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Do the maximum sizes, ages and patterns of growth of three reef-dwelling labrid species at two latitudes differ in a manner conforming to the metabolic theory of ecology?
MedLine Citation:
PMID:  23130692     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The size and age data and patterns of growth of three abundant, reef-dwelling and protogynous labrid species (Coris auricularis, Notolabrus parilus and Ophthalmolepis lineolata) in waters off Perth at c. 32° S and in the warmer waters of the Jurien Bay Marine Park (JBMP) at c. 30° S on the lower west coast of Australia are compared. Using data for the top 10% of values and a randomization procedure, the maximum total length (L(T) ) and mass of each species and the maximum age of the first two species were estimated to be significantly greater off Perth than in the JBMP (all P < 0·001) and the maximum ages of O. lineolata in the two localities did not differ significantly (P > 0·05). These latitudinal trends, thus, typically conform to those frequently exhibited by fish species and the predictions of the metabolic theory of ecology (MTE). While, in terms of mass, the instantaneous growth rates of each species were similar at both latitudes during early life, they were greater at the higher latitude throughout the remainder and thus much of life, which is broadly consistent with the MTE. When expressed in terms of L(T) , however, instantaneous growth rates did not exhibit consistent latitudinal trends across all three species. The above trends with mass, together with those for reproductive variables, demonstrate that a greater amount of energy is directed into somatic growth and gonadal development by each of these species at the higher latitude. The consistency of the direction of the latitudinal trends for maximum body size and age and pattern of growth across all three species implies that each species is responding in a similar manner to differences between the environmental characteristics, such as temperature, at those two latitudes. The individual maximum L(T) , mass and age and pattern of growth of O. lineolata at a higher and thus cooler latitude on the eastern Australian coast are consistent with the latitudinal trends exhibited by those characteristics for this species in the two western Australian localities. The implications of using mass rather than length as the indicator variable when comparing the maximum sizes of the three species and the trends exhibited by the instantaneous growth rates of those species at different latitudes are explored. Although growth curves fitted to both the L(T) and masses at age for the males of each species lay above those for their females, this would not have influenced the conclusions drawn from common curves for both sexes.
Authors:
E Lek; D V Fairclough; N G Hall; S A Hesp; I C Potter
Publication Detail:
Type:  Journal Article     Date:  2012-09-27
Journal Detail:
Title:  Journal of fish biology     Volume:  81     ISSN:  1095-8649     ISO Abbreviation:  J. Fish Biol.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1936-62     Citation Subset:  IM    
Copyright Information:
© 2012 Murdoch University. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.
Affiliation:
Centre for Fish and Fisheries Research, School of Biological Sciences and Biotechnology, Murdoch University, South Street, Murdoch, WA 6150, Australia Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P. O. Box 20, North Beach, WA 6920, Australia.
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