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Crawford RJM, Siegfried WR, Shannon LV, Villacastin-Herrero CA, Underhill LG 1990. Environmental-influences on marine biota off southern Africa. South Africa Journal of Science 86 330-339
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
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
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
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
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
Downloadable files:
Attachment Size
Worldwide fluctuations of sardine and anchovy stocks.pdf 815.57 KB
Macdonald IAW, Crawford RJM, Siegfried WR, Huntley BJ 1988. Long-term environmental-change in and around southern Africa. South Africa Journal of Science 84 483-486
Shannon LV, Crawford RJM, Brundrit GB, Underhill LG 1988. Responses of fish populations in the Benguela ecosystem to environmental change. Journal Du Conseil 45 5 – 12
Crawford RJM, Shannon LV, Pollock DE 1987. The Benguela ecosystem. Part IV. The major fish and invertebrate resources. Oceanography and Marine Biology Annual Review 25 353-505
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
Crawford RJM, de Villiers G 1985. Snoek and their prey - interrelationships in the Benguela upwelling system. South African Journal of Science 81 91 – 97
Downloadable files:
Attachment Size
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
Downloadable files:
Attachment Size
Partitioning of a goby resource amongst 4 avian predators.pdf 1.13 MB
Shannon LV, Crawford RJM, Duffy DC 1984. Pelagic fisheries and warm events - a comparative study. South Africa Journal of Science 80 51-60
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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