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Aquaculture has been recognised for achieving multiple United Nations Sustainable Development Goals; its further growth depends on understanding, and responding to, societal perceptions in a broader context. Thus, this study aims to understand societal perceptions of aquaculture through a scoping review and media analysis. A scoping review identified 151 academic studies for inclusion in our five identified research clusters: (1) social acceptability, (2) growth and development, (3) media coverage, (4) sustainable aquaculture, and (5) consumer perceptions. Further, newspaper articles (n = 100) were sampled from the United Kingdom, Denmark, France, Spain, Turkey, and China; elsewhere all articles identified were included (Poland, 79; Hungary, 29; India, 70). The findings suggest that scientific and newspaper articles tend to present sustainability aspects in a simplified form. Key stakeholder groups include fish farming enterprises, civil society, governmental officials, scientists, and business leaders both within aquaculture value chains (retailers/wholesalers, technology industry) and outside of them (fisheries, tourism). Also, other stakeholders included the public (indigenous groups, residents, consumers). The stakeholder groups perceived aquaculture differently and depending on the circumstances and context, their perceptions ranged from positive to negative. Many factors influenced their perceptions, including aquaculture's impact on multiple sustainability dimensions, knowledge, transparency, personal interests, types, and location of aquaculture practises, regulations, experience, and sociodemographic characteristics such as age, gender, education, and income. We recommend that aquaculture practitioners focus on context‐specific multifaceted strategies—prioritising transparency, communication, and accountability—and provide essential knowledge to ensure that societal perceptions of aquaculture are based on accurate, empirical information. [ABSTRACT FROM AUTHOR]

Climate change will expose the food‐producing sector to a range of challenges. Inland aquaculture farms are particularly vulnerable, due to the difficulty in changing their location, and therefore require specific tools to predict the influence of direct and indirect effects on production, environment and economic feasibility. The objective of our study was to apply a simple set of models to produce a set of growth, risk and suitability maps for stakeholders within the common carp sector in Poland, to assist decision‐making under two different scenarios of climate change: a moderate situation (RCP 4.5) and an extreme situation (RCP 8.5). We used present (2000–2019) and future projections (2080–2099) for water surface temperature based on land surface temperature data from regionally downscaled climate models to draw maps to: (i) show optimal temperature conditions for carp growth, (ii) assess risk of disease outbreak caused by three important common carp pathogens: Cyprinid herpesvirus 3 (CyHV‐3), carp oedema virus (CEV) and spring viremia of carp (SVCV) and (iii) predict potential suitability changes of carp farming in Poland. The study identified areas with the most and least favourable temperature conditions for carp growth, as well as those areas with the highest/lowest number of days with suitable temperatures for virus infection. These suitability maps showed the combined effect of direct and indirect effects of climate change projections under RCP 8.5 and RCP 4.5 scenarios. The approach applied herein will be of use worldwide for analysing the risks of temperature increase to land‐based aquaculture, and the results presented are important for carp farmers in Poland and elsewhere, industry in general, and government stakeholders, to understand the direct and indirect effects of climate change on the triple bottom line of people, planet, and profit. [ABSTRACT FROM AUTHOR]

Giant mottled eel (Anguilla marmorata) farming in Vietnam is a multistage process starting from wild harvest of glass eels through the so‐called "hatcheries" and distribution centres from which individuals are transferred to rearing farms and subsequently sold by one eel farm to another every 3–5 months. The information on viral agents spread and persistence in the Vietnamese eel aquaculture is scarce. Therefore, the mortality of A. marmorata at the Van Xuan Farm was the prerequisite to identify the possible aetiologic agent and additionally to formulate first recommendations for viral disease screening in the Vietnamese eel aquaculture. Juvenile giant mottled eels with haemorrhagic lesions in the skin and liver, and hyperaemia of the gut were tested with qPCR and end‐point PCR for AngHV‐1 presence. Here, we report the first detection of AngHV‐1 associated with mortality in giant mottled eel in winter and spring seasons. On the basis of the obtained results, we recommend to test eel seeds in "hatcheries," since tropical eel farms operate in interconnected scheme and monitoring of AngHV‐1 prevalence requires well‐implemented measures. Disease screening in the rearing centres and on‐growing facilities should be based on everyday health checks, including by‐catch fish used as a base of the feeding programmes at eel farms in Vietnam. [ABSTRACT FROM AUTHOR]

