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ID 28910
file
title alternative
消化管蛍光法による浮遊性カイアシCalauns sinicusの瀬戸内海における摂餌生態
creator
Yamamoto, Fumi
subject
Calanus sinicus
copepod
feeding
gut pigment
Inland Sea of Japan
NDC
Zoology
abstract
We investigated in situ feeding of adult females of the planktonic copepod Calanus sinicus in the Inland Sea of Japan by the gut fluorescence method. Unlike many empirical observations of food-dependent feeding in copepods, no correlation was found between in situ gut pigment of C. sinicus and ambient chlorophyll a concentration. This might partly be due to the large (up to 13-fold) variability in individual gut content, which persisted thrdughout the day. The C. sinicus population showed a diel feeding periodicity; mean gut pigment was significantly higher at night than during the day. Gut evacuation rate increased linearly with increasing temperature. Daily pigment ingestion rates were estimated at 3 stations where gut pigment data over 24 h were available. They varied from 209 to 842 ng pigment indiv.^<-1> d^<-1>. Assuming that the population biomass of C. sinicus at these stations was 32 mg C m^<-3> (the average biomass in Osaka Bay), the population would have consumed 13 to 85% of the phytoplankton standing crop per day.
journal title
日本プランクトン学会報
volume
Volume 42
issue
Issue 2
start page
123
end page
139
date of issued
1995-12-25
publisher
日本プランクトン学会
issn
0387-8961
ncid
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1995 The Plankton Society of Japan
department
Graduate School of Biosphere Science



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