本研究選定設置於台灣西南部沿岸海域之滿豐定置漁場為研究對象。從定置漁場年月別浪人鰺漁獲產量變化、CPUE時序列變動、不同體型大小、大小潮漁況等，來探討分析漁場浪人鰺來游資源變動差異之原因。取樣的漁獲統計資料，自2004年10月起至2012年6月止，總計八年度之原始日別漁獲資料及大小潮記錄資料。結果發現小潮期浪人鰺之平均漁獲量顯著高於大潮期之平均漁獲量。各年度5月及6月小潮浪人鰺平均漁獲量顯著較其他月份及大潮平均漁獲量高（p＜0.01）。推斷滿豐定置漁場在小潮期間，浪人鰺漁獲量越高；尤其在各年度5月及6月為豐漁期，且主要為大體型浪人鰺。

Relationship of tidal change and catch of Giant trevally (＂Caranx ignobilis＂) at Mangfong set-net fishing company in the southwestern Taiwan waters (Chuken village, Pingtung County) was studied. Factors, including annual and monthly catch, changes of Catch per unit effort (CPUE) time series, and different body sizes and fishing conditions at spring and neap tides, contributing to the variation of catch in Giant trevally were investigated and analyzed in the set-net fishery. Catch data were sampled from October, 2004 to June, 2012 with a total of 8 years on catch amount and tidal change. Average catch amount was significantly higher in neap tide compared to spring tide duration. Catch amounts were highest in May and June when neap tide as compared to other months in spring tide (p＜0.01). Catch amount of Giant trevally in Mangfong set-net fishing company became higher and predominantly large-sized in neap tide duration, especially in May and June.