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Temporal asymmetries in the feeding patterns along the tidal cycle in two sympatric littoral blennies
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Orientador(es)
Resumo(s)
The temporal patterns of feeding activity of Lipophrys pholis and Coryphoblennius galerita were studied by
snorkelling dives during high-waters. The feeding activity was especially intense during the rising-tide
when compared to the ebbing-tide. The relative abundances of C. galerita and small L. pholis observed on
rock-walls were higher during the rising- and high-tide. However, L. pholis larger than 7–8 cm showed
higher relative abundance on rock-walls during the ebbing phase, apparently because they move up and
down with the tide, and many individuals were in their downward movements as the tide ebbs. It is
hypothesized that the asymmetry in feeding pattern observed in both species reflects a trade off between
two conflicting needs, maximizing feeding time and reaching their low-tide shelters in time, avoiding the
risk of getting stranded in unsuitable locations.
Descrição
Palavras-chave
Lipophrys pholis Coryphoblennius galerita Rocky shore Feeding activity Tidal rhythms Microhabitat shifts
Contexto Educativo
Citação
Estuarine, Coastal and Shelf Science, 79, 566-568