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| 題 名 | 瑪拉巴石斑Epinephelus malabaricus仔魚內部營養至外部營養之轉換=Transition from Endogenous to Exogenous Nutritional Sources in Larvae Malabar Grouper, Epinephelus malabaricus |
|---|---|
| 作 者 | 曾建璋; 侯錦輝; | 書刊名 | 澎技學報 |
| 卷 期 | 8 2004.12[民93.12] |
| 頁 次 | 頁97-110 |
| 分類號 | 438.661 |
| 關鍵詞 | 仔魚; 卵黃囊; 油球; 內部營養; 外部營養; Larvae; Yolk; Oil globule; Endogenous nutrition; Exogenous nutrition; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 多數海產魚類仔魚在孵化後僅靠吸收卵黃囊和油球的營養存活,此時行內部營養,仔魚開口後,開始攝食外界餌料,轉換行外部營養。但飼育中常因攝餌不適應或餌料不充足,使仔魚產生大量損耗,影響種苗生產。本研究擬對瑪拉巴石斑,由卵黃囊與油球被吸收的時間及變化、開口時間及口幅變化、攝餌樣式、攝餌量的變化等進行觀察,了解仔魚期營養轉換過程,以掌握投餵餌料的時機與方式。 依實驗結果將營養轉換過程分為五個階段,(1)未發育期:仔魚營養來源全靠卵黃囊和油球的吸收。(2)攝餌器官形成期:仔魚開口,但此階段未發現攝食現象。(3)攝餌開始期:口幅增大,消化道擴張,開始攝食牡蠣授精卵。(4)餌料轉換期:餌料開始由牡蠣授精卵轉換為輪蟲。(5)餌料強化期:消化管開始分化,胃部與腸可明顯區別,輪蟲攝餌量增加,可強化餌料品質。 |
| 英文摘要 | Many marine fishes are under slow development before hatchment and only absorb yolk and oil globule in order to survive. After endogenous nutrition stage, larvae start to eat bait food and transform to exogenous nutrition stage. Many depletion of larvae were occurred because of food abundance and unsuitable food. The stud investigate time and change of yolk and oil globule, mouth open time and its differences, feeding patterns, and food differences in order to understand nutrition change pattern of larvae Malabar grouper Epinephelus malabaricus. Five different stages were used on experiments of nutritional transition. (1) undevelopment stage: nutrition of larvae Malabar grouper totally relying on yolk and oil globule; (2) feeding forming stage: larvae Malabar grouper open mouth and absorption of yolk has been finished; (3) feeding start stage: larvae Malabar grouper has basic ability to feed food and increase food quantity: (4) transformation of food: food transform from yoster egg to rotifer; and (5) food increasing stage: the digesting path begin development and increase rotifer quantity. This stage can increase feeding frequency and food quality in order to increase individual growth. |
本系統中英文摘要資訊取自各篇刊載內容。