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Titolo:
EVOLUTIONARY CONSEQUENCES OF NONRANDOM MATING - DO LARGE MALES INCREASE OFFSPRING FITNESS IN THE ANURAN BUFO-BUFO
Autore:
SEMLITSCH RD;
Indirizzi:
UNIV MISSOURI,DIV BIOL SCI COLUMBIA MO 65211 UNIV ZURICH,INST ZOOL CH-8057 ZURICH SWITZERLAND
Titolo Testata:
Behavioral ecology and sociobiology
fascicolo: 1, volume: 34, anno: 1994,
pagine: 19 - 24
SICI:
0340-5443(1994)34:1<19:ECONM->2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIFE-HISTORY TRAITS; MALE COMMON TOADS; SEXUAL SELECTION; DROSOPHILA-MELANOGASTER; PSEUDACRIS-TRISERIATA; RANA-SYLVATICA; HYLA-CRUCIFER; WOOD FROG; BODY SIZE; SUCCESS;
Keywords:
BODY SIZE; FITNESS; GOOD GENES; SELECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
47
Recensione:
Indirizzi per estratti:
Citazione:
R.D. Semlitsch, "EVOLUTIONARY CONSEQUENCES OF NONRANDOM MATING - DO LARGE MALES INCREASE OFFSPRING FITNESS IN THE ANURAN BUFO-BUFO", Behavioral ecology and sociobiology, 34(1), 1994, pp. 19-24

Abstract

The purpose of my study was to determine whether male body size, a trait known to be important to mating success, covaries with offspring performance. I tested the effects of male body size on the performance of Bufo bufo tadpoles reared at two food levels by mating large, small, and naturally-mated males to the same females. Survival of tadpoles in the high-food environment was affected by male size class, but in the opposite way to that expected. Tadpoles sired by large males had the lowest survival, and those sired by small males the highest. Neitherbody size at metamorphosis nor larval period were affected by male size class alone, but male size interacted with the female contribution:tadpoles sired by large males had short larval periods and large sizeat metamorphosis with some females,but long larval periods and small body sizes with others. Food level had a significant effect on both size at metamorphosis and larval period, and interacted with female contribution, but not male size class. This indicated that female contribution to tadpoles was dependent on food level, but that the effects of male size were not differentially expressed by tadpoles at the two food levels. My results indicate that traits with a direct effect on offspring fitness are not enhanced by large male body size, yet some malesand females produced offspring with significantly better performance. I suggest that evolutionary change in this mating system is unlikely to occur through the non-random mating of males based on body size alone.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 12:16:12