Karl‐Arne Stokkan

3.4k total citations · 1 hit paper
43 papers, 2.6k citations indexed

About

Karl‐Arne Stokkan is a scholar working on Endocrine and Autonomic Systems, Ecology and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, Karl‐Arne Stokkan has authored 43 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Endocrine and Autonomic Systems, 16 papers in Ecology and 13 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in Karl‐Arne Stokkan's work include Circadian rhythm and melatonin (16 papers), Avian ecology and behavior (8 papers) and Spaceflight effects on biology (7 papers). Karl‐Arne Stokkan is often cited by papers focused on Circadian rhythm and melatonin (16 papers), Avian ecology and behavior (8 papers) and Spaceflight effects on biology (7 papers). Karl‐Arne Stokkan collaborates with scholars based in Norway, United Kingdom and United States. Karl‐Arne Stokkan's co-authors include Michael Menaker, Shin Yamazaki, Yoshiyuki Sakaki, Hajime Tei, N. J. C. Tyler, Lars P. Folkow, Bob van Oort, Eirik Reierth, P. J. Sharp and Menno P. Gerkema and has published in prestigious journals such as Nature, Science and SHILAP Revista de lepidopterología.

In The Last Decade

Karl‐Arne Stokkan

43 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.

Entrainment of the Circadian Clock in the Liver by Feeding

2001 1.4k citations Karl‐Arne Stokkan, Shin Yamazaki et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Karl‐Arne Stokkan Norway	22	1.7k	1.0k	461	404	399	43	2.6k
Verdun M. King United Kingdom	16	1.5k 0.9×	687 0.7×	442 1.0×	585 1.4×	335 0.8×	21	2.5k
Stephan Steinlechner Germany	30	1.8k 1.0×	1.4k 1.3×	744 1.6×	934 2.3×	489 1.2×	87	3.1k
David G. Hazlerigg United Kingdom	41	3.2k 1.8×	1.1k 1.1×	359 0.8×	406 1.0×	922 2.3×	112	4.6k
Michal Zeman Slovakia	32	1.7k 0.9×	733 0.7×	384 0.8×	430 1.1×	297 0.7×	196	3.4k
Hugues Dardente France	33	3.3k 1.9×	1.3k 1.3×	197 0.4×	301 0.7×	850 2.1×	78	4.5k
George A. Bubenik Canada	39	2.4k 1.4×	973 1.0×	661 1.4×	214 0.5×	631 1.6×	110	4.7k
Eric L. Bittman United States	33	3.0k 1.7×	1.1k 1.1×	131 0.3×	177 0.4×	841 2.1×	72	4.2k
Patricia J. DeCoursey United States	18	1.3k 0.7×	432 0.4×	398 0.9×	320 0.8×	678 1.7×	27	1.9k
Shizufumi Ebihara Japan	41	3.8k 2.2×	875 0.9×	318 0.7×	657 1.6×	1.7k 4.1×	102	5.3k
Milton H. Stetson United States	31	1.8k 1.0×	601 0.6×	478 1.0×	502 1.2×	515 1.3×	117	3.1k

Countries citing papers authored by Karl‐Arne Stokkan

Since Specialization

Citations

This map shows the geographic impact of Karl‐Arne Stokkan'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 Karl‐Arne Stokkan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karl‐Arne Stokkan more than expected).

Fields of papers citing papers by Karl‐Arne Stokkan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karl‐Arne Stokkan. 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 Karl‐Arne Stokkan. The network helps show where Karl‐Arne Stokkan may publish in the future.

Co-authorship network of co-authors of Karl‐Arne Stokkan

This figure shows the co-authorship network connecting the top 25 collaborators of Karl‐Arne Stokkan. A scholar is included among the top collaborators of Karl‐Arne Stokkan 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 Karl‐Arne Stokkan. Karl‐Arne Stokkan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Tyler, N. J. C., Pablo Gregorini, Mads C. Forchhammer, et al.. (2016). Behavioral Timing without Clockwork. Journal of Biological Rhythms. 31(5). 522–533. 8 indexed citations

Folkow, Lars P., et al.. (2012). The metabolic cost of incline locomotion in the Svalbard rock ptarmigan (Lagopus muta hyperborea): the effects of incline grade and seasonal fluctuations in body mass. Journal of Experimental Biology. 216(Pt 8). 1355–63. 12 indexed citations

Tickle, Peter G., et al.. (2011). The musculoskeletal anatomy of the reindeer (Rangifer tarandus): fore- and hindlimb. Polar Biology. 34(10). 1571–1578. 25 indexed citations

Nudds, Robert L., et al.. (2010). Reduced Metabolic Cost of Locomotion in Svalbard Rock Ptarmigan (Lagopus muta hyperborea) during Winter. PLoS ONE. 5(11). e15490–e15490. 19 indexed citations

