In the hyena world, there is simply no room for a weakling. As a result, siblicide victors achieved a long-term growth rate similar to that of singletons and thus significantly increased their expected survival. 1991). Rather than functioning to routinely kill one’s sibling, the purpose of the early fighting observed between hyena littermates is to establish an unambiguous dominance relationship within the litter (Wahaj et al., 2007). In the Serengeti National Park, Tanzania, large fluctuations of prey abundance alters the frequency at which... References. Previously, siblicide in spotted hyenas was suggested to be "habitual" in twin litters composed of siblings of the same sex and to be restricted to neonates within the first 2 weeks of life (Frank et al. Siblicide in Serengeti spotted hyenas: a long-term study of maternal input and cub survival Abstract. First, we tested predictions of obligate and facultative hypotheses by using ultrasonography to compare litter size before and … Siblicide in the spotted hyena is facultative in that it occurs only in some twin litters. Here, we used this approach to examine whether siblicide in spotted hyenas (Crocuta crocuta) is obligate or facultative.
Siblicide is more likely to occur in hyena communities where food sources are not steady. The most aggressive pups are likely to obtain the greatest share of mom’s milk. Indeed, hyena moms often allow an aggressive pup to edge its sibling out of a meal time and time again until it starves to death.
Siblicide is common in hyena litters.
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