TY  - JOUR
AU  - Nakov, Dimitar
AU  - Trajchev, Metodija
AU  - Hristov, Slavča
AU  - Stanković, Branislav
AU  - Cincović, Marko
AU  - Zlatanović, Zvonko
AU  - Bojkovski, Jovan
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6033
AB  - Male piglets are castrated primarily to avoid the unpleasant boar taint in meat, and additionally for the predisposition of castrates to accumulate fat and for their lower risk of developing unwanted behaviours. There are two main strategies available for withdrawing from surgical castration: one is immunocastration and the other is to raise entire male pigs or boars. Additionally, raising intact boars is more profitable because of the production of carcasses with lean meat and better feed conversion. Boars (compared to castrates) exhibit more aggressive, sexual, damaging social behaviour and reduced feeding behaviour with a lower prevalence of sickness behaviour as a result of good health and low susceptibility to chronic inflammation. In this review, the behaviours specific for boars as a result of sexual maturity are reviewed, with an overview of differences in the behaviour of surgically castrated barrows, immunocastrates and boars reared in group-housed systems. The raising of boars allows for good welfare of these animals in early life, but later, on reaching sexual maturity, the welfare of boars can be diminished because of their propensity to aggression and more mounting behaviour than castrates. Innovations in the breeding and management of boars are needed to improve their performance and to reduce welfare implications of these animals raised in social groups, and in particular to minimize deviant behaviours towards pen mates.
PB  - University of Belgrade, Faculty of Veterinary Medicine
T2  - Veterinarski Glasnik
T1  - Sexual maturity as risk for development of deviant behaviours in pig production systems with entire malesSexual maturity as risk for development of deviant behaviours in pig production systems with entire males
EP  - 131
IS  - 2
SP  - 112
VL  - 75
DO  - 10.2298/VETGL210727012N
ER  - 

@article{
author = "Nakov, Dimitar and Trajchev, Metodija and Hristov, Slavča and Stanković, Branislav and Cincović, Marko and Zlatanović, Zvonko and Bojkovski, Jovan",
year = "2022",
abstract = "Male piglets are castrated primarily to avoid the unpleasant boar taint in meat, and additionally for the predisposition of castrates to accumulate fat and for their lower risk of developing unwanted behaviours. There are two main strategies available for withdrawing from surgical castration: one is immunocastration and the other is to raise entire male pigs or boars. Additionally, raising intact boars is more profitable because of the production of carcasses with lean meat and better feed conversion. Boars (compared to castrates) exhibit more aggressive, sexual, damaging social behaviour and reduced feeding behaviour with a lower prevalence of sickness behaviour as a result of good health and low susceptibility to chronic inflammation. In this review, the behaviours specific for boars as a result of sexual maturity are reviewed, with an overview of differences in the behaviour of surgically castrated barrows, immunocastrates and boars reared in group-housed systems. The raising of boars allows for good welfare of these animals in early life, but later, on reaching sexual maturity, the welfare of boars can be diminished because of their propensity to aggression and more mounting behaviour than castrates. Innovations in the breeding and management of boars are needed to improve their performance and to reduce welfare implications of these animals raised in social groups, and in particular to minimize deviant behaviours towards pen mates.",
publisher = "University of Belgrade, Faculty of Veterinary Medicine",
journal = "Veterinarski Glasnik",
title = "Sexual maturity as risk for development of deviant behaviours in pig production systems with entire malesSexual maturity as risk for development of deviant behaviours in pig production systems with entire males",
pages = "131-112",
number = "2",
volume = "75",
doi = "10.2298/VETGL210727012N"
}

Nakov, D., Trajchev, M., Hristov, S., Stanković, B., Cincović, M., Zlatanović, Z.,& Bojkovski, J.. (2022). Sexual maturity as risk for development of deviant behaviours in pig production systems with entire malesSexual maturity as risk for development of deviant behaviours in pig production systems with entire males. in Veterinarski Glasnik
University of Belgrade, Faculty of Veterinary Medicine., 75(2), 112-131.
https://doi.org/10.2298/VETGL210727012N

Nakov D, Trajchev M, Hristov S, Stanković B, Cincović M, Zlatanović Z, Bojkovski J. Sexual maturity as risk for development of deviant behaviours in pig production systems with entire malesSexual maturity as risk for development of deviant behaviours in pig production systems with entire males. in Veterinarski Glasnik. 2022;75(2):112-131.
doi:10.2298/VETGL210727012N .