Keywords: alien and invasive species; cage culture; common carp; koi herpesvirus; thermal island EN alien and invasive species cage culture common carp koi herpesvirus thermal island 821 824 4 06/15/20 20200701 NES 200701 INTRODUCTION Cyprinid herpesvirus 3 (CyHV-3), also known as koi herpesvirus (KHV), is one of the major factors causing worldwide severe economic losses mainly in common carp ( I Cyprinus carpio i L.) production since the agent is highly contagious and extremely virulent, with a mortality rate of 80-100% (Rakus et al., [14]). Seven days prior first mortalities of carp, shells with partially decayed swan mussels and Chinese pond mussels ( I Sinanodonta woodiana i ) appeared on the water surface and were floating by the cages. In 2007 and 2008, Kielpi'nski et al. ([11]) identified CyHV-3 in tissues of swan mussels and scuds collected in carp ponds in southern Poland, where KHVD episodes were observed in the period of 2002-2007. [Extracted from the article]

The Community Action Plan requests EU member states to implement measures that ensure the recovery of the severely depleted European eel stocks. One of the main threats is posed by Anguillid herpesvirus 1 (Ang HV-1) leading to increased mortality in both wild and farmed eels. Following recommendations of the OIE to minimize the risk of obtaining false-negative results, the main aim of the study was to optimize diagnostic methods for Ang HV-1 detection using conventional PCR, nested PCR and in situ hybridization assay. While 53.3% of the individual organ samples were tested positive for Ang HV-1 by PCR, the additional virus analysis via nested PCR revealed that the actual prevalence was 93.3%. In the cell cultivation passages, a cytopathic effect was hardly found in the first two rounds. In the third passage onto cell cultures, a lytic CPE was detected. The identification and confirmation of the viruses obtained from cell cultures as well as directly from the organ tissues were proceeded by PCR, nested PCR and sequencing of the PCR products. While no positive signal was detectable in the first round by PCR using samples from the third cell culture passages, the nested PCR provided weak but visible positive signals. [ABSTRACT FROM AUTHOR]

Homogeneous background (age, sex, genetic lineage, culture conditions) was created to clearly demonstrate the impact of the tested dietary treatments. No feeds optimized for the rearing of the tench ( Tinca tinca L. 1758) are available. Feeds are formulated to increase the growth rate or eliminate skeletal deformations. With the increasing prices of the basic components, fish meal ( FM) and fish oil, poultry by-product meal ( PBM) can be used. The aim of the study was to evaluate the effects of substitution of FM with PBM on the tench blood parameters, body composition and structure of skeletal muscles. Cage-reared female tenches (325 ± 18 g) were fed for 86 days with five types of feeds with 0% (control), 25.7%, 48.6%, 71.4% and 100% substitution of FM with PBM. No significant differences between the formulations were reported for weight, total length, fillet weight, visceral, liver, gonado-somatic, proximate composition and biochemical blood parameters. However, significant differences were found in the fillet profiles of fatty acids-an increase in the PBM content correlated with an increase in saturated and monounsaturated fatty acids and a decrease in n-3 PUFA and, generally, n-6 PUFA. Significant differences were also observed in, for example, the content of intramuscular fatty tissue and the level of organ lipidosis between the control variant (0% PBM) and that with 100% substitution. A sensory assessment indicated a higher gustatory value of the fillets in the case of feeds with 48.6% and 71.4% substitution. [ABSTRACT FROM AUTHOR]