Ontogenetic and seasonal feeding habits of the annular seabream (Diplodus annularis L.) in Zostera sp. beds, eastern Adriatic Sea
Summary The ontogenetic and seasonal feeding habits of 489 individuals of Diplodus annularis L. in Zostera sp. beds were studied using frequency of occurrence, numeric percentage, percentage by weight and an index of relative importance (IRI). The Schoener overlap index was used to compare diets by...
Saved in:
Published in | Journal of applied ichthyology Vol. 20; no. 5; pp. 376 - 381 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Berlin, Germany
Blackwell Verlag GmbH
01.10.2004
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Summary
The ontogenetic and seasonal feeding habits of 489 individuals of Diplodus annularis L. in Zostera sp. beds were studied using frequency of occurrence, numeric percentage, percentage by weight and an index of relative importance (IRI). The Schoener overlap index was used to compare diets by fish size and seasons. Diet composition including 18 different prey taxa was evidently heterogenous among annular seabream size groups, with no significant dietary overlap. In relation to body size, juveniles were omnivorous and preferred algae and plants, while adults were omnivorous and preferred animals. Principal prey items by decreasing importance were Chlorophyta (dominant taxa Cladophora sp. and Enteromorpha flexuosa), Decapoda (dominant species Upogebia pusilla), Gastropoda (important species Rissoa ventricosa and Alvania sp.), Bivalvia and Spermatophyta, as well as other food items (mostly unidentified Crustacea and fish eggs). Differences in diets among seasons were not significant. |
---|---|
Bibliography: | ArticleID:JAI585 ark:/67375/WNG-Q8RZ94MV-Z istex:BE4DD180C553E305219E0DC5D29A0A986942FBFA ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0175-8659 1439-0426 |
DOI: | 10.1111/j.1439-0426.2004.00585.x |