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Суточный пищевой рацион и некоторые черты биологии краба-стригуна опилио Chionoecetes opilio в японском море в весенний период

Суточный пищевой рацион и некоторые черты биологии краба-стригуна опилио Chionoecetes opilio в японском море в весенний период

Abstract

Представлены результаты исследований питания краба-стригуна Chionoecetes opilio в Японском море в весенний период. Проведена сравнительная характеристика питания самцов и самок этого вида у побережья Приморья. Отмечается, что по частоте доминирования у самцов в пище преобладают полихеты и четырехугольный волосатый краб, а у самок — полихеты и креветки. Впервые для этого района и времени года определен суточный пищевой рацион C. opilio, который составил у самцов 2,5, у самок 5,5 % массы тела. Предполагается, что такое интенсивное питание у самок носит кратковременный характер и связано с большими затратами энергии на воспроизводство новых продуктов. Впервые установлен каннибализм у самок. Определено среднее значение индивидуальной абсолютной плодовитости самок у побережья Приморья, которое составило 57,2 тыс. икринок при средней ширине карапакса 73,6 мм.

Feeding of snow crab Chionoecetes opilio is considered for the Japan Sea in spring. Polychaetes and crabs dominate in the diet of males, and polychaetes and shrimps — in the diet of females. Their daily rations are determined for the first time in this region: 2.5 % of body weight for males and 5.5 % for females. Such intensive feeding of females is supposedly short-term phenomenon caused by high energy costs for reproduction. Cases of cannibalism are registered for females for the first time. Mean individual absolute fecundity of females is estimated in 57.2 thousand eggs (their mean carapace width is 73.6 mm).

Keywords

ЯПОНСКОЕ МОРЕ, СЕВЕРНОЕ ПРИМОРЬЕ, КРАБ-СТРИГУН ОПИЛИО, КОЭФФИЦИЕНТ ФРОЕРМАНА, ИНТЕНСИВНОСТЬ ПИТАНИЯ, СУТОЧНЫЙ ПИЩЕВОЙ РАЦИОН, КАННИБАЛИЗМ, ИНДИВИДУАЛЬНАЯ АБСОЛЮТНАЯ ПЛОДОВИТОСТЬ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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