農業部水產試驗所全球資訊網

本研究之目的係探討高屏沿岸海域仔稚魚之種類組成和數量分布及其與溫度、鹽度、葉綠素a、橈足類豐度與海流等水文環境或生物因子之相關性。由1999年6月至2001年6月期間，於高屏海域7個測站所做的調查研究，共發現仔稚魚69科130屬 184種，測站平均豐度為391 ± 75 ind/100m³。整體來看，仔稚魚豐度呈現明顯的季節性變化，於冬季 (12月) 時最低，然後逐漸增加，夏季 (6月) 時達到最高峰。仔稚魚主要物種為Sillago japonica、Engraulis japonicus、Tridentiger obscurus、unidentified Gobiidae、Pagrus major、Scomberoides lysan、Leiognathus nuchalis、Ceratoscopelus warmingi、Scatophagus argus及Diogenichthys laternatus，這10個魚種佔仔稚魚總數的67%。多數之優勢種仔稚魚豐度與水域溫度、葉綠素a及橈足類豐度成顯著正相關，與鹽度成顯著負相關，推測高屏海域仔稚魚群聚組成及豐度之分布情形，明顯受乾、溼季降雨量多寡及浮游生物數量的影響。

摘要abstract(英) This study investigated the species composition and distribution of ichthyoplankton in relation to seawater temperature, salinity, chlorophyll a, and copepod abundance in Kaoping coastal waters. One hundred and eighty-four larval fish species, belonging to 130 genera and 69 families, were identified in the study. The mean abundance was 391 ± 75 ind./100m³ during the sampling period between June 1999 and June 2001. Generally, the ichthyoplankton abundance showed significantly seasonal changes, with lowest in winter and up to highest value in summer. The 10 most significant taxa were Sillago japonica, Engraulis japonicus, Tridentiger obscurus, unidentified Gobiidae, Pagrus major, Scomberoides lysan, Leiognathus nuchalis, Ceratoscopelus warmingi, Scatophagus argus, and Diogenichthys laternatus, and accounted to 67% of the total ichthyoplankton abundance. The correlation coefficients showed that total abundance of ichthyoplankton and the most dominant taxa were positively related to temperature, chlorophyll a, and copepod abundance but negatively related to salinity. It suggested that the amount of rainfall and food source may be key factors to determine the abundance and distribution of ichthyoplankton in Kaoping coastal waters.