Results of management of oyster spawning stocks and obtaining of their juveniles in artificial conditions

• Main Authors: Vizhevsky, V.I., Orlenko, A.N.
• Other Authors: Yakovlev, V.N.
• Format: Other Non-Article Part of Journal/Newspaper
• Language: Russian
• Published: 1994
• Subjects: Crassostrea gigas; Larvae; Pacific oyster; Shell growth; Collecting devices; Survival rate; Тихоокеанская устрица; Длина раковины; Линейный рост; Выживаемость; Коллекторы; Pacific
• Online Access: http://hdl.handle.net/1834/15814

A study of linear and weight growth of Pacific (Crassostrea gigas) and Black Sea (Ostrea edulis) oysters was made in 1992-1993 in three areas of the Black Sea coast of Crimea (Ukraine): 1) in the southern part of the Kerch strait; 2) in the Lake Donuzlav; 3) on the Kara-Dag coast. Oysters were kept in retainer devices and on collectors. In Lake Donuzlav, the average daily shell growth increment in Pacific oysters was 0.21 mm/day an over the 4.5 month summer-autumn period. The daily average weight growth over the same period was as high as 0.6 g/day. The growth rate of Pacific oysters in the Kerch Strait was two times less than in Lake Donuzlav. There was 100% survival rate of oysters both in Lake Donuzlav and in the Kara-Dag area. Average oysters mortality in the Kerch Strait area was equal to 12%. The linear growth of Black Sea oysters (from artificially produced spat) in the Kerch Strait area was relatively high during the first one and a half months after the retainer devices were put out to sea, amounting to 9.3 mm over that period. The daily average weight growth was 0.11 g over the three summer months, dropping to 0.006 g in September-October. The pilot production of Pacific oyster larvae and spat made use of the facilities of the aqua-biological station at Kara-Dag. В 1992-1993 гг. в трёх районах Чёрного моря: южной части Керченского пролива (район э/б ЮгНИРО, пос. Заветное), на оз. Донузлав и у побережья Карадага было осуществлено изучение линейно-весового роста тихоокеанских и черноморских устриц, которых содержали в садках и на коллекторах. На озеро Донузлав первую партию тихоокеанских устриц из Керченского пролива завезли в июле 1992 г. В течение летне-осеннего периода наблюдался активный линейный и весовой рост завезённых особей. За период 2,5 месяца линейный прирост раковины составил в среднем 0,26 мм/сут., а прирост массы тела — 0,64 г/сут. При низких зимних температурах устрицы практически не росли. С октября по май вышеуказанные показатели составили всего 0,008 мм/сут., и 0,024 г/сут. В 1993 г. ...