Daily ration of Antarctic silverfish (Pleuragramma antarcticum Boulenger, 1902) in the Eastern Weddell Sea

The daily ration of Pleuragramma antarcticum in the Eastern Weddell Sea was investigated from midwater and bottom trawl samples collected in the Antarctic in the summer of 1998. Using a gastric evacuation model that takes into account Weddell Sea temperature below zero and information on the prey ty...

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Bibliographic Details
Published in:Scientia Marina
Main Authors: Ignacio Olaso, Antoni Lombarte, Francisco Velasco
Format: Article in Journal/Newspaper
Language:English
Published: Consejo Superior de Investigaciones Científicas 2004
Subjects:
daily ration
evacuation rate
antarctic
pelagic fish
temperature
Aquaculture. Fisheries. Angling
SH1-691
Antarctic
The Antarctic
Weddell Sea
Weddell
Elliot
Persson
Antarc*
Antarctic silverfish
Online Access:https://doi.org/10.3989/scimar.2004.68n3419
https://doaj.org/article/53c097ba898648009a78281a8e5f0e68
Description
Summary:The daily ration of Pleuragramma antarcticum in the Eastern Weddell Sea was investigated from midwater and bottom trawl samples collected in the Antarctic in the summer of 1998. Using a gastric evacuation model that takes into account Weddell Sea temperature below zero and information on the prey type daily ration estimates were: 1.133% BW for immature fish of 10-16 cm and 0.484% BW for mature fish of 17-24 cm. The low daily ration intake was influenced by the low temperatures that limited the rate of gastric evacuation. This model seems more realistic than results from the classic Elliot & Persson and Eggers models that are also used in this paper, since their assumptions on feeding regularity are more rigid and they do not consider data of energy density of the prey.

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