with that of cryptically marked (VHF) animals. Visibly marked deer were less likely to be harvested than were cryptically marked individuals on private land, but collar types were treated similarly on public land. Additionally, visibly marked males were more likely to be harvested than visibly marked females and the likelihood of harvest increased with male deer age. Our findings suggest that hunter cooperation decreases with the opportunity to harvest a “trophy” and that cooperation is lower on public land compared with private land. Insight into hunter treatment of visibly marked deer can inform researchers and managers about expected losses when conducting long-term spatial monitoring of ungulates and other game species. © 2017 The Wildlife Society.

Black bass Micropterus spp. support popular freshwater sport fisheries in North America. Bass anglers commonly adopt catch and release as a conservation practice, and frequently over 75% of angled black bass are released back into the water. If fish survive the angling event, the practice of catch and release as an alternative to harvest reduces direct mortality, but it has the potential to affect the postrelease feeding behavior and survival of the fish. The act of lifting black bass for handling, hook removal, and photograph opportunities may cause stress and injury, and the degree of injury sustained could be influenced by fish size. Holding fish in a tilted grip by the jaw has raised concern among anglers about potential damage to jaw musculature and tendons, as they may not support the fish’s body weight out of water, particularly for trophy bass. We conducted an experiment with Florida Largemouth Bass M. salmoides floridanus to evaluate the relative differences in survival, jaw mechanics, an...

Cranial remains retained from fallen enemies are commonly referred to as "trophy skulls," and many such crania were acquired as souvenirs by U.S. servicemembers during WWII and the Vietnam conflict. These remains increasingly have become the subject of forensic anthropological analysis as their possessors, typically veterans or their relatives, try to discard or repatriate them. The present research uses a qualitative analytical approach to review 24 cases of reported trophy skulls (14 previously unpublished cases and 10 from the literature) to determine which perimortem and postmortem characteristics are most useful for generating a taphonomic profile. Overall, the taphonomic signature of trophy remains includes traits relating to acquisition and preparation, ornamental display, and subsequent curation. Contextual evidence and the biological profile also are considered when determining the possible origin of human cranial remains as a trophy skull. Thorough taphonomic analysis will aid in identifying these types of remains as trophy skulls.

The development of male secondary sexual characters such as antlers or horns has substantial biological and socio-economic importance because in many species these traits affect male fitness positively through sexual selection and negatively through trophy hunting. Both environmental conditions and selective hunting can affect horn growth but their relative importance remains unexplored. We first examined how a large-scale climate index, the Pacific Decadal Oscillation (PDO), local weather and population density influenced both absolute and relative annual horn growth from birth to three years of male bighorn sheep Ovis canadensis over 42 years. We then examined the relative influence of environmental conditions and evolution mainly driven by trophy hunting on male horn length at three years of age. Horn growth was positively influenced by low population density and warm spring temperature, suggesting that ongoing climate change should lead to larger horns. Seasonal values of PDO were highly correlated. Horn growth increased with PDO in spring or summer at low density, but was weak at high density regardless of PDO. The interaction between population density and PDO in spring or summer accounted for a similar proportion of the observed annual variation in horn growth (32% or 37%) as did the additive effects of spring temperature and density (34%). When environmental conditions deteriorated, males allocated relatively more resources to summer mass gain than to horn growth, suggesting a conservative strategy favoring maintenance of condition over allocation to secondary sexual characters. Population density explained 27% of the variation in horn length, while evolutionary effects explained 9% of the variance. Thus, our study underlines the importance of both evolution and phenotypic plasticity on the development of a secondary sexual trait.

The Red River of the North (Red River) is managed with a unique set of regulations aimed at conserving the age structure and size structure of a trophy Channel Catfish population. Although these regulations have been in place for >20 years, current population dynamics have not been evaluated postregulation. Our objectives were to (1) document dynamic rate functions (i.e., growth and mortality), age structure, and size structure of Channel Catfish in the lower Red River, and (2) compare current population dynamics with historical conditions in the lower Red River and other populations. We documented a maximum age of 27, and ages greater than 20 were common (7%). We estimated an annual mortality rate of 0.19, which was similar to mortality estimates for Channel Catfish in the Red River from the USA. Growth rates for individuals ages 3–10 were similar among our study, historical growth estimates, and upstream estimates. Conservative harvest regulations appear to be preserving the desired age structur...

