T. Royama

4.0k total citations · 3 hit papers
22 papers, 3.1k citations indexed

About

T. Royama is a scholar working on Ecology, Nature and Landscape Conservation and Global and Planetary Change. According to data from OpenAlex, T. Royama has authored 22 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Ecology, 7 papers in Nature and Landscape Conservation and 5 papers in Global and Planetary Change. Recurrent topics in T. Royama's work include Animal Ecology and Behavior Studies (6 papers), Ecology and Vegetation Dynamics Studies (6 papers) and Fire effects on ecosystems (5 papers). T. Royama is often cited by papers focused on Animal Ecology and Behavior Studies (6 papers), Ecology and Vegetation Dynamics Studies (6 papers) and Fire effects on ecosystems (5 papers). T. Royama collaborates with scholars based in Canada, Japan and United Kingdom. T. Royama's co-authors include Wayne E. MacKinnon, E. G. Kettela, James R. Gilbert, Christopher J. Lucarotti, Peter C. McCarthy, Eldon S. Eveleigh, Steven J. Pollock, Jocelyne Morin, A. R. Watkinson and R. F. Morris and has published in prestigious journals such as Ecology, Journal of Ecology and Ecological Monographs.

In The Last Decade

T. Royama

21 papers receiving 2.5k citations

Hit 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.

Analytical Population Dynamics

1992 1.1k citations T. Royama profile →
Factors Governing the Hunting Behaviour and Selection of Food by the Great Tit (Parus major L.)

1970 387 citations T. Royama profile →
A comparative study of models for predation and parasitism

1971 348 citations T. Royama Population Ecology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
T. Royama Canada	13	2.0k	1.1k	1.1k	741	579	22	3.1k
Monte Lloyd United States	23	1.3k 0.6×	1.4k 1.3×	917 0.9×	471 0.6×	659 1.1×	39	3.2k
H. G. Andrewartha Australia	13	1.9k 0.9×	1.3k 1.2×	1.0k 1.0×	471 0.6×	844 1.5×	23	3.6k
Melanie J. Hatcher United Kingdom	31	1.6k 0.8×	644 0.6×	477 0.4×	350 0.5×	572 1.0×	56	2.8k
Sipke E. van Wieren Netherlands	36	2.1k 1.0×	1.1k 1.0×	804 0.8×	531 0.7×	160 0.3×	78	3.7k
Michael F. Benard United States	20	1.4k 0.7×	1.4k 1.3×	902 0.8×	1.2k 1.6×	307 0.5×	37	3.2k
David A. Spiller United States	34	1.6k 0.8×	1.7k 1.5×	1.1k 1.0×	856 1.2×	322 0.6×	64	3.2k
Douglas E. Gill United States	22	961 0.5×	1.3k 1.2×	748 0.7×	1.2k 1.6×	152 0.3×	42	2.6k
George O. Batzli United States	40	3.3k 1.6×	1.3k 1.2×	1.7k 1.6×	262 0.4×	198 0.3×	100	4.1k
L. C. Birch Australia	20	2.1k 1.0×	1.6k 1.4×	1.3k 1.2×	529 0.7×	1.0k 1.7×	30	4.4k
Matı́as Arim Uruguay	26	1.8k 0.9×	965 0.9×	953 0.9×	800 1.1×	217 0.4×	80	3.0k

Countries citing papers authored by T. Royama

Since Specialization

Citations

This map shows the geographic impact of T. Royama'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 T. Royama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. Royama more than expected).

Fields of papers citing papers by T. Royama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by T. Royama. 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 T. Royama. The network helps show where T. Royama may publish in the future.

Co-authorship network of co-authors of T. Royama

This figure shows the co-authorship network connecting the top 25 collaborators of T. Royama. A scholar is included among the top collaborators of T. Royama 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 T. Royama. T. Royama 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

1.

