東海南區·臺灣海峽產白口魚食性之研究

The Feeding Habit of White Croaker, Argyrosomus argentatus (Houttuyn), of the Southern East China Sea and Taiwan Strait

曾萬年(Wann-Nian Tzeng) ； 劉錫江(Hsi-Chiang Liu)

《臺灣水產學會刊》 4卷2期 (1976/06) Pp. 53-59

https://doi.org/10.29822/JFST.197606.0007

摘要

本報告爲東海南區、臺灣海峽產白口魚食性之研究，其結果如以下所述；
(1)本種魚之餌料生物，主要爲蝦類，其次爲魚類，再其次爲蟹類之幼體，蝦姑及其他少數軟體動物等底棲性動物。
(2)食性不因性別不同而有所差異。
(3)在成長過程中，白口魚對魚類之捕食率有增加之傾向。而且隨着白口魚體長之增加，被食魚之體長也有增大之現象，其關係如下：
Y=0.6848 X-4.2046．
Y=被食魚體長上限，
X=白口魚體長。
(4)東海南區、臺灣海峽之白口魚，其胃內餌料生物組成有顯著的地域性差異。
(5)東海南區產白口魚食性之季節變化不明顯。

並列摘要

Samples of white croaker, Argyrosomus argentatus (Houttuyn), were collected monthly from the catches of bull trawlers operating in the southern East China Sea and Taiwan Strait from January 1973 to December 1974.
The feeding habit of the collected species was investigated by an occurrence method and weight method, and results are summarized as follows:
(1). The food organisms found in the stomachs of white croaker were mostly benthos. Shrimps were the most abundant, followed by fishes. Small crabs, squillas and squids were found occasionally.
(2). There were no differences in the diet between males and females.
(3). With the growth of the white croaker, the frequency and the body size of fishes in their stomachs increased. The relation between the size of predator and the size of prey was:
Y=0.6848X-4.2046,
where Y=the upper limit of fork length of prey in cm
and X=the total length of white croaker in cm
(4). There were significant differences in the diet between the fish caught from the southern East China Sea and Taiwan Strait.
(5). No seasonal variations occurred in the diet of white croaker in the southern East China Sea.