Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry
Antarctica’s Southern Ocean hosts a large range of important species that have been the subject of marine exploitation for about two hundred of years. Historically, whales and seals have been overexploited and this has led to increasing efforts to establish further fishing regulations and conservati...
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ftnorgehandelshs:oai:openaccess.nhh.no:11250/3014883 2023-05-15T13:36:53+02:00 Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry Kristjánsson, Kári Matan, Shukri Basberg, Bjørn L. 2022 application/pdf https://hdl.handle.net/11250/3014883 eng eng https://hdl.handle.net/11250/3014883 Energy Natural Resources and the Environment Master thesis 2022 ftnorgehandelshs 2022-09-07T22:43:56Z Antarctica’s Southern Ocean hosts a large range of important species that have been the subject of marine exploitation for about two hundred of years. Historically, whales and seals have been overexploited and this has led to increasing efforts to establish further fishing regulations and conservation measures by organizations such as the International Whaling Commission (IWC) and the Commission for Conservation of Antarctic Marine Living Resources (CCAMLR). This ecosystem hosts a complex food web that heavily relies on the world’s most abundant species in biomass, Antarctic krill (Euphasia superbia). This species is of concern because of its central role in the food web as a primary prey species for the majority of predator species that are of conservation importance. The Antarctic krill population faces future challenges such as potential increases in fishing and receding sea ice due to climate change. Changes to CCAMLR’s current krill management regime are necessary to ensure the sustainable management of krill in the future. This thesis aims to evaluate to what extent current CCAMLR enacted krill catch limits function in various catch scenarios where fishing demand is variable and krill recruitment may be decreasing due to climatic factors. Further, what changes to the fishing regime can be made to strategize for an economically viable fishing management regime that safe-guards significant predator species in a future with variable catches and a warmer climate where sea-ice continues to recede? We utilize the Mori and Butterworth model to simulate krill dynamics within study area A which is composed of CCAMLR’s statistical area 48 and 58. We use a reliance weighted index to further understand the effect of various scenarios on predator populations. Our study finds that fixed catch limits below 4.7 million tonnes in a fixed catch limit scenario, or variable catch limits that are between 10% and 15% of total stock size, achieves an equilibrium state for krill and all predator species involved when the ... Master Thesis Antarc* Antarctic Antarctic Krill antartic* Sea ice Southern Ocean NHH Brage Open institutional repository (Norwegian School of Economics) Antarctic Butterworth ENVELOPE(66.733,66.733,-70.700,-70.700) Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
NHH Brage Open institutional repository (Norwegian School of Economics) |
op_collection_id |
ftnorgehandelshs |
language |
English |
topic |
Energy Natural Resources and the Environment |
spellingShingle |
Energy Natural Resources and the Environment Kristjánsson, Kári Matan, Shukri Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry |
topic_facet |
Energy Natural Resources and the Environment |
description |
Antarctica’s Southern Ocean hosts a large range of important species that have been the subject of marine exploitation for about two hundred of years. Historically, whales and seals have been overexploited and this has led to increasing efforts to establish further fishing regulations and conservation measures by organizations such as the International Whaling Commission (IWC) and the Commission for Conservation of Antarctic Marine Living Resources (CCAMLR). This ecosystem hosts a complex food web that heavily relies on the world’s most abundant species in biomass, Antarctic krill (Euphasia superbia). This species is of concern because of its central role in the food web as a primary prey species for the majority of predator species that are of conservation importance. The Antarctic krill population faces future challenges such as potential increases in fishing and receding sea ice due to climate change. Changes to CCAMLR’s current krill management regime are necessary to ensure the sustainable management of krill in the future. This thesis aims to evaluate to what extent current CCAMLR enacted krill catch limits function in various catch scenarios where fishing demand is variable and krill recruitment may be decreasing due to climatic factors. Further, what changes to the fishing regime can be made to strategize for an economically viable fishing management regime that safe-guards significant predator species in a future with variable catches and a warmer climate where sea-ice continues to recede? We utilize the Mori and Butterworth model to simulate krill dynamics within study area A which is composed of CCAMLR’s statistical area 48 and 58. We use a reliance weighted index to further understand the effect of various scenarios on predator populations. Our study finds that fixed catch limits below 4.7 million tonnes in a fixed catch limit scenario, or variable catch limits that are between 10% and 15% of total stock size, achieves an equilibrium state for krill and all predator species involved when the ... |
author2 |
Basberg, Bjørn L. |
format |
Master Thesis |
author |
Kristjánsson, Kári Matan, Shukri |
author_facet |
Kristjánsson, Kári Matan, Shukri |
author_sort |
Kristjánsson, Kári |
title |
Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry |
title_short |
Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry |
title_full |
Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry |
title_fullStr |
Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry |
title_full_unstemmed |
Managing the Antartic Krill Fisheries: An Empirical Analysis of Regulatory Regimes and its Effects on Krill and Predator Species for a Sustainable Industry |
title_sort |
managing the antartic krill fisheries: an empirical analysis of regulatory regimes and its effects on krill and predator species for a sustainable industry |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3014883 |
long_lat |
ENVELOPE(66.733,66.733,-70.700,-70.700) |
geographic |
Antarctic Butterworth Southern Ocean The Antarctic |
geographic_facet |
Antarctic Butterworth Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill antartic* Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill antartic* Sea ice Southern Ocean |
op_relation |
https://hdl.handle.net/11250/3014883 |
_version_ |
1766085254904283136 |