Silverin, Bengt, John C. Wingfield, Karl‐Arne Stokkan, et al.. (2008). Ambient temperature effects on photo induced gonadal cycles and hormonal secretion patterns in Great Tits from three different breeding latitudes. Hormones and Behavior. 54(1). 60–68. 73 indexed citations

Stokkan, Karl‐Arne, Bob van Oort, N. J. C. Tyler, & Andrew Loudon. (2007). Adaptations for life in the Arctic: evidence that melatonin rhythms in reindeer are not driven by a circadian oscillator but remain acutely sensitive to environmental photoperiod. Journal of Pineal Research. 43(3). 289–293. 42 indexed citations

Oort, Bob van, N. J. C. Tyler, Menno P. Gerkema, Lars P. Folkow, & Karl‐Arne Stokkan. (2006). Where clocks are redundant: weak circadian mechanisms in reindeer living under polar photic conditions. Die Naturwissenschaften. 94(3). 183–194. 83 indexed citations

Oort, Bob van, N. J. C. Tyler, Menno P. Gerkema, et al.. (2005). Circadian organization in reindeer. Nature. 438(7071). 1095–1096. 142 indexed citations

Oort, Bob van, et al.. (2004). The performance and validation of a data logger for long-term determination of activity in free-ranging reindeer, Rangifer tarandus L.. Applied Animal Behaviour Science. 89(3-4). 299–308. 23 indexed citations

10.

Davidson, Alec J., Karl‐Arne Stokkan, Shin Yamazaki, & Michael Menaker. (2002). Food-anticipatory activity and liver per1-luc activity in diabetic transgenic rats. Physiology & Behavior. 76(1). 21–26. 52 indexed citations

11.

Stokkan, Karl‐Arne, R. J. Reiter, Lars P. Folkow, et al.. (1995). Pineal and Thyroid Functions in Newborn Seals. General and Comparative Endocrinology. 98(3). 321–331. 22 indexed citations

12.

Stokkan, Karl‐Arne, et al.. (1992). Age-Associated Reduction in Pineal Beta-Adrenergic Receptor Density Is Prevented by Life-Long Food Restriction in Rats. Neurosignals. 1(1). 34–39. 23 indexed citations

13.

Stokkan, Karl‐Arne, Rüssel J. Reiter, Mary K. Vaughan, Keico Okino Nonaka, & Alexander Lerchl. (1991). Endocrine and metabolic effects of life-long food restriction in rats. European Journal of Endocrinology. 125(1). 93–100. 15 indexed citations

14.

Lerchl, Alexander, Russel J. Reiter, Kimberly A. Howes, Keico Okino Nonaka, & Karl‐Arne Stokkan. (1991). Evidence that extremely low frequency Ca2+-cyclotron resonance depresses pineal melatonin synthesis in vitro. Neuroscience Letters. 124(2). 213–215. 57 indexed citations

15.

Withyachumnarnkul, Boonsirm, Rüssel J. Reiter, Alexander Lerchl, Keico Okino Nonaka, & Karl‐Arne Stokkan. (1991). Evidence that interferon-γ alters pineal metabolism both indirectly via sympathetic nerves and directly on the pinealocytes. International Journal of Biochemistry. 23(12). 1397–1401. 21 indexed citations

16.

Attia, Ahmed M., et al.. (1991). Parathion (O,O-dimethyl-O-p-nitrophenyl phosphorothioate) induces pineal melatonin synthesis at night. Brain Research Bulletin. 26(4). 553–557. 6 indexed citations

17.

Stokkan, Karl‐Arne, P. J. Sharp, Ian Dunn, & Robert Lea. (1988). Endocrine changes in photostimulated willow ptarmigan (Lagopus lagopus lagopus) and Svalbard ptarmigan (Lagopus mutus hyperboreus). General and Comparative Endocrinology. 70(1). 169–177. 26 indexed citations

18.

Klandorf, H., Karl‐Arne Stokkan, & P. J. Sharp. (1982). Plasma thyroxine and triiodothyronine levels during the development of photorefractoriness in Willow Ptarmigan (Lagopus lagopus lagopus) exposed to different photoperiods. General and Comparative Endocrinology. 47(1). 64–69. 9 indexed citations

19.

Stokkan, Karl‐Arne & P. J. Sharp. (1980). Seasonal changes in the concentrations of plasma luteinizing hormone and testosterone in willow ptarmigan (Lagopus lagopus lagopus) with observations on the effects of permanent short days. General and Comparative Endocrinology. 40(1). 109–115. 39 indexed citations

20.

Stokkan, Karl‐Arne. (1979). Testosterone and Daylength-Dependent Development of Comb Size and Breeding Plumage of Male Willow Ptarmigan (Lagopus lagopus lagopus). 96(1). 106–115. 40 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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