Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments
Master's thesis in Environmental technology Expanding petroleum activities into northern marine areas have resulted in need for tools that specify Arctic specific characteristics when assessing environmental risks for these regions. In order to estimate the environmental impact of mechanically...
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University of Stavanger, Norway
2014
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ftunivstavanger:oai:uis.brage.unit.no:11250/182618 2023-06-11T04:09:21+02:00 Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments Kjelsnes, Anneli Jenssen 2014-02-06T10:06:20Z application/pdf http://hdl.handle.net/11250/182618 eng eng University of Stavanger, Norway Masteroppgave/UIS-TN-IMN/2013; ConocoPhilips, Camare project http://hdl.handle.net/11250/182618 meganyctiphanes norvegica Calanus finmarchicus zooplankton oil chemical dispersant teknisk miljøvern vann VDP::Technology: 500 Master thesis 2014 ftunivstavanger 2023-05-29T16:03:51Z Master's thesis in Environmental technology Expanding petroleum activities into northern marine areas have resulted in need for tools that specify Arctic specific characteristics when assessing environmental risks for these regions. In order to estimate the environmental impact of mechanically or chemically dispersed oil, on marine populations in sensitive northern environments, laboratory studies need to be developed. Such studies would be useful fir risk assessments and modelling potential effects of oil related pollution. The overall objective of the thesis was to establish an exposure study that would be useful for estimation of the effects of oil in ice or blowout scenarios on northern marine keystone organisms. Further, some basic parameters of growth and moulting of the Northern krill from the Stavanger area was established under different experimental conditions. A moult pre-study tested three different feeding regimes (Artemia nauplii + commercial shrimo larvae feed (EZ larvae), Thalassiosira algae paste + EZ Larvae and starved) studied over a period of two months. The length measurements recorded for moults and frozen animals only differentiated between the starved group and the fed treatments, and overall negative INC values at the end in all treatments were most likely caused by maintenance procedures. The study showed that the fed groups kept their moulting rhythm while the starved group did not. The CFS exposure experiment conducted on M. norvegica revealed no significant difference between the Control (no oil), Low (0.54 mg/l) or Medium (1.6 mg/l) treatments of mechanically dispersed crude oil exposures in the moults frequency or animal lengths or weights. However, all individuals in the High (4.9 mg/l) exposure group died before first sampling, and all in Medium died before the second sampling. Still, the Low treatment was persistently lower than the Control in all measured parameters and visual observation of the moults revealed potential bacterial infection on oil exposed individuals. The ... Master Thesis Arctic Calanus finmarchicus Meganyctiphanes norvegica Northern krill Zooplankton University of Stavanger: UiS Brage Arctic |
institution |
Open Polar |
collection |
University of Stavanger: UiS Brage |
op_collection_id |
ftunivstavanger |
language |
English |
topic |
meganyctiphanes norvegica Calanus finmarchicus zooplankton oil chemical dispersant teknisk miljøvern vann VDP::Technology: 500 |
spellingShingle |
meganyctiphanes norvegica Calanus finmarchicus zooplankton oil chemical dispersant teknisk miljøvern vann VDP::Technology: 500 Kjelsnes, Anneli Jenssen Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
topic_facet |
meganyctiphanes norvegica Calanus finmarchicus zooplankton oil chemical dispersant teknisk miljøvern vann VDP::Technology: 500 |
description |
Master's thesis in Environmental technology Expanding petroleum activities into northern marine areas have resulted in need for tools that specify Arctic specific characteristics when assessing environmental risks for these regions. In order to estimate the environmental impact of mechanically or chemically dispersed oil, on marine populations in sensitive northern environments, laboratory studies need to be developed. Such studies would be useful fir risk assessments and modelling potential effects of oil related pollution. The overall objective of the thesis was to establish an exposure study that would be useful for estimation of the effects of oil in ice or blowout scenarios on northern marine keystone organisms. Further, some basic parameters of growth and moulting of the Northern krill from the Stavanger area was established under different experimental conditions. A moult pre-study tested three different feeding regimes (Artemia nauplii + commercial shrimo larvae feed (EZ larvae), Thalassiosira algae paste + EZ Larvae and starved) studied over a period of two months. The length measurements recorded for moults and frozen animals only differentiated between the starved group and the fed treatments, and overall negative INC values at the end in all treatments were most likely caused by maintenance procedures. The study showed that the fed groups kept their moulting rhythm while the starved group did not. The CFS exposure experiment conducted on M. norvegica revealed no significant difference between the Control (no oil), Low (0.54 mg/l) or Medium (1.6 mg/l) treatments of mechanically dispersed crude oil exposures in the moults frequency or animal lengths or weights. However, all individuals in the High (4.9 mg/l) exposure group died before first sampling, and all in Medium died before the second sampling. Still, the Low treatment was persistently lower than the Control in all measured parameters and visual observation of the moults revealed potential bacterial infection on oil exposed individuals. The ... |
format |
Master Thesis |
author |
Kjelsnes, Anneli Jenssen |
author_facet |
Kjelsnes, Anneli Jenssen |
author_sort |
Kjelsnes, Anneli Jenssen |
title |
Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
title_short |
Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
title_full |
Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
title_fullStr |
Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
title_full_unstemmed |
Effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
title_sort |
effect studies of different oil and dispersant exposures on keystone pelagic zooplankton species in arctic environments |
publisher |
University of Stavanger, Norway |
publishDate |
2014 |
url |
http://hdl.handle.net/11250/182618 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Calanus finmarchicus Meganyctiphanes norvegica Northern krill Zooplankton |
genre_facet |
Arctic Calanus finmarchicus Meganyctiphanes norvegica Northern krill Zooplankton |
op_relation |
Masteroppgave/UIS-TN-IMN/2013; ConocoPhilips, Camare project http://hdl.handle.net/11250/182618 |
_version_ |
1768383164008366080 |