Mass of weaned elephant seal pups in areas of low and high human presence

Engelhard, Georg H., van den Hoff, John, Broekman, Martijn, Baarspul, Antonie N. J., Field, Iain, Burton, Harry R. and Reijnders, Peter J. H. (2001) Mass of weaned elephant seal pups in areas of low and high human presence. Polar Biology, 24 (4). pp. 244-251. ISSN 0722-4060

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Abstract

On sub-Antarctic Macquarie Island, we examined pup weaning mass of southern elephant seals in relation to human presence. Pup weaning mass was previously found to be positively associated with 1st-year survivorship. Weaned pups were weighed in a remote area, Middle Beach, and in an area of relatively high human presence, Isthmus East. The areas were reasonably similar in beach topography, wind and surf conditions, numbers of seals present per kilometre of coastline, and numbers of males and females present in harems. For a sub-sample of measured pups, data on the respective maternal size were collected using photogrammetry. Both male and female weaned pups on Middle Beach were significantly heavier than those on Isthmus East. Estimated length of mothers was significantly higher on Middle Beach. In proportion to their own size, mothers in both areas produced weaners of similar mass, indicating no direct effect of human disturbance or the efficiency of lactation. It remained unclear whether the area differences in maternal and pup size were due to natural or human-related factors.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Related URLs:
Depositing User: Pure Connector
Date Deposited: 12 Nov 2014 16:56
Last Modified: 21 Apr 2020 23:34
URI: https://ueaeprints.uea.ac.uk/id/eprint/50802
DOI: 10.1007/s003000000204

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