True Facts: Hippopotamus 

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Dr Eduardo J Fernandez, University of Adelaide
Dr Jonas Schoelynck, University of Antwerp
Dr Julio de Castro
Dr Frank Fish, West Chester University
Dr Maria Maust-Mohl, Manhattan College
Dr Christopher Dutton, University of Florida
Dr Joseph Dudley, University of Alaska
Dr Todd McWhorter, University of Adelaide
Dr Victoria Inman, NSW Dept. of Planning and Environment
Dr Philip Gingerich, University of Michigan
Dr Rebecca Lewison, San Diego State University
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Citations
Barklow, William E. Amphibious communication with sound in hippos, Hippopotamus amphibius, Animal Behaviour, Volume 68, Issue 5, 2004, Pages 1125-1132, ISSN 0003-3472, doi.org/10.1016/j.anbehav.200....
Blowers, Tracy, "Social Grouping Behaviors Of Captive Female Hippopotamus Amphibius" (2008). Electronic Theses and Dissertations. 3459.
stars.library.ucf.edu/etd/3459
Coughlin, Brittany L. , Frank E. Fish, Hippopotamus Underwater Locomotion: Reduced-Gravity Movements for a Massive Mammal, Journal of Mammalogy, Volume 90, Issue 3, 2 June 2009, Pages 675-679, doi.org/10.1644/08-MAMM-A-279R.1
Dudley, J.P., Hang'Ombe, B.M., Leendertz, F.H., Dorward, L.J., de Castro, J., Subalusky, A.L. and Clauss, M. (2016), Carnivory by hippos and ecology of anthrax. Mammal Review, 46: 191-203. doi.org/10.1111/mam.12056
Dutton, C.L., Subalusky, A.L., Sanchez, A. et al. The meta-gut: community coalescence of animal gut and environmental microbiomes. Sci Rep 11, 23117 (2021). doi.org/10.1038/s41598-021-02...
Gatesy J, Hayashi C, Cronin MA, Arctander P. Evidence from milk casein genes that cetaceans are close relatives of hippopotamid artiodactyls. Mol Biol Evol. 1996 Sep;13(7):954-63. doi: 10.1093/oxfordjournals.molbev.a025663. PMID: 8752004.
Geisler, J., Theodor, J. Hippopotamus and whale phylogeny. Nature 458, E1-E4 (2009). doi.org/10.1038/nature07776
Gingerich PD, Haq Mu, Zalmout IS, Khan IH, Malkani MS. Origin of whales from early artiodactyls: hands and feet of Eocene Protocetidae from Pakistan. Science. 2001 Sep 21;293(5538):2239-42. doi: 10.1126/science.1063902. Epub 2001 Sep 19. PMID: 11567134.
Graeme, Shannon, Sadler Phoebe, Smith Joanna, Roylance-Casson Eleanor and Cordes Line S. 2021Contrasting selection pressure on body and weapon size in a polygynous megaherbivoreBiol. Lett.172021036820210368, doi.org/10.1098/rsbl.2021.0368
Gray NM, Kainec K, Madar S, Tomko L, Wolfe S. Sink or swim? Bone density as a mechanism for buoyancy control in early cetaceans. Anat Rec (Hoboken). 2007 Jun;290(6):638-53. doi: 10.1002/ar.20533. PMID: 17516430.
Inman VL, Kingsford RT, Chase MJ, Leggett KEA (2019) Drone-based effective counting and ageing of hippopotamus (Hippopotamus amphibius) in the Okavango Delta in Botswana. PLoS ONE 14(12): e0219652. doi.org/10.1371/journal.pone.....
McCauley, D. J., T. E. Dawson, M. E. Power, J. C. Finlay, M. Ogada, D. B. Gower, K. Caylor, W. D. Nyingi, J. M. Githaiga, J. Nyunja, F. H. Joyce, R. L. Lewison, and J. S. Brashares. 2015. Carbon stable isotopes suggest that hippopotamus-vectored nutrients subsidize aquatic consumers in an East African river. Ecosphere 6(4):52. dx.doi.org/10.1890/ES14-00514.1
Maust-Mohl, M., Reiss, D. and Reidenberg, J.S. (2019), A Comparison of Common Hippopotamus (Artiodactyla) and Mysticete (Cetacea) Nostrils: An Open and Shut Case. Anat Rec, 302: 693-702. doi.org/10.1002/ar.24032
Maust-Mohl, M., Soltis, J., & Reiss, D. (2018). Underwater click train production by the hippopotamus (Hippopotamus amphibius) suggests an echo-ranging function, Behaviour, 155(2-3), 231-251. doi: doi.org/10.1163/1568539X-0000...
Saikawa, Y., Hashimoto, K., Nakata, M. et al. The red sweat of the hippopotamus. Nature 429, 363 (2004). doi.org/10.1038/429363a
Sulman J R, Madelyn G C, Irina A K. Correlation of Bone Density in Aquatic and Semiaquatic Animals to Ecological and Dietary Specializations. Open Acc Res Anatomy. 2(3). OARA.000537.2020.
DOI: 10.31031/OARA.2020.02.000537

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