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Displaying results 51 - 79 of 79Click/tap on any title to see full details of the record
Crawford RJM, Underhill LG, Upfold L, Dyer BM 2007. An altered carrying capacity of the Benguela upwelling ecosystem for African penguins (Spheniscus demersus). ICES Journal of Marine Science 64 570-576
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An altered carrying capacity of the Benguela upwelling ecosystem for African penguins.pdf 229.47 KB
Shannon LJ, Crawford RJM 1999. Management of the African Penguin Spheniscus demersus – insights from modelling. Marine Ornithology 27 119-128
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Shannon_1999_Marine_Ornith_penguins.pdf 455.11 KB
Kemper J, Underhill LG, Crawford RJM, Kirkman SP 2007. Chapter 42: Revision of the conservation status of seabirds and seals breeding in the Benguela Ecosystem. Final Report of the BCLME (Benguela Current Large Marine Ecosystem) Project on Top Predators as Biological Indicators of Ecosystem Change in the BCLME. Avian Demography Unit, Cape Town 325-342
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Revision of the conservation status of seabirds and seals breeding in the Benguela Ecosystem_2007.pdf 616.42 KB
Kemper J, Crawford RJM 2007. Chapter 5: Report on the availability and quality of seabird information. Final Report of the BCLME (Benguela Current Large Marine Ecosystem) Project on Top Predators as Biological Indicators of Ecosystem Change in the BCLME. Avian Demography Unit, Cape Town Kirkman SP 31-36
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Report on the availability and quality of seabird information_2007.pdf 35.09 KB
Crawford RJM, Hemming M, Kemper J, Klages NTW, Randall RM, Underhill LG, Venter AD, Ward VL, Wolfaardt AC 2006. S24-2 Molt of the African penguin, Spheniscus demersus, in relation to its breeding season and food availability. Acta Zoologica Sinica 53 (Supplement) 444-447
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Crawford_2006_Acta_Zool_Sinica_Molt_Afrcn_Penguin.pdf 619.36 KB
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, Shannon LJ, Nelson G 1995. Environmental-change, regimes and middle-sized pelagic fish in the South-East Atlantic-Ocean. Scientia Marina 59 417-426
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Environmental change_regimes and middle sized pelagic fish in the South East Atlantic Ocean_1995.pdf 10.34 MB
Crawford RJM, Cooper J, Dyer BM 1995. Conservation of an increasing population of Great White Pelicans Pelecanus onocrotalus in South Africa's Western Cape. South African Journal of Marine Science 15 33-42
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Conservation of an increasing population of Great White Pelicans Pelecanus onocrotalus in South Africas Western Cape.pdf 859.32 KB
Crawford RJM, Dyer BM, Brown PC 1995. Absence of breeding by African Penguins at 4 former colonies. South African Journal of Marine Science 15 269-272
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Absence of breeding by African penguins at four former colonies_1995.pdf 481.29 KB
Villacastin-Herrero CA, Crawford RJM, Field JG 1992. Statistical correlations between purse-seine catches of chub mackerel off South Africa and selected environmental parameters. South African Journal of Marine Science 12 (1) 157-165
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Statistical correlations between purse seine catches of chub mackerel off South Africa and selected environmental parameters.pdf 677.24 KB
Rae CMD, Boyd AJ, Crawford RJM 1992. Predation of anchovy by an Agulhas ring - a possible contributory cause of the very poor year-class of 1989. South African Journal of Marine Science 12 167-173
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Predation of anchovy by an Agulhas ring.pdf 739.3 KB
Shannon LV, Crawford RJM, Pollock DE, Hutchings L, Boyd AJ, Taunton-Clark J, Badenhorst A, Melville-Smith R, Augustyn CJ, Kochrane KL, Hampton I, Nelson G, Japp DW, Tarr RJQ 1992. The 1980s - a decade of change in the Benguela ecosystem. South African Journal of Marine Science 12 271 – 296
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The 1980s_a decade of change in the Benguela ecosystem.pdf 2.79 MB
Crawford RJM, Underhill LG, Raubenheimer CM, Dyer BM, Martin J 1992. Top predators in the Benguela ecosystem - implications of their trophic position. South African Journal of Marine Science 12 (1) 675-687
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Top predators in the Benguela ecosystem.pdf 1.29 MB
