| Titre : | Journal of Avian Biology 32(1) - MAR 2001 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
E. L. O'Brien, Auteur ;
B. L. Morrison, Auteur ;
L. S. Johnson, Auteur
We compared haematocrits and blood haemoglobin concentrations of nestling House Wrens Troglodytes aedon in nests with relatively large numbers of haematophagous larvae of the blow fly Protocalliphora parorum (> 6.4 large larvae/nestling) and nes[...]
Article
N. Kjellen, Auteur ;
M. Hake, Auteur ;
T. Alerstam, Auteur
Breeding Ospreys were studied in southern Sweden and 13 birds were tracked by satellite telemetry on autumn migration to the African wintering grounds. This was supplemented with studies of migrating birds at Falsterbo and radar trackings From s[...]
Article
M. Hake, Auteur ;
N. Kjellen, Auteur ;
T. Alerstam, Auteur
Autumn migration routes and orientation of Swedish Ospreys Pandion haliaetus were studied by satellite tracking of 18 birds. Of these. 13 could be followed during the entire migration (6 females, 5 males and 2 juveniles). Most birds migrated acr[...]
Article
L. Zanette, Auteur
The distribution of individuals among habitats that vary in quality (i.e. resource availability) may affect reproductive output at a population level. I compared indicators of habitat quality including the breeding experience ratios (inexperienc[...]
Article
L. A. Ellis, Auteur ;
D. W. Borst, Auteur ;
C. F. Thompson, Auteur
Synchronously and asynchronously hatching clutches of House Wrens Troglodytes aedon usually do nor differ in reproductive success. Thus late-hatching nestlings in asynchronously hatching clutches somehow overcome any age- and size-related disadv[...]
Article
K. J. McGraw, Auteur ;
A. M. Stoehr, Auteur ;
P. M. Nolan, Auteur ;
G. E. Hill, Auteur
Darwin (1871) and later Fisher (1958) suggested that sexual selection can drive the evolution of ornamental traits in monogamous species when female preferences for these traits allow well-ornamented males to begin breeding earlier in a season a[...]
Article
M. Irestedt, Auteur ;
U. S. Johansson, Auteur ;
T. J. Parsons, Auteur ;
P. G. P. Ericson, Auteur
Phylogenetic relationships among major groups of passeriform birds were studied by analyses of nucleotide sequence data from two nuclear genes, c-myc and RAG-1. The results corroborated both the monophyly of the order Passeriformes, and the majo[...]
Article
R. P. Wilson, Auteur ;
R. Locca, Auteur ;
J. A. Scolaro, Auteur ;
S. Laurenti, Auteur ;
J. Upton, Auteur ;
H. Gallelli, Auteur ;
E. Frere, Auteur ;
P. Gandini, Auteur
The behaviour of Magellanic Penguins Spheniscus magellanicus commuting between their foraging areas and breeding areas in San Julian Bay, Argentina was studied to examine whether tidal rip currents affected travelling patterns. Although there wa[...]
Article
D. J. Green, Auteur
I examined age effects on reproduction in the Brown Thornbill Acanthiza pusilla in Canberra, Australia. I found that the reproductive performance of both males and females improved with age, although only age-related improvement in male performa[...]
Article
A. Pilastro, Auteur ;
L. Biddau, Auteur ;
G. Marin, Auteur ;
T. Mingozzi, Auteur
We studied the reproductive strategy of a Rock Sparrow Petronia petronia population. breeding in nest boxes in the Western Alps (Italy). Over seven years of study (1991-1997) 19% of the females laid second clutches after successfully fledging th[...]
Article
H. Poysa, Auteur ;
P. Runko, Auteur ;
V. Ruusila, Auteur ;
M. Milonoff, Auteur
We used data from three Common Goldeneye Bucephala clangula populations in Finland to study if the variation between females in egg morphology, as measured using a method developed by Eadie (1989), can be used to identify parasitized clutches, E[...]
Article
J. L. Longmire, Auteur ;
J. L. Roach, Auteur ;
M. Malthie, Auteur ;
P. S. White, Auteur ;
O. L. Tatum, Auteur ;
K. D. Makova, Auteur ;
D. C. Hahn, Auteur
Article
J. K. Christians, Auteur ;
T. D. Williams, Auteur
Egg mass shows large intraspecific variation in birds and is repeatable within individuals. The mechanisms underlying this variation are unknown. We hypothesized that measures of egg quality (the mass of yolk protein, yolk lipid, and albumen pro[...]
Article
Erin L. O'Brien, Auteur ;
Brian L. Morrison, Auteur ;
L. Scott Johnson, Auteur
We compared haematocrits and blood haemoglobin concentrations of nestling House Wrens Troglodytes aedon in nests with relatively large numbers of haematophagous larvae of the blow fly Protocalliphora parorum (> 6.4 large larvae/nestling) and nes[...]
Article
V. Ruusila, Auteur ;
H. Poysa, Auteur ;
P. Runko, Auteur
Recent studies on the function of female plumage characteristics have yielded ambiguous results. Some studies have found an association between different physiological, ecological or behavioural traits and female plumage, while others have found[...]
