TY  - JOUR
AU  - Maksimović, Nevena
AU  - Hristov, Slavča
AU  - Milovanović, Aleksandar
AU  - Barna, Tomislav
AU  - Stojanov, Igor
AU  - Cekić, Bogdan
AU  - Milošević-Stanković, Ivana
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6233
AB  - The drive to mate females is variable among the rams and can have a major impact on sheep production. Androgen testosterone may be a key mediator within the expression of various morphological and behavioural traits in mammals, but the factors un-derlying individual variation in circulating testosterone levels are poorly understood. The aim of this study was to investigate the development of sexual behaviour patterns in ram lambs as well as the role of testosterone in the expression of their libido. Research was carried out on the sheep farm of the Institute for Animal Husbandry, Belgrade, Serbia. The study included 20 crossbred ram lambs (autochthonous breed Pirot Pramenka x Merinolandschaf x Ile de France). All ram lambs used in the study were of same age and rearing conditions. They were weaned at 2 months of age and kept indoors from birth throughout the whole study. Animals were introduced in the study at the age of 3 months and the trial was completed at the rams’ age of 17 months. Blood samples for testosterone levels were taken bimonthly (at the age of 3, 5, 7, 9, 11, 13, 15 and 17 months), as well as were male-female and male-male interactions recorded. Male-female interactions included the following elements of behaviour: nosing (or anogenital sniffing), pawing, flehmen response, attempted mounts. Also, duration of all male activities directed towards ewe was recorded (male-female interactions in total). Male-male interactions involved the frequency of male-male mounts. Performed investigations showed that sexual behaviour of rams was age dependent, but poorly correlated to serum testosterone. The average serum testosterone levels ranged from 1.83-13.28 ng/mL, and were age dependant (P<0.05). Male-female oriented behaviour developed linearly with age, while male-male specific behaviour was characterized by high intensity in young age and then pronounced variability in later test periods. None of the studied behavioural interactions were high-ly correlated to serum testosterone. These findings support standpoint of more than one factor influencing development of sexual behaviour of ram lambs. © 2021, Massimo Morgante. All rights reserved.
T2  - Large Animal Review
T2  - Large Animal Review
T1  - Development of sexual behaviour in ram lambs and its correlation to serum testosterone
EP  - 34
IS  - 1
SP  - 31
VL  - 27
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_6233
ER  - 

@article{
author = "Maksimović, Nevena and Hristov, Slavča and Milovanović, Aleksandar and Barna, Tomislav and Stojanov, Igor and Cekić, Bogdan and Milošević-Stanković, Ivana",
year = "2021",
abstract = "The drive to mate females is variable among the rams and can have a major impact on sheep production. Androgen testosterone may be a key mediator within the expression of various morphological and behavioural traits in mammals, but the factors un-derlying individual variation in circulating testosterone levels are poorly understood. The aim of this study was to investigate the development of sexual behaviour patterns in ram lambs as well as the role of testosterone in the expression of their libido. Research was carried out on the sheep farm of the Institute for Animal Husbandry, Belgrade, Serbia. The study included 20 crossbred ram lambs (autochthonous breed Pirot Pramenka x Merinolandschaf x Ile de France). All ram lambs used in the study were of same age and rearing conditions. They were weaned at 2 months of age and kept indoors from birth throughout the whole study. Animals were introduced in the study at the age of 3 months and the trial was completed at the rams’ age of 17 months. Blood samples for testosterone levels were taken bimonthly (at the age of 3, 5, 7, 9, 11, 13, 15 and 17 months), as well as were male-female and male-male interactions recorded. Male-female interactions included the following elements of behaviour: nosing (or anogenital sniffing), pawing, flehmen response, attempted mounts. Also, duration of all male activities directed towards ewe was recorded (male-female interactions in total). Male-male interactions involved the frequency of male-male mounts. Performed investigations showed that sexual behaviour of rams was age dependent, but poorly correlated to serum testosterone. The average serum testosterone levels ranged from 1.83-13.28 ng/mL, and were age dependant (P<0.05). Male-female oriented behaviour developed linearly with age, while male-male specific behaviour was characterized by high intensity in young age and then pronounced variability in later test periods. None of the studied behavioural interactions were high-ly correlated to serum testosterone. These findings support standpoint of more than one factor influencing development of sexual behaviour of ram lambs. © 2021, Massimo Morgante. All rights reserved.",
journal = "Large Animal Review, Large Animal Review",
title = "Development of sexual behaviour in ram lambs and its correlation to serum testosterone",
pages = "34-31",
number = "1",
volume = "27",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_6233"
}

