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種鰻培育及幼苗育成技術之研究

  • 日期:106-03-24
  • 計畫編號:106農科-10.3.4-水-A1(1)
  • 年度:2017
  • 領域:漁業科技研發
  • 主持人:陳冠如
  • 研究人員:蕭玉晨、楊順德

鰻魚為重要之經濟養殖魚種,建立鰻魚人工繁殖技術、供應鰻苗,將有助於維持 鰻魚等相關產業永續發展。本年度注射激素為鮭魚腦下垂體研磨液混合促性腺激素 ,累計注射約120尾鰻魚,藉由體增重、泄殖口張開程度及卵粒直徑來判斷誘導發育 成熟雌鰻產卵時機,超過80%的雌鰻可以誘導產卵,目前共計總產卵量約300萬粒 ,部分受精卵孵化出鰻苗,鰻苗活存6天。當檢視卵徑達0.95 - 1.00mm以上比例超 過50%時誘導產卵,可以獲得受精卵與孵出鰻苗,此結果將為後續誘導發育成熟雌鰻 產卵時機的參考。

研究報告摘要(英)


The Japanese eel is one of the most important economic aquaculture species of east Asia. All seedling used for aquaculture farm is completely dependent on wild glass eels caught in estuaries and coastal areas. However , natural sources of glass eels have drastically declined in recent years. Therefore, it is necessary to establish a method for seed production of eel elvers that is not dependent on wild catch. This study was conducted to explore the suitable methods for induced spawning of the japanese eel ( Anguilla japonica ). Repeated injections ofsalmon pituitary homogenates mixed gonadotropin can induce spermatogensis in male eels and vitellogenesis in female eels, and female eels ovulation can be achieved by injection of 17α,20β-dihydroxy-4-pregnen-3-one (DHP) .This year total of about 120 eels were injected.By body weight gain, the degree of opening of the vent opening and the diameter of the oocysts to determine the timing of oviposition in developing mature female eels, more than 80% of the female eels can induce spawning. At present, the total fecundity is about 3 million, part of the fertilized eggs hatched, eel seed survival to 6 days. This results might suggest When the ratio of oocyte diameter 0.95-1.00 mm more than 50% to induced oviposition, fertilized eggs and hatchling eel seed can be obtained.