I.E.J. Barnhoorn

1.1k total citations
39 papers, 880 citations indexed

About

I.E.J. Barnhoorn is a scholar working on Health, Toxicology and Mutagenesis, Aquatic Science and Physiology. According to data from OpenAlex, I.E.J. Barnhoorn has authored 39 papers receiving a total of 880 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Health, Toxicology and Mutagenesis, 16 papers in Aquatic Science and 11 papers in Physiology. Recurrent topics in I.E.J. Barnhoorn's work include Environmental Toxicology and Ecotoxicology (13 papers), Reproductive biology and impacts on aquatic species (11 papers) and Fish Ecology and Management Studies (10 papers). I.E.J. Barnhoorn is often cited by papers focused on Environmental Toxicology and Ecotoxicology (13 papers), Reproductive biology and impacts on aquatic species (11 papers) and Fish Ecology and Management Studies (10 papers). I.E.J. Barnhoorn collaborates with scholars based in South Africa, United States and France. I.E.J. Barnhoorn's co-authors include Riana Bornman, G. M. Pieterse, J C van Dyk, G.M. Wagenaar, J.H.J. Van Vuren, Hindrik Bouwman, M. J. Marchand, L Robson, C.E.J. Van Rensburg and WR Harding and has published in prestigious journals such as The Science of The Total Environment, Environmental Health Perspectives and Chemosphere.

In The Last Decade

I.E.J. Barnhoorn

38 papers receiving 844 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
I.E.J. Barnhoorn South Africa	17	511	270	180	158	130	39	880
J C van Dyk South Africa	13	567 1.1×	202 0.7×	229 1.3×	90 0.6×	103 0.8×	22	972
G. M. Pieterse South Africa	11	474 0.9×	177 0.7×	242 1.3×	152 1.0×	136 1.0×	14	716
Aina O. Adeogun Nigeria	17	462 0.9×	331 1.2×	119 0.7×	115 0.7×	48 0.4×	50	833
Knud Ladegaard Pedersen Denmark	20	731 1.4×	355 1.3×	193 1.1×	379 2.4×	96 0.7×	32	1.1k
Éric Thybaud France	14	470 0.9×	370 1.4×	62 0.3×	153 1.0×	74 0.6×	33	783
M. A. Bistoni Argentina	12	469 0.9×	342 1.3×	116 0.6×	55 0.3×	109 0.8×	17	754
Catarina Cruzeiro Portugal	24	616 1.2×	623 2.3×	79 0.4×	180 1.1×	42 0.3×	52	1.1k
Joanna Łuczyńska Poland	15	343 0.7×	223 0.8×	267 1.5×	106 0.7×	56 0.4×	49	842
Usama M. Mahmoud Egypt	18	516 1.0×	156 0.6×	299 1.7×	128 0.8×	62 0.5×	38	929
Seiichi Uno Japan	21	582 1.1×	382 1.4×	84 0.5×	85 0.5×	43 0.3×	76	1.1k

Countries citing papers authored by I.E.J. Barnhoorn

Since Specialization

Citations

This map shows the geographic impact of I.E.J. Barnhoorn'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 I.E.J. Barnhoorn with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites I.E.J. Barnhoorn more than expected).

Fields of papers citing papers by I.E.J. Barnhoorn

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by I.E.J. Barnhoorn. 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 I.E.J. Barnhoorn. The network helps show where I.E.J. Barnhoorn may publish in the future.

Co-authorship network of co-authors of I.E.J. Barnhoorn

This figure shows the co-authorship network connecting the top 25 collaborators of I.E.J. Barnhoorn. A scholar is included among the top collaborators of I.E.J. Barnhoorn 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 I.E.J. Barnhoorn. I.E.J. Barnhoorn 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

Barnhoorn, I.E.J., et al.. (2025). Screening of Pharmaceuticals in Surface Waters from Vhembe District, Limpopo Province, South Africa. Water. 17(3). 379–379. 1 indexed citations

Barnhoorn, I.E.J., et al.. (2025). The Effects of Acute Aldrin Exposure on the Liver and Kidney of the African Sharptooth Catfish, Clarias gariepinus (Burchell, 1822). Environments. 12(12). 481–481.

