Abstract
Swine breeding production as one of the most perspective branch in livestock farming require particular attention when it is about reproduction of the flock. Final goal of every swine breeding farm is of course to increase reproduction of the animals and ensure healthy progeny. Aim of our research was to on the basis of detailed microscopic analyze of the ovaries in researched periods and results obtained accelerate reproduction in swine breeding production and by that total flock craft. We have culled 36 sows cross breed of Swedish Landrace and Large White whose are breaded in farm conditions in the periods of estrous and post partum. Immediately after culling we have separated ovaries from surrounding tissue and using micrometer we have measured length and width of evident follicles. Obtained results showed that the most ideal period for next mating of sows is 21 to 28 days post partum, when the biggest values of examined parameters had been recorded - length and width of follicles, what indicate to increase of ovarial activity.
Highlights
Introduction and literature overviewOrganisation of reproduction in every farm, and especially in pig farming is one of the most important processes
We have performed our research on 36 guilts cross breed of SL x LW whose are breeded at pig farm Drniš, R Croatia, in early puerpery and estrous, whose are kept in equal zoohygienic conditions and fed with mixture for lactation sows
Animals are culled from day 1 to day 28 post partum and in estrous, we separated them in 6 groups for more clear monitoring of possible changes in ovaries in: days 1-3 post partum, days 5-7 post partum, days 10-13 post partum, days 16-19 post partum, days 21-28 post partum, and in estrous
Summary
Introduction and literature overviewOrganisation of reproduction in every farm, and especially in pig farming is one of the most important processes. In order to process of reproductive flock utilisation be more succesful, one of the conditions is properly selection of male and female reproductive materials, as well as satisfying percent of pregnant animals, which again is dependant of variety aught outside so as inside factors as accenuate Heard (1976) and Schmiedt (1967). Age when sexual maturation of females appear is between 6 and 8 months, and first labor is expected with age of one year as accenuate Adilović at al. In our research we have tried to enlighten problematic of pig reproduction namely cross bred of Swedish Landrace and Large White (SL x LW), following ovarial cycle, respectively some histological parameters, number of mature folicules, their dimensions in period of estrous and early puerpery
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