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Although the fishery in Mill Meadow Reservoir has experienced wide variation in species composition, the stocking of rainbow trout (RBT) has been consistent for decades. The current annual quota is set at 5,000 ten-inch (“catchable”) triploid RBT (Table 1). (Triploids are requested in order to protect the Colorado River cutthroat trout population in UM Creek upstream of Forsyth Reservoir.) Tiger and splake trout were stocked regularly after a study conducted in the mid to late 1990s to evaluate performance and resistance to whirling disease by various trout hybrids. Utah chubs (UTC), Utah suckers (UTS), and yellow perch (YLP) have maintained self-sustaining populations in Mill Meadow and often negatively impact trout survival and growth when reaching high densities. Efforts to remove these species from the reservoir prove only temporary, as they also occur upstream in Johnson Reservoir and Fish Lake. Tiger and splake trout stocking was terminated after 2010 due to poor performance in the face of this competition. Mill Meadow Reservoir is unique in that abundant wild brown trout (BRN) resulting from recruitment upstream in the Fremont River and UM Creek often dominate the trout population in the reservoir. While many anglers target RBT, self-sustaining populations of BRN and YLP often have dominated the sport fishery.

The sport fishery in Piute Reservoir has been limited historically by periodic water fluctuation and dense populations of Utah suckers and Utah chubs. While stocked trout have at times performed well in the reservoir, poor survival and growth have been much more typical over the long-term. Good water conditions and low densities of suckers and chubs led to historically high trout survival and growth during the late 2000s. This performance decreased, however, with subsequent increases in rough fish abundance. Drought conditions and water level fluctuation caused the trout fishery to completely fail in the years following 2010. While water users avoid completely draining Piute Reservoir, so as to avoid shunting large amounts of sediment downstream, the minimum pool left does not provide sufficient conditions for successful survival of a trout fishery and may not support any kind of sport fishery. Just during the past decade, the reservoir was mostly drained at least four times (2014, 2015, 2016, 2018). Coinciding with the poor water conditions of the 2010s, Utah suckers came to dominate the Piute Reservoir fish community, comprising up to 99% of fish biomass. This dominance persisted despite repeated reduction to the minimum reservoir level over several years and a rotenone treatment in 2014.

Although the fishery in Mill Meadow Reservoir has experienced wide variation in species composition, the stocking of rainbow trout (RBT) has been consistent for decades. The current annual quota is set at 5,000 ten-inch (“catchable”) triploid RBT (Table 1). (Triploids are requested in order to protect the Colorado River cutthroat trout population in UM Creek upstream of Forsyth Reservoir.) Tiger and splake trout were stocked regularly after a study conducted in the mid to late 1990s to evaluate performance and resistance to whirling disease by various trout hybrids. Utah chubs (UTC), Utah suckers (UTS), and yellow perch (YLP) have maintained self-sustaining populations in Mill Meadow and often negatively impact trout survival and growth when reaching high densities. Efforts to remove these species from the reservoir prove only temporary, as they also occur upstream in Johnson Reservoir and Fish Lake. Tiger and splake trout stocking was terminated after 2010 due to poor performance in the face of this competition. Mill Meadow Reservoir is unique in that abundant wild brown trout (BRN) resulting from recruitment upstream in the Fremont River and UM Creek often dominate the trout population in the reservoir. While many anglers target RBT, self-sustaining populations of BRN and YLP often have dominated the sport fishery.

The sport fishery in Piute Reservoir has been limited historically by periodic water fluctuation and dense populations of Utah suckers and Utah chubs. While stocked trout have at times performed well in the reservoir, poor survival and growth have been much more typical over the long-term. Good water conditions and low densities of suckers and chubs led to historically high trout survival and growth during the late 2000s. This performance decreased, however, with subsequent increases in rough fish abundance. Drought conditions and water level fluctuation caused the trout fishery to completely fail in the years following 2010. While water users avoid completely draining Piute Reservoir, so as to avoid shunting large amounts of sediment downstream, the minimum pool left does not provide sufficient conditions for successful survival of a trout fishery and may not support any kind of sport fishery. Just during the past decade, the reservoir was mostly drained at least four times (2014, 2015, 2016, 2018). Coinciding with the poor water conditions of the 2010s, Utah suckers came to dominate the Piute Reservoir fish community, comprising up to 99% of fish biomass. This dominance persisted despite repeated reduction to the minimum reservoir level over several years and a rotenone treatment in 2014.

Species status statement for the bluehead sucker (Catostomus discobolus) (Cottus extensus).

Species status statement for the bluehead sucker (Catostomus discobolus) (Cottus extensus).

Migration is critical to animal survival because it allows them to access food and water, find good habitats, rear their young and adapt to changes in their environment. With a better understanding of wildlife migration, we can help make it a safer process for animals and people. The Utah Wildlife Migration Initiative is an effective mix of information, partnerships and technology.

Species status statement for the June sucker (Chasmistes liorus).

Species status statement for the razorback sucker (Xyrauchen texanus).

Species status statement for the flannelmouth sucker (Catostomus latipinnis).

