La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The importance of physical and biogenic structure to juvenile fishes on the shallow inner continental shelf
Auteurs :	R. J. Diaz, Auteur ; G. R. Cutter, Auteur ; K. W. Able, Auteur
Type de document :	Article
Dans :	Estuaries (26(1) FEB 2003)
Article en page(s) :	12-20
Résumé :	Fish-habitat relationships on the shallow inner continental shelf were quantified with video sled and metered beam trawl on Fenwick and Weaver shoals offshore of Maryland and Delaware, U.S. These areas provide megascale physical relief and habitat complexity, but for juvenile fishes, mesoscale and microscale habitat is very important particularly as refuge from predation. At these smaller scales, much of the relief on the inner continental shelf is contributed by bedforms or sand waves and biogenic structures such as tubes, shell beds, or pits. A quantitative association for juvenile fishes between and within benthic habitats was found and related primarily to bedform size and amount of biogenic structure. The incidence of fishes was about four-times higher for large bedforms (> 30 cm wavelength and about 10 cm crest height) relative to smaller bedforms (

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