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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/15878

Title: 臺灣東北部海域夏季仔稚魚群聚的日週變化之研究
Diel changes in ichthyoplankton assemblages in the water off northeast Taiwan during summer
Authors: Wen-Yu Chen
陳玟妤
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: 仔稚魚;垂直分布;群集分析
ichthyophankton;vertical distribution;Cluster analysis
Date: 2008
Issue Date: 2011-06-30T08:22:08Z
Abstract: 為瞭解台灣東北部海域於夏季時之仔稚魚日週組成特性,於2007年7月31到8月4日間的CR1462、1463共2個航次,分別在湧昇邊緣區、黑潮流域、及沿岸區(宜蘭灣內),以浮游生物採集網(ORI-net)和溫深鹽度計(CTD)來進行仔稚魚的採集和水文資料的觀測,以群集分析和卡方檢定探討臺灣東北部海域仔稚魚群聚與日週垂直分佈的特性。 本次研究水文資料方面,湧昇邊緣表面溫度範圍在23.9度到29.3度間(0~50m),鹽度在34.0到34.6之間變動,黑潮區表面溫度範圍在28.3度到30.2度之間,鹽度在34.3到34.7之間變動,宜蘭灣表面溫度範圍在22.2度到29.6度之間,鹽度在33.7到33.8間。亦即各時間點溫度變化並不明顯,不過鹽度比較上,仍以黑潮區最高,其次為湧昇邊緣,最後為沿岸水域之宜蘭灣。 研究期間共採獲,分屬於75科132類的2,863尾仔稚魚。在仔稚魚群集特性方面,各測站各時間點群集結構並不相同,大致上可將魚群群系分為三群,分別為湧昇邊緣群、宜蘭灣群以及黑潮群。其主要優勢種為:湧昇邊緣為Diaphus B group (14%)、Callionymidae (9%)、Apogonidae (7%)、Diaphus A group (6%)、Gobiidae (4%);黑潮區為Diaphus B group (10%)、Diaphus A group (10%)、Cyclothone alba (7%)、Serranidae (6%)、Vinciguerria nimbaria (4%);宜蘭灣區為Benthosema pterotum (22%)、Hygophum proximum (14%)、Callionymidae (13%)、Gobiidae (11%)、Diaphus B group (5%)。 垂直方面,可以發現許多子稚魚的垂直分布與日光週期有很大的關係,其中以Benthosema pterotum最為明顯,有日週垂直洄游的現象。
This study was carried out in two cruises (CR1462 and 1463) from 31-July 2007 to 4-August 2007 on board of the “Ocean Research II”. We investigated the summertime diel assemblages of ichthyoplankton in the Pacific waters northeast of Taiwan. The range of water temperature was from 23.9 to 29.3C in the surface at the edge of upwelling, from 28.3 to 30.2C in the Kuroshio zone, and from 22.2 to 29.6C in the coastal area (I-Lan Bay). Salinity was higher in the Kuroshio zone than in the vicinity of upwelling and the I-Lan Bay. Total numbers of 2,863 larvae were collected from 3 stations, and 132 taxa contributing to 75 families were identified. The relationships of the ichthyoplankton assemblage between stations could be divided into 3 groups by Cluster Analysis. The most dominant species of each group were Diaphus B group (14%), Callionymidae (9%), Apogonidae (7%), Diaphus A group (6%), and Gobiidae (4%) at edge of upwelling zone; Diaphus B group (10%), Diaphus A group (10%), Cyclothone alba (7%), Serranidae (6%), and Vinciguerria nimbaria (4%) in the Kuroshio zone; Benthosema pterotum (22%), Hygophum proximum (14%), Callionymidae (13%), Gobiidae (11%), and Diaphus B group (5%) in the I-Lan Bay. The vertical migration of larvae was observed in Benthosema pterotum and Diaphus spp. The alternate migration of Diaphus A and B group suggested that separation of habitat at larval stage might be effective in reducing cannibalism.
URI: http://ethesys.lib.ntou.edu.tw/cdrfb3/record/#G0M96310002
http://ntour.ntou.edu.tw/ir/handle/987654321/15878
Appears in Collections:[環境生物與漁業科學學系] 博碩士論文

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