Migration is critical to animal survival because it allows them to access food and water, find good habitats, rear their young and adapt to changes in their environment. With a better understanding of wildlife migration, we can help make it a safer process for animals and people. The Utah Wildlife Migration Initiative is an effective mix of information, partnerships and technology.

Species status statement for the razorback sucker (Xyrauchen texanus).

Species status statement for the June sucker (Chasmistes liorus).

Species status statement for the flannelmouth sucker (Catostomus latipinnis).

Several species of fishes have been introduced into the Santa Clara River system in southern California, including Catostomus santaanae (Santa Ana sucker), Catostomus fumeiventris (Owens sucker), Gila orcutti (arroyo chub), and Pimephales promelas (fathead minnow). These species are known to inhabit similar ecological niches but little is known about their associated parasite fauna. Two C. fumeiventris, 35 C. santaanae, 63 hybrid catostomids, 214 G. orcutti, and 18 P. promelas were collected and necropsied in the summers of 2017 and 2018. Nine macroparasite taxa were harvested including seven native, and two nonnative parasites Schyzocotyle acheilognathi (Asian fish tapeworm) and Lernaea cyprinacea (anchor worm). Prevalence and intensity of parasites were not related to the genetic history of these catostomids. This is the first host-association record for G. orcutti with Gyrodactylus sp., S. acheilognathi, diplostomid metacercariae, Rhabdochona sp, Contracaecum sp., and larval acuariid cysts and for P. promelas with larval acuariid cysts.

Several species of fishes have been introduced into the Santa Clara River system in southern California, including Catostomus santaanae (Santa Ana sucker), Catostomus fumeiventris (Owens sucker), Gila orcutti (arroyo chub), and Pimephales promelas (fathead minnow). These species are known to inhabit similar ecological niches but little is known about their associated parasite fauna. Two C. fumeiventris, 35 C. santaanae, 63 hybrid catostomids, 214 G. orcutti, and 18 P. promelas were collected and necropsied in the summers of 2017 and 2018. Nine macroparasite taxa were harvested including seven native, and two nonnative parasites Schyzocotyle acheilognathi (Asian fish tapeworm) and Lernaea cyprinacea (anchor worm). Prevalence and intensity of parasites were not related to the genetic history of these catostomids. This is the first host-association record for G. orcutti with Gyrodactylus sp., S. acheilognathi, diplostomid metacercariae, Rhabdochona sp, Contracaecum sp., and larval acuariid cysts and for P. promelas with larval acuariid cysts.

La revue de littérature sur les poissons fourrages de la zone littorale du lac Saint-Jean a été réalisée dans un contexte où il y a peu de connaissances sur ces poissons et qu’il est présumé que leur abondance a diminuée au fil des 30 dernières années. Ces poissons peuvent être la proie d’espèces exploitées telles que la ouananiche, le doré jaune, la lotte et le grand brochet. Ils peuvent, par conséquent, avoir un impact sur la qualité de pêche sportive. De plus, ces poissons sont susceptibles d’être affectés par la gestion du niveau de l’eau et des berges du lac, laquelle est sujette à être modifiée dans le cadre du renouvellement du Programme de stabilisation des berges du lac Saint-Jean de Rio Tinto. L’objectif de cette revue de la littérature, portant sur l’écologie reproductive et l’écologie des jeunes stades de vie, est de déterminer les habitats préférentiels utilisés par les poissons fourrages du lac Saint-Jean. Cette revue est la première étape d’un processus visant à évaluer les impacts potentiels de la gestion du niveau de l’eau et des berges sur les poissons fourrages. La revue de littérature et l’analyse des données disponibles pour le lac Saint-Jean ont permis d’identifier les habitats de reproduction et les habitats des jeunes stades de vie des poissons fourrages du lac. La zone littorale à substrat de sable et de petit gravier (profondeur de 0 à 2 m principalement, jusqu’à 6 m) représente le principal habitat de quatre espèces abondantes, soit le méné émeraude, le méné à tache noire, l’omisco et le fouille-roche zébré. Les zones littorales rocheuses (galets, blocaille) et peu profondes sont utilisées principalement par la ouitouche et le naseux des rapides. De manière moins importante, les meuniers et la perchaude peuvent aussi utiliser ces habitats. Les tributaires représentent le principal habitat de reproduction des meuniers, tandis qu’ils constituent un habitat de fraie secondaire pour le fouille-roche zébré, l’omisco, le naseux des rapides et la

The Wildlife Notebook Series is a collection of fact sheets that profile selected Utah species. This fact sheet profiles the June sucker. It provides a description and information on the June sucker's distribution, history, life cycle, and recovery efforts.

The Wildlife Notebook Series is a collection of fact sheets that profile selected Utah species. This fact sheet profiles the June sucker. It provides a description and information on the June sucker's distribution, history, life cycle, and recovery efforts.

