Питание равношипого краба Lithodes aequispinus, Benedict северо-западной части Охотского моря

• Main Author: Живоглядова, Л.
• Format: Text
• Language: unknown
• Published: Федеральное государственное унитарное предприятие «Тихоокеанский научно-исследовательский рыбохозяйственный центр» 2005
• Subjects: Benedict; Kashevarov Bank; Okhotsk; Golden King Crab; Lithodes aequispinus; okhotsk sea
• Online Access: http://cyberleninka.ru/article/n/pitanie-ravnoshipogo-kraba-lithodes-aequispinus-benedict-severo-zapadnoy-chasti-ohotskogo-morya; http://cyberleninka.ru/article_covers/5779314.png

Представлен качественный и количественный состав содержимого желудков равношипого краба восточного Сахалина и банки Кашеварова. Дана краткая характеристика распределения бентоса в указанных районах. Доминирующим типом фауны в этих районах обитания равношипого краба является фауна обрастаний. Из представителей данной фауны в желудках краба (размер карапакса по ширине 91148 мм) преобладают гидроиды, их доля от массы пищевого комка составляет 13,07 %. Доминирующим компонентом пищи по частоте встречаемости, частоте доминирования и массовой доле являются офиуры (соответственно 68,75, 62,50, 44,50 %). Значительную роль в питании краба играют полихеты, их доля от массы содержимого желудка 17,77 %. По типу питания равношипый краб отнесен к группе бентофагов.Food spectrum is described of the golden king crab Lithodes aequispinus Benedict from the northwestern Okhotsk Sea. This crab species is poorly studied so far as large depths and rocky ground (common habitat areas for the golden king crab) make difficult the sampling on its feeding. Periphyton is dominant fauna in the habitat area of the golden king crab. The peak of periphyton biomass and the main aggregations of the crab were found at Kashevarov Bank. Twenty specimens of golden king crab with carapaces from 91 to 185 mm were collected for the analysis of their feeding. All males had the third molting category, and females had embryos with dark eyes or empty egg cases to the pleopod setae. In total, eight taxonomic groups were found in stomachs of the crabs. Ophiuras dominated by all indices (44 % by the weight of stomach content, 69 % by frequency of revealing, and 62 % by cases of domination). Taking into account the data of benthic surveys, we can suppose that they were Оphiopholis aculeate, an attendant to periphyton fauna, and either Ophiura sarsi or Ophiura maculata, which inhabited mellow sandy-silty grounds. A great portion of the crabs food was formed by polychaetes (18 % of stomach content, 69 % by frequency), hydroids and mollusks (13 % and 10 % of stomach content, respectively). Among polychaetes, sedentary forms (supposedly Maldanidae) prevailed in the stomachs of crabs. Hydroids were represented in the food by four genera: Sertularia, Eudendrum, Abietinaria, and Campanularia. The share of mollusks was formed mainly by cephalopods (8 % of stomach content, 81 % of all mollusk species in the food). Mean index of the stomach fullness was 3.7 ‰о, the maximum one 13.5 ‰о. Thus, the golden king crab is related, by the type of its nutrition, to the group of benthophages with a wide spectrum of diet.