Sustainability of animal-sourced foods and plant-based alternatives

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(50)

Published: Dec. 2, 2024

Language: Английский

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Qualitative Behavioural Assessment as a welfare indicator for farmed Atlantic salmon (Salmo salar) in response to a stressful challenge

Frontiers in Veterinary Science, Journal Year: 2023, Volume and Issue: 10

Published: Sept. 28, 2023

Animal welfare assessments have struggled to investigate the emotional states of animals while focusing solely on available empirical evidence. Qualitative Behavioural Assessment (QBA) may provide insights into an animal's subjective experiences without compromising scientific rigor. Rather than assessing explicit, physical behaviours (i.e., what are doing, such as swimming or feeding), QBA describes and quantifies overall expressive manner in which execute those how relaxed agitated they appear). While has been successfully applied a variety species, its application within aquaculture remains largely unexplored. This study aimed assess QBA's effectiveness capturing changes behaviour Atlantic salmon following exposure stressful challenge. Nine tanks juvenile were video-recorded every morning for 15 min over 7-day period, middle challenge (intrusive sampling) was conducted salmon. The resultant 1-min, 63 video clips then semi-randomised avoid predictability treatment bias scorers. Twelve salmon-industry professionals generated list 16 qualitative descriptors (e.g., relaxed, agitated, stressed) after viewing unrelated video-recordings depicting varying characteristics different contexts. A group 5 observers, with varied experience farming, subsequently scored each clip using Visual Analogue Scale (VAS). Principal Components Analysis (correlation matrix, no rotation) used identify perceived patterns across video-clips, revealed 4 dimensions explaining 74.5% variation between clips. PC1, ranging from 'relaxed/content/positive active' 'unsettled/stressed/spooked/skittish' explained highest percentage (37%). scores video-clips PC2, PC4 achieved good inter- intra-observer reliability. Linear Mixed Effects Models, controlled observer PC1 scores, showed significant difference before sampling (p = 0.03), being more stressed afterwards. also correlated positively darting (r 0.42, p < 0.001). These results first report sensitivity putatively challenge, demonstrating potential indicator aquaculture.

Language: Английский

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Biofilm formation and auto-aggregation abilities of novel targeted aqua-probiotics

Functional Foods in Health and Disease, Journal Year: 2023, Volume and Issue: 13(4), P. 179 - 179

Published: April 4, 2023

Background: The probiotics’ auto-aggregation and biofilm formation abilities have a significant role in the development of biotechnological processes.Objective: aim this study was to evaluate novel, targeted aqua-probiotics isolated from aquatic organisms.Methods: Lactobacillus delbrueckii str. UZ-1, Lactiplantibacillus plantarum R3, Lactococcus UZ-2, Enterococcus faecium R2, Pediococcus acidilactici N culture collection Microbiology Academy Sciences Republic Uzbekistan, Bacillus subtilis 1R, amyloliquefaciens 4R Southern Federal University Russa Lacticaseibacillus rhamnosus 1A 9-3 Armenian National Agrarian were assessed.Results: According investigations, N, 4R, 5R, 0.119 ± 0.05D, 0.113 0.065D, 0.196 0.04D, 0.116 0.01D, 0.152 0.74 0.15D, 2.621± 0.55D, 1.831 0.45D, 0.227 0.04D 0.483 0.15D respectively. highest rate shown by strain with ability form biofilm. These two strains are also distinguished DNA protective properties relatively low antioxidant activity. Despite fact that 5R showed after 2 hours, lowest level among studied 24 hours. activity ability.Conclusion: novel aquaprobiotics distinct aggregation properties, which important consider when planning appropriate processes, requiring specific membrane probiotics.Graphical Abstract: Membrane aquaprobiotics.Keywords: Lactobacilli, aqua-probiotic, activity, formation, aggregation,

Language: Английский

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The Impact of Marine Resource-Free Diets on Quality Attributes of Atlantic Salmon

Fishes, Journal Year: 2024, Volume and Issue: 9(1), P. 37 - 37

Published: Jan. 17, 2024

The influence of feeding Atlantic salmon for 90 days on diets that excluded fishmeal (FM) and fish oil (FO) was examined various quality traits. In addition, the effect adding krill meal (KM; 0%, 2.5%, 5%), as a putative feed palatant also examined. Total replacement FM/FO had limited production characteristics, affecting percentage yields headed gutted control their standard length (p < 0.05). Variances between dietary groups were observed pigmentation, plant protein-based KM-free-fed returned deeper hues across belly, NQC (Norwegian Quality Cut), back portions 0.03). No differences measured relative fin condition. δ13C δ15N concentrations lower higher, respectively 0.05) fed FM/FO-based diet. δ13C:δ15N likewise differed treatments with FM/FO-fed expressing higher ratios. Fillet mechanical characteristics varied animal diets, without KM springiness resilience Fish plant-based generally preferred by younger taste testers. results from this trial illustrate can be completely removed problematic effects palatability attributes.

