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W opracowaniu przedstawiono historię i sposób wytworzenia przez pracowników Katedry Hodowli Małych Przeżuwaczy i Doradztwa Rolniczego Uniwersytetu Przyrodniczego w Lublinie owiec linii syntetycznych BCP i SCP. Ponadto opisano rolę tych zwierząt w produkcji owczarskiej i doświadczalnictwie. Całościowa analiza efektów pracy hodowlanej nad analizowanymi populacjami oraz wyniki prac naukowych, w których...
Celem pracy była ocena wzrostu jagniąt dwóch syntetycznych plenno-mięsnych linii owiec – BCP i SCP, po około 10-letnim okresie prowadzenia pracy hodowlanej. Obserwacje prowadzono w owczarni Stacji Dydaktyczno-Badawczej Małych Przeżuwaczy w Bezku, należącej do Uniwersytetu Przyrodniczego w Lublinie. Łącznie obserwacjami objęto 1151 jagniąt w okresie czterech kolejnych lat. Kontrolowano wzrost jagniąt,...
The aim of this study was to investigate the presence of proviral DNA and colostral antibodies in lambs born to and fed by ewes infected with small ruminant lentiviruses (SRLV). It was demonstrated that all 20 lambs tested 24 h after colostrum ingestion were serologically positive with high antibody titres. These gradually decreased with time, and at week 12 all lambs were seronegative. Twenty percent...
The study included a sheep flock comprising five genetic groups. The ELISA was applied to perform constant monitoring (every six months) for the infection of ewes with small ruminant lentivirus (SRLV). The research results demonstrated a negative effect of SRLVs infection on lamb rearing that, depending on the genetic group, proved to be lower 1.3%-1.4% compared to the seronegative mothers. At relatively...
The objective of the present research was the analysis of chosen factors contributing to mortality of ewes and their lambs from a flock naturally infected with maedi-visna virus (MVV). 1,406 mother sheep and their 2,234 progeny of two synthetic prolific- meat lines BCP and SCP and Suffolk breed were investigated. Summing up the research results concerning mortality of dams and lambs in a MVV-infected...
Selected haematological and biochemical parameters in blood of lambs born to maedi-visna virus (MVV) seropositive and seronegative ewes were investigated. The study included 116 lambs born to ewes with MVV antibodies and 111 lambs born from seronegative mothers. The presence of antibodies was determined by ELISA. Blood samples were taken prior to weaning and post-weaning at 18-23 and 80-88 d of age,...
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