RJM Crawford

Environmental Science · Physical Sciences

15h-index733citations25works0.02yr avg
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Research Topics

Avian ecology and behavior(20), Marine and fisheries research(12), Marine animal studies overview(5), Marine and coastal plant biology(4), Genetic diversity and population structure(2)

Publications25 total

The longest living gannet Morus spp. at Malgas Island, South Africa
Biodiversity Observations·2024Open Access
Geographical and temporal variation in the diet of Bank Cormorants <i>Phalacrocorax neglectus</i> in South Africa
Ostrich·2019· 2 cited
Cape cormorants decrease, move east and adapt foraging strategies following eastward displacement of their main prey
African Journal of Marine Science·2016· 20 cited
Recent population trends of sooty and light-mantled albatrosses breeding on Marion Island
African Journal of Marine Science·2016· 19 cited
Congruent, decreasing trends of gentoo penguins and Crozet shags at sub-Antarctic Marion Island suggest food limitation through common environmental forcing
African Journal of Marine Science·2014· 19 cited
Processes influencing the population dynamics and conservation of African penguins on Dyer Island, South Africa
African Journal of Marine Science·2014· 15 cited
South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet
African Journal of Marine Science·2013· 11 cited
Trends in numbers of crowned cormorants in South Africa, with information on diet
African Journal of Marine Science·2012· 10 cited
Collapse of South Africa's penguins in the early 21st century
African Journal of Marine Science·2011· 158 cited
Collapse of South Africa’s penguins in the early 21st century. Afr J Mar Sci
2011
Comparison of moult phenology of African penguins<i>Spheniscus demersus</i>at Robben and Dassen islands
African Journal of Marine Science·2009· 9 cited
Review of the rescue, rehabilitation and restoration of oiled seabirds in South Africa, especially African penguins<i>Spheniscus demersus</i>and Cape gannets<i>Morus capensis</i>, 1983–2005
African Journal of Marine Science·2009· 51 cited
Impact of flipper-banding on breeding success of African penguins<i>Spheniscus demersus</i>at Robben Island: comparisons among silicone rubber bands, stainless-steel bands and no bands
African Journal of Marine Science·2008· 9 cited
Divergent trends in bank cormorants<i>Phalacrocorax neglectus</i>breeding in South Africa's Western Cape consistent with a distributional shift of rock lobsters<i>Jasus lalandii</i>
African Journal of Marine Science·2008· 33 cited
Influences of the abundance and distribution of prey on African penguins<i>Spheniscus demersus</i>off western South Africa
African Journal of Marine Science·2008· 49 cited
Recent distributional changes of seabirds in South Africa: is climate having an impact?
African Journal of Marine Science·2008· 48 cited
Implications for seabirds off South Africa of a long-term change in the distribution of sardine
African Journal of Marine Science·2008· 75 citedOpen Access
Factors influencing the breeding success of Cape Gannets <i>Morus capensis</i> at Malgas Island in 2002/2003
Ostrich·2008· 12 cited
Impact of predation by Cape fur seals<i>Arctocephalus pusillus pusillus</i>on Cape gannets<i>Morus capensis</i>at Malgas Island, Western Cape, South Africa
African Journal of Marine Science·2006· 45 cited
Regionally coherent trends in colonies of African penguins<i>Spheniscus demersus</i>in the Western Cape, South Africa, 1987–2005
African Journal of Marine Science·2006· 52 cited
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Frequent Co-authors

BM Dyer(14), Leshia Upfold(11), AB Makhado(10), Les G Underhill(10), PA Whittington(9), AC Wolfaardt(7), J Visagie(6), RM Randall(5), Deon Geldenhuys(4), Peter G. Ryan(4), LJ Waller(4), B. J. Barham(2), Peter Barham(2), Tracey P. Fairweather(2), T. Mario Leshoro(2), Lynne Shannon(2), AP Martin(2), NTW Klages(2), BM Randall(2), PA Bartlett(2)