Food habits of the longnose skate, Raja rhina (Jordan and Gilbert, 1880), in central California waters

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Robinson, H. J., Cailliet, G. M., & Ebert, D. A. (2007). Food habits of the longnose skate, Raja rhina (Jordan and Gilbert, 1880), in central California waters. Environmental Biology of Fishes, 80(2), 165-179. doi:10.1007/s10641-007-9222-9
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TitleFood habits of the longnose skate, Raja rhina (Jordan and Gilbert, 1880), in central California waters
AuthorsJ. Robinson, M. Cailliet, A. Ebert
AbstractFeeding studies can provide researchers with important insights towards understanding potential fishery impacts on marine systems. Raja rhina is one of the most common elasmobranch species landed in central and northern California demersal fisheries, yet life history information is extremely limited for this species and aspects of its diet are unknown. Specimens of R. rhina were collected between September, 2002 and August, 2003 from fisheries-independent trawl surveys. Percent Index of Relative Importance values indicated that the five most important prey items in 618 stomachs of R. rhina were unidentified teleosts (31.6% IRI), unidentified shrimps (19.6% IRI), unidentified euphausiids (10.9% IRI), Crangonidae (7.4% IRI), and Neocrangon resima (6.0% IRI). There were significant dietary shifts with increasing skate total length and with increasing depths. Smaller skates ate small crustaceans and larger skates ate larger fishes and cephalopods. With increasing depths, diet included bentho-pelagic teleosts and more cephalopods and euphausiids. The findings of this study are consistent with previous researchers that report similar diet shifts in skate species with size and depth. © 2007 Springer Science+Business Media, Inc.
JournalEnvironmental Biology of Fishes
Date2007
Start page165
End page179
ISSN03781909
Subjectscrustacean, diet, feeding behavior, marine environment, teleost, California, North America, United States, Cephalopoda, Crangonidae, Crustacea, Decapoda (Crustacea), Euphausiidae, Neocrangon resima, Pisces, Raja rhina, Rajidae, Teleostei
NoteCited By (since 1996):14, CODEN: EBFID

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