| LIN Mao,LIN Rongcheng. 2006. Seasonal abundance and distribution of pelagic tunicates (Chordata: Thaliacea) in the central South China Sea. Acta Oceanologica Sinica, (3):148－156 |
| Seasonal abundance and distribution of pelagic tunicates (Chordata: Thaliacea) in the central South China Sea |
| Seasonal abundance and distribution of pelagic tunicates (Chordata: Thaliacea) in the central South China Sea |
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| DOI： |
| Key words:South China Sea tunicates abundance and distribution |
| 中文关键词: South China Sea tunicates abundance and distribution |
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| Abstract: |
| A total of 168 macro-zooplankton samples from 42 stations in the central South China Sea (12°~20° N, 111°~118° E, an area of about 64×104 km2) were collected in September 1983 (autumn), April 1984 (spring), August 1984 (summer) and December 1984 (winter). Twenty-three species and subspecies of tunicates were found, of which Thalia democratica complex (including T. d. orientalis and T. d. echinata) and Doliolum denticulatum were the dominant species, and accounted for 95.7%,90.0%, 91.8% and 90.5% of the total tunicates found in autumn, winter, spring and summer, respectively. The highest abundance (with a mean of 2.37 ind./m3) occurred in autumn. There are strong correlations between the abundances of the tunicates and those of phytoplankton and chlorophyll a concentration. However, tunicates also aggregate in areas with low primary production in the autumn survey, probably due to the water circulation pattern. |
| 中文摘要: |
| A total of 168 macro-zooplankton samples from 42 stations in the central South China Sea (12°~20° N, 111°~118° E, an area of about 64×104 km2) were collected in September 1983 (autumn), April 1984 (spring), August 1984 (summer) and December 1984 (winter). Twenty-three species and subspecies of tunicates were found, of which Thalia democratica complex (including T. d. orientalis and T. d. echinata) and Doliolum denticulatum were the dominant species, and accounted for 95.7%,90.0%, 91.8% and 90.5% of the total tunicates found in autumn, winter, spring and summer, respectively. The highest abundance (with a mean of 2.37 ind./m3) occurred in autumn. There are strong correlations between the abundances of the tunicates and those of phytoplankton and chlorophyll a concentration. However, tunicates also aggregate in areas with low primary production in the autumn survey, probably due to the water circulation pattern. |
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