Preliminary Study on Temporal Variation of Ichthyoplankton Density and Composition in the I-lan Bay,Taiwan

宜蘭灣浮游魚類密度及種類組成時間變異的初步研究

丘臺生(Tai-Sheng Chiu) ； 張光瑢(Kwang-Zong Chang)

《臺灣水產學會刊》 19卷3期 (1992/09) Pp. 155-164

https://doi.org/10.29822/JFST.199209.0001

摘要

本研究係由海研一號研究船1990年8月OR248航次及海富號試驗船1991年8月HF271F航次採得共計約17公斤之漂流藻及其附著之魚類、魚卵進行分析所得之結果。OR248航次計採6225尾魚類標本，可鑑定的6221尾，有6科、5屬、6種魚種，其中有6181尾是剛孵化的鯔科魚苗，而花鰧有28尾。HF271F航次共採163尾魚，計有11科、16屬、16種魚，其中以單尾單棘魨為優勢種（佔54.9％），其次花鰧（14.8％），五線雀鯛（6.8％）及鈍頭鳚（5.6％）。經比較OR248航次（較離岸）的魚種少，數量多，而HF271F航次（較近岸）的魚種多，數量少，而且兩航次均有大量仔或稚魚出現，另外OR248航次有一測站採得之漂流藻上滿佈魚卵及鲻科魚苗，足見漂流藻和魚類產卵，仔稚魚及成魚間有密切關係。為能進一步探討漂流藻和魚類間的關係，需要更多的採樣（如不同季節及水域的採樣）以便進行有系統的分析。

關鍵字

時間變異 ； 浮游魚類 ； 密度 ； 組成 ； 宜蘭灣

並列摘要

A dipnet(diameter 80 cm,length 100 cm and mesh 1 cm)was used to collectdrifting seaweeds and their attached fish and fish egg off northeastern Taiwanby R.V.Ocean Researcher 1,cruise OR248 in August 1990 and R.V.Hai-Fu,cruise HF271F in August 1991.In cruise OR248,6223 collected fishes wererepresented by 6 families and 6 species.The Mugilidae larvae were the mostdominant species containing 99.3% of the total samples.Histrio histrio wasthe second most species(0.4%).In cruise HF271F,163 fishes were sampledand contained 11 families and 16 species.Aluterus scriptus was the mostdominant species occuping 53.1% of the total fishes,followed by H.histrio(14.8%),Abudefduf vaigensis(6.8%)and Petroscirtes breviceps(5.6%).It appearedthat offshore cruise(OR248)had less species but large number of fish whileinshore cruise(HF271F)had more species and less fish.Moreover,largeamount of larval and juvenile fish occurred in both cruises,and a great dealof fish eggs were attached on drifting seaweeds.This result revealed thatthere is a close association between fish egg and larval,juvenile and adult fishand drifting seaweed.

並列關鍵字

Temporal Variation ； Ichthyoplankton ； Density ； Composition ； I-lan Bay