Inhibition of feeding and reproduction in benthic copepod Tigriopus japonicus exposed to oil dispersed sediments and its antioxidant responses

Title
Inhibition of feeding and reproduction in benthic copepod Tigriopus japonicus exposed to oil dispersed sediments and its antioxidant responses
Author(s)
원은지; 강예희; 이연정; 김창준; 이균우; 김경련
KIOST Author(s)
Gang, Yehui(강예희)Lee, Yeonjung(이연정)Kim, Chang Joon(김창준)Lee, Kyun Woo(이균우)Kim, Kyoungrean(김경련)
Publication Year
2017-07-01
Abstract
Accidental oil spill causes ecological risks in aquatic environment. Particularly, oil attached to sediments has received great concern because effective technologies and equipment to remove oil from fine grains have not been developed yet. The copepod Tigriopus japonicus is one of the great candidates as a bio-indicator species, as they have short life cycle and diverse end-points can cover molecular to individual levels. In particular, this species can be directly affectedby polluted sediment as it is benthic copepod. In this study, copepod T. japonicus was exposed to oil dispersed sediments (<75 m grain size) and its biological repercussions were measured to evaluate the potency of the marine copepod T. japonicus as an experimental species for oil contaminated sediments. Adult and nauplius of T. japonicus were exposed to oil polluted sediments. In exposure group, molecular responses (antioxidant genes) were detected caused by oil dispersed sediments. For nauplius, growth retardation was measured at their nauplius stages in test group for 10 days exposure. For adult T. japonicus, survival rate was not observed but their reproduction rate (number of ovigerous female andtheir hatching success) was significantly reduced. The inhibition of assimilation rate was also tested separately using 13C labeled phytoplankton as a diet. This study showed diverse end-points of T. japonicus can be markers for oil dispers The copepod Tigriopus japonicus is one of the great candidates as a bio-indicator species, as they have short life cycle and diverse end-points can cover molecular to individual levels. In particular, this species can be directly affectedby polluted sediment as it is benthic copepod. In this study, copepod T. japonicus was exposed to oil dispersed sediments (<75 m grain size) and its biological repercussions were measured to evaluate the potency of the marine copepod T. japonicus as an experimental species for oil contaminated sediments. Adult and nauplius of T. japonicus were exposed to oil polluted sediments. In exposure group, molecular responses (antioxidant genes) were detected caused by oil dispersed sediments. For nauplius, growth retardation was measured at their nauplius stages in test group for 10 days exposure. For adult T. japonicus, survival rate was not observed but their reproduction rate (number of ovigerous female andtheir hatching success) was significantly reduced. The inhibition of assimilation rate was also tested separately using 13C labeled phytoplankton as a diet. This study showed diverse end-points of T. japonicus can be markers for oil dispers
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23914
Bibliographic Citation
19th international symposium on Pollutant Responses in Marine Organisms, pp.209, 2017
Publisher
PRIMO
Type
Conference
Language
English
Publisher
PRIMO
Related Researcher
Research Interests

Marine biogeochemistry,Stable isotope ecology,해양생지화학,안정동위원소 생태학

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