Distribution of Thaliacea in SW Taiwan coastal water in 1997, with special reference to Doliolum denticulatum, Thalia democratica and T. orientalis

Abstract

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 292:181-193 (2005) - doi:10.3354/meps292181 Distribution of Thaliacea in SW Taiwan coastal water in 1997, with special reference to Doliolum denticulatum, Thalia democratica and T. orientalis Kwee Siong Tew1,2, Wen-Tseng Lo1,* 1National Sun Yat-sen University, Institute of Marine Resources, Kaohsiung, 804, Taiwan, ROC2Present address: National Museum of Marine Biology and Aquarium, Pintung, 944, Taiwan, ROC *Corresponding author. Email: lowen@mail.nsysu.edu.tw ABSTRACT: Diel vertical migration of Thaliacea was monitored during different seasonal cruises in 1997 in the southwestern waters of Taiwan using samples collected by multiple plankton sampling nets and a 1 m plankton net. Overall, Doliolum denticulatum, Thalia democratica and T. orientalis were the 3 most dominant species in all seasons, and contributed ≥ 93% of the numerical total of Thaliacea. These species exhibited about a 2 times higher abundance at night than during the day, if all the data were integrated. In the seasonal multiple net samples, D. denticulatum and T. democratica exhibited an alternation between sexual and asexual reproduction between different sampling seasons, while aggregate zooids of T. orientalis, when compared with solitary zooids, dominated in all seasons and apparently increased from July to December. Different stages of these dominant species had different preferences for water depth in different seasons, suggesting that the vertical distribution of these species might be related to reproduction or food. The abundances of different stages of these thaliaceans were correlated with temperature and salinity. The time-series samples of surface water showed that species richness and abundance of these species varied seasonally, but was always greater at night than during the day. KEY WORDS: Diel vertical migration · DVM · Thaliacea · Season · Taiwan · Western Pacific Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 292. Online publication date: May 12, 2005 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2005 Inter-Research.