Duration of Fertility in Capercaillie Hens after Separation from Males

Parker, Howard; Mjelstad, Hermund; Solheim, Johan Trygve

doi:10.2307/3676496

Cited by 9 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, black grouse females seem to be exceptional in that they can respond to the actual sperm transfer, and indeed it would be extremely hazardous to rely on single copulations if that was not the case. It is known from experiments with the closely related Capercaillie Tetrao urogallus , that the sperm remains fertile long enough to fertilize even the last eggs that will be laid more than 2 weeks after the insemination (Parker et al . 1989).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Restrictive mating by females on black grouse leks

et al. 2007

View full text Add to dashboard Cite

In bird species with pair bonds, extra-pair matings could allow females to choose genetically superior males. This is not needed in lekking species because female choice is not constrained by pairing opportunities. However, polyandry has been reported in most lekking species studied so far. Using 12 microsatellite loci, we determined the paternity of 135 broods of black grouse sampled between 2001 and 2005 (970 hatchlings and 811 adult birds genotyped). The paternity assignments were combined to lek observations to investigate the mating behaviour of black grouse females. About 10% of the matings seemed to take place with males displaying solitarily. Forty per cent of the copulations between males displaying on the studied leks and radio-tagged females were not recorded. This was due to difficulties in identifying the females and because our observations did not cover all the possible time for matings. However, females of the undetected copulations had chosen males that were already known to be successful on the leks. There was a strong consistency between the observations and true paternity, even when the copulation was disturbed by a neighbouring male. Multiple mating and multiple paternities were rare. We can now confidently ascertain that most females mate only once with one male for the whole clutch. This mating behaviour requires that a single insemination is sufficient to fertilize a clutch and that females can determine whether the sperm has been successfully transferred. Grouse Tetraoninae with many lekking species may be the only bird taxon that has evolved these traits.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Either the females mated again with the same male (Rintamäki et al 1995) or the sperm of the first copulation could still fertilize the eggs (e.g. Parker et al 1989;.…”

Section: Discussionmentioning

confidence: 99%

Restrictive mating by females on black grouse leks

et al. 2007

View full text Add to dashboard Cite

show abstract

“…The mean duration of a fertile mating was only 5.6 days. The duration of fertility in capercaillie female has earlier been found to average 24 days (P arker et al 1989).…”

Section: Discussionmentioning

confidence: 98%

Capercaillie ‐ chicken hybrids

Skjervold

Mjelstad

1992

J Animal Breeding Genetics

View full text Add to dashboard Cite

Summary Crosses were made by means of artificial insemination using semen from capercaillie (Tetrao urogallus) on chicken (Gallus domesticus). Semen samples were collected from 22 birds and within a few minutes inseminated into a group of 25 meat ‐type virgin pullets. Each pullet was inseminated about once a week, always with semen from a new male. A total of 1418 eggs were incubated, of which only 8 eggs showed embryonic development. Out of these, three eggs hatched at the 24th day of incubation. The eight cases of embryonic development, all originated from five inseminatios from a total of 136. Four of these inseminations and seven of the eight embryos, all originated from only one of the 22 capercaillie males used for inseminations. Male no. 7 is the sire of the three vigorous hybrids. The results of this trial support the hypothesis that an incompatibility exists between the oviduct of domestic fowl and foreign sperm. Similarly the confinement of successful fertilization to only five groups of full sibs and the fact that seven out of eight embryos were sired by one male suggests a genetic component.

show abstract

“…Presumably, therefore, the contents of Ca and other elements in the eggs laid in the acclimation aviaries were not affected by their diet in captivity. Moreover, contact between the wild-caught hens with males (copulation) took place only in Sweden; Capercaillie hens remain fertile for up to 29 days after separation from males [11] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Supporting dataset and methods for egg sizes, eggshell thicknesses and metal concentrations measured in the shells and contents of eggs of Capercaillies Tetrao urogallus

et al. 2019

View full text Add to dashboard Cite

The dataset presented in this data paper supports “Eggshell resorption, and embryonic mobilization and accumulation of calcium and metals in eggs of wild and captive Capercaillies Tetrao urogallus ” (Orłowski et al., 2019) [1]. Here we present the supplementary data on the following: (1) egg sizes, regional eggshell thicknesses (at the equator, sharp pole and blunt pole) as well as the concentrations of two major micronutrients (Ca and Mg) and eight trace elements (Cr, Cu, Mn, Fe, Co, Cd, Pb and Zn), measured in the shells and contents of eggs of captive-bred and wild Capercaillies. (2) How the proportions of elements sequestered into eggshells become depleted during embryogenesis expressed as the %change of concentrations of various elements measured in the shells and contents of eggs at different stages of embryonic advancement (early dead embryos, late dead embryos and hatched eggs). (3) The relationships between the age of dead embryos and three regional eggshell thicknesses and concentrations of different elements measured in the shells and contents of these eggs.

show abstract

Duration of Fertility in Capercaillie Hens after Separation from Males

Cited by 9 publications

References 12 publications

Restrictive mating by females on black grouse leks

Restrictive mating by females on black grouse leks

Capercaillie ‐ chicken hybrids

Supporting dataset and methods for egg sizes, eggshell thicknesses and metal concentrations measured in the shells and contents of eggs of Capercaillies Tetrao urogallus

Contact Info

Product

Resources

About