Consumption of Valuable Food Fish Species by Baikal Seal (Pusa Sibirica Gm., Phochidae, Pinnipedia)
E. A. Petrov, O. G. Smirnova, V. V. Tkachev
Pages: 639–651
Abstract
Measurements of the length of otoliths extracted directly from salmon-like fish (SF), which are a component of the diet of Baikal seal (Pusa sibirica Gm.), and from the alimentary tract of the animals were carried out. It was calculated on the basis of the analysis of the content (otoliths) of the alimentary tract of seal and the obtained regression equations that the modern population of seal annually consumes ~ 9,3 mln of SF individuals mainly of the medium size for the species. The biomass of consumed fish is estimated to be 1772 t/year (lim 1393
|
