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Titolo:
Selection of habitats by Emperor Geese during brood rearing
Autore:
Schmutz, JA;
Indirizzi:
US Geol Survey, Alaska Biol Sci Ctr, Anchorage, AK 99503 USA US Geol Survey Anchorage AK USA 99503 ol Sci Ctr, Anchorage, AK 99503 USA
Titolo Testata:
WATERBIRDS
fascicolo: 3, volume: 24, anno: 2001,
pagine: 394 - 401
SICI:
1524-4695(200112)24:3<394:SOHBEG>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
YUKON-KUSKOKWIM DELTA; GREATER SNOW GEESE; BLACK BRANT; GOOSE BROODS; CANADA-GEESE; AVAILABILITY; SURVIVAL; FOOD; ALASKA; TRIANGULATION;
Keywords:
Auser canagicus; body size; brood habitats; Chen canagica; competition; compositional analysis; Emperor Geese; habitat selection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Schmutz, JA US Geol Survey, Alaska Biol Sci Ctr, 1011 E Tudor Rd, Anchorage, AK 99503 USA US Geol Survey 1011 E Tudor Rd Anchorage AK USA 99503 9503 USA
Citazione:
J.A. Schmutz, "Selection of habitats by Emperor Geese during brood rearing", WATERBIRDS, 24(3), 2001, pp. 394-401

Abstract

Although forage quality strongly affects gosling growth and consequently juvenile survival, the relative use of different plant communities by brood rearing geese has been poorly studied. On the Yukon-Kuskokwim Delta, Alaska, population growth and juvenile recruitment of Emperor Geese (Chen canagica) are comparatively low, and it is unknown whether their selection of habitats during brood rearing differs from other goose species. Radio-telemetrywas used to document the use of habitats by 56 families of Emperor Geese in a 70 km(2) portion of the Yukon-Kuskokwim Delta during brood rearing in 1994-1996. When contrasted with available habitats (a set of six habitat classes), as estimated from 398 random sampling locations. Emperor Geese strongly selected Saline Ponds, Mudflat, and Ramenskii Meadow habitats and avoided Levee Meadow, Bog Meadow, and Sedge Meadow. These selected habitats werethe most saline, comprised one-third of the study area, and 45% of all locations were in Ramenskii meadow. I contrasted these Emperor Goose locationswith habitats used by the composite goose community, as inferred from the presence of goose feces at random locations. The marked difference between groups in this comparison implied that Cackling Canada Geese (Branta canadensis minima) and Greater White-fronted Geese (Anser albifrons) collectivelyselected much different brood rearing habitats than Emperor Geese.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 14:35:40