碩士 / 國立中山大學 / 海洋資源學系研究所 / 91 / The purpose of this study is to investigate the wintertime distribution of the fish eggs along the coast of southwestern Taiwan, and to elucidate the fish spawning ground in this area. Moreover, the distribution of striped mullet eggs was also investigated.
Two kinds of sampling methods were used in this study, including the surface and vertical trawling. The former applied vertical and oblique towing along the coastline. One sampling was proceeded in November, December 2000, and January 2002 by R/V Ocean Researcher 3 at three transects vertically along the coastline at 10 to 1140 meters deep in Budai, Jiading, and Fangliau. The other was proceeded in November 2000, January, December 2001, and January 2002 parallelly along the coastline at 8 sites from Budai to Fangliau. Besides, the vertical sampling employed in December 2001 and January 2002 by R/V Ocean Researcher 1 in the Taiwan Strait was also analyzed. A total of 5909 fish eggs were obtained from three sampling nets, NORPAC, cyclindricalconic net, and bongo net.
All together 4 families, 2 genera, and 2 species of fish eggs, including Myctphiformes Synodontidae, Engraulidae, Tetraodontiformes Tetraodontidae, Scorpaeniformes Triglidae, Muglidae, Clupeiformes chirocentru hyposelosoma, Salmoniformes Polyipnus polli, and Allopus japonicus were found. The fish eggs that couldn’t be identified were sorted into 41 groups by the egg shape, size, and membrane pattern. The four most abundant fish eggs were Muglidae, Engraulidae, dead eggs, and group CV.
The fish eggs abundance decreased from inshore to offshore at two transects in Jiading and Fangliau. But it was contrary at the transect of Budai. The same pattern also appeared in the distribution of Muglidae eggs. In the area of inshore water where waterdepth from 15 to 25 meters, higher abundance of total eggs, Muglidae, and Engraulidae were found at the southern site. Muglidae eggs were the most abundant in December, but Engraulidae eggs didn’t appear in this month.
33 fish eggs that might be striped mullet were sampled by OR1 at the edge of 21 ℃ isotherm where China Coastal Current met Kuroshio Current. The hydrographic variation in the year from 2000 to 2001 was affected by tides and topography, whereas in the year from 2001 to 2002 was influenced by Kuroshio. Higher fish eggs abundance found at Linyuan may due to the turbulence of Kao-Ping submarine canyon.
| Identifer | oai:union.ndltd.org:TW/091NSYS5277010 |
| Date | January 2003 |
| Creators | Mei-Yu Chang, 張美瑜 |
| Contributors | Meng-Hsien Chen, 陳孟仙 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 107 |
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