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Type: Journal article
Title: Coral-reef fishes can become more risk-averse at their poleward range limits
Author: Coni, E.O.C.
Booth, D.J.
Nagelkerken, I.
Citation: Proceedings of the Royal Society B: Biological Sciences, 2022; 289(1971):20212676-1-20212676-8
Publisher: Royal Society, The
Issue Date: 2022
ISSN: 0962-8452
Statement of
Ericka O. C. Coni, David J. Booth, and Ivan Nagelkerken
Abstract: As climate warms, tropical species are expanding their distribution to temperate ecosystems where they are confronted with novel predators and habitats. Predation strongly regulates ecological communities, and range-extending species that adopt an effective antipredator strategy have a higher likelihood to persist in non-native environments.Here,we test this hypothesis by comparing various proxies of antipredator and other fitness-related behaviours between range-extending tropical fishes and native-temperate fishes at multiple sites across a 730 km latitudinal range. Although some behavioural proxies of risk aversion remained unaltered for individual tropical fish species, in general they became more risk-averse (increased sheltering and/or flight initiation distance), and their activity level decreased poleward. Nevertheless, they did not experience a decline in body condition or feeding rate in their temperate ranges. Temperate fishes did not show a consistently altered pattern in their behaviours across range locations, even though one species increased its flight initiation distance at the warm-temperate location and another one had lowest activity levels at the coldest range location. The maintenance of feeding and bite rate combined with a decreased activity level and increased sheltering may be behavioural strategies adopted by range-extending tropical fishes, to preserve energy and maintain fitness in their novel temperate ecosystems.
Keywords: species redistributions
tropical vagrant fish
ocean warming
behavioural trade-offs
Rights: © 2022 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited.
DOI: 10.1098/rspb.2021.2676
Grant ID:
Appears in Collections:Ecology, Evolution and Landscape Science publications

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