[Eggs fertilizability in domestic hens Gallus gallus domesticus as a function of the yolk surface area].
The increase of egg mass and reliable decrease of egg fertilizability were observed when the mass surface area of yolk (egg) increased. The results obtained suggest that, in addition to the number of viable spermatozoa penetrating across the perivitelline membrane within 15-20 min after ovulation, the probability of fertilization depends on the area of egg surface, which approximately corresponds to the area of perivitelline membrane. Apparently, the ratio of receptors' numbers and spermatozoa, which contact with them on the germ disc surface, to their number on the rest part of perivitelline membrane decreases with the increase of yolk size. The decreased egg fertilizability concomitant with the increased area of perivitelline membrane suggests that the egg size is one of the factors of fertility of the female gametes as concerns both variability of the egg composition and age.
Fisinin
V I
VI
National Research and Technological Institute of Poultry Farming, Sergiev-Posad-11, ul. Ptitsegradskaya 10, Moscow Oblast', 141300 Russia.
Zhuravlev
I V
IV
Salamatin
A V
AV
D000818:Animals; D002645:Chickens / Q000254:growth & development*; D004530:Egg Yolk / Q000502:physiology; D005260:Female; D005298:Fertility / Q000502:physiology*; D008297:Male; D010063:Ovum / Q000254:growth & development / Q000502:physiology*; D013084:Sperm-Ovum Interactions / Q000502:physiology*; D014817:Vitelline Membrane / Q000254:growth & development / Q000502:physiology