Prey selection and functional response of juvenile lemon sharks Negaprion brevirostris

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Abstract:

Prey preference of juvenile lemon sharks Negaprion brevirostris was examined in experiments conducted in field-based pens where the fish were offered meals of live teleosts: grey snapper Lutjanus griseus and yellow fin majorra Gerres cinereus in ratios of L. griseus:G. cinereus varying from 10:0 to 2:8. Relative electivity indices for each treatment showed that N. brevirostris preyed on G. cinereus rather than L. griseus. They showed a prey preference relating to density of G. cinereus (type II functional response) but not to L. griseus.

Keywords: Gerres cinereus; Lutjanus griseus; lemon shark; prey preference

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1095-8649.2009.02265.x

Affiliations: 1: School of Biological Sciences, University of Plymouth, Drake Circus, Plymouth, PL4 8AA, U.K. 2: Bimini Biological Field Station, Bimini, Bahamas, and Rosenteil School of Marine and Atmospheric Sciences, University of Miami, Miami, Florida, U.S.A.

Publication date: July 1, 2009

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