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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
Whittington PA, Randall RM, Randall BM, Wolfaardt AC, Crawford RJM, Klages NTW, Bartlett PA, Chesselet YJ, Jones R 2005. Patterns of movements of the African penguin in South Africa and Namibia. African Journal of Marine Science 27 (1) 215-229
Whittington PA, Randall RM, Crawford RJM, Wolfaardt AC, Klages NTW, Randall BM, Bartlett PA, Chesselet YJ, Jones R 2005. Patterns of immigration to and emigration from breeding colonies by African penguins. African Journal of Marine Science 27 (1) 205-213
Berruti A, Underhill LG, Shelton PA, Moloney C, Crawford RJM 1993. Seasonal and interannual variation in the diet of 2 colonies of the Cape Gannet (Morus capensis) between 1977-78 and 1989. Colonial Waterbirds 16 1977 – 1978
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
Downloadable files:
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Partitioning of a goby resource amongst 4 avian predators.pdf 1.13 MB
Crawford RJM, Shelton PA, Berruti A 1983. Cape Cormorants as potential indicators of pelagic fish stocks off southern Africa. South Africa Journal of Science 79 466-468
Crawford RJM, Shelton PA, Brooke RK, Cooper J 1982. Taxonomy, distribution, population size and conservation of the Crowned Cormorant Phalacrocorax coronatus. Gerfaut 72 3 - 30
Cooper J, Brooke RK, Shelton PA, Crawford RJM 1982. Distribution, population size and conservation of the Cape Cormorant Phalacrocorax capensis. Fisheries Bulletin of South Africa 16 121 - 143
Crawford RJM, Shelton PA 1981. Population trends for some southern African seabirds related to fish availability. Proceedings of the Symposium on Birds of the Sea and Shore Cooper, J. 15-41
Crawford RJM, Shelton PA, Batchelor AL, Clinning CF 1980. Observations on the mortality of juvenile Cape Cormorants Phalacrocorax capensis during 1975 and 1979. Fisheries Bulletin of South Africa (13) 69 - 75

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