The population dynamics and the feeding of the scyphomedusa Aurelia aurita in Tapeng Bay, southwestern Taiman, were investigated from April, 1999 to April, 2000 and May, 2001 to April, 2002. A. aurita distributed mainly in the inner water of the Bay. The average abundance of A. aurita was 71¡Ó256 ind.100m¡Ð3, with higher abundance in winter and spring than in summer and autumn. The abundance of A. aurita showed no significant correlation with hydrographic features, but it seems to have one or two month¡¦s time lag with the seasonal distribution pattern of copepods. The main reproduction period of A. aurita was form autumn to next spring. The occurrence of ephyra was mainly in winter and spring, with maximum abundance of 328 ind./100m3. The average bell diameter of A. aurita was 13.9¡Ó4.2 cm. The size of bell diameter varied seasonally, generally had larger size in autumn and smaller size in spring. Seventeen zooplankton taxa were found in the stomach contents of A. aurita, copepods were the most dominant (70.3%), followed by copepods nauplius (20.1%), bivalve larva (3.0%) and fish eggs (2.3%). The average ingestion rate of A. aurita was 2165¡Ó2673 prey ind.-1 day-1 , the feeding impact of A. aurita on zooplankton was 14.69 % ~ 40.84 % %, with no significant difference among sizes.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0909102-132716 |
| Date | 09 September 2002 |
| Creators | Cheng, Yi-Ling |
| Contributors | Wen-Tseng Lo, C.T. Shih, none, J. S. Hwang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0909102-132716 |
| Rights | unrestricted, Copyright information available at source archive |
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