Broodstock
Rearing and Spawning of Black Sea Turbot, Psetta maxima
S.
Hara, M. Özongun, E. Güneş, B. Ceylan-2002
Turkish
Journal of Fisheries and Aquatic Sciences, 2: 9-12
Abstract:
Broodstock development and induction of spawning of Black Sea turbot, Psetta
maxima has been conducted between 1998 and 2001 in the Central Fisheries
Research Institute, Trabzon, Turkey. One of the environmental and feeding
conditions evident in broodstock management is the optimum water temperature
below 17°C which is the present culture condition at the Institute.
Likewise, frozen whiting is considered to be a good broodstock diet from the
viewpoint of nu-tritional and ecological aspects. Growth of hatchery-bred
broodstock fed this diet is shown as the relationship of body weight to age
(month) represented as an equation of: y = 0.072 x + 0.164 (R² = 0.998).
Natural spawning was observed for 2-year-old hatchery-bred stock at water
temperature of 14°C, however, no spawning was observed by the same
broodstock at 3-years of age. On the other hand, induction of spawning for
wild-caught broodstock were established through hormonal treatment.
A total of 78 artificial inseminations for 61 wild-caught females were
carried out between 1998 and 2001spawning season (April and May). An average
yearly production of 1.96 million newly hatched larvae was recorded with an
average fertilization rate of 39.5% and a mean hatching rate of 32.5%.
(Central
Fisheries Research Institute, P.O.Box 129, 6001 Trabzon, Turkey, Tel.:
+90.462.341 10 52; Fax: +90.462.341 11 57, E-mail: turbotpj@gul.net.tr)