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Titolo:
THE EFFECT OF REPEATED MATINGS ON SPERM NUMBERS IN SUCCESSIVE EJACULATES OF THE CABBAGE WHITE BUTTERFLY PIERIS-RAPAE (LEPIDOPTERA, PIERIDAE)
Autore:
WATANABE M; WIKLUND C; BONNO M;
Indirizzi:
MIE UNIV,FAC EDUC,DEPT BIOL TSU MIE 5148507 JAPAN
Titolo Testata:
Journal of insect behavior
fascicolo: 4, volume: 11, anno: 1998,
pagine: 559 - 570
SICI:
0892-7553(1998)11:4<559:TEORMO>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLODIA-INTERPUNCTELLA LEPIDOPTERA; APYRENE SPERM; FEMALE; EUPYRENE; SIZE; COMPETITION; STRATEGIES; PYRALIDAE; FREQUENCY; BUNDLES;
Keywords:
SPERMATOPHORES; EUPYRENE SPERM; APYRENE SPERM; MULTIPLE MATINGS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
M. Watanabe et al., "THE EFFECT OF REPEATED MATINGS ON SPERM NUMBERS IN SUCCESSIVE EJACULATES OF THE CABBAGE WHITE BUTTERFLY PIERIS-RAPAE (LEPIDOPTERA, PIERIDAE)", Journal of insect behavior, 11(4), 1998, pp. 559-570

Abstract

The effect of repeated matings on sperm numbers in successive ejaculates of the cabbage white butterfly, Pieris rapae, was examined. First ejaculates were larger than successive ones, which did not differ among themselves. Moreover, the cumulative mass of previous spermatophoreswas not correlated with that of the last mating. The number of eupyrene sperm bundles in the ejaculate did not differ between first and successive matings. Multiplying by 256 a male transfers about 11,000 eupyrene sperm at every mating. First ejaculates contained about 46,000 apyrene sperm, whereas successive ejaculates contained higher numbers. The sperm density increased after the first mating, though the spermatophore mass decreased. The significance of change in sperm quantity with mating number is discussed from the viewpoint of male investment.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 14:20:41