頁籤選單縮合
題 名 | Offshore Ichthyoplankton Assemblages Along Northeast and Southwest Transects over the Shelf Break of North Taiwan=臺灣北部海域大陸棚邊緣東北及西南走向兩斷面之浮游魚類群集 |
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作 者 | 葉信平; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 21:2 1994.06[民83.06] |
頁 次 | 頁169-181 |
分類號 | 439.2 |
關鍵詞 | 離岸浮游魚類群集; 斷面; 臺灣北部海域; Offshore ichthyoplankton assemblages; Transect; North Taiwan; |
語 文 | 英文(English) |
中文摘要 | 在臺灣北部域大陸棚邊緣東北及西南走向兩斷面之浮游魚類調查係在海研一號1991年12月之304航次中以Maruchi型仔稚魚網進行。共計補獲1072尾仔稚魚及419個魚卵。其中仔稚魚鑑定有57科的169種魚。最優勢科有燈籠魚(29.5%)及鑽光魚(24.0%),另9個次優勢科佔17.2%。優勢魚種以七星底燈魚(14.9%),鑽光魚(11.9%)及串燈魚(9.0%)為主,另16種(27.2%)為輔。除了一陸棚測站無仔稚魚及一陸坡站無魚卵記錄外,七星底燈魚及鑽光魚之豐度(尾數╱千立方米海水)在陸棚海較高,而串燈魚則在陸棚及陸孝區較高,其他十六種次優勢魚在兩斷面之豐度較小且分不均。魚卵的豐度在陸棚區較在陸坡區高。除西南斷的面的二測站外,大部份測站之魚種數相當高(>26)。在歧異度及均勻度方面,在西南及東北斷面的陸坡區及淺水區較高。由斷面溫、鹽圖來看,溫度湧昇現象分發生在兩斷面中區海域。而高鹽水則分佈於上表層(>200m水深)水域中。本研究果顯示洋流輸道在調節仔稚魚群體結構上扮演一相當重要角色。由9個測站的19種優勢魚種去作聚類分玎可得到三個測站及魚種群集。但其中有一沿岸測站獨立於三個測站群體外。 |
英文摘要 | Ichthyoplankton survey was made by a Maruchi-type larval net along northeast (NE) and southwest (SW) transects in shelf break off north Taiwan by R.V. Ocean Researcher 1. 304 cruise, during December 9-11, 1991. In total, 1072 fish larvae and 419 fish eggs were collected. The former comprised of 57 families representing 169 taxa. Of the 57 familites, myctophid (29.5%) and gonostomatid (24.0%) were the two most numerous ones. The rest nine major families offered little contribution (17.2%.)Nienteen larval taxa were selected as dominant species. Among them, Benthosema pterotum (14.9%), gonostoma gracile (11.9%), and Vincigucerria nimbaria (9.0%) were the three most abundant species. Except of one shelf st. with no larva record and one slope st. with no fish egg collection, higher abundance (number of fish or egg/1000m3 ) of B. pterotum and G. gracile were in shelf areas, while V. nimbaria were found in shelf and slope areas. The fish egg abundance was relatively higher in SW transect than in NE transect. Except two stations (SW stransect), most surveyed stations had relatively high taxon number. The larval diversity and evenness indices were higher at slope stations (SW transect) and toward shallow station (NE transect). An upwelled of isotherms and a saline water (>34.50%) above 200 m depth occurred in both transects. It is believed that the current transport might play animportan role to regulate the community structure of larval fish between slope and shelf area. Based on 19 major larval species (>1.0%) abundance from 9 stations, three station and species groups were classified. Only coastal station was excluded from the three station groups. |
本系統中英文摘要資訊取自各篇刊載內容。