Prey selection and functional response of juvenile lemon sharks Negaprion brevirostris.
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.
Reeve
A
A
School of Biological Sciences, University of Plymouth, Drake Circus, Plymouth PL48AA, UK.
Handy
R D
RD
Gruber
S H
SH
D000818:Animals; D005518:Food Preferences / Q000502:physiology*; D010473:Perciformes / Q000502:physiology; D011156:Population Density; D011235:Predatory Behavior / Q000502:physiology*; D012754:Sharks / Q000502:physiology*