Storage of sperm in the uterovaginal junction and its incidence on the numbers of spermatozoa present in the perivitelline layer of hens' eggs

Brillard, Jean-Pierre; Antoine, Huguette

doi:10.1080/00071669008417294

Cited by 57 publications

(40 citation statements)

References 5 publications

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“…The basis for sperm choice in birds is unknown. A prime candidate is the nonrecombining region of the genome, such as the major histocompatibility complex, which may be expressed on the surface of spermatozoa (Martin-Villa et al Whatever the mechanism by which sperm choice might occur, the most likely location for it to take place is in the bird's vagina, before the sperm reach the sperm storage tubules, because only 1-2% of inseminated are stored in the tubules and most of these are also transported to the infundibulum where fertilization occurs (Brillard and Antoine 1990;Bakst et al 1994). Sperm choice has not been clearly demonstrated in birds but has been shown in some other taxa, and may be a widespread, if subtle, process to avoid genetic incompatibilities (Tregenza and Wedell 2000) and, in some species, to adjust offspring sex ratio (Calsbeek and Sinervo 2002).…”

Section: Discussionmentioning

confidence: 99%

Nontransitivity of Paternity in a Bird

et al. 2004

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Abstract. In many animals reproductive success is determined after insemination by the interaction of male and female processes. While sperm competition is reasonably well understood in some taxa, other processes, such as cryptic female choice and differential early embryo mortality resulting from genetic incompatibilities, are less well understood. The relative importance of these different factors contributing to reproductive success is difficult to assess. Here we control for male-mediated effects (which are often considerable and can mask more subtle processes) through the artificial insemination of known numbers of sperm in the domestic fowl to reveal that male reproductive success is nontransitive across females: the success of a particular male depends on the background against which his sperm compete for fertilization. Two potential processes could account for this effect: cryptic female choice (sperm choice) or differential early embryo mortality. Regardless of the mechanism, nontransitivity of male reproductive success has important evolutionary consequences, including the maintenance of variation in male fitness.

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Section: Discussionmentioning

confidence: 99%

Nontransitivity of Paternity in a Bird

et al. 2004

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“…The number of sperm trapped in the egg's perivitelline layer declines with successive eggs in a clutch, reflecting the decline in sperm numbers in the sperm-storage tubules (Wishart 1987, Brillard and Antoine 1990, Brillard and Bakst 1990. Thus, the log e of sperm number found in the perivitelline layer, regressed against time, produces a slope equal to the rate of passive sperm loss (u).…”

Section: Methodsmentioning

confidence: 99%

Passive Sperm Loss and Patterns of Sperm Precedence in Muscovy Ducks (Cairina moschata)

Stai

Searcy

2010

The Auk

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ABSTRACT.-We investigated the importance of passive sperm loss in the outcome of sperm competition in captive, wild-type Muscovy Ducks (Cairina moschata). In nature, Muscovy Ducks can be expected to experience more intense sperm competition than most other waterfowl because of their non-monogamous mating system. We estimated the instantaneous rate of sperm loss from the reproductive tracts of female Muscovy Ducks as 0.0235 + 0.0018 Ir 1 [SE], a fairly typical rate in comparison to the few other species of birds in which passive sperm loss has been measured. We also measured sperm precedence in trials in which a captive female was allowed to mate with two males in succession, with either a 24-h or a 72-h lag between matings. Paternity was determined with microsatellite markers. The mean proportion of a female's eggs fertilized by the second male (P 2 ) was 0.72 + 0.14 in trials with the 24-h lag and 0.42 + 0.13 in trials with the 72-h lag. The last-male precedence observed in the 24-h trials can be explained by a quantitative model in which passive sperm loss alone determines average success, but this model is not consistent with the outcome of the 72-h trials. Other factors, including perhaps postcopulatory female choice, must be acting in addition to passive sperm loss in the trials with the longer lag. Key words: Cairina moschata, Muscovy Ducks, passive sperm loss, sperm competition, sperm precedence, waterfowl. Perdida Pasiva de Esperma y Patrones de Precedencia Espermatica en Cairina moschataRESUMEN.-Investigamos la importancia de la perdida pasiva de esperma en el resultado de la competencia espermatica en patos cautivos de tipo silvestre de la especie Cairina moschata. En la naturaleza, se espera que los individuos de esta especie experimenten una competencia espermatica mas intensa que la mayoria de otros anseriformes debido a su sistema de apareamiento no monogamo. Estimamos la tasa instantanea de perdida de esperma del tracto reproductive de hembras de esta especie en 0.0235 + 0.0018 hr 1 [EE], un valor relativamente tipico en comparacion con las pocas especies de aves adicionales en las cuales se ha medido la perdida pasiva de esperma. Tambien medimos la precendecia espermatica en ensayos en los que a una hembra cautiva se le permito aparearse con dos machos consecutivamente, con un intervalo de 24 h o de 72 h entre apareamientos. La paternidad se determine mediante marcadores microsatelites. La media de la proporcion de los huevos de una hembra que fue fertilizada por el segundo macho (P 2 ) fue 0.72 + 0.14 en ensayos con intervalo de 24 h y 0.42 + 0.13 en ensayos con intervalo de 72 h. La precedencia del ultimo macho observada en los ensayos con intervalo de 24 h podria ser explicada por un modelo cuantitativo en el que la perdida pasiva de esperma por si sola determina el exito promedio, pero este modelo no concuerda con el resultado de los ensayos de 72 h. Otros factores aparte de la perdida pasiva de esperma, incluyendo quizas la seleccion postcopulatoria por parte de las hembras, deben estar act...

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“…As it is diflcult to demonstrate the presence of live (and motile) spermatozoa in the uterovaginal glands, the ability of the hens to store male gametes is usually assessed by measuring the duration of fertility (Lake r94 CANADIAN JOURNAL OF ANIMAL SCIENCE maximum duration (Dm) by Brillard and Antoine (1990). Taneja and Gowe (1962) reported significant strain differences in duration of fertility.…”

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confidence: 99%

“…Therefore, other traits related to the hen's ability to store spcrmatozoa which take embryonic mortality into account should be considered. Efficient duration is the number of days between insemination and the first unfertile egg (De: Brillard and Antoine (1990) REML. In G2, genetic parameters were estimated with REML using an animal model (Henderson 1987) which included the batch fixed eff'ect and the animals' genetic value random effects.…”

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confidence: 99%