Helminths of saiga antelope in Kazakhstan: implications for conservation and livestock production

ER Morgan, B Shakenov, PR Torgerson, GF Medley, EJ Milner-Gulland

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Abstract

ABSTRACT: Saiga antelopes (Saiga tatarica) graze extensively on livestock pasture, potentially enabling transmission of a wide range of parasitic helminths between saigas and domestic ruminants. A survey of the Russian language literature reveals that 36 of the 38 species of helminth that have been found in saigas in Kazakhstan in the past have also been found in domestic livestock. We examined 133 saigas culled for meat in autumn 1997, and found 3 species of cestode and 12 nematodes (9 in the abomasum), but no trematodes or lungworms. The most abundant species were Marshallagia marshalli, Marshallagia mongolica and Nematodirus gazellae in the abomasum, Nematodirus gazellae in the small intestine, and Skrjabinema ovis in the large intestine. There was no clear relationship between abomasal nematodosis and body condition. Age-intensity patterns differed between species: N. gazellae burdens were highest in saigas around 2-3 years old, and declined in older animals, whilst the intensity of Marshallagia spp. rose asymptotically with age. Fecal egg density was directly proportional to adult worm burden across ages for Marshallagia spp., but only in young animals for N. gazellae. There was no evidence that helminths, at the levels observed, adversely affect saiga populations. The host range of many of the parasites found is broad, and transmission between saigas and livestock in both directions might become important to agriculture and conservation as livestock numbers recover. Simplified sampling techniques used in this study, and statistical analysis based on bootstrapping, could prove useful in other parasitological surveys of wildlife in remote areas.
Original languageUndefined/Unknown
Pages (from-to)149 - 162
JournalJournal of wildlife diseases
Volume41(1)
Publication statusPublished - 2005

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