By R. M. Laws
This ebook describes the equipment and approaches for box stories of the inhabitants ecology of seals which will assemble uncomplicated medical info and to help in conservation efforts. The papers during this booklet make particular innovations for estimating inhabitants sizes, for learning their habit on land and at sea, and for immobilizing, shooting, marking, and, the place worthwhile, humanely killing seals for you to learn body structure, vitamin, bioenergetics, and make age determinations.
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Additional resources for Antarctic Seals: Research Methods and Techniques
13. 5. Large claws on fore flippers. Coarse single hair coat. No obvious neck. Teeth not lobed. 5 m, 4000 kg (male). Elephant seal (Mirounga leonina) Figs. 3 Identification of species 6. Profile lithe and streamlined with flanks tailing off. (a) Profile plump, barrel-shaped. 7. Very large head and thorax; distinct neck. Dark and light spots overall (a) Head moderate size; coat mainly silver-grey or cream with reticulated markings mainly on shoulders and near tail; snout upturned. Often scarred on flanks and belly with long parallel stripes.
Recognition of such patterns does, however, require considerable experience. Notes on identification are given in chapter 1. The distinction between individual seals and groups should be agreed at the beginning of the survey. It is recommended that all seals within 20 m of each other on one floe should be considered as a group. All those lying on one small floe should be considered as the same group, while on large floes judgement is required. However, this seldom produces problems as most animals in a group are usually within a few metres of each other.
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. A. tropicalis is smaller than A. gazella. Colour Back and sides grey to brownish, depending on length of time ashore; throat and breast creamy; belly dark gingery colour. Adult male has heavy mane round neck, shoulder and on breast - grizzled appearance due to white hairs. M. Laws Fig. 12 Antarctic fur seal characteristic attitudes.