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Prey selection and functional response of juvenile lemon sharks Negaprion brevirostris
Author(s) -
Reeve A.,
Handy R.D.,
Gruber S.H.
Publication year - 2009
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2009.02265.x
Subject(s) - biology , juvenile , predation , functional response , zoology , fish <actinopterygii> , ecology , fishery , predator
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 .