To determine whether a consumption-oriented fishery was compatible with a trophy-oriented fishery for Muskellunge Esox masquinongy, we modeled effects of a spearing fishery and recreational angling fishery on population size structure (i.e., numbers of fish ≥ 102, 114, and 127 cm) in northern Wisconsin. An individual-based simulation model was used to quantify the effect of harvest mortality at currently observed levels of recreational angling and tribal spearing fishery exploitation, along with simulated increases in exploitation, for three typical growth potentials (i.e., low, moderate, and high) of Muskellunge in northern Wisconsin across a variety of minimum length limits (i.e., 71, 102, 114, and 127 cm). Populations with moderate to high growth potential and minimum length limits ≥ 114 cm were predicted to have lower declines in numbers of trophy Muskellunge when subjected to angling-only and mixed fisheries at observed and increased levels of exploitation, which suggested that fisheries with...

Management of Blue Catfish Ictalurus furcatus and Channel Catfish I. punctatus for trophy production has recently become more common. Typically, trophy management is attempted with length-based regulations that allow for the moderate harvest of small fish but restrict the harvest of larger fish. However, the specific regulations used vary considerably across populations, and no modeling efforts have evaluated their effectiveness. We used simulation modeling to compare total yield, trophy biomass (Btrophy), and sustainability (spawning potential ratio [SPR] > 0.30) of Blue Catfish and Channel Catfish populations under three scenarios: (1) current regulation (typically a length-based trophy regulation), (2) the best-performing minimum length regulation (MLRbest), and (3) the best-performing length-based trophy catfish regulation (LTRbest; “best performing” was defined as the regulation that maximized yield, Btrophy, and sustainability). The Btrophy produced did not differ among the three scenarios. ...

Although being an important conservation tool in Africa, trophy hunting is known to influence risk perception in wildlife species, thus affecting the behaviour and fitness of most targeted species. We studied the effects of trophy hunting on the flight behaviour of impala (Aepyceros melampus), greater kudu (Tragelaphus strepsiceros) and sable (Hippotragus niger) in two closed ecosystems, Cawston Ranch (hunting area) and Stanley and Livingstone Private Game Reserve (tourist area), western Zimbabwe. Using standardized field procedures, we assessed the flight behavioural responses of the three species in two seasons: non-hunting (December–March) and hunting (April–November) between March 2013 and November 2014. We tested the effect of habitat, group size, sex, season, start distance and alert distance on flight initiation distance using linear mixed models. Habitat, group size sex and alert distance did not have any effect on flight initiation distance for the three species. The three species were more alert and displayed longer flight initiation distances in the hunting area compared with the tourist area. Flight initiation distances for the three species were higher during the hunting season for the hunting area and low during the non-hunting season. Flight distances of the three species did not differ between the hunting area and the tourist area. We concluded that trophy hunting increased perceived risk of wild ungulates in closed hunting areas, whereas ungulates in non-hunting areas are less responsive and somehow habituated to human presence. Management plans should include minimum approach distances by tourists as well as establishing seasonal restrictions on special zones to promote species viability. Research aimed at integrating behavioural responses with physiological aspects of target species should be promoted to ensure that managers are able to deal with the behavioural trade-offs of trophy hunting at local and regional scale.

Hunting is a common component in the management of ungulate species. Despite its widespread use, the influence of selective harvesting on phenotypic trait change is still ambiguous, and represents a critical gap in our understanding of the responses of wild populations under harvest. Using the long-term red deer (Cervus elaphus) dataset (1972–2012) from the Isle of Rum National Nature Reserve, Scotland, we assessed the relationship between antler length and key demographic processes (i.e., survival, recruitment, antler growth, parent-offspring trait correlation) for the male component of the population. We then constructed the first integral projection model for this species to examine the effects of simulated trophy hunting on 2 population-level parameters: the stable antler size distribution and the relative reproductive value of males. When male mortality rates due to hunting were

Though the conservation community has long premised its moral foundations on consequentialist thinking and has embraced a dualistic worldview severing reason from emotion, the conservation community has erred by failing to address—or even acknowledge—the limitations of these fundamental tenets. This failure reemerged in 2015 when a wealthy hunter killed an African Lion named Cecil for a trophy, in turn, prompting a debate within the conservation community about the appropriateness of killing Cecil. A number of conservationists: (1) defended such instances of trophy hunting on the basis that money generated by trophy hunting can support conservation and (2) ridiculed as irrational those who oppose such instances of killing in the name of conservation. We suggest this response by the conservation community represents common, but problematic, ethical reasoning. We offer a critique of both the ethical underpinning of such reasoning and the assumptions about the relationship between reason and emotion. We urge ethical and social psychological maturation on behalf of the conservation community.