Language: Английский

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Framework for Automated Wound Detection and Tracking in Industrial Scale Fish Farms

Published: June 11, 2024

Language: Английский

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Vitamin A in Fish Well-Being: Integrating Immune Strength, Antioxidant Capacity and Growth

Fishes, Journal Year: 2024, Volume and Issue: 9(8), P. 330 - 330

Published: Aug. 22, 2024

This review synthesizes the multifaceted role of vitamin A in fish well-being, encompassing immune function, antioxidant capacity and growth regulation, providing a comprehensive understanding its significance diets implications for aquaculture. Key objectives include exploring immunology, impact, oxidative stress status, future directions. Vitamin is critical cell development, enhancing both innate adaptive responses. It maintains mucosal integrity modulates phagocytic activity, crucial pathogen defense. Growth regulation influenced by through cellular differentiation morphogenesis, essential tissue skeletal development. Studies indicate that supplementation improves metrics body composition across various species. also combats scavenging free radicals, enzyme inducing autophagy, thus protecting components from damage. Interactions with other vitamins like E, D, C highlight importance balanced nutrition Integrative management practices, including nutritionally diets, optimal water quality, reduction, environmental enrichment, are recommended to maximize health productivity adequate utilization.

Language: Английский

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A Global Synthesis of Environmental Enrichment Effect on Fish Stress

Fish and Fisheries, Journal Year: 2024, Volume and Issue: 26(1), P. 131 - 154

Published: Nov. 17, 2024

ABSTRACT The stress‐coping ability (SCA) is one of the core aspects fish welfare and vital importance for production in aquaculture industry fitness hatchery release. Environmental enrichment (EE), a method introducing external stimuli into husbandry environment, has been recently proposed to improve SCA, but present experimental evidence mixed, reasons these discrepancies are unclear. Here, we conducted global meta‐analysis using data set that consists 1786 cases from 107 studies across 42 species solve this problem. Overall, found enriched had significantly higher SCA than control fish, reflected either basal stress levels or responses. Meta‐regression analyses showed specific subgroups type, developmental stage, category, duration, place, sample tissue indicator system significant positive EE effects on SCA. Multi‐model inference indicated system, characteristic mode important drivers high heterogeneity among effect sizes. These results highlight rearing systems, which will not only increase also ecological adaptability released fish. comprehensive knowledge obtained analysis provide insights ontogenetic plasticity its responses have implications improving cycle fisheries conservation.

Language: Английский

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Limited holding space reduces growth and behavioural performance in juvenile European lobsters

Applied Animal Behaviour Science, Journal Year: 2023, Volume and Issue: 266, P. 106013 - 106013

Published: July 23, 2023

Conservation aquaculture offers important tools to secure sustainable animal supplies for human use. However, intensive practices are increasingly raising concerns about the welfare conditions of farmed animals, which typically face high mortality rates due diseases, cannibalism, and aggression. Here we focus on European lobster (Homarus gammarus), an economically ecologically decapod species that has been subjected conservation programs decades. While standard husbandry procedures result into large numbers juvenile lobsters produced released, it remains poorly known whether such settings alter development behavioural life-history traits ecological importance animals survive in wild. Here, investigate size individual holding spaces affects (exploration, space use, sheltering) growth (carapace length, intermoult period, percentage moult increment) during their early benthic stages. Our results offer solid evidence rearing small not only limits slows down overall growth, but also compromises ecologically-relevant behaviours essentials these a complex risky environment. We point attention toward benefits adopting better improve hatchery-cultured can, turn, faster competent repertoires valuable organisms—likely effectiveness programs.

Language: Английский

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Towards Invertebrate Justice

Published: Jan. 1, 2024

Language: Английский

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What temperature is best for the offshore farming of the Australasian snapper, Chrysophrys auratus ? A collective examination of growth, FCR, O ₂ consumption and welfare

New Zealand Journal of Marine and Freshwater Research, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 24

Published: Nov. 18, 2024

The Australasian snapper (Chrysophrys auratus) is a candidate for offshore aquaculture in New Zealand. culture of requires knowledge the best locations farms and key variable water temperature. oxygen- capacity-limited thermal tolerance (OCLTT) hypothesis suggests fish performance optimised at temperature that maximises absolute aerobic scope (AAS), whereas 'multiple performances–multiple optima' (MPMO) idea, AAS other measures can have different optimal temperatures. Therefore, applicability OCLTT was tested by holding juveniles 15, 18, 21, or 24°C two months constructing curves (TPCs) specific growth rate (SGR), feed conversion ratio (FCR) AAS, an assessment welfare indicators. We hypothesised would apply with all TPCs 21°C. However, showed no discernible peak (although lower 15 than 18°C); SGR FCR improved non-linearly temperature; indicators varied little This lack limitation evidence MPMO are amenable to across significant range warmer likely providing highest levels productivity maintained welfare.

Language: Английский

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