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Titolo:
Daily activity budgets and population size of American White Pelicans wintering in south Louisiana and the delta region of Mississippi
Autore:
King, DT; Werner, SJ;
Indirizzi:
Mississippi State Univ, USDA, APHIS, WS,Natl Wildlife Res Ctr, MississippiState, MS 39762 USA Mississippi State Univ Mississippi State MS USA 39762 State, MS 39762 USA
Titolo Testata:
WATERBIRDS
fascicolo: 2, volume: 24, anno: 2001,
pagine: 250 - 254
SICI:
1524-4695(200108)24:2<250:DABAPS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Keywords:
activity budgets; American White Pelican; aquaculture; census; foraging; Louisiana; Mississippi; telemetry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: King, DT Mississippi State Univ, USDA, APHIS, WS,Natl Wildlife Res Ctr, PODrawer 6099, Mississippi State, MS 39762 USA Mississippi State Univ PO Drawer 6099 Mississippi State MS USA 39762
Citazione:
D.T. King e S.J. Werner, "Daily activity budgets and population size of American White Pelicans wintering in south Louisiana and the delta region of Mississippi", WATERBIRDS, 24(2), 2001, pp. 250-254

Abstract

Twenty-one American White Pelicans (Pelecanus erythrorhynchos) were captured and fitted with radiotransmitters in south Louisiana and the delta region of Mississippi during the winter and early spring of 1994-1997. The pelicans were monitored to determine their daily activity budgets while using different habitats such as catfish ponds, crawfish ponds, rivers. lakes, and bayous. Pelicans foraging at catfish ponds spent about 4% of their day foraging and 96% loafing, while pelicans foraging in other habitats spent about28% of their day foraging and 72% loafing. Fur all individual bird, the mean number of foraging sessions per day was 2.5 (+/-0.53 SE) and the mean length of each foraging session was 66.7 min. (+/-8.08 SE). Aerial censuses were also conducted to determine the numbers of pelicans in the delta regionof Mississippi. Each rear the numbers of pelicans wintering in the delta region of Mississippi peaked in February and March, corresponding with spring migration. Pelican numbers reached approximately 4,600 during February and March 1996. Pelicans were observed foraging in larger flocks for shorter periods of time on catfish ponds than in other habitats.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 01:48:46