On feeding of deep-sea crabs on the continental slope of northwestern Kamchatka

Mean index of gastrointestinal tract fullness for golden king crab Lithodes aequispinus is 15.5 ‱. Detritus occurs in 40.5 % of the cases, so it is a common food for this crab, Polychaeta, Ophiuroidea and Decapoda are 33.2 %, 32.1 % and 15.4 % of its ration, respectively, whereas Mollusca are only 1...

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Bibliographic Details
Published in:Izvestiya TINRO
Main Authors: Valery I. Chuchukalo, Victor A. Nadtochy, Vladimir V. Napazakov, Oleg Yu. Borilko, Sergei A. Nuzhdenko
Format: Article in Journal/Newspaper
Language:Russian
Published: Transactions of the Pacific Research Institute of Fisheries and Oceanography 2016
Subjects:
охотское море
краб-стригун угловатый
равношипый краб
коэффициент фроермана
пищевой рацион
трофическая сеть
Aquaculture. Fisheries. Angling
SH1-691
Golden King Crab
Kamchatka
Lithodes aequispinus
Tanner crab
Online Access:https://doi.org/10.26428/1606-9919-2016-184-236-240
https://doaj.org/article/b71c88a255684fd4b2134eadae8916b5
Description
Summary:Mean index of gastrointestinal tract fullness for golden king crab Lithodes aequispinus is 15.5 ‱. Detritus occurs in 40.5 % of the cases, so it is a common food for this crab, Polychaeta, Ophiuroidea and Decapoda are 33.2 %, 32.1 % and 15.4 % of its ration, respectively, whereas Mollusca are only 11.5 % of the ration weight, despite of frequent occurrence. Triangle tanner crab Chionoecetes angulatus has the mean index of fullness 20.9 ‱, Polychaeta and Mollusca are two main components of its ration (31.4 % and 27.3 %, respectively) and Decapoda and Pisces are the secondary components (13.9 % and 12.2 %); detritus occurs in 11.2 % of the cases. Cannibalism is observed incidentally for the latter species.

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