Feeding Chronology of Yellowtail Flounder (Limanda ferruginea) and American Plaice (Hippoglossoides platessoides) on Grand Bank (NAFO Division 3N)
Authors
Bruno, I. (Isabel); Costas, G. (Gersom); González-Iglesias, M.C. (María de la Concepción); Paz, X. (Xabier)Date
2000Type
articleKeywords
American plaiceFeeding
Food
Grand Bank
Yellowtail flounder
Abstract
A total of 1199 individuals of yellowtail flounder (Limanda ferruginea, Storer) and
970 individuals of American plaice (Hippoglossoides platessoides, Fabricius) were sampled
from six hauls carried out in a period of 24 hours for studying the feeding chronology of
these species. The main prey of yellowtail flounder (considered as total weight percentage)
were Gammaridae (19.5%), Ammodytes dubius (10.1%) Annelida (6.3%), Mysidacea (6.0%)
and Anthozoa (5.6%). The predominant preys in American plaice were Ammodytes dubius
(72.3%), followed by Mysidacea (8.5%) and Echinarachnius parma (6.1%). Diet
composition varied with size and timetable for both species. The feeding intensity index
values in yellowtail flounder were scaled over 24-hr period, and in both species these
values slightly decreased during the night and at dawn, but in American plaice there was
more variability in the timetable values between the size ranges. The mean weight fullness
index values over the 24-hr period ...
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