Ecology and welfare of aquatic animals in wild capture fisheries

Diggles, B. K.; Cooke, Steven J.; Rose, James D.; Sawynok, W.

doi:10.1007/s11160-011-9206-x

Cited by 58 publications

(47 citation statements)

References 184 publications

(320 reference statements)

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“…Davis 2002, Cooke et al 2013b) and reflex (e.g. Davis 2010) endpoints serve as objective indicators of animal welfare in fisheries (Diggles et al 2011, Cooke et al 2013b) and can be used to inform conservation actions (Wikelski & Cooke 2006, Seebacher & Franklin 2012 given their utility in defining cause and effect relationships and elucidating mechanisms of mortality (Cooke & O'Connor 2010, Cooke et al 2013a. By determining how species respond to forced submergence associated with incidental capture, we can assist managers in the development of successful and sustainable bycatch reduction strategies.…”

Section: A P (C O N T R O L) M a P (T R E A T M E N T ) M A Le (C Omentioning

confidence: 99%

“…Given that most endangered species legislations extend beyond mortality to include sublethal disturbances (e.g. 'harm' and 'harassment' are forbidden by the Canadian Species at Risk Act), efforts to document physiological and behavioural impairments could provide an objective means of evaluating consequences of different types of fisheries activities while also providing information on animal welfare (Diggles et al 2011 …”

Section: A P (C O N T R O L) M a P (T R E A T M E N T ) M A Le (C Omentioning

confidence: 99%

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Physiological disturbances and behavioural impairment associated with the incidental capture of freshwater turtles in a commercial fyke-net fishery

Stoot¹,

Cairns²,

Blouin‐Demers³

et al. 2013

Endang. Species. Res.

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Turtles are caught as bycatch in commercial fisheries in both inland and marine waters. Turtle mortality associated with bycatch is concerning, as life-history characteristics of turtles, including high juvenile mortality and delayed sexual maturity, make them particularly susceptible to population declines following small increases in adult mortality. In eastern Ontario, Canada, freshwater turtles are encountered as bycatch in an inland commercial fyke-net fishery. Although some temperate turtle species can tolerate prolonged submergence, their ability to withstand submergence decreases as water temperatures increase such that turtles may experience severe physiological disturbances and mortality following prolonged forced submergence. The purpose of our study was to evaluate the sublethal physiological consequences and related behavioural impairments associated with fyke-net capture for 3 species of freshwater turtles (eastern musk turtle Sternotherus odoratus, northern map turtle Graptemys geographica and painted turtle Chrysemys picta). Individuals that were entrapped for 3 h at elevated water temperatures (23 to 29°C) displayed considerably higher blood lactate and lower blood pH compared to freeliving individuals. This trend was consistent across species and sexes. Despite having the largest increase in blood lactate, musk turtles did not exhibit behavioural impairment from entrapment, whereas both map and painted turtles displayed low responsiveness to behavioural assessments following entrapment. Our results suggest that sub-lethal responses can be used to identify potential harm or fitness impacts even in the absence of immediate mortality. Assessment of behavioural impairments, which could compromise activity and potentially result in post-release mortality, is important for protected and at-risk species that exhibit high juvenile mortality and delayed sexual maturity.

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Section: A P (C O N T R O L) M a P (T R E A T M E N T ) M A Le (C Omentioning

confidence: 99%

Section: A P (C O N T R O L) M a P (T R E A T M E N T ) M A Le (C Omentioning

confidence: 99%

Physiological disturbances and behavioural impairment associated with the incidental capture of freshwater turtles in a commercial fyke-net fishery

Stoot¹,

Cairns²,

Blouin‐Demers³

et al. 2013

Endang. Species. Res.

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“…Conservation initiatives arising from biotelemetry-based research could require buy-in from First 08p5 Nations groups to succeed, especially if changes to fishing practices are involved. Of interest in this study was the fact that the stakeholders had such concern for the welfare of tagged fish (Diggles et al, 2011), which emphasizes the need to ensure that tagging techniques are validated and done in a manner that maintains the welfare status of tagged fish. This perspective is in line with that of the research team because maximizing fish welfare is conducive to minimizing handling/tagging effects, an inherent objective of any tagging study .…”

Section: Mots-clésmentioning

confidence: 99%

Aboriginal fisher perspectives on use of biotelemetry technology to study adult Pacific salmon

Nguyen

Raby

Hinch

et al. 2012

Knowl. Managt. Aquatic Ecosyst.

