Mass production in concrete tanks of sugpo Penaeus monodon Fabricius spawners by eyestalk ablation
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Two batches of 196 and 181 P. monodon females were ablated on one eyestalk in March and July 1977, respectively, and a control batch of 180 unablated females was stocked in July 1977. The females were stocked with males in 120-ton concrete tanks with partial flowthrough of water and fed salted mussel (Modiolus metcalfei ) at 15% body weight daily. Total number of spawnings was 82 for the March-ablated group, 3 for the July-ablated group and 4 for the July unablated group. Maturation and mortality in relation to the moult cycle and tank plus water conditions are discussed.