Hematological indicators of stress in longline-captured sharks

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Heather MarshallDiego Bernal

Abstract

For many shark species, little information exists about the stress response to capture and release in commercial longline fisheries. Recent studies have used hematological profiling to assess the secondary stress response, but little is known about how, and to what degree, these indicators vary interspecifically. Moreover, there is little understanding of the extent to which the level of relative swimming activity (e.g., sluggish vs. active) or the general ecological classification (e.g., coastal vs. pelagic) correlates to the magnitude of the exercise-induced (capture-related) stress response. This study compared plasma electrolytes (Na(+), Cl(-), Mg(2+), Ca(2+), and K(+)), metabolites (glucose and lactate), blood hematocrit, and heat shock protein (Hsp70) levels between 11 species of longline-captured sharks (n=164). Statistical comparison of hematological parameters revealed species-specific differences in response to longline capture, as well as differences by ecological classification. Taken together, the blood properties of longline-captured sharks appear to be useful indicators of interspecific variation in the secondary stress response to capture, and may prove useful in the future for predicting survivorship of longlin...Continue Reading

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Citations

Jun 15, 2013·General and Comparative Endocrinology·C A Awruch
Feb 27, 2019·Stress : the International Journal on the Biology of Stress·Kady Lyons, Katherine E Wynne-Edwards
Dec 15, 2015·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Leonardo GuidaRichard D Reina
Jun 8, 2015·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Robyn J MacLellanSuzanne Currie
Nov 20, 2016·Journal of Fish Biology·J R EllisF Poisson
Dec 29, 2018·Conservation Physiology·Ian A BouyoucosJohn W Mandelman
Jan 29, 2021·Conservation Physiology·Bianca K ProhaskaR Dean Grubbs
Feb 25, 2021·Journal of Fish Biology·Valentina ScarponiWilliam Hughes

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