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Cybium,
Revue
Internationale dIchtyologie |
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Feeding habits of the saddled bream, Oblada melanura (Sparidae), in the Adriatic Sea Armin PALLAORO (1), Mate SANTIC (2) & Ivan JARDAS (1) (1) Institute
of Oceanography and Fisheries, Met. I. Mestrovica 63, 21000 Split, CROATIA.
Abstract.
- The feeding habits of the saddled bream, Oblada melanura
(Linneaus, 1758), from the Adriatic Sea were investigated with respect
to fish size and season. Stomach contents of 926 specimens, 11.3-29.3
cm TL, collected by beach seine from 1992 to 1993, were analyzed. Of the
total number of examined stomachs, 87 were empty (9.4%). This percentage
varied significantly over the year, with a maximum number of empty stomachs
recorded during the winter and a minimum number recorded during the summer.
Copepods constituted the main prey in all size-classes. With fish growth,
the proportion of planktonic organisms decreased, while that of fish and
benthic organisms increased. The mean weight of stomach contents increased
significantly for fish larger than 22.0 cm TL. Diet composition showed
little seasonal variation, copepods were the most prey item important
in all seasons, especially during the warmer part of the year. Higher
intensities of feeding activity in spring and summer could be related
to temperature and maximal abundance of zooplankton and benthic organisms.
The results indicated that the saddled bream fed on a wide range of prey
items and could be considered an opportunistic predator. |
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