Robert J. M. Crawford

6.2k total citations · 1 hit paper
111 papers, 4.3k citations indexed

About

Robert J. M. Crawford is a scholar working on Ecology, Global and Planetary Change and Oceanography. According to data from OpenAlex, Robert J. M. Crawford has authored 111 papers receiving a total of 4.3k indexed citations (citations by other indexed papers that have themselves been cited), including 86 papers in Ecology, 54 papers in Global and Planetary Change and 19 papers in Oceanography. Recurrent topics in Robert J. M. Crawford's work include Avian ecology and behavior (73 papers), Marine and fisheries research (52 papers) and Wildlife Ecology and Conservation (20 papers). Robert J. M. Crawford is often cited by papers focused on Avian ecology and behavior (73 papers), Marine and fisheries research (52 papers) and Wildlife Ecology and Conservation (20 papers). Robert J. M. Crawford collaborates with scholars based in South Africa, United Kingdom and France. Robert J. M. Crawford's co-authors include Bruce M. Dyer, Les G Underhill, Peter G. Ryan, Lynne Shannon, David Grémillet, Lorien Pichegru, P. A. Shelton, Leshia Upfold, Alan Riach and Azwianewi B. Makhado and has published in prestigious journals such as Science, PLoS ONE and Environmental Pollution.

In The Last Decade

Robert J. M. Crawford

109 papers receiving 3.9k citations

Hit Papers

1 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Global Seabird Response to Forage Fish Depletion—One-Third for the Birds

2011 531 citations Philippe Cury, Tycho Anker‐Nilssen et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Robert J. M. Crawford South Africa	34	3.3k	2.3k	815	759	478	111	4.3k
Morten Frederiksen Denmark	38	3.9k 1.2×	1.7k 0.7×	883 1.1×	1.0k 1.4×	734 1.5×	110	4.8k
Tycho Anker‐Nilssen Norway	29	2.6k 0.8×	1.6k 0.7×	760 0.9×	298 0.4×	436 0.9×	97	3.5k
R. W. G. Caldow United Kingdom	33	2.0k 0.6×	1.4k 0.6×	636 0.8×	318 0.4×	524 1.1×	50	2.9k
Antony W. Diamond Canada	37	3.5k 1.1×	1.3k 0.6×	1.3k 1.6×	301 0.4×	692 1.4×	149	4.4k
Dan Minchin Lithuania	36	2.7k 0.8×	2.8k 1.2×	913 1.1×	1.3k 1.7×	337 0.7×	138	4.9k
Philip A. R. Hockey South Africa	36	2.7k 0.8×	1.1k 0.5×	737 0.9×	787 1.0×	1.0k 2.2×	110	3.7k
Joe Roman United States	23	2.1k 0.7×	1.3k 0.6×	615 0.8×	605 0.8×	256 0.5×	50	3.4k
Eric J. Woehler Australia	28	2.6k 0.8×	939 0.4×	445 0.5×	488 0.6×	350 0.7×	110	3.2k
Pablo Yorio Argentina	32	2.9k 0.9×	1.1k 0.5×	732 0.9×	580 0.8×	476 1.0×	156	3.4k
Jeff Laake United States	21	4.0k 1.2×	1.1k 0.5×	1.2k 1.5×	415 0.5×	536 1.1×	32	4.6k

Countries citing papers authored by Robert J. M. Crawford

Since Specialization

Citations

This map shows the geographic impact of Robert J. M. Crawford's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Robert J. M. Crawford with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert J. M. Crawford more than expected).

Fields of papers citing papers by Robert J. M. Crawford

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Robert J. M. Crawford. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Robert J. M. Crawford. The network helps show where Robert J. M. Crawford may publish in the future.

Co-authorship network of co-authors of Robert J. M. Crawford

This figure shows the co-authorship network connecting the top 25 collaborators of Robert J. M. Crawford. A scholar is included among the top collaborators of Robert J. M. Crawford based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Robert J. M. Crawford. Robert J. M. Crawford is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Sherley, Richard B., Azwianewi B. Makhado, Robert J. M. Crawford, et al.. (2024). The African Penguin Spheniscus demersus should be considered Critically Endangered. Ostrich. 95(3). 181–187. 6 indexed citations

Saraux, Claire, William J. Sydeman, John F. Piatt, et al.. (2020). Seabird‐induced natural mortality of forage fish varies with fish abundance: Evidence from five ecosystems. Fish and Fisheries. 22(2). 262–279. 15 indexed citations

