Thermoregulation in fish

Thermoregulation is critical for survival and animals therefore employ strategies to keep their body temperature within a physiological range. As ectotherms, fish exclusively rely on behavioral strategies for thermoregulation. Different species of fish seek out their specific optimal temperatures th...

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Bibliographic Details
Published inMolecular and cellular endocrinology Vol. 518; p. 110986
Main Author Haesemeyer, Martin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2020
Subjects
Behavior
body temperature
Circuit
Danio rerio
ectothermy
endocrinology
Ethology
Fish
sensation
sensory receptors
Thermoregulation
vigor
water temperature
Zebrafish
Thermoregulation
Ethology
Fish
Zebrafish
Circuit
Behavior
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Summary:Thermoregulation is critical for survival and animals therefore employ strategies to keep their body temperature within a physiological range. As ectotherms, fish exclusively rely on behavioral strategies for thermoregulation. Different species of fish seek out their specific optimal temperatures through thermal navigation by biasing behavioral output based on experienced environmental temperatures. Like other vertebrates, fish sense water temperature using thermoreceptors in trigeminal and dorsal root ganglia neurons that innervate the skin. Recent research in larval zebrafish has revealed how neural circuits subsequently transform this sensation of temperature into thermoregulatory behaviors. Across fish species, thermoregulatory strategies rely on a modulation of swim vigor based on current temperature and a modulation of turning based on temperature change. Interestingly, temperature preferences are not fixed but depend on other environmental cues and internal states. The following review is intended as an overview on the current knowledge as well as open questions in fish thermoregulation. •As ectothermic animals fish exclusively rely on behavior for thermoregulation.•Temperature preferences vary widely across fish species but strategies are conserved.•Temperature modulates swim speed and temperature change modulates turning.•Zebrafish research identified the neural substrate and logic of thermoregulation.•Comparing among phyla reveals convergent and divergent principles of thermoregulation.
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ISSN:0303-7207
1872-8057
1872-8057
DOI:10.1016/j.mce.2020.110986