中文摘要
屏東大鵬灣內之水文環境有明顯濕季(6~9 月)及乾季(10 ∼5 月)之
分，在濕季時灣內鹽度可低至21 ‰左右，乾季則都有33 ‰的鹽度。年
平均溫度、鹽度及葉綠素a 濃度分別為26.9 ℃、29.7 ‰及2.24 μg/L 。所
採得之浮游橈足類共鑑定出3 目18 科36 種，其中包括16 個僅鑑定到
科或屬的種類，平均豐度為5.8 ±8.4 x10
5
ind./100m
3 。灣內橈足類多為
暖海性種類，主要優勢種為Acartia tsuensis 、Paracalanidae 幼生體
(copepodite)、Acartiidae 幼生體、Parvocalanus crassirostris 、Oithonidae
幼生體、Oithona dissimilis 、橈足類無節幼蟲、Acrocalanus indicus 及
Zausodes spp.，合佔橈足類總豐度的81%。主要優勢種之季節性變化大
致隨溫度增加而增加； Acartia tsuensis 及Acartiidae 除在濕季時豐度較
高外，其他種類在濕季時豐度都略低於乾季；而乾季時海月水母會使南
站及中站橈足類豐度明顯降低。灣內三測站之主要種類組成有差異，南
站主要以養殖魚池種及嗜高溫低鹽性種為主，中站主要以橈足類幼生為
主，口站則以高溫高鹽種類為主。漲退潮對於灣內浮游動物之豐度有影
響，當灣內種數量較多時，漲潮之豐度會低於退潮時，而沿岸種較多時
則呈相反趨勢。灣內橈足類對於浮游植物之攝食衝擊變動很大，介於
0.04 ∼40.62 % day 之間。

ii
Abstract
Tapeng Bay has distinct dry (October to May) and wet (June to
September) seasons. The salinity was 33‰ in the dry season, but may as
low as 21‰ during the wet season. The yearly average temperature,
salinity and chlorophyll a of Tapeng Bay are 26.9 ℃, 29.7 ‰ and 2.24 μg/L
respectively. Thirty-six species of copepods belonging 18 families and
three orders plus 16 unidenitified species were found in the materials of this
study. The average abundance of copepods was 5.8 ±8.4 x10
5
ind./100m
3
.
The nine most dominant species were Acartia tsuensis , Paracalanidae
(copepodites), Acartiidae (copepodites), Parvocalanus crassi rostris ,
Oithonidae (copepodites), Oithona dissimilis , n auplius, Acrocalanus indicus
and Zausodes spp., contibuting to 81% of the total copepods. Majority of
the dominant species exhibited clear seasonal changes in abundance, varying
positively with temperature. Acartia tsuensis and Acartiidae were
dominant species in station N in the wet season, but other dominant species
had higher abundance in the dry season. Aurelia aurita (Cnidaria,
Scyphozoa) which was dominant in the dry season, may play the role of a
keystone species at stations S and C. Species composition was different
among stations. Fish-pond species was dominant at station S, copepodite
and nauplii, and neritic species at station N. The abundance of copepods
may be influenced by tidal action. When inlet species abundance is higher
than neritic species, total copepod abundance at high tide is lower than at
low tide, but the trend is reverse for neritic species. The grazing impact of
copepods on phytoplankton was 0.04 to 40.36 % per day.

目錄
章次………………………………………………………………頁數
前言……………………………………………………………… 1
材料與方法……………………………………………………… 6
結果……………………………………………………………… 11
討論……………………………………………………………… 22
結論……………………………………………………………… 35
參考資料………………………………………………………… 37
附圖……………………………………………………………… 45
附表……………………………………………………………… 61
附錄………………………………………………………….. …………. 77

37
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