調查方法對長期監測至關重要，不同方法所得出結果會讓我們對生態系的狀況作出不同的解釋，我們發現在台灣地區較少研究使用誘餌式遠端水下攝影系統來調查珊瑚礁魚類。本研究旨在比較誘餌式遠端水下攝影系統(Baited Remote Underwater Video, BRUV)和水下視覺普查(Underwater Visual Census, UVC)在不同珊瑚礁地區和季節間其魚類組成是否有差異。在墾丁國家公園和小琉球地區各三個樣點進行四季的BRUV和UVC調查。結果顯示BRUV相比UVC平均記錄到多1.8倍的魚類物種數，兩種方法的魚類群聚有很大差異:UVC紀錄到較多雀鯛科魚類，在BRUV記錄到較高比例的高營養階級魚類和草食性魚類，這與各自的調查機制相關。BRUV在春季相比秋季和冬季紀錄到紀錄較少的魚類多樣性。BRUV和UVC同時記錄到墾丁和小琉球的魚類食性位階組成的不同，小琉球有較高比例的草食性、浮游食性魚類，也記錄到小琉球有較高的藻類覆蓋率。UVC因為調查方法涵蓋較多珊瑚面積，因而相比BRUV更能觀察到底棲覆蓋率與魚類群聚的相關性。將兩種方法結合使用時，除了能獲得更全面的魚類群聚資料外，也能了解珊瑚礁生態系的變化。

Long-term ecological monitors are crucial for understanding the ecosystem, and different survey methods produce different results for examining different aspects of the environment. Baited remote underwater video systems (BRUV) are not commonly used in Taiwan for surveying coral reef fish. This study aims to compare the fish communities using BRUV and underwater visual census (UVC) across different coral reef areas and seasons. BRUV and UVC surveys were conducted in three sites each in Kenting National Park and Xiaoliuqiu across four seasons. BRUV recorded on average 1.8 times more fish species richness than UVC. There were significant differences in fish assemblages between the two methods: More damselfishes were recorded in UVC, higher proportions of high trophic level and herbivorous fish were recorded in BRUV. This resulted probably from their different survey mechanisms. BRUV recorded less fish species richness in spring compared to autumn and winter. Both BRUV and UVC recorded differences in the trophic composition of fish between Kenting and Xiaoliuqiu, with Xiaoliuqiu having higher proportions of herbivorous and planktivorous fish, as well as higher algal coverage. UVC, covering more coral area in its methods, allowed better observation of the relationship between benthic cover and fish assemblages when compared with BRUV. Combining both methods could provide more comprehensive fish assemblage data and a more complete understanding of changes in coral reef ecosystems.

論文審定書 i
誌謝 ii
摘要 iii
Abstract iv
目錄 v
表目錄 vii
圖目錄 viii
第一章、前言 1
1.1珊瑚礁魚類 1
1.2長期監測重要性 1
1.3水下視覺普查 2
1.4誘餌式遠端水下攝影系統 3
1.5地區和時間的差異 3
1.6底棲覆蓋率與魚類組成 4
1.7目標 4
第二章、材料與方法 5
2.1調查時間與地點 5
2.1.1調查地點 5
2.1.2調查時間 5
2.2調查方法 5
2.2.1誘餌式遠端水下攝影系統 5
2.2.2水下視覺普查 6
2.2.3底棲生物覆蓋率調查 6
2.3資料處理與統計 6
2.3.1影片分析 6
2.3.2魚種食性位階 7
2.3.3魚類群聚組成 7
2.3.4兩種魚類調查方法的差異 8
2.3.5魚類群聚聚類分析 8
2.3.6兩種魚類調查方法的魚類群聚空間差異 8
2.3.7兩種魚類調查方法的魚類群聚時間差異 9
2.3.8底棲覆蓋與魚類群聚的關係 9
第三章、結果 10
3.1魚類數量與種類 10
3.2魚類群聚指標分析 10
3.3魚類食性比例 11
3.4群聚分析 11
3.5不同地區的魚類群聚差異 12
3.6不同季節性的魚類群聚差異 14
3.7調查方法對底棲覆蓋率-魚類的關係 15
第四章、討論 17
4.1兩種調查方法的差異 17
4.1.1生物多樣性的差異 17
4.1.2食性位階的差異 17
4.1.3調查時間的差異 18
4.2兩種方法在地區間的差異 18
4.3兩種調查方法季節的差異 19
4.4底棲覆蓋與魚類群聚的關係 19
4.5面臨的挑戰 20
4.6未來的應用 21
第五章、結論 22
參考文獻 23
附錄 66

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