Pl. Colin et al., INGRESS AND SETTLEMENT IN THE NASSAU GROUPER, EPINEPHELUS-STRIATUS (PISCES, SERRANIDAE), WITH RELATIONSHIP TO SPAWNING OCCURRENCE, Bulletin of marine science, 60(3), 1997, pp. 656-667
Ingressing pelagic juvenile Epinephelus striatus were collected in a t
idal channel at Lee Stocking Island, Exumas, Bahamas during both Janua
ry 1989 and 1990, starting 37 days after the December full moon. They
subsequently recruited for only about 1 week, generally at night on in
coming tides with maximal densities of 1 fish per 1000-3000 m(3) water
Otolith increment back dating to spawning dates of pelagic and benthi
c juvenile E. striatus in the Exumas indicated nearly all spawning dat
es were near the full moon of December. Spawning at an unknown site in
Exuma Sound, believed to be the source of recruits collected, may hav
e occurred only during December or alternately no recruits may have su
rvived from a January spawning in Exuma Sound. Increment formation in
benthic juveniles, verified by capture and hold experiments, indicate
a larval Life length of 37-45 days (mean = 41.6). Recently-settled E.
striatus were found on artificial reef substrates (cement blocks and c
onch shells), natural reefs and rubble mounds produced by Malacanthus
plumieri. Benthic juvenile E. striatus appeared on artificial reefs sh
ortly after first collection of pelagic juveniles.