Problems and Achievements in Seed Production of the Black Sea Turbot in Russia
O.N. Maslova-2002
Turkish Journal of Fisheries and Aquatic Sciences,
2(1): 23-27
Abstract:
This paper summarizes the research done at the Russian Federal Research
Institute of Fisheries and Oceanography to develop hatchery technology for
the Black Sea turbot Scophthalmus maeoticus and release the juveniles
produced into the sea. Quality of eggs and larvae, nutritional value of the
live food organisms, and bacterial contamination of rearing tanks were the
major factors responsible for the highly variable survival of turbot larvae
during the first month of life, and the unpredictable hatchery production.
Control of the timing of egg stripping and fertilization and removal of
nonviable embryos during incubation helped improve the quality of eggs and
larvae. Methods were developed to improve the quality of live food and the
rearing conditions. Improved cultivation of live foods, enrichment of
rotifers with algae mix, enrichment of Artemia metanauplii
alternately with artificial diets and algae, and delaying the transition to
feeding on Artemia nauplii helped improve the survival of turbot
larvae. Only 5-7% of larvae had abnormal pigmentation. Survival was 80% at
the end of the first month of life and 40-65% at the end of two months.
Hatchery operation and production were thus stabilized. Regular release of
hatchery-reared juvenile turbot into the sea can be an effective method of
increasing the turbot population in the Black Sea.
(Russian Federal Research Institute of Fisheries and
Oceanography (VNIRO), 17, V. Krasmoselskay St., 107140, Moscow, Russia,
Tel.: + 90 007 095 264 93 87, Fax: 007 095 264 93 67, E-mail: olgamasl@cityline.ru)