Abstract
This paper reports the results of hybridization among four Penaeus spp by means of artificial insemination (spermatophore transplantation). In 2 trials, 143, 000 nauplii of P. penicillatus × P. chinensis were obtained at 97% of hatching rate, and 4, 000 hybrids survived up to PLD 8 (8 days after metamorphosis into postlarva). In 6 trials, 44, 800 nauplii of P. mondon × P. chinensis were obtained at 13.2% of hatching rate, and 141 hydrids survived up to PLD 6. In 3 trials, 1, 900 nauplii of P. penicillatus × P. indicus were obtained at 60% of hatching rate, and 1680 hybrids survived up to PLD 5. Through characteristics of carapace, rostrum, 3rd walking leg, and uropod, juveniles of three hybrid shrimps were able to be distinguished from one another.
