Spatio-temporal trends in diversity of demersal fish species in the Benguela current large marine ecosystem region

2015 ◽  
Vol 24 ◽  
pp. 102-121 ◽  
Author(s):  
Dawit Yemane ◽  
Samuel K. Mafwila ◽  
John Kathena ◽  
Silvi E. Nsiangango ◽  
Steve P. Kirkman
Keyword(s):  
Fish Species ◽  
Marine Ecosystem ◽  
Temporal Trends ◽  
Demersal Fish ◽  
Benguela Current ◽  
Large Marine Ecosystem ◽  
Spatio Temporal

Assessing changes in the distribution and range size of demersal fish populations in the Benguela Current Large Marine Ecosystem

2014 ◽  
Vol 24 (2) ◽  
pp. 463-483 ◽  
Author(s):  
Dawit Yemane ◽  
Stephen P. Kirkman ◽  
John Kathena ◽  
Silvi E. N’siangango ◽  
Bjørn Erik Axelsen ◽  
...  
Keyword(s):  
Marine Ecosystem ◽  
Demersal Fish ◽  
Range Size ◽  
Fish Populations ◽  
Benguela Current ◽  
Large Marine Ecosystem

scholarly journals Identifying and characterizing demersal fish biodiversity hotspots in the Benguela Current Large Marine Ecosystem: relevance in the light of global changes

2013 ◽  
Vol 70 (5) ◽  
pp. 943-954 ◽  
Author(s):  
Stephen P. Kirkman ◽  
Dawit Yemane ◽  
John Kathena ◽  
Samuel K. Mafwila ◽  
Silvi E. Nsiangango ◽  
...  
Keyword(s):  
Species Richness ◽  
Marine Ecosystem ◽  
Demersal Fish ◽  
Additive Models ◽  
Global Changes ◽  
Biodiversity Hotspots ◽  
Fish Biodiversity ◽  
Benguela Current ◽  
Large Marine Ecosystem ◽  
Richness Patterns

AbstractKirkman, S. P., Yemane, D., Kathena, J., Mafwila, S. K., Nsiangango, S. E., Samaai, T., Axelsen, B., and Singh, L. 2013. Identifying and characterizing demersal fish biodiversity hotspots in the Benguela Current Large Marine Ecosystem: relevance in the light of global changes. – ICES Journal of Marine Science, 70: 943–954. This study made use of distribution and abundance data of demersal fish and cephalopod species targeted during trawl surveys off Angola, Namibia and the west coast of South Africa, to determine species richness patterns including the location of diversity hotspots in the Benguela Current Large Marine Ecosystem. The reliability of alternative techniques for determining species richness patterns over the study domain, including geostatistical and non-geostatistical interpolation methods and regression type modelling, was tested using a cross-validation method. Generalized additive models were found to be the most effective method and were used to generate horizontal maps of species richness for different periods in each country. Despite changes in community structure that have been documented during the study period and which may be associated with climatic changes, this study showed the presence of consistently predictable hotspot areas over a 20–30-year study period (depending on country). The relationship between species richness and physical/environmental variables was inconsistent between countries, but generally hotspots of species richness were associated with greater depths and cooler bottom temperatures. Range shifts of species associated, for example, with warming of temperatures could conceivably affect the spatio-temporal persistence of hotspots in the long term.

Plankton productivity of the Benguela Current Large Marine Ecosystem (BCLME)

2016 ◽  
Vol 17 ◽  
pp. 75-92 ◽  
Author(s):  
Hans M. Verheye ◽  
Tarron Lamont ◽  
Jenny A. Huggett ◽  
Anja Kreiner ◽  
Ian Hampton
Keyword(s):  
Marine Ecosystem ◽  
Benguela Current ◽  
Large Marine Ecosystem

Hake species ( Merluccius capensis and M. paradoxus ) assessment in the Benguela Current Large Marine Ecosystem

2016 ◽  
Vol 17 ◽  
pp. 193-201 ◽  
Author(s):  
Johannes N. Kathena ◽  
Anders Nielsen ◽  
Uffe Høgsbro Thygesen ◽  
Casper W. Berg
Keyword(s):  
Marine Ecosystem ◽  
Benguela Current ◽  
Large Marine Ecosystem

scholarly journals Polycentric Regional Ocean Governance Opportunity in the Benguela Current Convention

2021 ◽  
Vol 8 ◽  
Author(s):  
Ashley Naidoo ◽  
Hashali Hamukuaya ◽  
Mafaniso Hara ◽  
Yamkela Mngxe ◽  
Jesper Raakjær
Keyword(s):  
Marine Ecosystem ◽  
Governance Mechanism ◽  
Governance Mechanisms ◽  
Polycentric Governance ◽  
Fisheries Science ◽  
Marine Management ◽  
Ocean Governance ◽  
Governance Systems ◽  
Benguela Current ◽  
Large Marine Ecosystem

The Benguela Current Convention (BCC) has been operational for a decade and has emerged from the precursor natural and fisheries science large marine ecosystem programs. This regional ocean governance institution emerged indigenously as an intergovernmental working arrangement across the Republics of Angola, Namibia, and South Africa. The Convention has been described as a Centralized Authority mode of regional ocean governance. This paper explores this description with reference to the ecosystem-based approach to marine management. The study is focused on the level of working arrangements within the Convention and its Commission across the national and regional scales. It finds that the BCC does meet the theoretical criteria of a polycentric governance mechanism at the resolution of its operations. Polycentric ocean governance mechanisms are valued in regional ocean governance as they potentially offer greater impact through higher levels of coordination, codesign, and integration. Polycentric governance systems incorporate multiple centers of authority that operate at different scales. Existing instances and further opportunities for polycentric governance mechanisms within the working arrangements of the Convention are identified for the Southeast Atlantic.

Transition to ecosystem-based governance of the Benguela Current Large Marine Ecosystem

2016 ◽  
Vol 17 ◽  
pp. 310-321 ◽  
Author(s):  
Hashali Hamukuaya ◽  
Claire Attwood ◽  
Nico Willemse
Keyword(s):  
Marine Ecosystem ◽  
Benguela Current ◽  
Large Marine Ecosystem
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