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Titolo:
Remating, sperm transfer, and sperm displacement in the cactophilic species Drosophila buzzatii Patterson & Wheeler (Diptera : Drosophilidae)
Autore:
Bundgaard, J; Barker, JSF;
Indirizzi:
Univ New England, Div Anim Sci, Armidale, NSW 2351, Australia Univ New England Armidale NSW Australia 2351 rmidale, NSW 2351, Australia Aarhus Univ, Dept Ecol & Genet, DK-8000 Aarhus C, Denmark Aarhus Univ Aarhus Denmark C ept Ecol & Genet, DK-8000 Aarhus C, Denmark
Titolo Testata:
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
fascicolo: 1, volume: 71, anno: 2000,
pagine: 145 - 164
SICI:
0024-4066(200009)71:1<145:RSTASD>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOLUTIONARY HISTORY; MULTIPLE INSEMINATION; POPULATION PREDICTION; MELANOGASTER FEMALES; NATURAL-POPULATION; FITNESS COMPONENTS; GIANT SPERM; COMPETITION; GENETICS; MALES;
Keywords:
remating frequency; copulation duration; sperm partitioning; sperm allocation; sterile matings; fecundity; sperm size; sperm displacement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Bundgaard, J Univ New England, Div Anim Sci, Armidale, NSW 2351, AustraliaUniv New England Armidale NSW Australia 2351 2351, Australia
Citazione:
J. Bundgaard e J.S.F. Barker, "Remating, sperm transfer, and sperm displacement in the cactophilic species Drosophila buzzatii Patterson & Wheeler (Diptera : Drosophilidae)", BIOL J LINN, 71(1), 2000, pp. 145-164

Abstract

The mating system of Drosophila buzzatii is characterized by short copulation duration, frequent remating in both males and females, and male ejaculate partitioning. Additional features of the system are strong sperm displacement and a high frequency of sterile matings. Remating frequencies and theeffects of remating on various mating parameters were studied. In order tocharacterize variation, five isofemale lines from geographically distant localities in Australia (three localities), Brazil and the Canary Islands were used. Mating parameters studied were: premating time, copulation duration, interval between successive matings, and progeny number as a measure of sperm transfer. Variation for sperm displacement was studied in crosses between laboratory stocks and a number of isofemale lines from Australia. There were significant between-line differences in female remating frequencies,premating time, copulation duration, interval between successive matings, and progeny numbers, indicating genetic Variation for these traits. Femalesfrom the five lines mated on average 1.6 to 3.1 times in 4 h, with a maximum of eight matings for one female. The males were given a maximum of ten virgin females in sequence and more than one-third of the males mated all ten females in the 2h observation period. Copulation duration decreased and interval between matings increased with copulation number in multiply mated males. Mean copulation duration was c. 2 min. Sperm transfer, measured as the average number of progeny from a single mating, was low (c.25) and multiply mated females gave more progeny than single mated females, although with much lower progeny numbers than observed in wild-caught non-virgin females. A surprisingly high proportion of observed matings gave no progeny, i.e.they were sterile matings. Sperm displacement was strong in most crosses and remained strong in multiply mated females. The results are discussed in relation to the evolution of mating patterns in Drosophila. (C) 2000 The Linnean Society of London.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 07:56:18