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Spawning, larval and juvenile rearing of babyl

Phuket M arine Biological Center Special Publication no. 16 (1996): 137-142

137

SPAWNING, LARVAL AND JUVENILE REARING OF
BABYLON SNAIL (BABYLONIA AREOLATA, L.)
UNDER LABORATORY CONDITIONS
By Tanate Poomtong & Jararat Nhongmeesub
Prac!wap Khiri Khan Coastal Aquaculture Development Center
Klong Wan, Prachuap Khiri Khan 77000, Thailand

ABSTRACT
Adult babylon snails were collected from nature and held in a cement tank. Egg capsules
were attached during night-time to the bottom, or a coarse substratum in the tank. Each
capsule contained about 400 eggs in a jelly-like fluid. About 6 days after spawning the
bilobed veliger larvae hatched out, then spent about 20 days of free-swimming larval stage,
and metamorphosed after 25 days. The larvae were fed with mixed phytoplankton. Newly
settled ju veniles were fed with soy bean cake until a shell length of 3 mm, then trash fish
was used as feed. Techniques to solve problems leading to mass mortality are presented.




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