Page 592 - Atlas Sea Birds Ver1

References Rand RW. 1960. The distribution, abundance and feeding habits
of the Cape Penguin, Spheniscus demersus, off the south-
Berruti A. 1989. Resident seabirds. In: Payne AIL, Crawford RJM western coast of the Cape Province. Investigational Report
(eds). Oceans of Life off Southern Africa. Vlaeberg, Cape Division of Sea Fisheries South Africa 41: 1–28.
Town: 257–273. Rand RW. 1963a. The biology of guano-producing seabirds. 4.
Cooper J, Brooke RK, Shelton PA, Crawford RJM. 1982. Composition of colonies on the Cape islands. Investigational
Distribution, population size and conservation of the Cape Report Division of Sea Fisheries South Africa 43: 1–32.
Cormorant Phalacrocorax capensis. Fisheries Bulletin South Rand RW. 1963b. The biology of guano-producing seabirds. 5.
Africa 16: 121–143. Composition of colonies on the South West African islands.
Crawford RJM, Cochrane KL. 1990. Onset of breeding by Cape Investigational Report Division of Sea Fisheries South
Gannets Morus capensis influenced by availability of nesting Africa 46: 1–26.
material. Ostrich 61: 147–149. Randall RM, Randall BM, Erasmus T. 1986. Rain-related breeding
failures in Jackass Penguins. Le Gerfaut 76: 281–288.
Crawford RJM, Shelton PA. 1978. Pelagic fish and seabird Ross GJB, Randall RM. 1990. Phosphatic sand removal from
interrelationships off the coasts of South West and South Dassen Island: effect on penguin breeding and guano
Africa. Biological Conservation 14: 85–109.
harvests. South African Journal of Science 86: 172–174.
Crawford RJM, Dyer BM, Kemper J, Simmons RE, Upfold L. 2007. Shaughnessy PD. 1984. Historical population levels of seals
Trends in numbers of Cape Cormorants (Phalacrocorax and seabirds on islands off southern Africa, with special
capensis) over a 50-year period, 1956–57 to 2006–07. Emu reference to Seal Island, False Bay. Investigational Report
107: 253–261. Sea Fisheries Research Institute, South Africa 127: 1–61.
Frost PGH, Siegfried WR, Cooper J. 1976. Conservation of the Shelton PA, Crawford RJM, Cooper J, Brooke RK. 1984.
jackass penguin (Spheniscus demersus (L.). Biological Distribution, population size and conservation of the Jackass
Conservation 9: 79–99. Penguin Spheniscus demersus. South African Journal of
Makhado AB, Braby R, Dyer BM, Kemper J, McInnes AM, Tom D, Marine Science 2: 217–257.
Crawford RJM. 2021. Seabirds of the Benguela ecosystem: Sherley RB, Crawford RJM, Dyer BM, Kemper J, Makhado AB,
utilisation, long-term changes and challenges. In: Mikkola Masotla M, Pichegru L, Pistorius PA, Roux J-P, Ryan PG, Tom
H (ed.). Birds - Challenges and Opportunities for Business, D, Upfold L, Winker H. 2019. The status and conservation of
Conservation and Research. InTech Open, London, UK, pp Cape Gannets Morus capensis. Ostrich 90: 335–346.
51–70. van Sittert L, Crawford RJM. 2003. A historical reconstruction of
Rand RW. 1952. Guano enterprise in South West Africa. Ostrich guano production on the Namibian islands, 1844–1895.
23: 169–185. South African Journal of Science 99: 13–16.

A photograph of Bird Rock platform, Walvis Bay, taken in 2014 by Namibia’s Ministry of Fisheries and Marine Resources. Some
cormorants are nesting around the edges and interior structures. A few pelicans are also present

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