D. O’Callaghan
Impact in
- Agronomy and Crop Science top 0.5%
- Reproductive Physiology in Livestock
- Ruminant Nutrition and Digestive Physiology
- Endocrine and Autonomic Systems top 10%
- Circadian rhythm and melatonin
Papers in
-
- Reproductive Physiology in Livestock 40
- Ruminant Nutrition and Digestive Physiology 2
- Livestock Farming and Management 1
-
- Pharmacological Effects and Assays 3
- Co-authors
- Maurice P. Boland (10 shared papers)P. Lonergan (6 shared papers)M.P. Boland (21 shared papers)J. F. ROCHE (8 shared papers)S. Snijders (6 shared papers)Pat Dillon (1 shared paper)Halimatun Yaakub (4 shared papers)Fred J. Karsch (5 shared papers)
- Journals
- Theriogenology (12 papers)Reproduction (7 papers)Animal Science (5 papers)Biology of Reproduction (4 papers)Animal Reproduction Science (4 papers)
- Partner nations
- IrelandUnited StatesUnited Kingdom
In The Last Decade
D. O’Callaghan
49 papers receiving 1.4k citations
Peers
Comparison fields: 5 of 47
- Agronomy and Crop Science 1.1k
- Endocrine and Autonomic Systems 67
- Reproductive Medicine 111
- Animal Science and Zoology 90
- Public Health, Environmental and Occupational Health 197
Countries citing papers authored by D. O’Callaghan
This map shows the geographic impact of D. O’Callaghan'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 D. O’Callaghan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites D. O’Callaghan more than expected).
Fields of papers citing papers by D. O’Callaghan
This network shows the impact of papers produced by D. O’Callaghan. 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 D. O’Callaghan. The network helps show where D. O’Callaghan may publish in the future.
Co-authors
The 25 scholars most cited alongside D. O’Callaghan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
Showing the 20 most-cited of 50 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | 2001 | 215 | |
| 2 | 1999 | 138 | |
| 3 | 2000 | 133 | |
| 4 | 2003 | 93 | |
| 5 | 1984 | 81 | |
| 6 | 1998 | 70 | |
| 7 | Follicular growth and ovulation rate in farm animals | 1987 | 61 |
| 8 | 1999 | 61 | |
| 9 | 1991 | 59 | |
| 10 | 2001 | 55 | |
| 11 | 1993 | 46 | |
| 12 | 2000 | 45 | |
| 13 | 2001 | 42 | |
| 14 | 1997 | 40 | |
| 15 | 1994 | 32 | |
| 16 | 1999 | 31 | |
| 17 | 1991 | 26 | |
| 18 | 1997 | 22 | |
| 19 | 1992 | 19 | |
| 20 | 1998 | 19 |
About D. O’Callaghan
D. O’Callaghan is a scholar working on Agronomy and Crop Science, Animal Science and Zoology, Reproductive Medicine, Endocrine and Autonomic Systems and Public Health, Environmental and Occupational Health, having authored 50 papers that have together received 1.5k indexed citations. Recurring topics across this work include Reproductive Physiology in Livestock (40 papers), Reproductive Biology and Fertility (5 papers), Pharmacological Effects and Assays (3 papers), Hypothalamic control of reproductive hormones (2 papers), Circadian rhythm and melatonin (2 papers), Ruminant Nutrition and Digestive Physiology (2 papers), Growth Hormone and Insulin-like Growth Factors (2 papers) and Livestock Farming and Management (1 paper). The work is most often cited by research in Agronomy and Crop Science (1.1k citations), Endocrine and Autonomic Systems (67 citations), Reproductive Medicine (111 citations), Animal Science and Zoology (90 citations) and Public Health, Environmental and Occupational Health (197 citations). D. O’Callaghan has collaborated with scholars based in Ireland, United States and United Kingdom. Frequent co-authors include Maurice P. Boland, P. Lonergan, M.P. Boland, J. F. ROCHE, S. Snijders, Pat Dillon, Halimatun Yaakub, Fred J. Karsch, James F. Roche and Robert T. Duby. Their work appears in journals such as Theriogenology, Reproduction, Animal Science, Biology of Reproduction and Animal Reproduction Science.
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.