Sociable Weaver biometrics and primary moult
نویسندگان
چکیده
منابع مشابه
Multistate estimates of survival and movement in relation to colony size in the sociable weaver
We estimated survival and movement probabilities in relation to breeding-colony size in the sociable weaver (Philetairus socius) by using multistate statistical methods, in which survival and movement to time t þ 1 is conditional on an individual’s colony size at time t. The sociable weaver is a colonial, cooperatively breeding species that builds a massive communal nest, with colony size rangi...
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The survival of small birds is often believed to increase with increasing body mass, despite some evidence that body mass is usually maintained below the physiological maximum and that there are costs associated with high body mass, such as increased energetic expenditure and predation risk. In this study, we used an eight-year dataset to investigate survival in relation to body mass in a wild ...
متن کاملMaternal Effects in Relation to Helper Presence in the Cooperatively Breeding Sociable Weaver
In egg laying species, breeding females may adjust the allocation of nutrients or other substances into eggs in order to maximise offspring or maternal fitness. Cooperatively breeding species offer a particularly interesting context in which to study maternal allocation because helpers create predictably improved conditions during offspring development. Some recent studies on cooperative specie...
متن کاملDivergent primary moult—A rare moult sequence among Western Palaearctic passerines
Wing morphology strongly affects flight performance which may consequently decline during feather moult due to the creation of feather gaps in the wing. Hence, the size and shape of moult-related wing gap may directly affect flight capacity. Here I examined the rare divergent primary moult sequence compared to the more common descendant moult sequence. In the divergent moult, the focus of prima...
متن کاملBreeding decisions and output are correlated with both temperature and rainfall in an arid-region passerine, the sociable weaver
Animal reproductive cycles are commonly triggered by environmental cues of favourable breeding conditions. In arid environments, rainfall may be the most conspicuous cue, but the effects on reproduction of the high inter- and intra-annual variation in temperature remain poorly understood, despite being relevant to the current context of global warming. Here, we conducted a multiyear examination...
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ژورنال
عنوان ژورنال: Ostrich
سال: 2004
ISSN: 0030-6525,1727-947X
DOI: 10.2989/00306520409485459