Barnhoorn, I.E.J., et al.. (2022). Developmental abnormalities and growth patterns in juvenile Oreochromis mossambicus chronically exposed to efavirenz. Emerging contaminants. 8. 83–89. 8 indexed citations

Barnhoorn, I.E.J., et al.. (2020). The first report of selected herbicides and fungicides in water and fish from a highly utilized and polluted freshwater urban impoundment. Environmental Science and Pollution Research. 27(26). 33393–33398. 12 indexed citations

Aneck-Hahn, Natalie, et al.. (2020). Endocrine-disrupting activity of the fungicide mancozeb used in the Vhembe District of South Africa. African Journal of Aquatic Science. 46(1). 100–109. 2 indexed citations

Barnhoorn, I.E.J., et al.. (2019). Assessing the potential effects of nevirapine in South African surface water on fish growth: A chronic exposure of Oreochromis mossambicus. South African Journal of Science. 115(3/4). 6 indexed citations

Barnhoorn, I.E.J., et al.. (2019). The urogenital papillae as an indicator of sexual maturity in male African catfish, Clarias gariepinus, (Burchell, 1822). Aquaculture Research. 50(12). 3519–3527. 5 indexed citations

Barnhoorn, I.E.J., et al.. (2019). Nevirapine in African surface waters induces liver histopathology in Oreochromis mossambicus: A laboratory exposure study. African Journal of Aquatic Science. 44(1). 77–88. 12 indexed citations

Barnhoorn, I.E.J., et al.. (2018). The effects of environmentally relevant concentrations of aldrin and methoxychlor on the testes and sperm of male Clarias gariepinus (Burchell, 1822) after short-term exposure. Fish Physiology and Biochemistry. 44(6). 1421–1434. 12 indexed citations

10.

Barnhoorn, I.E.J., et al.. (2018). Hatching success and survival of fish early life stages in a chronic exposure to nevirapine: a case study of the Mozambique tilapia. International Journal of Environmental Health Research. 29(4). 441–456. 6 indexed citations

11.

Bornman, Riana, Natalie Aneck-Hahn, C. de Jager, et al.. (2017). Endocrine Disruptors and Health Effects in Africa: A Call for Action. Environmental Health Perspectives. 125(8). 85005–85005. 37 indexed citations

12.

Bouwman, Hindrik, et al.. (2015). First report of the concentrations and implications of DDT residues in chicken eggs from a malaria-controlled area. Chemosphere. 137. 174–177. 16 indexed citations

13.

Barnhoorn, I.E.J., J C van Dyk, Bettina Genthe, et al.. (2014). Organochlorine pesticide levels in Clarias gariepinus from polluted freshwater impoundments in South Africa and associated human health risks. Chemosphere. 120. 391–397. 50 indexed citations

14.

Barnhoorn, I.E.J., et al.. (2012). Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study. African Journal of Aquatic Science. 37(1). 39–48. 37 indexed citations

15.

Vuren, J.H.J. Van, et al.. (2009). Histopathological changes in the reproductive system (ovaries and testes) of Oreochromis mossambicus following exposure to DDT. Environmental Toxicology and Pharmacology. 28(1). 133–139. 37 indexed citations

16.

Barnhoorn, I.E.J., Riana Bornman, C.E.J. Van Rensburg, & Hindrik Bouwman. (2009). DDT residues in water, sediment, domestic and indigenous biota from a currently DDT-sprayed area. Chemosphere. 77(9). 1236–1241. 55 indexed citations

17.

Marchand, M. J., J C van Dyk, G. M. Pieterse, I.E.J. Barnhoorn, & Riana Bornman. (2008). Histopathological alterations in the liver of the sharptooth catfish Clarias gariepinus from polluted aquatic systems in South Africa. Environmental Toxicology. 24(2). 133–147. 65 indexed citations

18.

Barnhoorn, I.E.J., et al.. (2008). Testicular apoptosis in feral Clarias gariepinus using TUNEL and cleaved caspase-3 immunohistochemistry. Ecotoxicology and Environmental Safety. 71(1). 41–46. 22 indexed citations

19.

Barnhoorn, I.E.J., Riana Bornman, G. M. Pieterse, & J.H.J. Van Vuren. (2004). Histological evidence of intersex in feral sharptooth catfish (Clarias gariepinus) from an estrogen‐polluted water source in Gauteng, South Africa. Environmental Toxicology. 19(6). 603–608. 90 indexed citations

20.

Barnhoorn, I.E.J., J.H.J. Van Vuren, & H.H. Du Preez. (1999). Sublethal effects of manganese on the carbohydrate metabolism ofOreochromis mossambicusafter acute and chronic exposure. South African Journal of Zoology. 34(3). 102–107. 9 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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