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From gametogenesis to spawning: how climate-driven warming affects teleost reproductive biology

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Alix, M, Kjesbu, OS and Anderson, KC ORCID: 0000-0001-7749-4641 2020 , 'From gametogenesis to spawning: how climate-driven warming affects teleost reproductive biology' , Journal of Fish Biology , pp. 1-77 , doi: 10.1111/jfb.14439.

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Abstract

Ambient temperature modulates reproductive processes, especially in poikilotherms such as teleosts. Consequently, global warming is expected to impact the reproductive function of fish, which has implications for wild population dynamics, fisheries, and aquaculture. In this extensive review spanning tropical and cold‐water environments, we examine the impact of higher‐than‐optimal temperatures on teleost reproductive development and physiology across reproductive stages, species, generations, and sexes. In doing so, we demonstrate that warmer‐than‐optimal temperatures can affect every stage of reproductive development from puberty through to the act of spawning, and these responses are mediated by age at spawning and are associated with changes in physiology at multiple levels of the brain‐pituitary‐gonad axis. Response to temperature is often species‐specific, and changes with environmental history/transgenerational conditioning, and the amplitude, timing, and duration of thermal exposure within a generation. Thermally‐driven changes to physiology, gamete development and maturation typically culminate in poor sperm and oocyte quality, and/or advancement/delay/inhibition of ovulation/spermiation and spawning. Although the field of teleost reproduction and temperature is advanced in many respects, we identify areas where research is lacking, especially for males and egg quality from “omics” perspectives. Climate‐driven warming will continue to disturb teleost reproductive performance and therefore guide future research, especially in the emerging areas of transgenerational acclimation and epigenetic studies, which will help to understand and project climate change impacts on wild populations and could also have implications for aquaculture.

Item Type: Article
Authors/Creators:Alix, M and Kjesbu, OS and Anderson, KC
Keywords: fish biology, cod, fisheries management, spawning, fish reproduction, climate change, temperature, gametogenesis
Journal or Publication Title: Journal of Fish Biology
Publisher: Blackwell Publishing Ltd
ISSN: 0022-1112
DOI / ID Number: 10.1111/jfb.14439
Copyright Information:

Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

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