Incorporating estuarine-angler behaviour and delayed blood sampling into the rapid assessment of catch-and release angling on the iconic dusky kob Argyrosomus japonicus

Catch‐and‐release (C&R) angling has grown in popularity due to increasing numbers of conservation‐minded anglers and regulations of recreational fisheries. C&R is often assumed to cause low mortality but can cause physiological and physical impairment. Fish metabolism and temperature interact to play a critical role in the biological functioning of fish. Understanding the relationship between temperature, fish metabolism, and physiological impairment is important for effective fisheries management and conservation, particularly for C&R angling in a changing thermal environment. We used respirometry to quantify post‐release metabolic stress and recovery of two popular Namibian angling species (Argyrosomus inodorus and A. coronus) subjected to simulated C&R angling across a range of temperatures. Metabolic stress and recovery time did not differ significantly between warm (A. coronus) and cold‐water (A. inodorus) species at any test temperature. However, several specimens of both species failed to recover physiologically and physically after 10 hours, thereby indicating C&R‐related impairment and potential for mortality. Given the predator‐rich environment of coastal waters in Namibia, best C&R practices are needed to minimise post‐release mortality.

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Physical injury, physiological stress, and behavior impairment of striped bass (Morone saxatilis) after catch‐and‐release by spin and fly angling

Griffin,

Hollema,

Kneebone

et al. 2024

Fisheries Management Eco

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The striped bass (Morone saxatilis) is one of the most important species for anglers along the Atlantic coast and a subject of intensive fisheries management. To promote best catch‐and‐release practices, understanding the physical and physiological consequences of angling is critical. We assessed the injury and stress of striped bass captured using rod and reel spin and fly tackle in a New England embayment. During 2010–2011, of 95 striped bass captured, only one died immediately after release. Behavioral impairment measured through reflex action mortality predictors increased when hooked in the gullet or gills. While 11.6% were critically hooked (in gills, gullet, or eyes), hooking severity was not related to terminal tackle (lure or fly). However, the most severely impaired were all hooked with J hooks. Physiological stress indicators (sodium, chloride, blood lactate) increased with longer fight times. Our results suggested that different components of an angling event drove physiological and behavioral responses.

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Incorporating estuarine-angler behaviour and delayed blood sampling into the rapid assessment of catch-and release angling on the iconic dusky kob Argyrosomus japonicus

Cited by 4 publications

References 51 publications

Preparing recreational fisheries for the uncertain future: An update of progress towards answering the 100 most pressing research questions

Preparing recreational fisheries for the uncertain future: An update of progress towards answering the 100 most pressing research questions

Effect of temperature on metabolic stress and recovery of two Argyrosomus species from simulated catch‐and‐release angling

Physical injury, physiological stress, and behavior impairment of striped bass (Morone saxatilis) after catch‐and‐release by spin and fly angling

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