Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.

Recent studies forecast that many ectothermic animals, especially aquatic stenotherms, may not be able to thrive or even survive predicted climate change. These projections, however, generally do not call much attention to the role of behavior, an essential thermoregulatory mechanism of many ectothe...

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Autores principales:	Iskander I Ismailov, Jordan B Scharping, Iraida E Andreeva, Michael J Friedlander
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/706daea4dd274c999b20e25a18c8473b
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spelling	oai:doaj.org-article:706daea4dd274c999b20e25a18c8473b2021-12-02T20:16:10ZAntarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.1932-620310.1371/journal.pone.0252359https://doaj.org/article/706daea4dd274c999b20e25a18c8473b2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0252359https://doaj.org/toc/1932-6203Recent studies forecast that many ectothermic animals, especially aquatic stenotherms, may not be able to thrive or even survive predicted climate change. These projections, however, generally do not call much attention to the role of behavior, an essential thermoregulatory mechanism of many ectotherms. Here we characterize species-specific locomotor and respiratory responses to acute ambient warming in two highly stenothermic Antarctic Notothenioid fishes, one of which (Chaenocephalus aceratus) lacks hemoglobin and appears to be less tolerant to thermal stress as compared to the other (Notothenia coriiceps), which expresses hemoglobin. At the onset of ambient warming, both species perform distinct locomotor maneuvers that appear to include avoidance reactions. In response to unavoidable progressive hyperthermia, fishes demonstrate a range of species-specific maneuvers, all of which appear to provide some mitigation of the deleterious effects of obligatory thermoconformation and to compensate for increasing metabolic demand by enhancing the efficacy of branchial respiration. As temperature continues to rise, Chaenocephalus aceratus supplements these behaviors with intensive pectoral fin fanning which may facilitate cutaneous respiration through its scaleless integument, and Notothenia coriiceps manifests respiratory-locomotor coupling during repetitive startle-like maneuvers which may further augment gill ventilation. The latter behaviors, found only in Notothenia coriiceps, have highly stereotyped appearance resembling Fixed Action Pattern sequences. Altogether, this behavioral flexibility could contribute to the reduction of the detrimental effects of acute thermal stress within a limited thermal range. In an ecologically relevant setting, this may enable efficient thermoregulation of fishes by habitat selection, thus facilitating their resilience in persistent environmental change.Iskander I IsmailovJordan B ScharpingIraida E AndreevaMichael J FriedlanderPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 11, p e0252359 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Iskander I Ismailov Jordan B Scharping Iraida E Andreeva Michael J Friedlander Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
description	Recent studies forecast that many ectothermic animals, especially aquatic stenotherms, may not be able to thrive or even survive predicted climate change. These projections, however, generally do not call much attention to the role of behavior, an essential thermoregulatory mechanism of many ectotherms. Here we characterize species-specific locomotor and respiratory responses to acute ambient warming in two highly stenothermic Antarctic Notothenioid fishes, one of which (Chaenocephalus aceratus) lacks hemoglobin and appears to be less tolerant to thermal stress as compared to the other (Notothenia coriiceps), which expresses hemoglobin. At the onset of ambient warming, both species perform distinct locomotor maneuvers that appear to include avoidance reactions. In response to unavoidable progressive hyperthermia, fishes demonstrate a range of species-specific maneuvers, all of which appear to provide some mitigation of the deleterious effects of obligatory thermoconformation and to compensate for increasing metabolic demand by enhancing the efficacy of branchial respiration. As temperature continues to rise, Chaenocephalus aceratus supplements these behaviors with intensive pectoral fin fanning which may facilitate cutaneous respiration through its scaleless integument, and Notothenia coriiceps manifests respiratory-locomotor coupling during repetitive startle-like maneuvers which may further augment gill ventilation. The latter behaviors, found only in Notothenia coriiceps, have highly stereotyped appearance resembling Fixed Action Pattern sequences. Altogether, this behavioral flexibility could contribute to the reduction of the detrimental effects of acute thermal stress within a limited thermal range. In an ecologically relevant setting, this may enable efficient thermoregulation of fishes by habitat selection, thus facilitating their resilience in persistent environmental change.
format	article
author	Iskander I Ismailov Jordan B Scharping Iraida E Andreeva Michael J Friedlander
author_facet	Iskander I Ismailov Jordan B Scharping Iraida E Andreeva Michael J Friedlander
author_sort	Iskander I Ismailov
title	Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
title_short	Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
title_full	Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
title_fullStr	Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
title_full_unstemmed	Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
title_sort	antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/706daea4dd274c999b20e25a18c8473b
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Antarctic teleosts with and without hemoglobin behaviorally mitigate deleterious effects of acute environmental warming.

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