Some biological study of babylon shell, Babylonia areolata Link, in captivity for seedling and releasing: Technical paper no.57
1996
Tanin Singhagraiwan (Department of Fisheries, Bangkok (Thailand). Marine Fisheries Div. Eastern Marine Fisheries Development Center)
Study on seed production and some biological aspects of Babylon shell, Babylonia areolata Link, was conducted in hatchery from July 1992-July 1995 at Eastern Marine Fisheries Development Center. The babylon shell could spawned all year round with spawning peak in March. The egg capsule was average 29.31 mm in length and 10.32 mm in width. The number of egg in each capsule were 120-1,349 eggs. The egg was 263 micron in diameter. The incubation period was 5-7 days and the hatching rate was 95.1 percent. The veliger stage, with 0.49 mm shell length, was planktonic form. Settlement was after 10 days of age with settlement rate 1.4 percent. The shell was fed with fish meat, Caranx sp., for one year. The growth rate was 1.032 g/month in term of body weight and 3.14, 1.87 and 1.45 mm/month in term of shell length, shell width and opercular length respectively. The survival rate was 24.47 percent. The food conversion ratio was 1.27:1 through 120 days from initial length 16.54 mm. The babylon shell spawned in tank after 9 months of age.
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Эту запись предоставил Kasetsart University