| 英文摘要 |
Almost sea dragon and/or pipe fish (Syngnathidae)(including freshwater, brackish water and marine species) are imminent danger species for many issues in wild animal resource conservation including overexploitation, aquatic environment polluted and habitat loss. Artificial propagation has been proposed as one solution to address unsustainable trade for traditional medicine, ornamental fishes and curios. Almost species have not only specific morphological model but also special physiological behavior. And all species have higher price and additive value in ornamental fish market. This investigation examined the effects of species, habitat, water quality and parameters, sex ratio, various feed organisms culture, maintain and feeding, and propagation, survival ration (PHD 90) and growth of different species sea dragon (including genus Microphis, Hippichthys, Doryrhamphus and Doryichthys). During the 6-month study, almost species of sea dragon cultured at a photoperiod L:D=16:8 had higher survival ratio, mating frequencies and breed. Juvenile growth rate increased with mixture and enhance feed organisms, including microalgae, rotifer, Artemia and nauplii, tubifex, microworm, Caridina spp. and livebearer fish (platy, molly and guppy). Survival ratio of freshwater(genusMicrophis), brackish (genusHippichthys and Doryichthys)and marine(genus Doryrhamphuss) species were 60-85%, 25-85% and 25-40% when juvenile after PHD 90, respectively. Results demonstrated that appropriate photoperiods, sex ratio, various feed organisms and feeding frequency can improve the survival, growth, feeding and mating of the juvenile, sub-adult and adult sea dragon. |