Tag: all of Luscinia

Age-Related Variation in Mate-Guarding Intensity in the Bluethroat (Luscinia s. svecica)

Bluethroat (Luscinia svecica) Science Article 1 abstract Female extra-pair copulations (EPCs) have selected for male paternity guarding strategies in many bird species. In the bluethroat, Luscinia s. svecica, males guard their mates closely during the last 2 d before the start of egg laying, but there is great individual variation in the intensity of mate […]

Rejection of cuckoo Cuculus canorus eggs in relation to female age in the bluethroat Luscinia svecica

Bluethroat (Luscinia svecica) Science Article 5 abstract The evolutionary equilibrium hypothesis explains the existence of both acceptors and rejecters of brood parasite eggs within a host population as resulting from a balance between the costs of acceptance and the costs of recognition errors. In such equilibria conditional responses may play an important role. One such […]

Estimated effects of age and sex on the fat-free body mass of autumn migrating Bluethroats Luscinia svecica svecica.

Bluethroat (Luscinia svecica) Science Article 9 abstract If constant and size-specific values of the fat-free body mass are used for estimating the fat content of migrating birds, it is required that the fat-free body mass does not vary considerably between age and sex groups. To test this requirement, body masses of autumn migrating Blue-throats from […]

Nestling sex ratios in a population of Bluethroats Luscinia svecicainferred from AFLP

Bluethroat (Luscinia svecica) Science Article 21 abstract We studied the sex ratio of Bluethroat Luscinia svecica broods using AFLPs. Our aim was to test whether there is a bias towards males that could be explained by sexual selection theories, or conversely, a bias towards females that could help explain the female-biased sex ratio among juveniles […]

Do weather conditions affect the frequency of extra-pairpaternity in the bluethroat (Luscinia svecica svecica)?

Bluethroat (Luscinia svecica) Science Article 8 abstract Ecological factors may affect levels of extra-pair paternity (EPP) by influencing the costs and benefits of extra-paircopulation. During a 10-year study of a Norwegian bluethroat population, the frequency of EPP has varied extensively (8%-76% nests with EPP, 7%-33% extra-pair offspring among years). Here, we investigate whether socio-ecological factors(breeding […]

Recent divergence betweentwo morphologically different subspecies of bluethroat (Aves: Muscicapidae: Luscinia svecica)inferred from mitochondrial DNA sequence variation

Bluethroat (Luscinia svecica) Science Article 13 abstract Recent divergence betweentwo morphologically different subspecies of bluethroat (Aves: Muscicapidae: Luscinia svecica)inferred from mitochondrial DNA sequence variation Questiau S, Eybert M-C, Gaginskaya AR, Gielly L & Taberlet P, Mol Ecol 7: 239-245 Download article download full text (pdf)

Seasonal and diurnal patterns of singing and song-flight activity in bluethroats (Luscinia svecica)

Bluethroat (Luscinia svecica) Science Article 6 abstract To assess the functions of male song in Bluethroat (Luscinia svecica svecica), seasonal and diurnal patterns of song and song-flight activity were analyzed by using data on individually marked birds. The seasonal patterns of singing and song-flight activity were found to peak shortly after male arrival and before […]

Amplified fragment length polymorphism (AFLP) markersreveal extra-pair parentage in a bird species: the bluethroat(Luscinia svecica)

Bluethroat (Luscinia svecica) Science Article 15 abstract We tested the use of amplified fragment length polymorphism (AFLP) to assess the frequencyof extra-pair parentage in a bluethroat (Luscinia svecica namnetum) population.Thirty-six families totalling 162 nestlings were analysed. Using a combination of threeprimer pairs, we reached an exclusion probability of 93% for the population. S. QUESTIAU, M.C. […]

Ultraviolet colour vision and ornamentationin bluethroats

Bluethroat (Luscinia svecica) Science Article 18 abstract Many birds see in the ultraviolet (300^400 nm), but there is limited evidence for colour communication (signalling by spectral shape independently of brightness) in this hidden’ waveband. Such data are critical for the understanding of extravagant plumage colours STAFFAN ANDERSSON AND TROND AMUNDSEN, Proc. R. Soc. Lond. B […]