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Titolo:
Tactic-specific success in sperm competition
Autore:
Fu, P; Neff, BD; Gross, MR;
Indirizzi:
Univ Toronto, Dept Zool, Toronto, ON M5R 1G6, Canada Univ Toronto TorontoON Canada M5R 1G6 Zool, Toronto, ON M5R 1G6, Canada Cornell Univ, Dept Neurobiol & Behav, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 Neurobiol & Behav, Ithaca, NY 14853 USA
Titolo Testata:
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
fascicolo: 1472, volume: 268, anno: 2001,
pagine: 1105 - 1112
SICI:
0962-8452(20010607)268:1472<1105:TSISC>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARENTAGE ANALYSIS; MATING STRATEGIES; BLUEGILL SUNFISH; GAMES; FISH;
Keywords:
sperm competition; alternative mating tactics; sneak guard model; paternity; bluegill;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Gross, MR Univ Toronto, Dept Zool, 25 Harbord St, Toronto, ON M5R 1G6, Canada Univ Toronto 25 Harbord St Toronto ON Canada M5R 1G6 1G6, Canada
Citazione:
P. Fu et al., "Tactic-specific success in sperm competition", P ROY SOC B, 268(1472), 2001, pp. 1105-1112

Abstract

Sperm competition is a major force in sexual selection, but its implications for mating-system and life-history evolution are only beginning to be understood. The well-known sneak-guard model predicts that sneaks will win insperm competition. We now provide empirical confirmation of this prediction. Bluegill sunfish (Lupomis macrochirus) have both sneak (cuckolder) and guard (parental) males. Guards make nests, court females amid provide solitary parental care for the embryos. Sneaks include small curkolders, which are termed 'sneakers: that dart in and out of nests in order to ejaculate between the spawning pair and larger cuckolders, which are termed 'satellites', that mimic females in order to ejaculate between the spawning pair. Usingfield behavioural data, genetic data and new mathematical models fur paternity analyses, we show; for the first time to the authors knowledge, that sneaks fertilize more eggs than guards during sperm competition. In addition, we show that sneakers are superior to satellites in sperm competition and, thus, that even among sneaks there are tactic-specific differences in competitive success.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 13:14:21