Sherley, Richard B., Robert J. M. Crawford, Bruce M. Dyer, et al.. (2019). The status and conservation of the Cape Gannet Morus capensis. Ostrich. 90(4). 335–346. 18 indexed citations

Crawford, Robert J. M., Azwianewi B. Makhado, & W. H. Oosthuizen. (2017). Bottom-up and top-down control of the Benguela ecosystem's seabirds. Journal of Marine Systems. 188. 133–141. 15 indexed citations

Crossin, Glenn T., Phil Trathan, & Robert J. M. Crawford. (2013). Macaroni penguin (Eudyptes chrysolophus) and royal penguin (Eudyptes schlegeli). NERC Open Research Archive (Natural Environment Research Council). 3 indexed citations

Pichegru, Lorien, David Grémillet, Robert J. M. Crawford, & Peter G. Ryan. (2010). Marine no-take zone rapidly benefits endangered penguin. Biology Letters. 6(4). 498–501. 120 indexed citations

Cooper, J., M.N. Bester, Steven L. Chown, et al.. (2010). Biological survey of the Prince Edward Islands, December 2008. South African Journal of Science. 105(7/8). 5 indexed citations

Underhill, Les G, Richard B. Sherley, Bruce M. Dyer, & Robert J. M. Crawford. (2009). Interactions between snakes and seabirds on Robben, Schaapen and Meeuw Islands, Western Cape province, South Africa. Ostrich. 80(2). 115–118. 15 indexed citations

Mullers, Ralf H.E., R. A. Navarro, Robert J. M. Crawford, & Les G Underhill. (2009). The importance of lipid-rich fish prey for Cape gannet chick growth: are fishery discards an alternative?. ICES Journal of Marine Science. 66(10). 2244–2252. 33 indexed citations

10.

Crawford, Robert J. M., Les G Underhill, Leshia Upfold, & Bruce M. Dyer. (2007). An altered carrying capacity of the Benguela upwelling ecosystem for African penguins (Spheniscus demersus). ICES Journal of Marine Science. 64(3). 570–576. 55 indexed citations

11.

Lewis, Sue, David Grémillet, Francis Daunt, et al.. (2005). Using behavioural and state variables to identify proximate causes of population change in a seabird. Oecologia. 147(4). 606–614. 69 indexed citations

12.

Crawford, Robert J. M., Les G Underhill, Marthán N Bester, et al.. (2003). The Prince Edward Islands Millennium Expedition. South African Journal of Science. 99910. 407–409. 2 indexed citations

13.

Best, Peter B., et al.. (1997). TOP PREDATORS IN SOUTHERN AFRICA'S MARINE ECOSYSTEMS. Transactions of the Royal Society of South Africa. 52(1). 177–225. 19 indexed citations

14.

Crawford, Robert J. M.. (1991). Factors influencing population trends of some abundant vertebrates in sardine-rich coastal ecosystems. South African Journal of Marine Science. 10(1). 365–381. 19 indexed citations

15.

Crawford, Robert J. M., Peter G. Ryan, & Alan Williams. (1991). Seabird consumption and production in the Benguela and Western Agulhas ecosystems. South African Journal of Marine Science. 11(1). 357–375. 53 indexed citations

16.

Williams, Ashley J., W. Steele, J. Cooper, & Robert J. M. Crawford. (1990). DISTRIBUTION, POPULATION SIZE AND CONSERVATION OF HARTLAUB'S GULL LARUS HARTLAUBIL. Ostrich. 61(1-2). 66–76. 12 indexed citations

17.

Crawford, Robert J. M., et al.. (1984). Comparative Studies of Casein Breakdown in Cheddar Cheese Manufactured from Lactose-Hydrolysed Milk. Journal of Food Protection. 47(5). 381–387. 2 indexed citations

18.

Crawford, Robert J. M.. (1983). Some observations on Seabirds breeding in the Tsitsikamma Coastal National Park.. Koedoe. 26(1). 6 indexed citations

19.

Crawford, Robert J. M., James S. Crampton, & P. A. Shelton. (1982). DISTRIBUTION, POPULATION SIZE, BREEDING AND CONSERVATION OF THE KELP GULL IN SOUTHERN AFRICA. Ostrich. 53(3). 164–177. 46 indexed citations

20.

Crawford, Robert J. M.. (1969). SUBJECT: THE PRACTICAL APPLICATIONS OF PLASTICS IN THE DAIRY INDUSTRYL: Morning Session. International Journal of Dairy Technology. 22(1). 3–15. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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