Maksimović, N., Hristov, S., Milovanović, A., Barna, T., Stojanov, I., Cekić, B.,& Milošević-Stanković, I.. (2021). Development of sexual behaviour in ram lambs and its correlation to serum testosterone. in Large Animal Review, 27(1), 31-34.
https://hdl.handle.net/21.15107/rcub_agrospace_6233

Maksimović N, Hristov S, Milovanović A, Barna T, Stojanov I, Cekić B, Milošević-Stanković I. Development of sexual behaviour in ram lambs and its correlation to serum testosterone. in Large Animal Review. 2021;27(1):31-34.
https://hdl.handle.net/21.15107/rcub_agrospace_6233 .

Maksimović, Nevena, Hristov, Slavča, Milovanović, Aleksandar, Barna, Tomislav, Stojanov, Igor, Cekić, Bogdan, Milošević-Stanković, Ivana, "Development of sexual behaviour in ram lambs and its correlation to serum testosterone" in Large Animal Review, 27, no. 1 (2021):31-34,
https://hdl.handle.net/21.15107/rcub_agrospace_6233 .

TY  - JOUR
AU  - Milošević-Stanković, I.
AU  - Hristov, Slavča
AU  - Maksimović, Nevena
AU  - Popović, Blaženka
AU  - Davidović, Vesna
AU  - Mekić, Cvijan
AU  - Dimitrijević, B.
AU  - Cincović, Marko R.
AU  - Stanković, Branislav
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5444
AB  - The investigation was performed on two groups of primiparous and multiparous healthy dewormed Alpine dairy goats (25 each) during peripartal period. Blood samples were collected (jugular venipuncture) 10-15 days before and 10-15 and 30 days after the parturition into BD SST-II Advance (3.5 mL) and BD NaF 3.0 mg Na2EDTA 6.0 mg (2 mL) vacutainers, cooled and centrifuged (1500 r/min, 15 minutes and ≤1300 r/min, 10 minutes, respectively). Glucose, non-esterified fatty acids (NEFA) and β-hydroxybutyrate (BHBA) concentrations in blood sera were determined using A15 automatic spectrophotometric analyzer (Biosystem, Spain). Simultaneously, body condition scoring (BCS) was performed by Villaquiran et al. (2007) method. The obtained data were analyzed by IBM SPSS statistics 21. The glucose concentration inclined to increase in both groups. Differences between glucose levels were significant (P<0.05) 15 days before and 15 days after, as well as 15 and 30 days after the parturition, and very significant (P<0.01) 15 days before and 30 days after the parturition. The BHBA blood levels significantly differed 15 days before and 30 days after and 15 and 30 days after the parturition (P<0.05). BHBA concentration peaked at week 2 postpartum, following the increase of NEFA, providing the substrate for BHBA synthesis. NEFA levels significantly (P<0.05) differed 15 days before and 15 days after the parturition. Goats’ BCS ranged from 2 to 4 and significantly depended on glucose (r=0.392; P<0.05) and BHBA (r=0.317; P<0.05) level 15 days before parturition. BCS 30 days postpartum very significantly depended on the glucose level (r=0.450; P<0.01), significantly higher than the concentration of BHBA (r=0.351; P<0.05) and NEFA concentration (r=-0.304; P<0.05). BCS 15 days before parturition did not depend on the NEFA concentration. Fifteen days after the parturition BCS did not statistically depend on the observed indicators. Obtained data suggest that knowledge of BCS and energy indicators levels may be very useful in research and practice in order to appreciate energy metabolism of pregnant and lactating dairy ruminants, particularly dairy goats. These data are poorly documented for goats, but they can reveal early pathological metabolic changes in transiting female goat organism, enabling successful prophylactic, as well as, therapeutic intervention.
PB  - Massimo Morgante
T2  - Large Animal Review
T1  - Energy metabolism indicators and body condition in peripartal period of alpine goats
EP  - 18
IS  - 1
SP  - 13
VL  - 26
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_5444
ER  - 

