Pozycja Open AccessAnalysis and Comparison of Meat Performance Parameters in Polish and French Limousine Bulls(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2022) Wiśniewski, Konrad; Kuczyńska, Beata; Przysucha, Tomasz; Department of Animal Breeding, Warsaw University of Life Sciences, Poland. 2. Polish Association of Breeders and Producers of Beef Cattle, Warsaw, Poland; Department of Animal Breeding, Warsaw University of Life Sciences, Poland; Department of Animal Breeding, Warsaw University of Life Sciences, PolandThe study covered bulls of the Limousine meat breed, whose parents were of Polish and French origin, kept on farms in Poland. This study aimed to assess whether individuals of Polish origin cover their genetic potential compared to bulls of French origin. These studies were carried out under the program of the Ministry of Science and Higher Education "Implementation Doctorate" DWD3 / 53/2019 in cooperation with the Polish Association of Beef Cattle Breeders and Producers in 2019-2022. The research material consisted of 925 bulls, 447 by French father and 478 by Polish father. Among breeders of Polish origin, special attention was paid to the fact that parents of French origin did not appear in the pedigrees in the previous two generations. The following factors were taken into account in the comparative analysis: the country of origin of the bull's father, the country of origin of the bull's mother, body weight after calving (kg), body weight at 210 and 420 days of life (kg) and gains (g) in this period, standardized weight in 210 and 420 days (kg), as well as the height at withers (cm), chest circumference (cm), ultrasound measurement of the longest back muscle (cm3), muscle index, development index, collective evaluation index, calibre, muscle and bone share, functional features and state. The individual calendar months were taken into account as the calving period. Statistical analysis was performed by multivariate ANOVA using SPSS.23 software. A significant influence of the father's origin on the vital parameters of bulls was shown. After the birth of a Polish father, the mean body weight of bulls was 39.08 kg and was lower by 0.95 kg (p ≥ 0.01) than males of French origin. Bodyweight, daily gains, standardized body weight in the 210th and 420th day of life, height at the withers, chest circumference, ultrasound measurement of the longest back muscle, meatiness index, development index, and aggregate evaluation index spoke in favour of bulls of French origin. However, there were no significant differences in maternal origin, size, muscle and bone proportion, functional components, and condition. Pozycja Open AccessProposal of the Monitoring Methodology of the Viviparous Lizard Zootoca vivipara(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2022) Stasiak, Aleksandra Katarzyna; Faculty of Animal Breeding, Bioengineering and Conservation, Warsaw University of Life Sciences – SGGW, Warszawa, PolandThe viviparous lizard (Zootoca vivipara) is a species of the Squamata order from the family of lizards (Lacertidae) covering the wide range – from Western Europe, including British islands and Ireland to the far reaches of Asia with limit of occurrence on the Japanese island of Hokkaido. The population of the viviparous lizard is not regularly monitored and does not have specific monitoring rules. Currently, numerous publications in the press and media inform about the progressive intensification of agriculture, intensity of tourist traffic or the increasingly progressive urbanization of the environment, which contributes to the migration of viviparous lizards from these areas. It has been suggested that because of human interference with the environment, viviparous lizards retreat to intact natural habitats. This is related to decrease in the area of occurrence of these reptiles and less frequent observations than before. The work presents a proposed methodology of viviparous lizard monitoring based on the evaluation of population status indicator – relative abundance and habitat condition indicators such as availability of breeding places and availability of hiding places. The aim of the article is to present indicators of the population status and habitat condition indicators, additionally to establish terms and frequency of surveys within the framework of the possibility to conduct monitoring studies of viviparous lizard populations. Pozycja Open AccessCharacteristics of Reproduction Traits in Cows with Record Lifetime Milk Yields(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2022) Pytlewski, Jarosław; Antkowiak, Ireneusz R.; Czerniawska-Piątkowska, Ewa; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Poznań, Poland; Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Poznań, Poland; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, PolandThe aim of this study was to characterise basic reproduction indexes and to investigate the effect of selected factors on values of analysed fertility parameters in cows (100 head) with record lifetime milk yields. The experiments were conducted on Polish Holstein-Friesian Black- -and-White cattle. Cows with lifetime milk yields of min. 100 thousand kg milk were considered record holders. Animals were selected at random from herds covered by performance testing in the Poznań testing region in the years 2003–2016. It was shown that analysed cows with record lifetime milk yields exhibited slightly reduced fertility. The animals had the preferred mean age at first calving and adequate average length of pregnancy. Relatively high numbers of semen doses required for successful insemination resulted in an extended length of calving interval, interpregnancy period and artificial mating service.In the management of dairy cow herds focusing on high lifetime productivity and fertility traits it is recommended to control reproduction so that calvings take place in winter and cows calve for the first time at the age of maximum 27 months.