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Titolo:
Pair copulation frequency correlates with female reproductive performance in Tree Sparrows Passer montanus
Autore:
Heeb, P;
Indirizzi:
Univ Bern, Dept Zool, CH-3032 Hinterkappelen, Switzerland Univ Bern Hinterkappelen Switzerland CH-3032 Hinterkappelen, Switzerland
Titolo Testata:
JOURNAL OF AVIAN BIOLOGY
fascicolo: 2, volume: 32, anno: 2001,
pagine: 120 - 126
SICI:
0908-8857(200106)32:2<120:PCFCWF>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPERM COMPETITION; HOUSE SPARROW; CLUTCH SIZE; BLUE TIT; PATERNITY; HYPOTHESIS; MALES; BIRDS; DOMESTICUS; QUALITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Heeb, P Univ Lausanne, Inst Ecol, Batiment Biol, CH-1015 Lausanne, Switzerland Univ Lausanne Batiment Biol Lausanne Switzerland CH-1015 tzerland
Citazione:
P. Heeb, "Pair copulation frequency correlates with female reproductive performance in Tree Sparrows Passer montanus", J AVIAN BIO, 32(2), 2001, pp. 120-126

Abstract

In socially monogamous birds, males benefit from frequent copulations withtheir partner if this increases their paternity in the brood. By soliciting and accepting copulation attempts, female birds can control pair copulation frequencies. Engaging in copulations can be costly by taking up time andby increasing the risks of predation and pathogen transmission. Current hypotheses propose that high pair-copulation frequencies may compensate for these costs by providing females with direct benefits that can result in higher reproductive success. In this study, I examine in a Tree Sparrow population the prediction that high pair-copulation frequencies are associated with better female reproductive performance. The results show that clutch sizes laid were positively correlated with the pair-copulation frequency. The length of the incubation period was negatively correlated and, as expected,the number of fledglings was positively correlated with pair-copulation frequency. The results are consistent with current hypotheses for the evolution of frequent pair copulations and provide one of the few evidences for a positive relation between pair-copulation frequency and female reproductiveperformance. This study also suggests that within-pair copulation frequency could be an early expression of the pairs' reproductive ability and mightsignal their phenotypic quality.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:08:41