頁籤選單縮合
題 名 | Early Development of a Threatened Freshwater Catfish Mystus montanus (Jerdon)=受威脅種淡水鯰魚 Mystus montanus(Jerdon)之早期發育 |
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作 者 | Arockiaraj,Antonysiluvai Jesu; Haniffa,Mohammed Abdulkhather; SeetharamanSankaran; Singh,Shree Prakash; | 書刊名 | Acta Zoologica Taiwanica |
卷 期 | 14:1 2003.05[民92.05] |
頁 次 | 頁23-32 |
分類號 | 387.101 |
關鍵詞 | 早期發育; 個體發生事件; 受威脅鯰魚; Early development; Ontogenic events; Threatened catfish; Mystus montanus; |
語 文 | 英文(English) |
中文摘要 | Mystus montanus 的卵具相對較小(1.0 -1.2 mm)的卵黃,以及有著高黏度、厚且透明的卵膜。胚胎在活化之後歷經23.0小時的孵化期,於23.0-24.0小時孵化。胚胎的循環系統較早出現(約在17.75小時),我們可由複雜的網狀卵黃系統及發育良好的體節血管辨識出:M. montanus 胚胎可以非常有效地利用各種可能的氧氣來源。我們觀察到孵化後第7至第9天的後期幼體已經可以開始直接呼吸空氣;20天以後的魚苗體長約15.0 -16.0 mm,其外型與成魚大致相似。孵化30天後的小魚體長約在25.0 -30.0 mm的範圍內,此時除了未臻性成熟外,其外部形態已和成魚幾乎相同。 |
英文摘要 | Mystus montanus eggs contain a relatively small yolk (1.0–1.2 mm) and are strongly adhesive. The egg envelope is thick and transparent. Embryos hatched 23.0–24.0 h after activation, and the incubation period was 23.0 h long. The circulatory system appeared early (at 17.75 h) and was characterized by a complex anastomosing vitelline system and by well-developed segmental vessels suggesting that M. montanus embryos can exploit available oxygen sources very efficiently. The post larvae were observed to have begun aerial respiration on the seventh-ninth day after hatching. After 20 days, the length of fry ranged 15.0–16.0 mm and resembled the adult in its external features. The length of fingerlings ranged from 25.0–30.0 mm after 30 days, and their external features were just like those of an adult except that they were not sexually mature. |
本系統中英文摘要資訊取自各篇刊載內容。