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Abstract
Scarlet cleaner shrimp broodstocks were collected from local divers exploiting in coral reefs in Nha Trang Bay. Results showed that the average maturity rate was 14.26%. The maximum size of collected breeders was 5.9 cm TL and 3.0 g BW, with an average size of 4.48 cm and 1.46 g, respectively. Mean size at first sexual maturity for female was 4.27 cm TL and 1.20 g BW. Survival rate of breeders were 77% and 60% after one and two months, respectively. The shrimp easily matured and spawned in captivity, with spawning rate ranged from 37 - 44% after one month. They could also mature and spawn at a low temperature of 20oC. Wild-caught breeders showed a better reproductive efficiency than the captive raised ones, with an average viable fecundity of 960 zoea1/g compared to 205 zoea1/g breeder. Scarlet cleaner shrimp was a simultaneous hermaphrodite but unable to self-fertilize.
Keywords: Scarlet/white-striped cleaner shrimp, Lysmata amboinensis, broodstock, sexual maturation,
spawning.