Naslov
Management of breeding bulls of Busha cattle in Croatia - a bull:cow ratio trends

Autori
Menčik, Sven ; Piplica, Aneta ; Ostović, Mario ; Ekert Kabalin, Anamaria ; Sušić, Velimir ; Vlahek, Ivan ; Čačić, Mato ; Ivanković, Ante

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts 30th International Symposium Animal Science Days 2022 / Brajković, Vladimir ; Čubrik Ćurik, Vlatka ; Čurik, Ino ; Držaić, Ivana ; Shihabi, Mario - Zagreb : Agronomski fakultet Sveučilišta u Zagrebu, 2022, 39-39

ISBN
978-9538276-36-1

Skup
30th International Symposium Animal Science Days (ASD 2022)

Mjesto i datum
Zadar, Hrvatska, 21.09.2022. - 23.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Busha, bulls, management, reproduction

Sažetak
ABSTRACT: The Busha cattle breed contributes to a genetic diversity for centuries in Croatia, with the number of breeding cows significantly increasing in the last decades. Successful reproduction of native breeds in outdoor breeding conditions is a multifactorial phenomenon influenced by genetic and non-genetic factors. Improving fertility and conception in native outdoor breeding units with optimal bull:cow ratio is important to reduce costs of production and avoid negative effects of reproductive management in the herd. Herds of the Busha cattle across Croatia were included in the study to calculate the variability and trends in the bull:cow ratio among the herds. The data on 204 active breeding bulls born in the 2007-2020 period were obtained from the Veterinary Information System of the Ministry of Agriculture, Directorate for Veterinary Administration. Observed vs. expected frequencies were tested with Chi-sqaured test using the three model approach according to the expected number of bulls per cows in the herd ; model 1 as 1:10, model 2 as 1:15, and model 3 as 1:20. Analyzing the proportions of the expected bull:cow ratios significant differences were recorded for model 1 (herds with >31 cows, P<0.01), model 2 (herds with >61 cows, P<0.05) and model 3 (herds with >81 cows, P<0.01). Accordingly, a higher number of breeding males is expected in the herds. In this way, it is possible to improve reproductive performance, as well as genetic potential during the productive life, and share positive genes especially for herd fertility management for succesful breeding and genetic diversity of the Busha breed.

Izvorni jezik
Engleski

Znanstvena područja
Veterinarska medicina, Poljoprivreda (agronomija), Biotehnologija u biomedicini (prirodno područje, biomedicina i zdravstvo, biotehničko područje)

POVEZANOST RADA