Broodstock collection, captive maturation and spawning of scarlet cleaner shrimp Lysmata amboinensis (De Man, 1888)
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.
