Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Ralph W. Schreiber"'
Autor:
Ralph W. Schreiber, Sharon L. Milder
Publikováno v:
Ibis. 131:99-111
We describe the vocalizations of the Christmas Island Warbler Acrocephalus aequinoctialis, endemic to Christmas and Washington Islands, central Pacific Ocean, in the absence of other land birds and natural predators. Its vocal signals are simple when
Autor:
Ralph W. Schreiber, N. Philip Ashmole
Publikováno v:
Ibis. 112:363-394
Summary Christmas Island, at 2° N, 157° W in the Central Pacific Ocean, supports 18 breeding species of sea-birds. Data on the breeding seasons collected by the authors and other visitors to the island are analyzed in individual species accounts. P
Publikováno v:
The Condor. 108:736-741
On 11 July 1985, an albino juvenile Great Frigatebird (Fregata minor) was collected by RWS and EAS on Christmas Island (2°N, 157°W) in the tropical Pacific. First observed on 13 July 1984 as a 55–60-day-old chick, the albino was seen flying about
Publikováno v:
The Auk. 120:811-817
Survival of Brown Boobies (Sula leucogaster) at Johnston Atoll was examined over a 17-year period using capture-mark-recapture analysis. Annual adult survival was estimated to be 0.90 ± 0.01 (SE). Variation in survival did not correspond to either l
Publikováno v:
The Auk. 120:811-817
Autor:
Ralph W. Schreiber
Publikováno v:
BioScience. 30:742-747
Publikováno v:
Contributions in science. 402:1-43
Publikováno v:
The Auk. 105:365-368
Publikováno v:
The Auk. 92:649-654
METHODS of prey capture are of considerable interest to biologists. Fish-eating birds have been studied extensively (cf. Ashmole 1971) and, among seabirds, the order Pelecaniformes provides a diverse assemblage of capture methods. Owre (1967) describ
Publikováno v:
Journal of Mammalogy. 55:469-472