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題 名 | Demersal Fish Assemblages by Bottom Trawler off Western Tung-Sha Tao: A Case Study=東沙島西部底棲性魚類群社組成之個案研究 |
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作 者 | 李嘉林; | 書刊名 | 水產研究 |
卷 期 | 3:2 1995.12[民84.12] |
頁 次 | 頁83-93 |
分類號 | 439.22 |
關鍵詞 | 底棲魚類; 群社; 歧異度; 東沙島西部; Demersal fish; Assemblages; Diversity; West Tung-Sha Tao; |
語 文 | 英文(English) |
中文摘要 | 本研究之主要目的旨在探討東沙島西部小範圍之陸坡漁場魚種群社組 成。1995 年 4 月18 至 19 日調查期間,於 20o 20' N–20o 40' N,115o 30' E– 115o 50' E,水深 400至 450 公尺之海域,實施 6 網次底拖網漁撈試驗。魚類 及蝦類之線性生物量分別大於20.0 及大於 5.0 且於兩測站以上同時出現者, 魚類計有 8 種,佔魚類總漁獲量的 83.5%;蝦類 3 種,佔蝦類總漁獲量的 94.7% 。各測站之夏農•魏能 (Shannon-Wiener) 歧異度指數與各測站間之差異 不顯著。群社分析結果顯示,主要魚種與蝦類組成均可區分為 2 組群社。依魚 種別之對數線性生物量可將所調查測站群社區分為 1 組;依蝦種別分析所獲得 之測站群社組數亦同。 |
英文摘要 | The main purpose of this study was to understand the characteristics of demersal fish assemblages in the area near west Tung-Sha Tao, South China Sea, with six bottom trawl operations along a transect at depths of 400-450 meters during 18-19 April 1995. A total of 8 major fish species and 5 prawn species occupying 74.9% and 9.7% of the total collected species were recorded respectively. The species found at duplicated stations of which the total linear biomass were greater than 20.0 for fish and 5.0 for prawn were selected for the cluster analysis. The relationship between the values of Shannon-Wiener's index and the sampling stations had no significant difference (p>0.05). Using the unweighted pair group method arithmetic average (UPGMA) and the Bray-Curtis dissimilarity values, 6 trawl operation stations were grouped into 1 cluster and 8 fish species and 5 prawn species were classified into 2 groups respectively. Based on the catch percentages and cluster analysis, the study area may be considered as one of the major habitats of hairtail Trichiurus lepturus. |
本系統中英文摘要資訊取自各篇刊載內容。