濁水溪河口仔稚魚之出現

Occurrence of Fish Larvae in the Estuary of Jwo-Shoei River

陳正修(Cheng-Shou Chen)

《臺灣水產學會刊》 13卷1期 (1986/06) Pp. 11-20

https://doi.org/10.29822/JFST.198606.0005

摘要

本報告為1982年11月起1983年10月止一年間，於濁水溪河口實施稚魚網表層採集所得之結果。
1.每月採集一次，共得魚卵5904個，仔稚魚22種2145尾。魚卵分類上尚有困難，其出現量，冬季最多，夏季次之，春秋兩季最少。仔稚魚方面，屆里銀帶鰶是優勢種，其次是劍鰶。鰕虎類、韋駄鳚、青沙鮻和石首魚類也有多量出現。
2.仔稚魚的種類數，冬春兩季多而夏秋兩季少，出現之尾數冬季最多，夏秋兩季次之，春季最少。冬季之仔稚魚以劍鰶、鰕虎類、石首魚類和左鮃類為主。到也春季，以韋駄鳚、劍鰶、屆里銀帶鰶和日本鮆佔多數。夏季之仔稚魚中，屆里銀带鰶約佔一半，其他青沙鮻、鰕虎類、鼠銜魚類也有多量出現。秋季裏，屆里銀帶鰶為優勢種，其他鰕虎類、青沙鮻和石首魚類亦有多量出現。
3.濁水溪河口之仔稚魚，在一年之中，出現期間短之種類佔多數，出現期間長之種類少。

並列摘要

In order to clarify the occurrence of fish eggs and larvae in the estuary of the Jwo-Shoei river, samples were collected with a larval net at surface, layer of the estuary once a month from Nov. 1982 to Oct. 1983. A total of 5904 eggs were collected during the period. The number of eggs were more abundant in winter than in other seasons. A total of 2145 fish larvae comprising 22 species were collected during the period. The major species were as follows: Stolephorus tri (BLEEKER), Thrissocles sp., gobiids, Omobranchus japonicus (BLEEKER), Sillago japonica TEMMINCK & SCJ4LEGEL, and sciaenids. The seasonal occurrence of major species were Omobranchus japonicus (BLEEKER), Thrissocles sp., Stolephorus tri (BLEEKER), and Engraulis japonic TEMMINCK & SCHLEGEL in spring; Stolephorus tri(BLEEKER), Sillago japonica TEMMINCK & SCHLEGEL, gobiids, and callionymids in summer; Stolephorus tri (BLEEKER), gobiids, Sillago japonica TEMMINCK & SCHLEGEL and sciaenids in fall; and Thrissocles sp,. gobiids, sciaenids and cynoglossids in winter.