The global population size of African lions is plummeting, and many small fragmented populations face local extinction. Extinction risks are amplified through the common practice of trophy hunting for males, which makes setting sustainable hunting quotas a vital task. Various demographic models evaluate consequences of hunting on lion population growth. However, none of the models use unbiased estimates of male age-specific mortality because such estimates do not exist. Until now, estimating mortality from resighting records of marked males has been impossible due to the uncertain fates of disappeared individuals: dispersal or death. We develop a new method and infer mortality for male and female lions from two populations that are typical with respect to their experienced levels of human impact. We found that mortality of both sexes differed between the populations and that males had higher mortality across all ages in both populations. We discuss the role that different drivers of lion mortality may play in explaining these differences and whether their effects need to be included in lion demographic models. Synthesis and applications. Our mortality estimates can be used to improve lion population management and, in addition, the mortality model itself has potential applications in demographically informed approaches to the conservation of species with sex-biased dispersal. Our mortality estimates can be used to improve lion population management and, in addition, the mortality model itself has potential applications in demographically informed approaches to the conservation of species with sex-biased dispersal. Journal of Applied Ecology. © 2016 British Ecological Society.

Trophy hunting is widely used in Africa to generate funding for wildlife areas. In 2015, a global media frenzy resulted from the illegal killing of a radio-collared lion, “Cecil,” by a trophy hunter in Zimbabwe. Trophy hunting is contentious and much of the media discourse is emotional and polarized, focusing on animal welfare and debating the value of hunting as a conservation tool. We use the Cecil incident to urge a change in the focus of discussion and make a call for global action. We highlight the dual challenge to African governments posed by the need to fund vast wildlife estates and provide incentives for conservation by communities in the context of growing human populations and competing priorities. With or without trophy hunting, Africa's wildlife areas require much more funding to prevent serious biodiversity loss. In light of this, we urge a shift away from perpetual debates over trophy hunting to the more pressing question of “How do we fund Africa's wildlife areas adequately?” We urge the international community to greatly increase funding and technical support for Africa's wildlife estate. Concurrently, we encourage African governments and hunters to take decisive steps to reform hunting industries and address challenges associated with that revenue generating option.

Lake Trout Salvelinus namaycush have been introduced widely throughout the western USA to enhance recreational fisheries, but high predatory demand can create challenges for management of yield and trophy fisheries alike. Lake Trout were introduced to Priest Lake, Idaho, during the 1920s, but few fishery-independent data are available to guide current or future management actions. We collected fishery-independent data to describe population dynamics and evaluate potential management scenarios using an age-structured population model. Lake Trout in Priest Lake were characterized by fast growth at young ages, which resulted in young age at maturity. However, adult growth rates and body condition were lower than for other Lake Trout populations. High rates of skipped spawning (>50%) were also observed. Model projections indicated that the population was growing (λ = 1.03). Eradication could be achieved by increasing annual mortality to 0.32, approximately twice the current rate. A protected slot leng...

Many agencies and researchers use data from harvested animals to study temporal trends in phenotype. For large mammals, complete harvest records are typically only available for the past few decades, but records of the largest trophies have been collected for over a century. To examine whether record books and data from male bighorn sheep (Ovis canadensis) harvested under a minimum-curl regulation could detect temporal trends in horn length, we simulated populations of trophy-harvested male bighorn sheep where horn length was modeled to increase, remain stable, and decrease over time. All populations experienced a simulated harvest based on a minimum horn length, but only horns in the longest 5% of the initial distribution were entered in a fictional record book. We then assessed whether monitoring of harvested and “record” males detected temporal trends. Data from selective harvest underestimated declines and initially underestimated increases, but qualitatively detected both trends. Record-book entries, however, severely underestimated increases and did not detect declines, suggesting that they should not be used to monitor population trends. When these biases are taken into account, complete trophy harvest records can provide useful biological information. © 2015 The Wildlife Society.

In collaboration with Carrie V. Wilson, Native American Graves Protection and Repatriation Act of 1990 (NAGPRA) Director for the Quapaw Tribe of Oklahoma, researchers at Indiana University undertook a comprehensive study of NAGPRA collections from the Gant site (3MS11), a pre-Columbian village site in Mississippi County, Arkansas. Following non-destructive, macroscopic analysis of skeletal material, evidence of violent trauma was identified in two young adult men from the site. In one individual, the trauma was likely perimortem, and the morphology and distribution of lesions were found to be consistent with trophy taking documented in the ethnohistory and archaeology of the region. In the second individual, the trauma was survived, indicated by lesions attributed to healing on the occipital squama and hyoid. The relationship between the violence identified in this study and other violence in the archaeological and ethnohistoric record of the region is discussed. Copyright © 2015 John Wiley & Sons, Ltd.

