Download e-book for kindle: Antarctic Seals: Research Methods and Techniques by R. M. Laws

By R. M. Laws

ISBN-10: 0511565283

ISBN-13: 9780511565281

ISBN-10: 0521111765

ISBN-13: 9780521111768

ISBN-10: 0521443024

ISBN-13: 9780521443029

This publication describes the tools and systems for box experiences of the inhabitants ecology of seals that allows you to assemble easy medical info and to help in conservation efforts. The papers during this booklet make particular strategies for estimating inhabitants sizes, for learning their habit on land and at sea, and for immobilizing, taking pictures, marking, and, the place important, humanely killing seals so one can research body structure, nutrition, bioenergetics, and make age determinations.

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Extra info for Antarctic Seals: Research Methods and Techniques

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Field characters for A. gazella are given below with an indication of ways in which A. tropicalis differs. Profile Snout pointed. Small head, long neck, large fore flippers and 'shoulder' placed further back than in true seals; hind flippers elongated and can be turned forward. Can assume quadrupedal form. Smaller than true seals. Bulls have thickening of neck and shoulders due to presence of a mane. 5 kg. Adult: male length to 200 cm; weight to 200 kg. female length to 145 cm; weight to 50 kg.

For example, McCann & Rothery (1988) used the top of the mast of a sailing boat to count elephant seals. In dense colonies it is often useful to mark 32 A. W. B. Siniff and J. Harwood animals which have been counted with a distinctive dye to ensure that they are not counted twice and to keep track of what parts of the colony have been censused. Where this is impractical, it is important that the observers do not take their eyes off the seals they are counting; this can be achieved by using hand tallies, small tape recorders or by assigning one member of a group of observers to record while the others count.

Teeth lightly stained. Clear sharp tones of vocalizations; growl like monosyllabic cough. Sub-Antarctic fur seal (Arctocephalus tropicalis) Fig. 14, (a) Adult chest grey to white, slight or no yellow tint. Adult male distinct grizzled or white head and back of neck. Long fore flippers; hind flippers long and awkward looking. No crest, but slight bunch of longer guard hairs between eyes. Ears obvious, long. Teeth heavily stained. Vocalizations nasal, sometimes wheezy; growl deep and reverbatory.

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Antarctic Seals: Research Methods and Techniques by R. M. Laws

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