Social Behaviour in Lambs ( Ovis aries ) Reared under an Intensive System during the Prepuberty Period

Kallirroi Papadaki, Athanasios Samaras, Michail Pavlidis, Iosif Bizelis and George P. Laliotis ()
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Kallirroi Papadaki: Laboratory of Animal Breeding and Husbandry, Department of Animal Science, Agricultural University of Athens, 75 Iera Odos, GR123456 Athens, Greece
Athanasios Samaras: Department of Biology, University of Crete, GR70013 Heraklion, Greece
Michail Pavlidis: Department of Biology, University of Crete, GR70013 Heraklion, Greece
Iosif Bizelis: Laboratory of Animal Breeding and Husbandry, Department of Animal Science, Agricultural University of Athens, 75 Iera Odos, GR123456 Athens, Greece
George P. Laliotis: Laboratory of Animal Breeding and Husbandry, Department of Animal Science, Agricultural University of Athens, 75 Iera Odos, GR123456 Athens, Greece

Agriculture, 2024, vol. 14, issue 7, 1-12

Abstract: The social behaviour of twenty-one lambs of three sheep breeds (Chios, Karagouniki, and Synthetic) was observed from the age of 2.5–7 months, divided into three equal periods (A, B, C) of 1.5 months each. The frequency of the performed agonistic behaviours was higher ( p < 0.01) before four months of age (period A: 11 × 10 −4 ± 2 × 10 −4 ) compared to the other periods (B: 5 × 10 −4 ± 1 × 10 −4 ; C: 8 × 10 −4 ± 1 × 10 −4 ). The same was noticed for affiliative behaviours performed (A: 21 × 10 −4 ± 3 × 10 −4 ; B: 8 × 10 −4 ± 1 × 10 −4 ; C: 5 × 10 −4 ± 1 × 10 −4 ), and for agonistic and affiliative behaviours received ( p < 0.001). The lambs had higher levels of wool cortisol (23.398 ± 5.344 pg/mg; p < 0.01) at period C compared to A (7.899 ± 1.19 pg/mg). Breed affected the affiliative behaviours. Karagouniki showed higher frequencies than Synthetic (16 × 10 −4 ± 3 × 10 −4 vs. 6 × 10 −4 ± 1 × 10 −4 ). Blood cortisol was higher ( p < 0.05) in the Synthetic (4.789 ± 0.928 ng/mL) compared to the Chios (1.805 ± 0.417 ng/mL) breed. Overall, lambs’ behaviour displayed changes upon time, with four months of age being a step to a next developmental stage with fewer social interactions and higher levels of cortisol.

Keywords: social behaviour; sheep; cortisol; prepuberty; development; breed (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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