Behavioral ontogeny in larvae and early juveniles of the giant trevally (Caranx ignobilis) (Pisces: Carangidae)
Data(s) |
2006
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Resumo |
Behavior of young (8−18 mm SL) giant trevally (Caranx ignobilis), a large coral-reef−associated predator, was observed in the laboratory and the ocean. Size was a better predictor of swimming speed and endurance than was age. Critical speed increased with size from 12 to 40 cm/s at 2.7 cm/s for each mm increase in size. Mean scaled critical speed was 19 body lengths/s and was not size related. Swimming speed in the ocean was 4 to 20 cm/s (about half of critical speed) and varied among areas, but within each area, it increased at 2 cm/s for each mm increase in size. Swimming endurance in the laboratory increased from 5 to 40 km at 5 km for each mm increase in size. Vertical distribution changed ontogenetically: larvae swam shallower, but more variably, and then deeper with growth. Two-thirds of individuals swam directionally with no ontogenetic increase in orientation precision. Larvae swam offshore off open coasts, but not in a bay. In situ observations of C. ignobilis feeding, interacting with pelagic animals, and reacting to reefs are reported. Manusc |
Formato |
application/pdf |
Identificador |
http://aquaticcommons.org/8977/1/leis.pdf Leis, Jeffrey M. and Hay, Amanda C. and Clark, Domine L. and Chen, I-Shiung and Shao, Kwang-Tsao (2006) Behavioral ontogeny in larvae and early juveniles of the giant trevally (Caranx ignobilis) (Pisces: Carangidae). Fishery Bulletin, 104(3), pp. 401-414. |
Idioma(s) |
en |
Relação |
http://aquaticcommons.org/8977/ http://fishbull.noaa.gov/1043/leis.pdf |
Palavras-Chave | #Biology #Ecology #Fisheries |
Tipo |
Article PeerReviewed |