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Effectiveness of the Air Stripping in Two Salmonid Fish, Rainbow Trout Oncorhynchus Mykiss and Brown Trout Salmo Trutta Morpha fario
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Does pre-spawning catch and release angling affect offspring telomere dynamics in Atlantic salmon?

Eleanor Duncan1, Magdalene Papatheodoulou1, Neil B Metcalfe1

  • 1School of Biodiversity, One Health and Veterinary Medicine, Graham Kerr Building, University of Glasgow, G12 8QQ Glasgow, UK.

Conservation Physiology
|April 28, 2023
PubMed
Summary

Catch and release (C&R) angling stress in parent salmon did not affect offspring telomere length, suggesting minimal intergenerational impact. However, refining C&R practices remains crucial for fish population health.

Keywords:
Conservation biologyfishfishingsenescencestresswelfare

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Area of Science:

  • * Ecology and Evolutionary Biology
  • * Fisheries Science
  • * Animal Physiology

Background:

  • * Catch and release (C&R) angling balances conservation and recreation but can stress fish.
  • * The long-term conservation success of C&R depends on offspring survival and health.
  • * Intergenerational effects of angling stress on fish fitness are not well understood.

Purpose of the Study:

  • * To test if parental stress from C&R angling affects offspring telomere length.
  • * To investigate potential intergenerational impacts of C&R angling on salmon fitness.

Main Methods:

  • * Wild adult salmon were subjected to simulated C&R angling (exercise with/without air exposure) or left as controls.
  • * Telomere length of offspring (larval stage) was measured.
  • * Relationship between parental C&R experience, offspring telomere length, and growth rate was analyzed.

Main Results:

  • * Offspring telomere length was positively related to growth rate.
  • * Parental C&R angling experience did not significantly affect offspring telomere length.
  • * Telomere elongation during early development may buffer parental stress effects.

Conclusions:

  • * C&R angling may have minimal direct intergenerational effects on offspring telomere length.
  • * Further research is needed to fully understand C&R impacts on fish populations.
  • * Mitigation and refinement of C&R angling practices are still recommended to minimize harm.