Design of a multi-parametric profile for assessing the acclimation period of juvenile brown trout after an acute transport to new housing environment

Madureira, Tânia Vieira; Costa, Joana Luísa Ferreira Gomes Alves; Malhão, Fernanda; Lopes, Célia; Gonçalves, José F.; Rocha, Eduardo

doi:10.1016/j.applanim.2019.104835

Cited by 8 publications

(6 citation statements)

References 57 publications

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“…Changes in fish behavior are considered welfare indicators. For instance, rainbow trout spend a longer time at the bottom of the tank, occupy a smaller number of tank sections, reduce swimming activity, and increase the number of abnormal movements after experiencing transport stress [ 63 ]. Variatus platy ( Xiphophorus variatus ), an ornamental fish, show increased occurrence of biting and freezing behaviors post-transport, which may increase the risk of injury [ 56 ].…”

Section: Discussionmentioning

confidence: 99%

Knowledge of, and Attitudes towards, Live Fish Transport among Aquaculture Industry Stakeholders in China: A Qualitative Study

Yang

Phillips

Shao

et al. 2021

Animals

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China is the largest food fish producer in the world. Chinese consumers normally purchase fish that are still alive to ensure freshness. Therefore, the live transport of fish is important in China’s aquaculture, although it carries potential risks for animal welfare. This study investigated the attitudes and knowledge of stakeholders within Chinese aquaculture towards the live transport and welfare of fish. Semi-structured interviews were conducted with 12 participants who were involved with the aquaculture industry in China. Most participants self-rated their transport-related knowledge as moderate and had some understanding of animal welfare, although this term was generally considered only relevant to terrestrial animals. Participants’ responses indicated that the live transport of fish occurs frequently in China, generally using sealed tanks, plastic bags, and foam boxes, in purpose-built vehicles. Seasonal changes, such as changes in ambient and water temperature, are considered to be important contributors to successful live transport, as well as sufficient oxygen supplies and stocking density. The use of anesthetics was not commonly reported, particularly in food fish, and fish capture is predominantly by conventional dipnets. The health status of transported fish is determined mostly by morphology (body injury, body or eye color, and fin condition), as well as vigor and swimming ability. Our results indicate that live transport poses a number of welfare risks to fish but that participants in the process associated welfare concerns more with terrestrial animals, not fish.

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Section: Discussionmentioning

confidence: 99%

Knowledge of, and Attitudes towards, Live Fish Transport among Aquaculture Industry Stakeholders in China: A Qualitative Study

Yang

Phillips

Shao

et al. 2021

Animals

View full text Add to dashboard Cite

show abstract

“…The maximum observation time for each group of tests was 40 min, and if the experimental fish failed to reach the vicinity of the water outlet after 40 min, the experimental fish were considered not successfully attracted. Nevertheless, such a short adaptation time and duration of the experiment may have caused some variation in the results [36,37]. To avoid the effects of light and time, the experiments were completed during well-lit periods, and the time of the experiments was kept the same as much as possible.…”

Section: Analysis Of Fish Behavioral Responsementioning

confidence: 99%

Laboratory Studies on the Rheotaxis of Fish under Different Attraction Flow Conditions

Tang

Wang

et al. 2022

IJERPH

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The damming of the river changes the structure of the original river ecosystem, and although fish passage plays an important role in maintaining the connectivity of the river ecosystem, the fish have difficulty finding the fish passage entrance during the upstream process. This paper studied the rheotaxis of fish under three different water flow conditions experimentally through recirculating water tanks. To better understand the response of Crucian carp (Carassius auratus) to water flow stimulation, the representative swimming trajectory, sensing success rate, attraction success rate, reaction time, and attraction time of the fish were analyzed by using a video monitoring system. The experimental results showed that fish responded differently to single-peak and lateral bimodal outflow conditions: (1) the single-peak outflow condition had a much better attraction effect than the lateral bimodal outflow condition, both in terms of sensing success rate and attraction success rate; (2) the fish swam mainly in the middle area of the lateral bimodal outflow condition, while the fish swam more evenly in the single-peak outflow condition. Therefore, setting the attraction current at the right time and near the entrance of the fish passage may help to improve the effect of fish attraction.

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“…Recovery from stress depends on the type, intensity, and duration of the stressor (Olla et al 1995;Zhang et al 2020). Recovery from transport stress can take hours (Iversen et al 1998) to weeks (Vieira Madureira et al 2019). Enrichment can, however, reduce the stress response of fish (Näslund et al 2013;Rosengren et al 2017;Zhang et al 2020) and time needed for recovery after stress in laboratory experiments.…”

Section: Discussionmentioning

confidence: 99%

Upstream and Downstream Dispersal Behavior of Hard‐ and Soft‐Released Juvenile Atlantic Salmon

Mokdad

Garner

Neff

et al. 2022

N American J Fish Manag

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Failure of reintroduction efforts of extirpated populations is thought to be linked to maladaptive behaviors exhibited by captive‐bred individuals in the environment where they are released. Soft‐release conditioning tactics attempt to reduce maladaptive behaviors by providing reintroduced animals an acclimatization period prior to release. We used implanted passive integrated transponder tags and antennae to monitor the spatial and temporal dispersal behavior of captive‐bred Atlantic Salmon Salmo salar that were acclimatized for 6 d prior to release (soft‐release), with fish that were directly released (hard‐release) into East Duffins Creek in Ajax, Ontario, Canada. In total, 232 of the 610 tagged fish (38%) dispersed from the release site. Downstream spatial dispersal did not differ significantly between the hard‐release (32%, n = 98 of 310) and soft‐release fish (30%, n = 91 of 300), but the hard‐release fish were significantly more likely to move upstream (11%) than were the soft‐release fish (3%). Timing of dispersal also significantly differed between the two groups: soft‐release fish were detected dispersing, on average, approximately 15 d earlier than hard‐release fish. These results suggest that soft‐release tactics do affect dispersal behavior, and the findings will be of particular interest to fisheries management agencies that are charged with improving the success for stocking salmonids as part of reintroduction efforts.

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Design of a multi-parametric profile for assessing the acclimation period of juvenile brown trout after an acute transport to new housing environment

Cited by 8 publications

References 57 publications

Knowledge of, and Attitudes towards, Live Fish Transport among Aquaculture Industry Stakeholders in China: A Qualitative Study

Knowledge of, and Attitudes towards, Live Fish Transport among Aquaculture Industry Stakeholders in China: A Qualitative Study

Laboratory Studies on the Rheotaxis of Fish under Different Attraction Flow Conditions

Upstream and Downstream Dispersal Behavior of Hard‐ and Soft‐Released Juvenile Atlantic Salmon

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