Guarding against oversimplifying the fundamental drivers of southern elephant seal population dynamics

Vergani et al. (2008) examined the climatic drivers of population dynamics (weaning mass) and foraging performance (diet variation) from southern elephant seals, Mirounga leonina, in the Atlantic sector of the Southern Ocean. The principal conclusion was that elephant seal weaning masses were greate...

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Bibliographic Details
Published in:Journal of Biogeography
Main Authors: McMahon, CR, Field, IC, Hindell, MA, De Little, SC, Bradshaw, CJA
Format: Text
Language:English
Published: Wiley-Blackwell Publishing Ltd 2008
Subjects:
Environmental Sciences
Environmental Science and Management
Wildlife and Habitat Management
King George Island
Southern Ocean
Elephant Seal
Elephant Seals
Mirounga leonina
Southern Elephant Seal
Southern Elephant Seals
Online Access:https://doi.org/10.1111/j.1365-2699.2008.01938.x
http://ecite.utas.edu.au/55878
Description
Summary:Vergani et al. (2008) examined the climatic drivers of population dynamics (weaning mass) and foraging performance (diet variation) from southern elephant seals, Mirounga leonina, in the Atlantic sector of the Southern Ocean. The principal conclusion was that elephant seal weaning masses were greater in La Nin years, when higher ocean temperatures persisted in areas where most seals from the study population at King George Island forage. The authors infer that these conditions lead to improved prey quality and quantity; however, many of the questions and hypotheses they posed have already been addressed elsewhere in the Southern Ocean. We argue that substantial speculation and uncertainty could have been avoided by the authors had they consulted and examined this considerable available literature that confirms (and in some cases, fails to support) many of their conclusions. Such a spatially limited focus in biogeography increases the risk of making important errors of interpretation. 2008 The Authors.

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