Eco-Geographic Difference of Larval Fish Assemblage in the Coastal Waters of the Western Central Taiwan

臺灣西部中區沿岸仔稚魚群集的生態地理差異

黃俊彬(Jiunn-Bin Hung) ； 丘臺生(Tai-Sheng Chiu)

《臺灣水產學會刊》 18卷4期 (1991/12) Pp. 241-256

https://doi.org/10.29822/JFST.199112.0001

摘要

本文係報導1989年8月至1990年9月間採自淡水河口及隣近海域1,362尾花身鷄魚胃內含物分析之研究結果。花身鷄魚因具强銳之上下頜齒及咽頭齒，排列稀疏之粗短鰓耙以及因擁有較短之腸部等特性足可强列證實該種魚屬肉食性，且於長成後有成為專一魚食性之趨勢。小於二公分之幼魚多食浮游性之橈足類及端足類。隨着魚體之逐漸成長則改食蝦蟹類幼苗，仔稚魚，軟體動物幼苗以及多毛類之幼苗。胃含物所見到之較大型魚類，則僅能為較大型之花身鷄魚所捕食。這些大花身常見有攻擊其他魚體刮食體鱗之習性。花身鷄魚之幼魚所嗜食之甲殼類幼苗在河口域甚為豐富，可能與淡水河下游紅樹林所扮演之生態角色有密切的關連。

關鍵字

出現 ； 地區變異 ； 仔稚魚 ； 潮間帶 ； 臺灣海岸

並列摘要

In this paper,feeding habits of Terapon jarbua were studied in theestuary of Tanshui River and its adjacent inshore bays from August 1989 toSeptember 1990.The strong mandibular,maxillary and pharyngeal teeth,thewidely spaced short gill rakers as well as the short intestine strongly suggestthat T.jarbua is a carnivore,with a tendency of being solely piscivorous inlarge adult.The juvenile below 2 cm SL feeds principally on planktoniccopepods and amphipods.As the fish grew,there was a general tendency toeat crustaceans mainly juvenile shrimps(mysis)and crabs(megalopa),followedby young fishes,young molluscs and young polychetes.The large-sized fishelements as a source of food are only taken by large T.jarbua which mayeven attack larger fish of its own kind for scales.Larval and juvenilecrustaceans are abundant in the area,which may be partly due to theecological role played by mangrove forest in the lower reach of the river.

並列關鍵字

Occurrence ； Regional Variation ； Fish Larva ； Intertidal Zone ； Coast of Taiwan