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Effects of two oil dispersants on phototaxis and swimming behaviour of barnacle larvae
Wu, RSS; Lam, PKS; Zhou, BS
1997
Conference NameAsia-Pacific Conference on Science and Management of Coastal Environment
Source PublicationHYDROBIOLOGIA
Pages9-16
Conference DateJUN 25-28, 1996
Conference PlaceHONG KONG, HONG KONG
DepartmentCITY UNIV HONG KONG,DEPT BIOL & CHEM,KOWLOON,HONG KONG; CHINESE ACAD SCI,INST HYDROBIOL,WUHAN,PEOPLES R CHINA
AbstractThe effects of two oil dispersants (Vecom B-1425 GL and Norchem OSD-570) mixed with diesel oil on the survival and behaviour of the stage II nauplii of the barnacle Balanus amphitrite were investigated. The 24 and 48-hour LC50 values for Vecom B-1425 GL:diesel mixture were 514 and 48 mg l(-1) respectively, while respective values for Norchem OSD-570:diesel mixture were 505 and 71 mg l(-1). Under sublethal concentrations, increased levels of the dispersant:diesel mixtures caused a reduction in phototactic responses. Balanus amphitrite nauplii failed to exhibit phototactic responses when exposed to Vecom B-1425 GL:diesel mixtures of 400 mg l(-1) and higher for 24 hours. A longer exposure time of 48 hours further reduced the Lowest Observable Effect Concentrations (LOECs) to 60 mg l(-1). The LOECs for Norchem OSD-570:diesel mixtures under exposure periods of 24 and 48 hours were 400 and 80 mg l(-1) respectively. The curvilinear velocities (VCL) and straight-line velocities (VSL) of the stage II nauplii ranged from 0.7-1.1 and 0.2-0.4 mm s(-1) respectively. Increased concentrations of dispersant:diesel mixtures caused a significant change in the curvilinear and straight-line velocities. Both oil dispersants, dispersant:diesel mixtures of 20 to 40 mg l(-1) caused significant increases in VCL, but no significant change in VSL. Dispersant:diesel mixtures of 100 mg l(-1) and higher resulted in a reduction in VSL for both dispersants.
KeywordOil Dispersant Phototaxis Swimming Behaviour Barnacle Larvae
Funding OrganizationBrit Council, Cathay Pacific Airways, Environm & Conservat Fund, Epson Fdn, Hong Kong Elect Co Ltd, Intergovt Oceanog Commiss, Paris, Int Soc Mangrove Ecosyst, Tokyo, Natl Nat Sci Fdn China, UN, Environm Programme
Indexed BySCI
Language英语
WOS IDWOS:A1997YK76300003
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/11863
Collection会议论文
Recommended Citation
GB/T 7714
Wu, RSS,Lam, PKS,Zhou, BS. Effects of two oil dispersants on phototaxis and swimming behaviour of barnacle larvae[C],1997:9-16.
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