Nakov, Dimitar, Trajchev, Metodija, Hristov, Slavča, Stanković, Branislav, Cincović, Marko, Zlatanović, Zvonko, Bojkovski, Jovan, "Sexual maturity as risk for development of deviant behaviours in pig production systems with entire malesSexual maturity as risk for development of deviant behaviours in pig production systems with entire males" in Veterinarski Glasnik, 75, no. 2 (2022):112-131,
https://doi.org/10.2298/VETGL210727012N . .

TY  - JOUR
AU  - Nakov, Dimitar
AU  - Hristov, Slavča
AU  - Andonov, Sreten
AU  - Trajchev, Metodija
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3492
AB  - A cross-sectional longitudinal survey was carried out between February 2009 and January 2010 to evaluate udder-related risk factors for clinical mastitis occurring in dairy herds. Data were used from three dairy farms. Research was divided into four calendar seasons. Cows with clinical mastitis were detected by clinical examination of the udder and determination of abnormalities in milk. Udder level variables, conformation characteristics of udder and teats and teat end to floor distances were included in the logistic regression analysis. The estimated incidence risk for CM in the population of dairy cows observed was 85.02 cases per 100 cow-years at risk. The relative risk of CM was lower for primiparous cows, and increased with further parity. The median number of days in milk at diagnosis was 108 days, ranging from a median of 55 to 150 days in lactation. The rear udder quarters had a higher risk of CM incidence compared to the front udder quarters. A Chi square test revealed that farm management and cow parity were significantly connected with incidence of clinical mastitis. Spring was the season with the highest percentage of diagnosed cases of CM, with the exception of farm A, where Fall was the season with the highest percentage of cases. All udder level factors entered in the models were significantly linked with the occurrence of CM. The odds ratio of CM increased significantly as udder morphology worsened, teat ends were flat and the distance from teat ends to floor decreased. It was concluded that conformation udder traits could be used for the genetic selection of dairy cows for mastitis resistance.
PB  - University of Zagreb, Facultty of Veterinary Medicine
T2  - Veterinarski Arhiv
T1  - Udder-related risk factors for clinical mastitis in dairy cows
EP  - 127
IS  - 2
SP  - 111
VL  - 84
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_3492
ER  - 

@article{
author = "Nakov, Dimitar and Hristov, Slavča and Andonov, Sreten and Trajchev, Metodija",
year = "2014",
abstract = "A cross-sectional longitudinal survey was carried out between February 2009 and January 2010 to evaluate udder-related risk factors for clinical mastitis occurring in dairy herds. Data were used from three dairy farms. Research was divided into four calendar seasons. Cows with clinical mastitis were detected by clinical examination of the udder and determination of abnormalities in milk. Udder level variables, conformation characteristics of udder and teats and teat end to floor distances were included in the logistic regression analysis. The estimated incidence risk for CM in the population of dairy cows observed was 85.02 cases per 100 cow-years at risk. The relative risk of CM was lower for primiparous cows, and increased with further parity. The median number of days in milk at diagnosis was 108 days, ranging from a median of 55 to 150 days in lactation. The rear udder quarters had a higher risk of CM incidence compared to the front udder quarters. A Chi square test revealed that farm management and cow parity were significantly connected with incidence of clinical mastitis. Spring was the season with the highest percentage of diagnosed cases of CM, with the exception of farm A, where Fall was the season with the highest percentage of cases. All udder level factors entered in the models were significantly linked with the occurrence of CM. The odds ratio of CM increased significantly as udder morphology worsened, teat ends were flat and the distance from teat ends to floor decreased. It was concluded that conformation udder traits could be used for the genetic selection of dairy cows for mastitis resistance.",
publisher = "University of Zagreb, Facultty of Veterinary Medicine",
journal = "Veterinarski Arhiv",
title = "Udder-related risk factors for clinical mastitis in dairy cows",
pages = "127-111",
number = "2",
volume = "84",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_3492"
}

Nakov, D., Hristov, S., Andonov, S.,& Trajchev, M.. (2014). Udder-related risk factors for clinical mastitis in dairy cows. in Veterinarski Arhiv
University of Zagreb, Facultty of Veterinary Medicine., 84(2), 111-127.
https://hdl.handle.net/21.15107/rcub_agrospace_3492

Nakov D, Hristov S, Andonov S, Trajchev M. Udder-related risk factors for clinical mastitis in dairy cows. in Veterinarski Arhiv. 2014;84(2):111-127.
https://hdl.handle.net/21.15107/rcub_agrospace_3492 .

Nakov, Dimitar, Hristov, Slavča, Andonov, Sreten, Trajchev, Metodija, "Udder-related risk factors for clinical mastitis in dairy cows" in Veterinarski Arhiv, 84, no. 2 (2014):111-127,
https://hdl.handle.net/21.15107/rcub_agrospace_3492 .