Pubblicazione scientifica

Chill out: physiological responses to winter ice-angling in two temperate freshwater fishes

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e cattura
produzione e raccolta
trasformazione e commercializzazione

RIASSUNTO

Abstract

A large body of research has documented the stress response of fish following angling capture. Nearly all of these studies have taken place during the open-water season, with almost no work focused on the effects of capture in the winter via ice angling. We therefore conducted a study to examine physiological disturbance and reflex impairment following capture by ice-angling in two commonly targeted species, bluegill Lepomis macrochirus and yellow perch Perca flavescens. Fish were captured from a lake in eastern Wisconsin (USA) and sampled either immediately or after being held in tanks for 0.5, 2 or 4 h. Sampling involved the assessment of reflex action mortality predictors (RAMP) and a blood biopsy that was used to measure concentrations of plasma cortisol and lactate. The capture-induced increase in plasma cortisol concentration was delayed relative to responses documented in previous experiments conducted in the summer and reached a relative high point at 4 h post-capture. Reflex impairment was highest at the first post-capture time point (0.5 h) and declined with each successive sampling (2 and 4 h) during recovery. Bluegill showed a higher magnitude stress response than yellow perch in terms of plasma cortisol and RAMP scores, but not when comparing plasma lactate. Overall, these data show that ice-angling induces a comparatively mild stress response relative to that found in previous studies of angled fish. While recovery of plasma stress indicators does not occur within 4 h, declining RAMP scores demonstrate that ice-angled bluegill and yellow perch do recover vitality following capture.

DATA

Data di pubblicazione: 27/04/2017

AUTORI

LOUISON MICHAEL J
HASLER CALEB T
RABY GRAHAM D
SUSKI CORY D
STEIN JEFFREY A

ENTE DI AFFERENZA

ILLINOIS NATURAL HISTORY SURVEY
DEPT NATURAL RESOURCES & ENVIRONMENTAL SCIENCES UNIV ILLINOIS AT URBANA CHAMPAIGN
GREAT LAKES INST ENVIRONMENTAL RSCH UNIV WINDSOR

RIVISTA

Conservation Physiology, 5(1), cox027

IMPACT FACTOR

3,150

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