Association
with underwater structures in hatchery-reared and wild red snapper Lutjanus
campechanus juveniles
R. Masuda, K. Keller, D.A. Ziemann, J. Ogle-2003
Journal
of the World Aquaculture Society, 34(2): 140-146
(from ISI Current Contents)
Abstract:
Behavioral observations were conducted with red snapper juveniles to improve
release strategies for stock enhancement of this species. Association with
an underwater structure was compared between hatchery-reared and wild
juveniles using video recording. Both hatchery-reared and wild fish tended
to stay inside the structure in the daytime and outside it at night.
Hatchery-reared fish spent longer periods inside the structure in the
daytime, but showed less association with the structure at night compared to
the wild fish. We concluded that association behavior is innate but can be
fine-tuned through experience.
(Kyoto University, Fisheries Res. Stn., Kyoto
6250086, Japan)