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Titolo:
Human-imprinted northern bobwhite chicks and indexing arthropod foods in habitat patches
Autore:
Palmer, WE; Lane, MW; Bromley, PT;
Indirizzi:
Tall Timbers Res Stn, Tallahassee, FL 32312 USA Tall Timbers Res Stn Tallahassee FL USA 32312 , Tallahassee, FL 32312 USA N Carolina State Univ, Dept Zool, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 pt Zool, Raleigh, NC 27695 USA
Titolo Testata:
JOURNAL OF WILDLIFE MANAGEMENT
fascicolo: 4, volume: 65, anno: 2001,
pagine: 861 - 870
SICI:
0022-541X(200110)65:4<861:HNBCAI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
AGRICULTURAL FIELDS; PARTRIDGE CHICKS; FEEDING ECOLOGY; ARABLE FARMLAND; PHEASANT CHICKS; BIRD USE; SURVIVAL; TILLAGE; KANSAS;
Keywords:
agriculture; arthropod; Colinus virginianus; corn; feeding; habitat; northern bobwhite; soybean;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Palmer, WE Tall Timbers Res Stn, 13093 Henry Beadel Dr, Tallahassee, FL 32312 USA Tall Timbers Res Stn 13093 Henry Beadel Dr Tallahassee FL USA 32312
Citazione:
W.E. Palmer et al., "Human-imprinted northern bobwhite chicks and indexing arthropod foods in habitat patches", J WILDL MAN, 65(4), 2001, pp. 861-870

Abstract

Arthropods are an important diet resource for northern bobwhite (Colinus virginianus) chicks. Estimates, of arthropod abundance using standard entomological sampling techniques may lack biological relevance for assessing potential foraging value of habitat patches because they do not incorporate a realistic availability measure of arthropods to bobwhite chicks. Assuming that human-imprinted (hereafter, imprinted) bobwhite chicks foraged similarly to wild bobwhite chicks, we estimated foraging rates (arthropods [g] consumed/30 min/chick) and mass (g) changes of imprinted chicks foraging in different habitat patches, and used these measures to index arthropod abundance. Ranks of arthropod abundance in soybean fields (n=8) based on foraging rates of imprinted chicks were different from ranks based on arthropod counts from sweepnet sampling. Ranks of arthropod abundance in soybean fields (n=10) based on mass changes of imprinted chicks were different from ranks based on dry mass (g) of arthropods collected by sweepnetting and pitfall trapping. However, ranks of habitat patches based on foraging rates and mass changes of imprinted chicks were similar. Estimated sample sizes for comparing chick foraging rates of 2 agricultural habitats, with power (1-beta) = 0.8 and alpha = 0.05, were reasonable (n less than or equal to 11) at observed levels of sampling error. Foraging rates of imprinted chicks in randomlyselected, conventionally tilled soybean and corn fields were low (range 0.09-0.12 g/30 min/chick), but foraging rates were 2.1 and 3.8 times greater along Field edges and in no-tilled fields, respectively. Our results suggest that using estimates of arthropod abundance to rank the foraging value ofhabitats may be unreliable without information on availability of arthropods to chicks. Indices of the foraging value of habitat patches based on imprinted bobwhite chicks were more biologically relevant than arthropod abundance information.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/06/20 alle ore 09:27:37