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Variabilities in stomach contents of cod, collected by demersal and pelagic trawl in the southern part of the Barents Sea

Ajiad, Adnan Mosa
Working paper
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CM_1990_G_03.pdf (895.9Kb)
URI
http://hdl.handle.net/11250/104767
Date
1990
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  • ICES CM documents authored by IMR scientists (1949-2011) [3139]
Original version
This report is not to be cited without prior reference to the author  
Abstract
Samples of Northeast Arctic cod stomachs were collected separately on

demersal and pelagic stations at the same date in February 1986 and

were analysed for length group 30-40cm. The results indicate that the

mean value of the stomach contents weight as well as the food composition

are substantially different for the two type of gear. The

Spearman rank correlation coefficent (rs = 0.109;t = 0.363;P > 0.1) is

not significant based on frequency data calculated from the diet of

cod gathered by demersal and pelagic stations. These results question

the accuracy of the consumption estimates which is based on a combination

of field stomach contents weight and laboratory gastric evacuation

rate studies. Therefore the mean value of the stomach contents

weight should be distributed on the fishing gears, in addition to

seasons, subareas, fish size and time of the day.
Publisher
ICES
Series
ICES CM Documents;1990/G:3

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