Several hypotheses from community ecology were tested using habitat and diet patterns for six catostomid fishes of the Assiniboine River, Manitoba. Specifically, I examined expected assemblage patterns based on the equilibrium-nonequilibrium continuum that are based on competition as a structuring mechanism. The catostomid assemblage showed characteristics of both equilibrium and nonequilibrium assemblages. Habitat utilization was not proportional to habitat availability for depth, velocity, and substrate indicating habitat selection occurs. These patterns are influenced by the distributions of soft Lake Agassiz deposits and harder glacial till-plain habitats and therefore localized. Species co-occurred in relation to abundance indicating negative associations assumed in competition-based theory were not apparent. In addition, species from the same subfamily co-occurred more often than expected by chance, indicating positive within-group comparisons, except for silver redhorse, which did not co-occur differently than random. Species from the same feeding group co-occur most frequently with conspecifics, indicating species have specific habitat patterns. Benthic invertebrate distributions and fish distributions were positively correlated with fish diet. Within-feeding-group comparisons indicated species that co-occurred frequently consumed the same food items, but showed subtle differences in abundance of diet items. The most common diet items varied among white sucker, silver redhorse, golden redhorse, and shorthead redhorse, indicating that, although these species co-occur, subtle differences in feeding behavior may account for differences in relative abundance and frequency of diet items. Quillback and bigmouth buffalo shared a few core food items, but co-occurred infrequently. Inter-specific interactions showed silver redhorse diets were a subset of white sucker diets, white sucker diets were a subset of golden redhorse diets, shorthead redhorse diets were a subs

Several hypotheses from community ecology were tested using habitat and diet patterns for six catostomid fishes of the Assiniboine River, Manitoba. Specifically, I examined expected assemblage patterns based on the equilibrium-nonequilibrium continuum that are based on competition as a structuring mechanism. The catostomid assemblage showed characteristics of both equilibrium and nonequilibrium assemblages. Habitat utilization was not proportional to habitat availability for depth, velocity, and substrate indicating habitat selection occurs. These patterns are influenced by the distributions of soft Lake Agassiz deposits and harder glacial till-plain habitats and therefore localized. Species co-occurred in relation to abundance indicating negative associations assumed in competition-based theory were not apparent. In addition, species from the same subfamily co-occurred more often than expected by chance, indicating positive within-group comparisons, except for silver redhorse, which did not co-occur differently than random. Species from the same feeding group co-occur most frequently with conspecifics, indicating species have specific habitat patterns. Benthic invertebrate distributions and fish distributions were positively correlated with fish diet. Within-feeding-group comparisons indicated species that co-occurred frequently consumed the same food items, but showed subtle differences in abundance of diet items. The most common diet items varied among white sucker, silver redhorse, golden redhorse, and shorthead redhorse, indicating that, although these species co-occur, subtle differences in feeding behavior may account for differences in relative abundance and frequency of diet items. Quillback and bigmouth buffalo shared a few core food items, but co-occurred infrequently. Inter-specific interactions showed silver redhorse diets were a subset of white sucker diets, white sucker diets were a subset of golden redhorse diets, shorthead redhorse diets were a subs

Utah Conservation Data Center Species fact sheet and distribution map on the mountain sucker, Catostomus platyrhynchus.

Utah Conservation Data Center Species fact sheet and distribution map on the June sucker, Chasmistes liorus.

Utah Conservation Data Center Species fact sheet and distribution map on the flannelmouth sucker, Catostomus latipinnis.

Utah Conservation Data Center Species fact sheet and distribution map on the desert sucker, Catostomus clarkii.

Utah Conservation Data Center Species fact sheet and distribution map on the mountain sucker, Catostomus platyrhynchus.

Utah Conservation Data Center Species fact sheet and distribution map on the June sucker, Chasmistes liorus.

Utah Conservation Data Center Species fact sheet and distribution map on the desert sucker, Catostomus clarkii.

Utah Conservation Data Center Species fact sheet and distribution map on the flannelmouth sucker, Catostomus latipinnis.

The June sucker (Chasmistes liorus) is a lakesucker endemic and unique to Utah Lake, Utah. The species was federally listed as an endangered species with critical habitat on April 30, 1986 (51 FR 10857). Included as critical habitat was the lower 7.8 km (4.9 mi) of the main channel ofthe Provo River, from the Tanner Race diversion downstream to Utah Lake. The species had a documented wild population offewer than 1,000 individuals at the time of listing (51 FR 10857). The current estimates of the wild adult spawning population size in Utah Lake is closer to 300 individuals.

The June sucker (Chasmistes liorus) is a lakesucker endemic and unique to Utah Lake, Utah. The species was federally listed as an endangered species with critical habitat on April 30, 1986 (51 FR 10857). Included as critical habitat was the lower 7.8 km (4.9 mi) of the main channel ofthe Provo River, from the Tanner Race diversion downstream to Utah Lake. The species had a documented wild population offewer than 1,000 individuals at the time of listing (51 FR 10857). The current estimates of the wild adult spawning population size in Utah Lake is closer to 300 individuals.

Item donated by the Upper Mississippi River Conservation Committee (UMRCC) to Murphy Library in 2018. Part of the UMRCC Collection housed at Murphy Library, University of Wisconsin-La Crosse.