Плодовитость камчатского краба Paralithodes camtchaticus (Tilesius) аяно-шантарской популяции

• Main Authors: Черниенко, Игорь, Овсянников, Владимир
• Format: Text
• Language: unknown
• Published: Федеральное государственное унитарное предприятие «Тихоокеанский научно-исследовательский рыбохозяйственный центр» 2009
• Subjects: КАМЧАТСКИЙ КРАБ; ИНДИВИДУАЛЬНАЯ АБСОЛЮТНАЯ ПЛОДОВИТОСТЬ; ПОПУЛЯЦИОННАЯ АБСОЛЮТНАЯ ПЛОДОВИТОСТЬ; Okhotsk; okhotsk sea; Red king crab
• Online Access: http://cyberleninka.ru/article/n/plodovitost-kamchatskogo-kraba-paralithodes-camtchaticus-tilesius-ayano-shantarskoy-populyatsii; http://cyberleninka.ru/article_covers/2688913.png

Условия обитания аяно-шантарской популяции камчатского краба накладывают специфический отпечаток на ее морфологические и физиологические особенности. В связи с этим как с теоретической, так и с практической точек зрения представляют особый интерес такие важные характеристики, как его индивидуальная и популяционная плодовитости. Сложившаяся в 2008 г. промысловая обстановка способствовала объективной оценке численности самок на большей части акватории основного репродуктивного района. На основе данных, собранных ТИНРО-центром и ХфТИНРО в 2000-2008 гг., оценены зависимость индивидуальной абсолютной плодовитости (ИАП) от размеров, а также популяционная плодовитость аяно-шантарской популяции камчатского краба и средняя ИАП. Individual and population fecundity of red king crab is investigated for its Ayan-Shantar population (Okhotsk Sea) that is distinguished by severe conditions of the habitat and therefore by slow growth. The individual absolute fecundity (IAF) is assessed by Ivankov method, with the 200-300 mg samples. IAF is compared with size of females using the dispersion analysis; the fecundity dependence on size is approximated by linear regression. However, IAF doesn't depend on maturity of females. To assess the population fecundity, number of females is estimated as N = V/(S. q), where V the volume under the surface describing spatial distribution of CPUE interpolated by kriging method; S = 6430 m2 the square of one trap recovery; q = 0.25 the coefficient of catchability. For a case of fragmentary survey, as in the 2008 when the most of samples were collected far southward and far northward from Nogdar-Negotny peninsula in the sites with relatively larger females, possible bias is corrected by the following way: spatial distributions of females number per a trap and their eggs number are restored by kriging method; total number of eggs is calculated; and the average IAF is estimated dividing the total number of eggs by the total number of females. In 2008, the total number of females in the whole population was estimated as 14.2. 106 sp., and the population fecundity as 5.1. 1011 eggs, so the average IAP was 36,000 eggs/female that was considerably lower than the average IAP within the limits of surveyed area (37,500 eggs/female). In spite of relatively low individual absolute fecundity of the red king crabs from the Ayan-Shantar population, the population fecundity is significant in comparison with the fecundity of other populations of this species.