Chough (Pyrrhocorax pyrrhocorax) Science Article 3 abstract Identifying which age-specific demographic rates underlie variation in a population’s growth rate (?) is an important step towards understanding the population’s dynamics. Using data from a 20-year study of marked individuals, we describe patterns of demographic variation and covariation in the Scottish red-billed chough population (Pyrrhocorax pyrrhocorax), and […]
Category: Passeriformes
Breeding density and distribution of Choughs Pyrrhocorax pyrrhocorax nesting in river cliffs: The role of nest-site availability.
Chough (Pyrrhocorax pyrrhocorax) Science Article 2 abstract The breeding abundance of Choughs Pyrrhocorax pyrrhocorax was investigated in relation to type of rock and related features of nesting cliffs along rivers in south-eastern Madrid (Central Spain). Gypsum cliffs are larger and provide more nest sites than clay and limestone cliffs. Cliffs used by breeding Choughs contained […]
Age-specific reproductive performance in red-billed choughs Pyrrhocorax pyrrhocorax: patterns and processes in a natural population
Chough (Pyrrhocorax pyrrhocorax) Science Article 5 abstract Using data from a 20-year study of individually marked red-billed choughs, we examine how reproductive performance varies with age in male and female breeders, and investigate whether population-level trends result from changes in individual performance and/or the phenotypic composition of the breeding population. Across the population, mean clutch […]
Environmental variability, life-history covariation and cohort effects in the red-billed chough Pyrrhocorax pyrrhocorax
Chough (Pyrrhocorax pyrrhocorax) Science Article 4 abstract The consequences of environmental variability for life-history evolution are predicted to depend on the pattern of covariation amongst life-history traits. Using data from a 20-year study of individually marked red-billed choughs, we investigate the short- and long-term life-history consequences of population-wide variation in reproductive conditions, and demonstrate clear […]
Demographic consequences of prey availabilityand diet of Red-billed Choughs Pyrrhocoraxpyrrhocorax
Chough (Pyrrhocorax pyrrhocorax) Science Article 6 abstract Capsule Variation in prey availability appears to influence Chough fledging success and juvenile survival. Aims To determine seasonal and annual variations in Chough prey and how these influence fledging success and juvenile survival. CHRISTIAN KERBIRIOU and ROMAIN JULLIARD, Bird Study (2007) 54, 296-306 Download article download full text […]
Chaffinch Fringilla coelebs foraging patterns,nestling survival and territory distribution onlowland farmland
Chaffinch (Fringilla coelebs) Science Article 3 abstract Numbers of many bird species which breed on farmland, and are reliant oncropped land for feeding or nesting, declined between the 1960s and 1990s. Incontrast, Chaffinch Fringilla coelebs numbers increased on farmland over thesame period. This study investigates the influence of both cropped and noncroppedland on Chaffinches foraging […]
Structural conservation and variation in the mitochondrial control region of fringilline finches (Fringilla spp.) and the greenfinch (Carduelis chloris
Chaffinch (Fringilla coelebs) Science Article 2 abstract We sequenced the entire control region and portions of flanking genes (tRNAPhe, tRNAGiu, and ND6) in the common chaffinch (Fringilla coelebs), blue chaffinch (F. teydea), brambling (F. montifringilla), and greenfinch (Carduelis chloris). In these finches the control region is similar in length (1,223-1,237 bp) and has the same […]
MOLECULAR SYSTEMATICS, PHYLOGEOGRAPHY, AND POPULATION GENETICSOF XIPHORHYNCHUS (AVES: DENDROCOLAPTIDae) IN THE AMAZON BASIN
Chestnut-rumped Woodcreeper (Xiphorhynchus pardalotus) Science Article 1 abstract Among those few hypotheses amenable to falsification by phylogenetic methods concerning the diversification of the Amazonian biota, three can be singled out because of their verifiable predictions: the riverine barrier, the gradient, and the basal trichotomy hypotheses. I used phylogenetic and population genetics methods to reconstruct the […]
Interspecific song learning in a wild Chestnut-sided Warbler.
Chestnut-sided Warbler (Dendroica pensylvanica) Science Article 2 abstract Vocal learning involving imitation is the prevalent mode of song development in songbirds. The evidence for vocal learning both from experimental studies and from local song variants shared among neighbors (dialects) indicates that songbirds generally learn from their own species, and that a genetically determined signal recognition […]
EXTRAPAIR PATERNITY INCREASES VARIABILITY INMALE REPRODUCTIVE SUCCESS IN THE CHESTNUT-SIDEDWARBLER (DENDROICA PENSYLVANICA), A SOCIALLYMONOGAMOUS SONGBIRD
Chestnut-sided Warbler (Dendroica pensylvanica) Science Article 1 abstract A monogamous mating system that includes extrapair fertilization can potentially generate higher variability in male reproductive success than monogamy without extrapair fertilization. That increased variability could provide a correspondingly higher opportunity for sexual selection and, thus, for the origin and persistence of sexual dimorphism in monogamous species. […]