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Key-words:telemetry science, aboriginal fisher, radio-tracking, tagging, fisher attitude Biotelemetry has become a popular tool accepted by the scientific community as a reliable approach for studying wild fish. However, stakeholder perspectives on scientific techniques and the information they generate are not uniformly positive. Aboriginal groups in particular may have opposition or apprehension to telemetry as a research tool. To that end, we conducted a river-bank survey of 111 aboriginal First Nations fishers that target adult Pacific salmon in the lower Fraser River, British Columbia, Canada. The majority of respondents had heard of telemetry, but few had knowledge of its function. Most responses regarding the use of telemetry in fisheries science were positive. The few negative perspectives were primarily concerned about the effects of tagging procedures whereas positive perspectives arose because telemetry was perceived to generate information on migration patterns and survival. Over half of the respondents would trust data arising from telemetry studies, but some had conditions related to the group conducting the research and their experience with fish handling. Several respondents noted the need for additional consultation and outreach with aboriginal communities (especially fishers) to better inform them of study questions and techniques which, in the case of telemetry studies, could promote better participation in tag return programs and uptake of knowledge emanating from use of telemetry. RÉSUMÉPoints de vue des pêcheurs autochtones sur l'utilisation des technologies de biotélémétrie pour l'étude du saumon du Pacifique adulte Mots-clés :télémétrie, pêcheurs autochtones, radio-pistage, marquage, attitude des pêcheurs La biotélémétrie est devenue un outil courant accepté par la communauté scientifique comme une approche fiable pour l'étude des poissons sauvages. Toutefois, les perspectives des parties prenantes sur les techniques scientifiques et les informations qu'elles génèrent ne sont pas uniformément positives. Les groupes autochtones en particulier, peuvent avoir une opposition ou une appréhension à la télémétrie comme outil de recherche. À cette fin, nous avons mené une enquête sur le terrain auprès de 111 pêcheurs autochtones des « Premières nations » qui pêchent les adultes de saumon du Pacifique dans la partie inférieure du fleuve Fraser, en Colombie-Britannique, Canada. La majorité des répondants avaient entendu parler de la télémétrie, mais peu avaient connaissance de sa fonction. La plupart des réponses concernant l'utilisation de la télémétrie dans les sciences halieutiques étaient positives. Les quelques réponses négatives étaient rares principalement préoccupées par les effets des procédures de marquage alors que des points de vue positifs ressortaient parce que la télémétrie a été perçue comme source d'informations sur les schémas de migration et de survie. Plus de la moitié des personnes interrogées feraient confiance à des données provenant d'études de télémétrie, mais cert...

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“…Concerns about the welfare of production animals have extended from farm animals to fish in aquaculture and capture fisheries (Diggles et al, 2011, Huntingford et al, 2006. Huntingford et al (2006) reviewed the scientific literature on fish welfare and identified welfare issues that arise in aquaculture, recreational fisheries and ornamental fish keeping, but they did not identify the welfare issues that arise in capture fisheries other than pointing out that "there is very little information on the welfare of fish in the context of commercial fisheries" (Huntingford et al, 2006: 362).…”

Section: Introductionmentioning

confidence: 99%

“…Ashley et al, 2006, Sneddon et al, 2003, there is still debate whether or not fish can consciously experience noxious stimuli. Chandroo et al (2004b), Huntingford et al (2006) and Braithwaite (2010), among others, advocate a focus on the welfare of individual fish based on the perspective that fish can consciously experience noxious stimuli, whereas Diggles et al (2011), Rose et al (2014) and Key (2014), among others, dismiss this perspective and advocate a focus on fish welfare from a population perspective, aimed at reducing mortality (which relates to fish welfare) due to fishing (Diggles et al, 2011, Rose et al, 2014. Despite the debate whether or not fish can consciously experience noxious stimuli, fish welfare is increasingly acknowledged to be an important issue (Arlinghaus et al, 2007, Braithwaite and Boulcott, 2008, Branson, 2008.…”

Section: Introductionmentioning

confidence: 99%

Understanding social sustainability of capture fisheries

Boer¹,

Berentsen²,

Bokkers³

et al.

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Fishing companies are faced with decreasing profitability and increasing competition. These companies can try to gain a competitive advantage by differentiating their products, e.g. by marketing new product attributes that consumers are interested in such as attributes relating to sustainability. Although consumers could be considerably interested in social sustainability of fish, this sustainability dimension has received little research interest so far. The main objective of this thesis is to understand social sustainability of capture fisheries. Social sustainability can be understood by applying the framework for social sustainability assessment, which consists of stakeholder consultation and issue selection, indicator development and quantification, and interpretation of the results, to the case considered. The case considered in this thesis was capture fisheries in the northeast Atlantic. Stakeholder consultation resulted in the identification of 27 social sustainability issues relevant for capture fisheries in the northeast Atlantic. Overall, social sustainability issues concerning working conditions, employees' job fulfilment and fish welfare were seen as more important than other social sustainability issues. Indicators were defined for the most important social sustainability issues of capture fisheries in the northeast Atlantic. To interpret values for each indicator, rubrics were developed that articulated levels of performance. Application of these indicators and their accompanying rubrics to a Norwegian trawler demonstrated that the indicators and rubrics provide insight into social sustainability at the level of the vessel, which can be used to identify potential room for improvement. To determine whether social sustainability issues can be used for product differentiation, consumer interest in social sustainability issues of whitefish from the northeast Atlantic was studied. Results from a choice modelling survey demonstrated that consumers prefer the issue fish welfare over the issues product quality, worker safety and local employment. Given the lack of overview of the knowledge on fish welfare, the most important social sustainability issue for consumers, the literature on this topic was reviewed to determine how the capture process in capture fisheries affects fish welfare, using the indicators external injuries and mortality. This review showed that scale, skin and fin injuries occur more frequently in trawls, purse seines, gillnets, traps and seines than in hooks, whereas hooking injuries occur in hooks only. Pressure injuries can occur in all gear types when deployed at greater depth. Trawls, purse seines and seines result in higher mortality than gillnets, hooks and traps. Mortality appears to increase with decreasing fish length, and differs across fish species. A greater capture depth and a longer fishing duration were associated with more external injuries and higher mortality, whereas a large change in water temperature, a longer duration of air exposure and a high density in ...

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Ecology and welfare of aquatic animals in wild capture fisheries

Abstract: The expansion of commercial aquaculture production has raised awareness of issues relating to

Cited by 58 publications

References 184 publications

Physiological disturbances and behavioural impairment associated with the incidental capture of freshwater turtles in a commercial fyke-net fishery

Physiological disturbances and behavioural impairment associated with the incidental capture of freshwater turtles in a commercial fyke-net fishery

Aboriginal fisher perspectives on use of biotelemetry technology to study adult Pacific salmon

Understanding social sustainability of capture fisheries

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