Crawford RJM 1991. Factors influencing population trends of some abundant vertebrates in sardine-rich coastal ecosystems. South African Journal of Marine Science 10 365-381
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Factors influencing population trends of some abundant vertebrates in sardine_rich coastal ecosystems.pdf 2.68 MB
Crawford RJM, Underhill LG, Venter JD 1990. Handline catches and stock identity of Snoek Thyrsites atun off South Africa and Namibia. South African Journal of Marine Science 9 95-99
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Handline catches and stock identity of Snoek Thyrsites atun off South Africa and Namibia.pdf 1.11 MB
Crawford RJM, Dyer BM, Kemper J, Simmons RE, Upfold L 2007. Trends in numbers of Cape Cormorants (Phalacrocorax capensis) over a 50-year period, 1956-57 to 2006-08. Emu 107 1 - 9
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Trends in numbers of Cape Cormorants.pdf 253.71 KB
Crawford RJM, de Villiers G 1985. Snoek and their prey - interrelationships in the Benguela upwelling system. South African Journal of Science 81 91 – 97
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Snoek and their prey.pdf 960.8 KB
Crawford RJM, Cruickshank RA, Shelton PA, Kruger I 1985. Partitioning of a goby resource amongst four avian predators and evidence for altered trophic flow in the pelagic community of an intense perennial upwelling system. South African Journal of Science 3 (1) 215–228
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Partitioning of a goby resource amongst 4 avian predators.pdf 1.13 MB
Crawford RJM 1987. Food and population variability in 5 regions supporting large stocks of anchovy, sardine and horse mackerel. South African Journal of Marine Science 5 735-757
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Food and population variability in 5 regions supporting large stocks of anchovy.pdf 2.16 MB
Lluchbelda D, Crawford RJM, Tawasaki T, MacCall AD, Parrish RH, Schwartzlose RA, Smith PE 1989. Worldwide fluctuations of sardine and anchovy stocks - the regime problem. South African Journal of Marine Science 8 195 – 205
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Worldwide fluctuations of sardine and anchovy stocks.pdf 815.57 KB
Hutchings L, Van der Lingen CD, Shannon LJ, Crawford RJM, Verheye HMS, Bartholomae CH, van der Plas AK, Louw D 2009. The Benguela Current: An ecosystem of four components. Progress in Oceanography 83 15 - 32
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Hutchings et al 2009 The Benguela in four parts.pdf 2.51 MB
Kemper J, Underhill LG, Crawford RJM, Kirkman SP 2007. Chapter 42: Revision of the conservation status of seabirds and seals breeding in the Benguela Ecosystem. Final report of the BCLME (Benguela Current Large Marine Ecosystem) project on top predators as Biological Indicators of Ecosystem Change in the BCLME Kirkman SP 325-342
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Conservation status of seabirds and seals breeding in Benguela Ecosystem.pdf 616.42 KB
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, 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, Dyer BM 1996. Age at breeding of crowned cormorants Phalacrocorax coronatus. South African Journal of Marine Science 17 (1) 315-318
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Age at breeding of crowned cormorants Phalacrocorax coronatus_1996.pdf 454.6 KB
Crawford RJM 2007. Chapter 20: Trends in numbers of three cormorants Phalacrocorax spp. breeding in South Africa's Western Cape Province. Final Report of the BCLME (Benguela Current Large Marine Ecosystem) Project on Top Predators as Biological Indicators of Ecosystem Change in the BCLME Kirkman SP 173-178
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Trends in numbers of three cormorants Phalacrocorax spp_2007.pdf 628.31 KB
Crawford RJM 1999. Seabird responses to long-term changes of prey resources off southern Africa. Proceedings 22 International Ornithological Congress 688-705
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Seabird responses to long_term changes of prey resources off southern Africa.pdf 358.74 KB
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, Shelton PA, Cooper J, Brooke RK 2010. Distribution, population size and conservation of the Cape gannet Morus capensis. South African Journal of Marine Science 1 (1) 153-174
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Distribution_population size and conservation of the Cape gannet Morus capensis_2010.pdf 1.97 MB
Displaying results 51 - 79 of 79

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