Survey frequency affects the estimates and conclusions of long-term changes in waterbird populations: a case study from a South African wetland

2019 ◽  
Vol 28 (13) ◽  
pp. 3429-3443
Author(s):  
Dominic A. W. Henry ◽  
Timothy G. O’Connor
Keyword(s):  
South African ◽  
Long Term Changes

scholarly journals Trends in numbers of Cape gannets (Morus capensis), 1956/1957–2005/2006, with a consideration of the influence of food and other factors

2006 ◽  
Vol 64 (1) ◽  
pp. 169-177 ◽  
Author(s):  
Robert J. M. Crawford ◽  
Benedict L. Dundee ◽  
Bruce M. Dyer ◽  
Norbert T. W. Klages ◽  
Michael A. Meÿer ◽  
...  
Keyword(s):  
South Africa ◽  
South African ◽  
Conservation Status ◽  
Fish Prey ◽  
Management Measures ◽  
Fur Seals ◽  
Long Term Changes ◽  
Influence Of Food ◽  
Abundance And Distribution

Abstract Crawford, R. J. M., Dundee, B. L., Dyer, B. M., Klages, N. T., Meÿer, M. A., and Upfold, L. 2007. Trends in numbers of Cape gannets (Morus capensis), 1956/57–2005/06, with a consideration of the influence of food and other factors – ICES Journal of Marine Science, 64, 169–177. Cape gannets (Morus capensis) breed at six colonies in Namibia and South Africa. Population size averaged about 250 000 pairs over the period 1956/1957–1968/1969 and about 150 000 pairs from 1978/1979 to 2005/2006. Over the whole 50-y period, numbers at the three Namibian colonies fell by 85–98%, with greater proportional decreases in the south. There were increases at two South African colonies between 1956/1957 and 2005/2006. The colony at Lambert's Bay increased between 1956/1957 and 2003/2004, but attacks by Cape fur seals (Arctocephalus pusillus) on birds at nests caused abandonment of the entire colony in 2005/2006. Long-term changes at colonies are thought to be largely attributable to an altered abundance and distribution of prey, especially sardine (Sardinops sagax) and anchovy (Engraulis encrasicolus). In both Namibia and South Africa, the numbers of Cape gannets breeding were significantly related to the biomass of epipelagic fish prey. Over the 50-y period, there was also a marked similarity in the proportions of gannets and epipelagic fish in the Benguela system, which were present in Namibia and South Africa. In the 2000s, there was an eastward shift in the distribution of sardine off South Africa and a large increase in the number of gannets breeding at South Africa's easternmost colony. When sardine were scarce off South Africa, gannets fed on anchovy, but off Namibia anchovy only temporarily and partially replaced sardine. Ecosystem management measures that might improve the conservation status of Cape gannets are considered.

scholarly journals Where are they working? A case study of twenty Cuban-trained South African doctors

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Munirah Motala ◽  
Jacqueline Van Wyk
Keyword(s):  
Rural Communities ◽  
South African ◽  
Rural Areas ◽  
Career Choices ◽  
Medical Training ◽  
Sampling Strategy ◽  
Structured Interviews ◽  
Primary Care Level

Background: The year 2017 marked the 21st anniversary of the South African Cuban Medical Collaboration (SACMC) programme that offers disadvantaged South African (SA) students an opportunity for medical training in Cuba. Graduates are expected to return to practice at a primary care level in rural communities; however, little is known about the professional trajectories and career choices of graduates from the programme.Aim: This study explored the reasons why students enrolled in the programme, their professional and career choices as graduates and their career intentions.Setting: The study setting was the whole of SA although participants were primarily drawn from KwaZulu-Natal.Methods: An exploratory, qualitative case study used a purposive sampling strategy to gather data through semi-structured interviews from participants.Results: Graduates (N = 20) of the SACMC programme were all practicing in local SA settings. Participants preferred the SACMC programme as it offered them a full scholarship for medical training. Nineteen doctors had fulfilled their obligation to work in rural areas. Thirteen doctors are engaged in primary healthcare practice, either as private practice generalists or as public service medical officers. Three doctors had completed specialty training: one doctor was training towards specialisation, one doctor was employed at national government and two doctors were employed as medical managers. At the time of the study, 11 doctors were practicing in rural locations and 19 had indicated a long-term intention to work and live within South Africa.Conclusion: The participants of this study who graduated from the SACMC programme are fulfilling their obligations in rural communities. They all intend to contribute to the SA medical workforce in the long-term.

scholarly journals Analyzing the market position of fish species subject to the impact of long-term changes: a case study of French fisheries in the Bay of Biscay

2008 ◽  
Vol 21 (3) ◽  
pp. 307-316 ◽  
Author(s):  
Pascal Le Floc'h ◽  
Jean-Charles Poulard ◽  
Olivier Thébaud ◽  
Fabian Blanchard ◽  
Julien Bihel ◽  
...  
Keyword(s):  
Fish Species ◽  
Bay Of Biscay ◽  
Market Position ◽  
Long Term Changes ◽  
The Impact
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