Zoological Studies

Vol. 48 No. 4, 2009

Temporal Changes in Nudibranch Composition at a Coastal Site off Penghu (the Pescadores) in the Taiwan Strait

Yeng Su1, Li-Jin Huang2, Yen-Wei Chang2, and Hin-Kiu Mok2,*

1Department of Marine Sport and Recreation, National Penghu University, Magong, Penghu 880, Taiwan
2Institute of Marine Biology and Asia-Pacific Ocean Research Center-Kuroshio Research Group, National Sun Yat-sen University, 70 Lianhai Rd., Kaohsiung 804, Taiwan

Yeng Su, Li-Jin Huang, Yen-Wei Chang, and Hin-Kiu Mok (2009) In total, 74 nominal species and 7 possible new species of sea slugs were recorded at a site off the coast of Wai-an in Penghu (the Pescadores) in the Taiwan Strait from 20 survey dives (including 17 monthly surveys).  The Chromodorididae and Phyllidiidae were the 2 most-speciose families.  The mean number of species sighted per monthly survey was 12.  The increase in new species recorded reached a plateau at the 18th survey.  The number of families recorded per survey ranged 2-9.  High nudibranch species diversity is a site-specific attribute of Wai-an.  Except for 1 survey, no species at this site were considered dominant in terms of the abundance of individuals.  Similarities in species composition for pair-wise monthly samples were low.  No obvious trends in temporal changes in the number of species or species composition were noted. 

Key words: Nudibranch, Biodiversity, Penghu.

*Correspondence: Tel: 886-7-5252000.  Fax: 886-7-5255100.   E-mail:hinkiu@faculty.naysu.edu.tw