Metazoan-protozoan parasite co-infections and host body weight in St Kilda Soay sheep

Parasitology
B H CraigJ M Pemberton

Abstract

For hundreds of years, the unmanaged Soay sheep population on St Kilda has survived despite enduring presumably deleterious co-infections of helminth, protozoan and arthropod parasites and intermittent periods of starvation. Important parasite taxa in young Soay sheep are strongyles (Trichostrongylus axei, Trichostrongylus vitrinus and Teladorsagia circumcincta), coccidia (11 Eimeria species) and keds (Melophagus ovinus) and in older animals, Teladorsagia circumcincta. In this research, associations between the intensity of different parasite taxa were investigated. Secondly, the intensities of different parasite taxa were tested for associations with variation in host weight, which is itself a determinant of over-winter survival in the host population. In lambs, the intensity of strongyle eggs was positively correlated with that of Nematodirus spp. eggs, while in yearlings and adults strongyle eggs and coccidia oocysts were positively correlated. In lambs and yearlings, of the parasite taxa tested, only strongyle eggs were significantly and negatively associated with host weight. However, in adult hosts, strongyles and coccidia were independently and negatively associated with host weight. These results are consistent with the...Continue Reading

References

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Citations

May 7, 2010·Parasitology·Jennifer N LohrJustyna Wolinska
Jul 10, 2009·Proceedings. Biological Sciences·Adam D HaywardLoeske E B Kruuk
Mar 4, 2014·PloS One·Samuel M ThumbiMark E J Woolhouse
Aug 19, 2015·Experimental Gerontology·Adam D HaywardDaniel H Nussey
Oct 29, 2011·Annals of the New York Academy of Sciences·Simon A BabayanAmy B Pedersen
Dec 15, 2010·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Eleanore D SternbergJacobus C de Roode
Dec 1, 2012·International Journal for Parasitology. Parasites and Wildlife·Sarah A BudischakVanessa O Ezenwa
Aug 28, 2014·International Journal for Parasitology. Parasites and Wildlife·Erin E GorsichAnna E Jolles
Jun 6, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Graeme CoulsonIan Beveridge
Mar 4, 2021·Animal : an International Journal of Animal Bioscience·A PachecoJ Conington
Jun 8, 2021·Journal of Helminthology·Tessa CarrauRocío Ruiz de Ybáñez

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