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Titolo:
Seed preferences by birds: effects of the design of feeding-preference experiments
Autore:
Cueto, VR; Marone, L; de Casenave, JL;
Indirizzi:
Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, Buenos Aires, DF, Argentina Univ Buenos Aires Buenos Aires DF Argentina Buenos Aires, DF, Argentina IADIZA Inst, Desert Community Ecol Res Team, RA-5500 Mendoza, Argentina IADIZA Inst Mendoza Argentina RA-5500 s Team, RA-5500 Mendoza, Argentina
Titolo Testata:
JOURNAL OF AVIAN BIOLOGY
fascicolo: 3, volume: 32, anno: 2001,
pagine: 275 - 278
SICI:
0908-8857(200109)32:3<275:SPBBEO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
CENTRAL MONTE DESERT; CHOICE; ARGENTINA; RESERVES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Cueto, VR Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, Pabellon 2,Piso 4,Ciudad Univ, Buenos Aires, DF, Argentina Univ Buenos Aires Pabellon 2,Piso 4,Ciudad Univ Buenos Aires DF Argentina
Citazione:
V.R. Cueto et al., "Seed preferences by birds: effects of the design of feeding-preference experiments", J AVIAN BIO, 32(3), 2001, pp. 275-278

Abstract

We analysed the effects of the design of feeding-preference experiments ina study of seed selection by Rufous-collared Sparrows Zonotrichia capensis. We presented eight seed options in multiple- and simple-offer experiments. Statistical results indicated that in multiple-offer tests there were three preferred, and two avoided seed species. The other three species could not be assigned to any of those groups. In contrast, results of simple-offertests showed that all seed species were preferred, except the two avoided ones. Using a graphical combination of the results of both approaches, we obtained an easily interpretable assessment of the seed preferences of Rufous-collared Sparrows. In the graph space, seed species make up three groups:preferred, avoided, and less-preferred (i.e., heavily consumed in simple-offer trials, but avoided or consumed to a lesser extent in multiple-offer trials). With the combination of both protocols we avoided the biases causedby using one experimental design alone and could detect secondary-preferred food items. This seems crucial when the bird under study is plastic in its feeding preferences.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/04/20 alle ore 03:51:47