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Titolo:
FACTORS AFFECTING MALE POTENCY IN POOLED GAMETE CROSSES OF RAINBOW-TROUT, ONCORHYNCHUS-MYKISS
Autore:
GILE SR; FERGUSON MM;
Indirizzi:
ONTARIO MINIST NAT RESOURCES,LAKE HURON MANAGEMENT UNIT,611 9TH AVE EOWEN SOUND ON N4K 3E4 CANADA UNIV GUELPH,DEPT ZOOL GUELPH ON N1G 2W1 CANADA
Titolo Testata:
Environmental biology of fishes
fascicolo: 3, volume: 42, anno: 1995,
pagine: 267 - 275
SICI:
0378-1909(1995)42:3<267:FAMPIP>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALMO-TRUTTA; SPERM; FERTILIZATION; POPULATIONS; METHODOLOGY; HATCHERY; MOTILITY; FISHES; MILT; EGGS;
Keywords:
SPERM COMPETITION; GAMETE INTERACTION; POOLED MATINGS; FISH; SALMONIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
S.R. Gile e M.M. Ferguson, "FACTORS AFFECTING MALE POTENCY IN POOLED GAMETE CROSSES OF RAINBOW-TROUT, ONCORHYNCHUS-MYKISS", Environmental biology of fishes, 42(3), 1995, pp. 267-275

Abstract

Numbers of offspring produced by genetically marked male and female rainbow trout, Oncorhynchns mykiss were determined by an electrophoretic analysis of 1713 progeny from crosses produced by premixing gametes from different parents prior to insemination and associated full- and half-sib controls. We examined whether male potency, defined as the ability of males to sire progeny when their semen is pooled with that ofother males, is affected by interaction with female gametes, concentration of sperm cells and the timing of semen application. Male potencydiffered significantly and was not affected by which of two females was involved in either of two sets of experiments. The differential between males decreased significantly when sperm concentrations were equalized. The first male sired over 75% of progeny when semen from four males was added sequentially to ova at 30 s intervals in each of two experiments. The lack of significant deviations of marker genotypes fromexpected Mendelian segregation in full-sib families suggested that there was no differential survival of progeny with specific marker genotypes. Furthermore, there was no correspondence between the survival ofprogeny of specific males in control crosses and the number of progeny sired in matings where sperm was premixed prior to insemination. Thus, variation in male reproductive success appeared the result of differential fertilization rates.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 18:35:48