2012-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/685309摘要：漁業資源為可再生資源，但是在無節制的使用下仍會枯竭。要達到漁業資源的永續利用，必須在漁業捕獲量與魚群族群成長率取得平衡。因此，有效的漁業管理必須包括資源評估，其內容包括評估魚群族群成長率以了解漁業對魚群的可能影響。在台灣，資源評估主要應用在幾種重要遠洋魚種(鮪魚旗魚類)，但沿近海漁業魚種的評估研究相對較少。 我的研究室將針對台灣沿近海魚種，研究魚類生活史、生態學、漁業影響，以提供資源評估的基本資料。我的第一個計畫將研究台灣淡水河口沿海的日本&#40128;Engraulis japonicus仔魚生產量。日本鯷是淡水河口主要的仔魚之一。台大生命科學系的丘臺生教授長期在淡水河口採集日本鯷仔魚，他表示願意提供我樣品（1997-2010）。我的研究將分為兩部分，包括野外調查及分析丘教授的仔魚樣本。我的目標是從這些樣本來估計日本鯷魚卵數量、仔魚數量、仔魚成長率和死亡率。另外，我會設計一個實驗就地估計日本鯷魚卵的孵化率。利用這些生活史參數我將會估計仔魚產量並探討卵和仔魚的數量的關係。 日本鯷的生活史參數在將來可用於評估吻仔魚漁業對仔魚的影響。 另外，我所設計的採樣與研究方法將可應用於研究其他沿近海魚種或不同系統。如此，沿近海漁業的資源評估研究及管理將可逐步提升。 <br> Abstract: The declines of worldwide fisheries resources raise the notion that fisheries production is not limitless. Classical fishery models suggest that sustainable fisheries production requires achieving a balance between a species’ population growth and fisheries harvest. This leads to a suggestion that effective fisheries management must include an assessment program that diagnoses the biological status for a species of concern while accounting for fisheries impact. To date, such assessments have become a routine practice for managing fisheries species worldwide, including Taiwan’s primary ocean fisheries species, tunas and marlins. However, relatively few assessments have been conducted for the coastal fisheries species in Taiwan. Here, I propose to initiate a research program to assess the biological status for the coastal fisheries species in Taiwan. In the initial phase, I plan to study Japanese anchovy Engraulis japonicus larva production in a coastal estuary, Tanshui, of Tanshui River, the largest river in northern Taiwan. The Japanese anchovy is a dominant larval fish in the Tanshui estuary, and there are historical samples available (1997-2010). I will carry out a study that involves both field surveys and laboratory analyses of historical larva samples. Based on these samples, my objectives are to estimate egg production, larva abundance and larval growth and mortality rates. In addition, I will conduct a field experiment that involves in situ incubating to estimate egg hatching rates. Furthermore, I will explore the density-dependent regulation on larval fish abundance. The larval fish abundance is of concern as 1) it determines coastal fisheries production and 2) it constitutes a specialized fishery catch in Taiwan. The results of this project will provide an assessment of the status of the anchovy population in Tanshui, which will have implications on sustainability of larval fish fisheries. Also, comparisons of field and historical samples will enhance current understanding on variation in larva production. A broader contribution is that this project provides a protocol for conducting assessments for coastal fisheries species; i.e., the sampling design and laboratory and analytic methods developed in this project will be applicable to assess various species or in different systems.仔稚魚初期生活史河口族群量調控機制larval fishearly life historyestuarydensity-dependent regulation