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

Clive McMahon, Iain Field, M HINDELL, S Delittle, Corey Bradshaw

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    Abstract

    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�ears, 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.
    Original languageEnglish
    Pages (from-to)1738-1740
    Number of pages3
    JournalJournal of Biogeography
    Volume35
    Issue number9
    Publication statusPublished - 2008

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    McMahon, C., Field, I., HINDELL, M., Delittle, S., & Bradshaw, C. (2008). Guarding against oversimplifying the fundamental drivers of southern elephant seal population dynamics. Journal of Biogeography, 35(9), 1738-1740.