Population-specific locomotor phenotypes are displayed by barramundi, Lates calcarifer, in response to thermal stress

Edmunds, Richard C., Van Herwerden, Lynne, and Fulton, Christopher J. (2010) Population-specific locomotor phenotypes are displayed by barramundi, Lates calcarifer, in response to thermal stress. Canadian Journal of Fisheries and Aquatic Sciences, 67 (7). pp. 1068-1074.

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Abstract

We investigated how thermal stress may alter the locomotor phenotype of barramundi, Lates calcarifer, from genetically distinct northern (low latitude) and southern (high latitude) populations in tropical Australia. Following early growth and development under native (25 °C and 30 °C) and non-native (20 °C and 35 °C) temperatures, we observed distinct differences in the swimming performance of northern and southern individuals that were consistent with expectations based on local thermal adaptation. Southern population fish exhibited significantly faster swimming speeds (32.10 ± 0.33 cm·s^–1, mass-adjusted mean ± 95% confidence limit) than their northern counterparts (28.58 ± 0.64 cm·s^–1) under cold-stress (20 °C) conditions. Conversely, northern population fish performed significantly better (51.63 ± 2.1 cm·s^–1) than their southern counterparts (44.18 ± 3.11 cm·s^–1) under heat-stress (35 °C) conditions. We conclude that L. calcarifer display locomotor phenotypes thermally adapted to their local environment, with early growth under non-native temperatures leading to significantly reduced phenotypic fitness.

Item ID: 11838
Item Type: Article (Refereed Research - C1)
Keywords: marine science
ISSN: 1205-7533
Date Deposited: 01 Sep 2010 03:15
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060303 Biological Adaptation @ 50%
06 BIOLOGICAL SCIENCES > 0604 Genetics > 060411 Population, Ecological and Evolutionary Genetics @ 50%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 50%
83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8305 Primary Animal Products > 830503 Live Animals @ 50%
Citation Count from Web of Science Web of Science 2
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