@article{
author = "Milošević-Stanković, I. and Hristov, Slavča and Maksimović, Nevena and Popović, Blaženka and Davidović, Vesna and Mekić, Cvijan and Dimitrijević, B. and Cincović, Marko R. and Stanković, Branislav",
year = "2020",
abstract = "The investigation was performed on two groups of primiparous and multiparous healthy dewormed Alpine dairy goats (25 each) during peripartal period. Blood samples were collected (jugular venipuncture) 10-15 days before and 10-15 and 30 days after the parturition into BD SST-II Advance (3.5 mL) and BD NaF 3.0 mg Na2EDTA 6.0 mg (2 mL) vacutainers, cooled and centrifuged (1500 r/min, 15 minutes and ≤1300 r/min, 10 minutes, respectively). Glucose, non-esterified fatty acids (NEFA) and β-hydroxybutyrate (BHBA) concentrations in blood sera were determined using A15 automatic spectrophotometric analyzer (Biosystem, Spain). Simultaneously, body condition scoring (BCS) was performed by Villaquiran et al. (2007) method. The obtained data were analyzed by IBM SPSS statistics 21. The glucose concentration inclined to increase in both groups. Differences between glucose levels were significant (P<0.05) 15 days before and 15 days after, as well as 15 and 30 days after the parturition, and very significant (P<0.01) 15 days before and 30 days after the parturition. The BHBA blood levels significantly differed 15 days before and 30 days after and 15 and 30 days after the parturition (P<0.05). BHBA concentration peaked at week 2 postpartum, following the increase of NEFA, providing the substrate for BHBA synthesis. NEFA levels significantly (P<0.05) differed 15 days before and 15 days after the parturition. Goats’ BCS ranged from 2 to 4 and significantly depended on glucose (r=0.392; P<0.05) and BHBA (r=0.317; P<0.05) level 15 days before parturition. BCS 30 days postpartum very significantly depended on the glucose level (r=0.450; P<0.01), significantly higher than the concentration of BHBA (r=0.351; P<0.05) and NEFA concentration (r=-0.304; P<0.05). BCS 15 days before parturition did not depend on the NEFA concentration. Fifteen days after the parturition BCS did not statistically depend on the observed indicators. Obtained data suggest that knowledge of BCS and energy indicators levels may be very useful in research and practice in order to appreciate energy metabolism of pregnant and lactating dairy ruminants, particularly dairy goats. These data are poorly documented for goats, but they can reveal early pathological metabolic changes in transiting female goat organism, enabling successful prophylactic, as well as, therapeutic intervention.",
publisher = "Massimo Morgante",
journal = "Large Animal Review",
title = "Energy metabolism indicators and body condition in peripartal period of alpine goats",
pages = "18-13",
number = "1",
volume = "26",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_5444"
}

Milošević-Stanković, I., Hristov, S., Maksimović, N., Popović, B., Davidović, V., Mekić, C., Dimitrijević, B., Cincović, M. R.,& Stanković, B.. (2020). Energy metabolism indicators and body condition in peripartal period of alpine goats. in Large Animal Review
Massimo Morgante., 26(1), 13-18.
https://hdl.handle.net/21.15107/rcub_agrospace_5444

Milošević-Stanković I, Hristov S, Maksimović N, Popović B, Davidović V, Mekić C, Dimitrijević B, Cincović MR, Stanković B. Energy metabolism indicators and body condition in peripartal period of alpine goats. in Large Animal Review. 2020;26(1):13-18.
https://hdl.handle.net/21.15107/rcub_agrospace_5444 .

Milošević-Stanković, I., Hristov, Slavča, Maksimović, Nevena, Popović, Blaženka, Davidović, Vesna, Mekić, Cvijan, Dimitrijević, B., Cincović, Marko R., Stanković, Branislav, "Energy metabolism indicators and body condition in peripartal period of alpine goats" in Large Animal Review, 26, no. 1 (2020):13-18,
https://hdl.handle.net/21.15107/rcub_agrospace_5444 .