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Title: A preliminary report on the gonadal development of adult milkfish, Chanos chanos, reared in tanks
Authors: Liao, I C.;Chang Y.S.
Date: 1976
Issue Date: 2017-11-21T08:15:36Z
Publisher: Proceedings of the International Milkfish Workshop-Conference
Abstract: 虱目魚為台灣最重要之養殖魚類之一,養殖面積達一萬六千餘公頃,每年約須一億六千萬尾以上之魚苗。近年來由於人口之快速增加,魚苗需求量大增,造成天然魚苗不敷供應之危機。
為了提供足量的魚苗,省水試所東港分所自1970年起開始著手虱目魚人工繁殖之準備工作,及一方面自天然海域捕捉種魚外,另一方面在池中開始培育種魚。經過六年的飼育,於1976年4月11日解剖一尾雄魚與一尾雌魚,雄魚之精巢重達4.63克,GSI為0.12,精巢內已有成熟之精子;雌魚之卵巢重達21.20克,GSI為 0.66,且部分卵粒已發育至油泡(卵黃胞)期。由以上結果判斷,池中養成種魚之可行性相當樂觀。
Abstract:
Milkfish is one of the most important food fishes in Taiwan. there are more than 16,000 ha of culture area and over 160 millions of fry are needed for milkfish farming industry every year. The fry are collected from the sea and also imported from other countries. However, due to several environmental factors, there is unpredictable fluctuation in the occurence of these wild fry. In recent years, the demand for milkfish fry has gone up considerably owing mainly to the fast-growing populations, the nature resource being so limted that there is insufficient supply of stocking materials of this important food fish.
To solve the problem of shortage of milkfish fry. Tungkang Marine Laboratory started the preliminary work on artificial propagation of milkfish in 1970. In addition to capturing wild spawners, the Laboratory has also been raising the adult milkfish in tanks for this objective. After being reared for six years, one male and one female were dissected on 11 April 1976. The male had ripe sperm; the test weighing 4.63g with the GSI of 0.12. The gonad of the female weighed 21.20g with the GSI of 0.66 and part of the ovarian oocytes was found to be at the oil droplet (yolk vesicle) stage. Judging from the condiction of the above female, the feasibility of raising tank-reared spawners was ensured. It is believed that this is the first attempt on the world and is the prelude to successful artisicial propagation by using tank-reared milkfish as spawner.
Relation: pp. 121-132
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44324
Appears in Collections:[廖一久院士專區] 會議論文

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