This study is aimed to investigate the species composition and seasonal distribution of siphonophores in relation to water temperature and salinity in the coastal waters, southwestern Taiwan, from June 2001 to October 2002. In total, 39 siphonophoran species belonging to 17 genera and 5 families were identified, with the mean total abundance of 5301¡Ó8525 ind./100m3. The numerical abundance of siphonophores showed apparent seasonal change, higher in spring and autumn and lower in winter. The five most dominant species were Chelophyes contorta, Lensia subtiloides, Sulculeolaria chuni, Bassia bassensis and Diphyes bojani, and contributed to 80.2% of the total abundance of siphonophores.
The mean abundance and species number of siphonophores were higher in surface water than in 0~100m oblique tow. The siphonophores found in the present study mostly belonged to the widespread oceanic species or widespread coastal species, and the dominant species were similar to those in the South China Sea. The dominant siphonophoran species exhibited apparently seasonal succession. Different dominant species showed different seasonal distribution patterns and percentage composition of sexual and asexual generations in total population.
The total abundance of siphonophore showed significant (p>0.05) correlation with water salinity, but not temperature. The abundance of Chelophyes contorta, Lensia subtiloides, Abylopsis eschscholtzi and Diphyes chamissonis were significantly correlated to water temperature, but the abundance of Sulculeolaria chuni and Abylopsis tetragona showed significantly negative correlations with temperature. The abundance of Chelophyes contorta, Lensia subtiloides and Abylopsis eschscholtzi were significantly negatively correlated to salinity, but Sulculeolaria chuni showed significantly positive correlation with salinity.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0904103-154813 |
| Date | 04 September 2003 |
| Creators | Tung, Shu-Rung |
| Contributors | Jiang-Shion Hwang, Shinn-Pyng Yeh, Chang-tai Shih, Wen-tseng Lo |
| 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-0904103-154813 |
| Rights | unrestricted, Copyright information available at source archive |
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