The growth potential of Muskellunge Esox masquinongy was evaluated by back-calculating growth histories from cleithra removed from 305 fish collected during 1995–2011 to determine whether it was consistent with trophy management goals in northern Wisconsin. Female Muskellunge had a larger mean asymptotic length (49.8 in) than did males (43.4 in). Minimum ultimate size of female Muskellunge (45.0 in) equaled the 45.0-in minimum length limit, but was less than the 50.0-in minimum length limit used on Wisconsin's trophy waters, while the minimum ultimate size of male Muskellunge (34.0 in) was less than the statewide minimum length limit. Minimum reproductive sizes for both sexes were less than Wisconsin's trophy minimum length limits. Mean growth potential of female Muskellunge in northern Wisconsin appears to be sufficient for meeting trophy management objectives and angler expectations. Muskellunge in northern Wisconsin had similar growth potential to those in Ontario populations, but lower growth ...

As an object of anthropological inquiry, trophy hunting occupies a marginal position at best—due in part to the pronounced moral assessments it seems to provoke. Questioning this lack of attention, the present article interrogates the role that hunting, as a discursive practice, may have in what has been defined as the “species” turn in anthropology. Overall, the article argues that the type of narratives promoted under the multispecies ethos and the discursive renditions that hunters produce of their experiences share a similar semiotic mechanism in the way both genres incorporate nonhumans as active (even if tacit) coauthors of said narratives—via the works of a semiotic process defined as entextualization. In consequence, this analogous structuring allows for the recognition of a common ethical ground toward nonhumans in practices that may intuitively read as having radically divergent ethical agendas: an important lesson not only for wildlife conservation efforts, but also for the overall multispecies approach.

Lake of the Ozarks, Harry S. Truman Reservoir, and Table Rock Lake in Missouri contain important recreational trophy Paddlefish fisheries. These three reservoirs have been created by damming major rivers. Because of river modifications, Paddlefish natural reproduction is thought to be limited, and subsequently, populations have been maintained through supplementation and harvest regulations. However, these fisheries have not been thoroughly assessed and the applicability of management actions (e.g., supplementation and minimum length limits) has not been fully evaluated. Population simulations indicated changes in the amount of trophy sized fish and broodstock remaining of each population were similar, with larger minimum length limits resulting in a greater proportion of mature and trophy sized individuals. However, the number of Paddlefish that could be harvested at Harry S. Truman Reservoir and Lake of the Ozarks was much greater than at Table Rock Lake. These disparities are likely attributed ...

Length and structural complexity of antlers provide an indication of individual quality in many ungulates in the context of female mate choice and trophy hunting. Selectivity of hunters for individuals with various antler sizes may have bearing on the population structure. It is less well understood, however, whether and how antler anomalies may signal individual characteristics. We used data on 2,461 roe deer (Capreolus capreolus) males harvested by stalking during 1966–2011 in western Poland to test hypotheses explaining probability of occurrence of accessory, broken, and malformed antlers. By employing a multinomial logistic regression, we showed that the probability of occurrence of broken and malformed antlers increased in males older than 2 years. Probability of occurrence of accessory and, in young males, broken antlers was higher in individuals with increased body weight. Occurrence of malformed antlers decreased over the study period. Contrary to our prediction, we did not detect an effect of distance to forest on the probability of malformed antlers occurring. We conclude that the main premise of compensatory culling is not supported in roe deer. © 2014 The Wildlife Society.

Many of the numerous monumental cannon which adorn British cities are Crimean War trophies: something little discussed in the historiography of the war. Focusing on the trophy cannon at Ludlow, in the Welsh Marches, the article looks at both the national and the local scene. It describes first the Allied operation in Sevastopol to gather prize Russian cannon and their removal to England. The utility of shipping the guns home and the uses to which they might be put were both controversial, but whether intact or melted down the cannon formed a significant part of the multifarious memorials and mementos generated by the war and Allied victory. The focus then switches to the Marches and the acquisition of trophy guns by Ludlow and neighbouring towns; the political background to Ludlow's application for a cannon is also explored, and the subsequent fate of the region's prize guns. Finally the article examines the origins of the Ludlow cannon and the identity of its founder, a British expatriate ironmaster working in Russia at the turn of the eighteenth century.