Royama, T.. (2021). Animal Population Ecology. Cambridge University Press eBooks. 7 indexed citations

2.

Royama, T.. (2021). Animal Population Ecology: An Analytical Approach. 1 indexed citations

3.

Royama, T., Eldon S. Eveleigh, Jocelyne Morin, et al.. (2017). Mechanisms underlying spruce budworm outbreak processes as elucidated by a 14‐year study in New Brunswick, Canada. Ecological Monographs. 87(4). 600–631. 32 indexed citations

4.

Royama, T., et al.. (2005). ANALYSIS OF SPRUCE BUDWORM OUTBREAK CYCLES IN NEW BRUNSWICK, CANADA, SINCE 1952. Ecology. 86(5). 1212–1224. 113 indexed citations

5.

Frankenhuyzen, Kees van, et al.. (2002). Incidence and impact of Entomophaga aulicae (Zygomycetes: Entomophthorales) and a nucleopolyhedrovirus in an outbreak of the whitemarked tussock moth (Lepidoptera: Lymantriidae). The Canadian Entomologist. 134(6). 825–845. 11 indexed citations

6.

Royama, T.. (2001). Measurement, analysis, and interpretation of mortality factors in insect survivorship studies, with reference to the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae). Population Ecology. 43(2). 157–178. 15 indexed citations

7.

Royama, T.. (1996). A Fundamental Problem in Key Factor Analysis. Ecology. 77(1). 87–93. 56 indexed citations

8.

Gilbert, James R. & T. Royama. (1994). Analytical Population Dynamics. Journal of Wildlife Management. 58(2). 383–383. 13 indexed citations

9.

Watkinson, A. R. & T. Royama. (1994). Analytical Population Dynamics.. Journal of Ecology. 82(2). 431–431. 8 indexed citations

10.

Royama, T.. (1992). Analytical Population Dynamics. 1125 indexed citations breakdown →

11.

Royama, T.. (1984). Population Dynamics of the Spruce Budworm Choristoneura Fumiferana. Ecological Monographs. 54(4). 429–462. 384 indexed citations

12.

Royama, T.. (1981). Evaluation of Mortality Factors in Insect Life Table Analysis. Ecological Monographs. 51(4). 495–505. 70 indexed citations

13.

Royama, T.. (1977). The effect of moth dispersal on the dynamics of a local spruce budworm population.. 33(6). 43–44. 2 indexed citations

14.

Royama, T.. (1971). A comparative study of models for predation and parasitism. Population Ecology. 13(S1). 1–91. 348 indexed citations breakdown →

15.

Royama, T.. (1969). A Model for the Global Variation of Clutch Size in Birds. Oikos. 20(2). 562–562. 44 indexed citations

16.

Morris, R. F. & T. Royama. (1969). LOGARITHMIC REGRESSION AS AN INDEX OF RESPONSES TO POPULATION DENSITY: COMMENT ON A PAPER BY M. P. HASSELL AND C. B. HUFFAKER. The Canadian Entomologist. 101(4). 361–364. 5 indexed citations

17.

Royama, T.. (1966). A re-interpretation of courtship feeding. Bird Study. 13(2). 116–129. 120 indexed citations

18.

Royama, T.. (1966). FACTORS GOVERNING FEEDING RATE, FOOD REQUIREMENT AND BROOD SIZE OF NESTLING GREAT TITS PARUS MAJOR. Ibis. 108(3). 313–347. 304 indexed citations

19.

Royama, T., et al.. (1960). Bird research at Musashi Imperial Tomb area (Occasional report 2):The Great Tit at the roost. 2(15). 123–129.

20.

Royama, T.. (1960). The Theory and Practice of Line Transects in Animal Ecology by means of Visual and Auditory Recognition. Yamashina Chōrui Kenkyūjo Kenkyū hōkoku/Yamashina Chourui Kenkyuujo kenkyuu houkoku. 2(14). 1–17. 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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