A
scientist from the Dirección General de Recursos Marinos y
Costeros of Panama, working with Laboratory staff and visiting
Japanese scientists, established spawning broodstock populations
of polla drum (Umbrina
xanti), a species of corvina, and spotted rose snappers (Lutjanus
guttatus) in 1996 and 1997.
This represents the first successful spawning in
captivity for both of these species.
Currently, the polla drum broodstock fish are being
replaced with a larger, more commercially valuable, species of
corvina.
The
snapper broodstock have been spawning naturally since 1997.
Their spawning season peaks from May through September,
and they continue to spawn intermittently during the rest of the
year. A group of 70
fish, hatched in captivity in October 1998, is being held in two
12,000-L tanks. On
average, these fish were about 50 cm long and weighed about 1.4
kg each at the end of 2001.
The objective is to complete the life cycle of this
species in captivity and to study the growth patterns and
feeding requirements of the juveniles.