Page 133 - Atlas Sea Birds Ver1

Crawford RJM, Cooper J, Shelton PA. 1982a. Distribution, strategies following eastward displacement of their main
population size, breeding and conservation of the Kelp prey. African Journal of Marine Science 38: 373–383.
Gull in southern Africa. Ostrich 53: 164–177. Crawford RJM, Dyer BM, Geldenhuys L, Oosthuizen WH,
Crawford RJM, Shelton PA, Brooke RK, Cooper J. 1982b. Makhado AB. 2018. Seabird breeding populations decrease
Taxonomy, distribution, population size and conservation along the arid coastline of South Africa’s Northern Cape
of the Crowned Cormorant Phalacrocorax coronatus. Le province. Ostrich 89: 299–305.
Gerfaut 72: 3–30. Crawford RJM, Sydeman WJ, Thompson SA, Sherley RB,
Crawford RJM, Dyer BM, Cordes I, Williams AJ. 1999. Seasonal Makhado AB. 2019. Food habits of an endangered
pattern of breeding, population trend and conservation seabird indicate recent poor availability of abundant forage
status of Bank cormorants Phalacrocorax neglectus off resources. ICES Journal of Marine Science 76: 1344–1352.
southwestern Africa. Biological Conservation 87: 49–58. Crawford RJM, Sydeman WJ, Tom DB, Thayer JA, Sherley RB,
Crawford RJM, Dyer BM, Kemper J, Simmons RE, Upfold L. 2007a. Shannon LJ, McInnes AM, Makhado AB, Hagen C, Furness
Trends in numbers of Cape Cormorants (Phalacrocorax RW, Carpenter-Kling T, Saraux C. 2022. Food limitation of
capensis) over a 50-year period, 1956–57 to 2006–07. seabirds in the Benguela ecosystem and management of
Emu 107: 253–261. their prey base. Namibian Journal of Environment 6 A: 1–13.
Crawford RJM, Whittington PA, Dyer BM, Upfold L. 2007b. Trends Frost P, Johnson P. 1977. Seabirds on the Diamond Coast, South
in numbers of Leach’s Storm Petrel, Hartlaub’s Gull and West Africa, December 1976. Cormorant 2:3–4.
Swift and Roseate Terns breeding in South Africa. In: Kirkman Marnewick MD, Retief EF, Theron NT, Wright DR, Anderson
SP (ed.) Final Report of the BCLME (Benguela Current TA. 2015. Important Bird and Biodiversity Areas of South
Large Marine Ecosystem) Project on Top Predators as Africa. Birdlife South Africa; Johannesburg.
Biological Indicators of Ecosystem Change in the BCLME. Simmons RE, Boix-Hazen C, Barnes KN, Jarvis AM, Robertson A.
Avian Demography Unit, Cape Town, pp 211–213. 1998. Important bird areas of Namibia. In: Barnes K (ed.).
Crawford RJM, Cockroft AC, Dyer BM, Upfold L. 2008. Divergent The Important Bird Areas of Southern Africa, BirdLife South
trends in Bank Cormorants Phalacrocorax neglectus Africa, Johannesburg, 295–332.
breeding in South Africa’s Western Cape consistent with Whittington PA, Crawford RJM, Martin AP, Randall RM, Brown M,
a distributional shift of rock lobsters Jasus lalandii. African Makhado AB, Dyer BM, Upfold L, Harrison KHB, Huisamen
Journal of Marine Science 30: 161–166. J, Waller L, Witteveen M. 2016. Recent trends of the Kelp
Crawford RJM, Underhill LG, Altwegg R, Dyer BM, Upfold L. Gull (Larus dominicanus) in South Africa. Waterbirds 39
2009. Trends in numbers of Kelp Gulls Larus dominicanus (Special Publication 1): 99–113.
off western South Africa, 1978–2007. Ostrich 80: 139–143. Williams AJ, Steele AK, Cooper J, Crawford RJM. 1990.
Crawford RJM, Dyer BM, Geldenhuys D, Makhado AB, Randall Distribution, population size and conservation of Hartlaub’s
RM, Upfold L, Visagie J, Waller L. 2012. Trends in numbers Gull Larus hartlaubii. Ostrich 61: 66–76
of crowned cormorants in South Africa, with information on
diet. African Journal of Marine Science 34: 411–424.
Crawford RJM, Randall RM, Whittington PA, Waller LJ, Dyer BM,
Allan DG, Fox C, Martin AP, Upfold L, Visagie J, Bachoo
S, Bowker M, Downs CT, Fox R, Huisamen J, Makhado
AB, Oosthuizen WH, Ryan PG, Taylor RH, Turpie JK. 2013.
South Africa’s coastal-breeding white-breasted cormorants:
population trends, breeding season and movements, and
diet. African Journal of Marine Science 35: 473–490.
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 Evolution 3:
10, 1–10.
Crawford RJM, Randall RM, Cook TR, Ryan PG, Dyer BM, Fox R,
Geldenhuys D, Huisamen J, McGeorge C, Upfold L, Visagie
J, Waller LJ, Whittington PA, Wilke CG, Makhado AB. 2016.
Cape cormorants decrease, move east and adapt foraging The old sewerage dams at Alexander Bay (photo L Geldenhuys)

White-breasted Cormorants nesting on a rocky outcrop in
Geeldoring Pan, 2018 (photo RJM Crawford) A view of Matthew Islands in 2018 (photo RJM Crawford)

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