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研究報告

更新日期: 2015-02-09
點閱數: 1,760

海龍孵化繁殖技術之建立

年度 2013
計劃名稱 海龍孵化繁殖技術之建立
中文摘要 不論是淡水、半淡鹹水或海洋棲性的海龍科(Family Syngnathidae)物種,皆因為過度利用、環境汙染與棲地喪失,而使野生動物資源受到影響並成為瀕危物種。而人工繁殖培育可能成危在傳統藥材、觀賞水族與工藝品需求上的解決之道。悉數種類不僅因為具有特殊型態與獨特的生理行為,且所有種類皆具有相對較高的附加價值。本研究探討影響淡水、半淡鹹水與海洋棲性,分別以Microphis屬、Hippichthys屬、Doryrhamphus屬及Doryichthys屬為代表之海龍物種,其種別、棲性、水質條件與各項參數、性比、不同投餵餌料種類與組成等因素對於人工繁殖培育海龍之影響。在為期6個月的試驗中,發現光照週期18:6(光照:黑暗)對個體活存、成長與交配具良好效果,而將諸如微藻、輪蟲、豐年蝦及其無節幼蟲、絲蚯蚓、微蟲、米蝦與卵胎生魚類混合投餵並經滋養強化處理,則對海龍稚幼苗階段具成長助益。淡水(genusMicrophis)、半淡鹹水(genusHippichthys and Doryichthys)與海洋棲性物種(genus Doryrhamphuss),仔稚魚孵化後培養至90天之活存率分別為60-85%, 25-85%及25-40%,試驗證實適當的光照、性比、充滿變化之多樣性餌料投餵、投餵頻率可促進不同階段海龍之活存、成長、攝食與配對行為。計劃執行分別成功培育淡水、半淡鹹水與海洋棲性海龍各計3種、3種及2種,並可作為兼具觀賞與藥用價值之新興繁養殖培育對象。
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.
計畫編號 102農科-11.3.3-漁-F3(4)
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