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Displaying results 1 - 18 of 18Click/tap on any title to see full details of the record
Sherley RB, Makhado AB, Crawford RJM, Hagen C, Kemper J, Ludynia K, Masotla MJ, McInnes A, Pichegru L, Tom D, Upfold L, Waller LJ 2024. The African Penguin Spheniscus demersus should be considered Critically Endangered. Ostrich 95 (3)
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The African Penguin Spheniscus demersus should be considered Critically Endangered.pdf 670.38 KB
Crawford RJM, Sydeman WJ, Tom DB, Thayer JA, Sherley RB, Shannon LJ, Mcinnes AM, Makhado AB, Hagen C, Furness RW, Carpenter-Kling T, Saraux C 2022. Food limitation of seabirds in the Benguela ecosystem and management of their prey base.   Namibian Journal of Environment 6 (A) 1-13
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Food limitation of seabirds in the Benguela ecosystem and management of their prey base.pdf 1.31 MB
Makhado AB, Braby R, Dyer BM, Kemper J, Mcinnes AM, Tom D, Crawford RJM 2021. Seabirds of the Benguela Ecosystem: Utilisation, long-term changes and challenges. Birds - Challenges and opportunities for business, conservation and research Mikkola H
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Seabirds of the Benguela Ecosystem.pdf 990.95 KB
Dyer BM, Cooper J, Crawford RJM, Sherley RB, Somhlaba S, Cockcroft A, Upfold L, Makhado AB 2020. Geographical and temporal variation in the diet of Bank Cormorants Phalacrocorax neglectus in South Africa. Ostrich 90 (4) 373-390
Website link:https://www.ajol.info/index.php/ostrich/article/view/192097
Sherley RB, Crawford RJM, de Blocq AD, Dyer BM, Geldenhuys D, Hagen C, Kemper J, Makhado AB, Pichegru L, Upfold L, Visagie J, Waller LJ, Winker H 2020. The conservation status and population decline of the African penguin deconstructed in space and time. Ecology and Evolution 10 (15) 8506-8516
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The conservation status and population decline of the African penguin deconstructed in space and time.pdf 965.34 KB
Sherley RB, Crawford RJM, Dyer BM, Kemper J, Makhado AB, Masotla M, Pichegru L, Pistorius PA, Roux J-P, Ryan PG, Tom D, Upfold L, Winker H 2019. The status and conservation of the Cape Gannet Morus capensis. Ostrich 90 (4) 335-346
Website link:https://www.ajol.info/index.php/ostrich/article/view/192070
Crawford RJM, Makhado AB, Whittington PA, Randall RM, Oosthuizen WH, Waller LJ 2015. A changing distribution of seabirds in South Africa—the possible impact of climate and its consequences. Frontiers in Ecology and the Environment Review Article
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A changing distribution of seabirds in South Africa_2015.pdf 2.47 MB
Crawford RJM, Whittington PA, Martin AP, Tree AJ, Makhado AB 2009. Population trends of seabirds breeding in South Africa's Eastern Cape and the possible influence of anthropogenic and environmental change. Marine Ornithology 37 159-174
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Population trends of seabirds breeding in South Africas Eastern Cape.pdf 1017.49 KB
Crawford RJM, David JHM, Shannon LJ, Kemper J, Klages NTW, Roux J-P, Underhill LG, Ward VL, Williams AJ, Wolfaardt AC 2001. African penguins as predators and prey - coping (or not) with change. South African Journal of Marine Science 23 (1) 435-447
Website link:http://www.ingentaconnect.com/content/nisc/sajms/2001/00000023/00000001/art00032
Cordes I, Crawford RJM, Williams AJ, Dyer BM 1999. Decrease of African Penguins at the Possession Island group, 1956-1995: contrasting trends for colonial and solitary breeders. Marine Ornithology 27 129-138
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Cordes_1999_Marine_Ornithology_27_129-138.pdf 105.01 KB
Crawford RJM, Dyer BM, Cordes I, Williams AJ 1999. Seasonal pattern of breeding, population trend and conservation status of bank cormorants Phalacrocorax neglectus off south western Africa. Biological Conservation 87 (1) 49-58
Website link:http://www.sciencedirect.com/science/article/pii/S0006320798000421
Crawford RJM, Williams AJ, Hofmeyr JH, Klages NTW, Randall RM, Cooper J, Dyer BM, Chesselet Y 1995. Trends of African Penguin Spheniscus demersus populations in the 20th-century. South African Journal of Marine Science 16 (1) 101-118
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Trends of African Penguin Spheniscus demersus populations in the 20th_century.pdf 1.28 MB
Crawford RJM, Ryan PG, Williams AJ 1991. Seabird consumption and production in the Benguela and Western Agulhas ecosystems. South African Journal of Marine Science 11 357-375
Website link:http://www.ingentaconnect.com/content/nisc/sajms/1991/00000011/00000001/art00020;jsessionid=j6n95e9s5ae3.alexandra
Crawford RJM, Williams AJ, Randall RM, Randall BM, Berruti A, Ross GJB 1990. Recent population trends of Jackass Penguins Spheniscus demersus off southern Africa. Biological Conservation 52 (3) 229 – 243
Website link:http://www.sciencedirect.com/science/article/pii/000632079090128C
Williams AJ, Steele WK, Cooper J, Crawford RJM 1990. Distribution, population-size and conservation of Hartlaub's Gull Larus hartlaubii. Ostrich: Journal of African Ornithology 61 (1-2) 66 – 76
Website link:http://www.tandfonline.com/doi/abs/10.1080/00306525.1990.9633941#.VHL6-1ItBHg
Cooper J, Crawford RJM, Suter W, Williams AJ 1990. Distribution, population-size and conservation of the Swift Tern Sterna bergii in southern Africa. Ostrich: Journal of African Ornithology 61 (1-2) 56 – 65
Website link:http://www.tandfonline.com/doi/abs/10.1080/00306525.1990.9633939#.VHsW62ctBHg
Crawford RJM, David JHM, Williams AJ, Dyer BM 1989. Competition for space: recolonizing seals displace endangered endemic seabirds off Namibia. Biological Conservation 48 (1) 59-72
Website link:http://www.sciencedirect.com/science/article/pii/0006320789900591
Crawford RJM, Williams AJ, Crawford PB 1986. A note on mortality of seabirds off western southern Africa, October 1985–February 1986. South African Journal of Marine Science 4 (1) 119-123
Website link:http://www.tandfonline.com/doi/abs/10.2989/025776186784461828#.VGXBClItBHg
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