| Titre : | Journal of Ornithology 146(4) - OCT 2005 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
M. Lieser, Auteur ;
P. Berthold, Auteur ;
G. A. Manley, Auteur
We examined the sounds made by displaying male capercaillies on a lek in the Black Forest for infrasonic components. Vocalizations did not contain infrasound, whereas flutter jumps produced substantial low-frequency sound energy, with regularly [...]
Article
M. H. Sherfy, Auteur ;
R. L. Kirkpatrick, Auteur ;
K. E. Webb, Auteur
True metabolizable energy (TME) is a measure of avian dietary quality that accounts for metabolic fecal and endogenous urinary energy losses (EL) of non-dietary origin. The TME is calculated using a bird fed the test diet and an estimate of EL d[...]
Article
European starlings: nestling condition, parasites and green nest material during the breeding season
H. Gwinner, Auteur ;
S. Berger, Auteur
Male European starlings (Sturnus vulgaris) intermingle fresh herbs, preferably species rich in volatile compounds, into their dry nest material. In a field study, we investigated whether these herbs affect the mite and bacteria load of the nests[...]
Article
J. Dittami, Auteur ;
E. Gwinner, Auteur ;
B. Follett, Auteur ;
H. Prossinger, Auteur
An analysis of the circadian and circannual patterns of luteinizing hormone (LH) secretion in male European starlings (Sturnus vulgaris) held in outdoor aviaries is presented. On the basis of six daily time points, eight calendar dates, and seve[...]
Article
A. Roulin, Auteur ;
P. Bize, Auteur ;
N. Tzaud, Auteur ;
M. Bianchi, Auteur ;
P. A. Ravussin, Auteur ;
P. Christe, Auteur
In several colour polymorphic species, morphs differ in thermoregulation either because dark and pale surfaces absorb solar radiation to a different extent and/or because morphs differ in key metabolic processes. Morph-specific thermoregulation [...]
Article
S. O'Brien, Auteur ;
M. Hau, Auteur
Most temperate-zone birds live in environments with a regular seasonality, and primarily use the long-term changes in photoperiod as a cue to initiate gonadal development in anticipation of the breeding season. Short-term cues such as food and t[...]
Article
L. Reino, Auteur
The common waxbill Estrilda astrild was first introduced to Portugal, from Africa, in 1964, from where it has spread to much of the country and to Spain. We modelled the expansion of this species on a 20x20-km UTM grid in 4-year periods from 196[...]
Article
M. Raess, Auteur ;
E. Gwinner, Auteur
Long-distance migration is often associated with relatively short breeding seasons and a start of reproductive activities shortly after arrival. The full activation of the reproductive system from the regressed state takes, however, several week[...]
Article
F. Suarez, Auteur ;
J. Traba, Auteur ;
J. Herranz, Auteur
We analysed female body mass change, corrected by tarsus length (body condition) in tawny pipits Anthus campestris during the nesting period in a population subject to high nest predation rates (between 70 and 85%), which leads to the need for r[...]
Article
J. Komdeur, Auteur ;
S. Daan, Auteur
Despite the absence of pronounced changes in day length, there is considerable climatological seasonality in the tropics. Its expression can be complex like in the monsoon climate of the Indian Ocean Islands. The land mass distribution on both s[...]
Article
We investigated whether pineal is part of the circadian clock system which regulates circadian rhythms of activity and photosensitivity in the Indian weaver bird (Ploceus philippinus). Two experiments were performed. The first experiment examine[...]
Article
J. C. Wingfield, Auteur
Life cycles of birds and other vertebrates are composed of series of life history stages each with unique combinations of morphological, physiological and behavioral characteristics. For example, in the white-crowned sparrow, Zonotrichia leucoph[...]
Article
B. Helm, Auteur ;
E. Gwinner, Auteur
The day lengths to which migratory birds are exposed depend on the timing and course of their journey. While winter day length is known to influence vernal events, it is not clear if birds also use day length during the spring migration as a tem[...]
Article
W. Goymann, Auteur ;
B. Kempenaers, Auteur ;
J. Wingfield, Auteur
Many internal and environmental factors influence the growth of birds. Here we ask whether the reversed sexual dimorphism in the classically polyandrous black coucal is reflected in differential growth and fledging parameters of females and male[...]
