農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

我國拖網漁業自民國64年推廣作業以來，迄今在沿近海域已是重要的漁業之一，尤其在基隆、蘇澳、高雄、東港等地區均以此漁業為主力漁業，每年均為地方帶來不少之漁獲收益，然由於近年來岸上污染穢水大量排入海中，加上先前拖網船數之大量增加且大型化、高馬力化，加上網目細小等之過度漁獲情況下，造成沿近海漁場之生態環境遭受嚴重破壞，其魚類資源已明顯呈現枯竭及漁場逐漸萎縮之現象，致使今日拖網漁業每況愈下，漁產量逐年持續下降，而對本漁業引起嚴重之存續問題。近年來，國內即有不少學者專家，針對拖網漁業之魚類資源、漁具、漁法等進行研究探討，但至今仍未能有效解決拖網漁業資源及管理繼續惡化之問題。鑒於此，為確切能突破拖網漁業之作業瓶頸，實有對本漁業之近況進行整體通盤的調查與瞭解，然後再做適當的規劃與輔導，因此，對於台灣周邊水域漁業資源之豐度變動趨勢進行瞭解與監測，進而做為今後漁業資源評估管理、資源增殖規劃及漁業行政決策等之參考依據，如此，方能有效再次發展本漁業，使之恢復昔日豐漁之盛況，而朝著資源管理型漁業的方向邁進。本計畫主要分成四大工作項目，即(1)通盤瞭解小型拖網漁業經營現況；(2)漁場分佈結構與漁業資源變動解析；(3)魚類生物特性研究；(4)建立魚類資訊資料庫；(5)綜合檢討。預期將可瞭解台灣西南海域拖網魚類之族群變動關係，而進一步評估魚類資源量，及檢討本漁業之最大持續生產量與適正漁獲努力量，並提供給漁業行政單位做為制定政策的參考資料。

The small trawl fishery now has been important in coastal waters off Taiwan since 1975.It was one of the main fisheries in Keelung, Suao, Kaohsiung and Tungkang. But, thedemersal fish resources were distinctly exhausted owing to the water pollution andoverfishing. The catchable stocks are gradually decreasing and the fishing conditions oftrawlers are steadily worse.To understand the status of fish resource of small trawl fishery and solve the difficultiesof trawler operation, these experiments were carried out. It is needed to studymonitoring and stock assessment on small trawl fishery resource in the water off Taiwan.These investigated data will provide the fishery administration and will be a basis forestablishing the management policy for small trawl fishery.This program is divided into the following five main subjects: (1) understanding theactual operating state of small trawl fishery, (2) analyzing the construction of fishinggrounds and the change of fishery resources, (3) studying the biological characteristics ofdemersal fishes; (4) establishing the database of the fishes, (5) reviewing the results. It isexpected that this study will be concentrated on assessment effectively of the stock,establishing the productive model of this fishery. The research results will be offered tomanagement regime to develop this fishery of southwestern Taiwan.