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PLoS ONE
- Source :
- PLoS ONE, PLoS ONE, Vol 16, Iss 11, p e0252359 (2021)
- Publication Year :
- 2021
- Publisher :
- Public Library of Science, 2021.
-
Abstract
- 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. Funding for the field work was provided by the National Science Foundation grant ANT 1341602 to Dr. Elizabeth L. Crockett (Ohio University, USA). Acquisition of equipment for behavioral experiments and all other activities throughout the study including the time and effort of Drs. Ismailov, Scharping and Friedlander were supported by the Fralin Biomedical Research Institute at VTC operational funds. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Published version
- Subjects :
- Fish Biology
Physiology
Science
Climate Change
Social Sciences
Antarctic Regions
Water Chemistry
Geographical Locations
Hemoglobins
Aquatic Respiration
Fish Physiology
Animal Physiology
Psychology
Animals
Environmental Chemistry
Environmental planning
Swimming
Ecosystem
Behavior
Multidisciplinary
Animal Behavior
Biological Locomotion
Respiration
Ecology and Environmental Sciences
Organisms
Fishes
Temperature
Biology and Life Sciences
Eukaryota
Vertebrate Physiology
Chemistry
Fish
Vertebrates
People and Places
Physical Sciences
Medicine
Antarctica
Physiological Processes
Zoology
Aquatic Hypoxia
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 16
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....dbf76aa73411e9e15956516df6ed7df9