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Horse blind date could lead to loss of foal
Date:3/29/2011

Foetal loss is a common phenomenon in domestic horses after away-mating, according to Luděk Barto and colleagues, from the Institute of Animal Science in the Czech Republic. When mares return home after mating with a foreign stallion, they either engage in promiscuous mating with the home males to confuse paternity, or, failing that, the mares abort the foal to avoid the likely future infanticide by the dominant home male. The study is published online in the Springer journal Behavioral Ecology and Sociobiology.

In the Czech Republic, it is common practice for domestic horse mares to be removed from their home environment and transported elsewhere for mating. After conceiving, they are returned back into their home environments and social groups, often with familiar males. The authors looked at whether there was a link between the common practice of away-mating and foetal loss.

They distributed a questionnaire on reproduction to private horse owners in the Czech Republic through an equine internet server. They compared the frequency of abortion between mares which had conceived with a home stallion and those mated with a foreign stallion. They then looked at the sexual behavior of mares returning from away-mating.

Mares mated with a foreign stallion aborted in 31 percent of cases while none of the mares mated within the home stable aborted. Furthermore, mares were more likely to have disrupted pregnancies when home males were in adjacent enclosures.

Barto and colleagues' results uncover a new phenomenon in domestic horses: a female counter-strategy to male infanticide. It appears that domestic mares choose not to raise foals fathered by stallions outside the home herd. If the dominant home male is not the father, he may subsequently attempt infanticide. Two things happen as a result. Either mares manipulate the males' paternity assessment by promiscuous mating with home males. Alternatively, if the mares are physically u
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Contact: Hanna Sigmann
hanna.sigmann@springer.com
49-622-148-78414
Springer
Source:Eurekalert

Page: 1 2

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