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題 名 | 大鱗梅氏鯿Metzia Mesembrina (Jordan & Evermann, 1902)人工繁養殖及幼苗發育=Induced Spawning and Larval Development of the Large-scale Lesser Bream Metzia Mesembrina (Jordan& Evermann, 1902) |
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作 者 | 賴弘智; 陳昱翔; 林翰揚; 潘宏裕; 施志昀; | 書刊名 | 特有生物研究 |
卷 期 | 11:1 2009.01[民98.01] |
頁 次 | 頁37-45 |
分類號 | 439.5 |
關鍵詞 | 大鱗梅氏鯿; 人工繁殖; 胚胎發育; 魚苗發育; Metzia mesembrina; Induced spawning; Embryonic development; Larval development; |
語 文 | 中文(Chinese) |
中文摘要 | 大鱗梅氏鯿Metzia Mesembrine (Jordan & Evermann, 1902) ,過去在台灣各地曾有不同之採集紀錄,然近數十年來僅在金門地區發現極少量野生族群,因此其復育必須儘快進行。本實驗利用人工催熟與自然產卵方式,進行繁殖與育苗試驗,以瞭解大鱗梅氏鯿之生殖習性、受精卵與魚苗發育過程,期望逐步建立大鱗梅氏鯿之繁殖與幼苗發育的基礎生物學資料,做為基礎生物學資料應用、種原庫建立或自然環境中復育之基礎。大鱗梅氏鯿主要產卵於水生植物或石塊上,魚卵卵徑約1.3 mm,透明且光滑,沈性且帶黏性,在水溫22-24 ℃的環境中30-35 hr 孵化,平均積溫值31.2 degree-days ,初孵化魚苗全長約為3.4 mm ,孵出後第3 天可開始攝食餌料,第4 天觀察到感覺芽,第7 天已觀察到背鰭與臀鰭逐漸發育,第17 天腹鰭開始發育,第30 天鱗片開始發育,第36 天可清楚觀察到鱗片,此時幼魚外表形態類似於成魚。 |
英文摘要 | The large-scale lesser bream Metzia Mesembrine (Jordan & Evermann, 1902) is a small cyprinid fish native to Taiwan. Due to environmental deterioration resulted from water pollution, habitat destruction and introduction of exotic fishes, its population in Taiwan has been extinct. Only a small population still exists in the Kin-Men Island. For the conservation of this endangered fish, we conducted its induced spawning in the laboratory with injection of a mixed solution of grounded pituitary glands from walking catfish (Enctkcu sp.) and LRH-A. We observed its spawning habit and examined its embryonic and larval developments at water temperatures of 22-24℃. Fertilized eggs had an average diameter of 1.3 mm. Larvae were hatched at 30-35 hours after spawning. Newly hatched yolk-sac larvae had total lengths at an average of 3.4 mm. The larvae started feeding on 3 DAH (days after hatching), sensory buds were observable on 4 DAH, and dorsal and anal fins emerged on 7 DAH, pelvic fins on 17 DAH, and scales on 30 DAH. Scales of larvae were clearly observable on 36 DAH and the appearance was similar to adult. |
本系統中英文摘要資訊取自各篇刊載內容。