Human harvests can unwittingly drive evolution on morphology and life history, and these selective effects may be detrimental to the management of natural resources. Although theory suggests that harvest refuges, as sources of unselected animals, could buffer the effects of human exploitation on wild populations, few studies have assessed their efficiency. We analyzed records from >7000 trophy bighorn rams (Ovis canadensis) harvested in Alberta, Canada, between 1974 and 2011 to investigate if the movement of rams from refuges toward harvested areas reduced the effects of selective harvesting on horn size through phenotypic rescue. Rams taken near refuges had horns on average about 3% longer than rams shot far from refuges and were slightly older, suggesting migration from refuges into hunted areas. Rams from areas adjacent to and far from harvest refuges, however, showed similar declines in horn length and increases in age at harvest over time, indicating a decreasing rate of horn growth. Our study suggests that the influx of rams from refuges is not sufficient to mitigate the selective effects of sheep trophy harvest. Instead, we suggest that selective hunting of highly mobile animals may affect the genetic structure of populations that spend part of the year inside protected areas.

Kokanee Oncorhynchus nerka and Lake Trout Salvelinus namaycush are stocked for sportfishing in lakes and reservoirs throughout the western United States and Canada. However, where the two species co-occur, unsustainable levels of predation by Lake Trout can lead to declines in kokanee abundance and declines in Lake Trout growth and body condition. Such declines occurred in Blue Mesa Reservoir, Colorado. In 2009, managers began removing Lake Trout (

The persistence of large African herbivores in trophy hunting areas is still unclear because of a lack of data from long-term wildlife monitoring outside national parks. We compared population trends over the last 30 years in Hwange National Park, Zimbabwe, and the neighbouring Matetsi Safari Area where large herbivores were harvested at an average yearly rate of 2%. We investigated whether trophy hunting altered densities and the proportion of adult males in several large herbivore species. Large herbivores generally thrived as well, or even better, in the hunting areas than in the national park. The proportion of adult males did not differ between the two zones, except for species with higher harvest rates and proportionally more males harvested. Densities were not lower in the hunting areas than in the national park, except for elephant and impala. Large herbivores generally declined throughout the 30-year period in both zones, particularly selective grazers. This is probably because of their greater sensitivity to variation in rainfall compared with other herbivores. Rainfall indeed declined during the study period with droughts being particularly frequent during the 1990s. Browsers, mixed feeders and non-selective grazers generally declined less in the hunting areas than in the national park, possibly because of lower densities of natural predators and elephants outside the park. Our study highlighted that large herbivores may persist in trophy hunting areas as well as in national parks. When rigorously managed, trophy hunting areas may be relevant conservation areas for large herbivores, particularly under the current global decline of wildlife abundance across Africa.

The act of scalping has long been associated with Native American conflict-related human body part trophy taking. Reasons for their removal were varied and often included communal and personal factors. Previous research has identified several different types of scalp removals based on the amount of soft tissue affected during the process of scalping. One of these types can involve the removal of the ears. Through reanalysis of known scalping victims within the middle Tennessee Valley of North Alabama, we have identified five cases where victims were both scalped and had their ears removed. These cases provide a unique understanding of the practice of human body part trophy taking. They support ethnographic accounts that indicate ear removal has great time depth and was geographically widespread. Although the five cases presented here are similar to total compound scalpings, they actually represent total simple scalpings. Unlike total compound scalpings, where the ears are removed attached to the skin of the scalp, these cases show evidence of secondary removal of the ears after the scalp was already detached. This secondary removal of the ears after the act of scalping supports the interpretation that the aggressors intended different purposes for each trophy. It is likely that the scalp and ears each had their own meaning. Copyright © 2014 John Wiley & Sons, Ltd.

Trophy hunting of African elephant is often implemented as an income generator for communities surrounding protected areas. However, the sustainability of hunting on elephant populations, especially with regards to international cross-border populations has not previously been evaluated. We assessed the effects of trophy hunting on the population dynamics and movements of elephant in the Greater Mapungubwe Transfrontier Conservation Area, which is spread across the junction of Botswana, South Africa, and Zimbabwe. Currently, no common policy exits in quota setting for cross-border species, and each country determines their own quota based on limited data. Using VORTEX, we determined the sustainability of current quotas of elephant off-take under different ecological and hunting scenarios. We used distribution data from 6 aerial surveys and hunting data per region to determine the disturbance effect of hunting on bulls and breeding herds separately. Hunting of bulls had a direct effect in reducing bull numbers but also an indirect effect due to disturbance that resulted in movement of elephants out of the areas in which hunting occurred. The return interval was short for bulls but longer for females. Only a small number of bulls (