BEHAWIOR SEKSUALNY I MACIERZYŃSKI KÓZ MLECZNYCH NALEŻĄCYCH DO RÓŻNYCH GRUP WIEKOWYCH.

Sexual and maternal behaviour is a very important factor, which influence on reproduction success of an individual and also whole population. In goats breeding many different factors determine a sexual behaviour, between other also animal age and its status in herd. The aim of this study was analyzed goats behaviour in relation to they age. Analysis included 70 females distributed to three age groups and 2 males. In results of the study was that most of the mounts made a dominant male, but most of them were without ejaculation. Buck, who has a lower hierarchy position get fewer mating, but they are much more efficient. Also the time of the mating was different between these two males - dominant had a shorter one. Behaviour of females differences between groups. Primiparas were more fearful, shy and slower establish relations with the male. Older goats were more experiences and faster became pregnant. The statistical important differences were affirmed between number of mounts and they length. The differences between groups were also in gestation length - in primiparas group it last 150 days, but in third group older goats it take only 141 days. Primiparas have only one kid in litter, in two other groups was mainly a twin births. [ABSTRACT FROM AUTHOR]