Maternal stress in sheep during late pregnancy influences sperm quality in early puberty of the offspring

Henrique, Fábio Luís; Bezerra, Helena Viel Alves; Polato, Heloise Zavatieri; Fernandes, Arícia Christofaro; Zanella, Adroaldo José; Alves, Maíra Bianchi Rodrigues; Celeghini, Eneiva Carla Carvalho; Batissaco, Leonardo; Strefezzi, Ricardo de Francisco; Pulido-Rodríguez, Lina Fernanda; Hooper, Henrique Barbosa; Titto, Cristiane Gonçalves

doi:10.1016/j.theriogenology.2019.10.008

Cited by 3 publications

(1 citation statement)

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“…Stress caused at weaning can negatively impact the overall health and production of the lamb as shown in decreased growth rates and food intake (Schichowski et al, 2008;Pascual-Alonso et al, 2015;Barnard et al, 2016), changes in physiologic, endocrine and immune responses, and increased susceptibility to disease and infection (Orgeur et al, 1999;Backes et al, 2015;Destrez et al, 2017) manifested in the post-weaning period. Effect of stress at weaning on future reproductive performance of ram lambs has not been reported, but other factors such as maternal stress during late pregnancy (Henrique et al, 2020) and birth season (Sánchez-Dávila et al, 2019) have been reported to influence post-weaning sperm quality and sexual development of ram lambs.…”

Section: Introductionmentioning

confidence: 99%

Sexual performance and semen quality of pubertal lambs treated with different weaning methods

et al. 2022

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Abstract. The objective of this study was to determine the effect of the weaning method on lamb stress, body weight, sexual behavior, and semen quality of Saint Croix male lambs. The present study was carried out during the late spring and summer of 2018 in the northeast of Mexico. Sixty male lambs born as twins or triplets (3.2 ± 0.6 kg birth weight) and weaned at 60 d of age (19.21 ± 1.8 kg weaning weight) were divided into two weaning methods: complete separation from the dams (CS; the lambs were moved to a pen that was at 500 m of distance from the dams) and separation with contact from the dams (SCD); the lambs were physically separated by a steel mesh that prevented the lambs from having the possibility of sucking milk from their mothers, but they maintained permanent visual and auditory contact. Cortisol levels were determined 3 d before and 7 d after weaning. Lambs were evaluated as 3-month-old lambs for sexual behavior and semen quality for 9 weeks. The effects of the weaning method (M), week (W), and the interaction M × W were significant on body weight and cortisol levels (P<0.001). The SCD lambs had higher cortisol levels at 3, 5, and 7 d after weaning than CS lambs (P<0.001). The CS lambs had higher body weight during the first 4 weeks after weaning than SCD lambs (P<0.001). The weaning method had no effect on scrotal circumference, sexual behavior, and semen quality traits, except for progressive sperm motility, being better for the lambs that were completely separated (P<0.05). The results from this study show that complete separation of lambs and ewes at weaning is an effective method to reduce lamb stress and improve lamb growth after weaning, but it did not have long-term effects on sexual behavior and semen quality of Saint Croix male lambs.

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Section: Introductionmentioning

confidence: 99%

Sexual performance and semen quality of pubertal lambs treated with different weaning methods

et al. 2022

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Stress during first gestation of ewes impairs memory and learning of male offspring

et al. 2021

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Features of the functional state of the organism of sheep under stress

Yuldashbaev

Vatnikov

Руденко

et al. 2022

Vestn. Ross. univ. družby nar., Ser. Agron. životnovod.

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The stresses that arise during routine animal husbandry procedures, such as milking, shearing, weighing, loading and hoof care, are an actual problem in animal husbandry. The components of economic damage under stress are a decrease in overall resistance and productivity, deterioration in product quality, an increase in labor costs and funds per unit of production, an increase in animal morbidity and mortality. The studies were carried out on the basis of Belozernoe farm in the Salsky district, the Rostov region. A complex of clinical and laboratory studies was performed on 18 sheep (10 Romanov and 8 Tsigay breeds) aged 2 to 3 years, before and after a planned routine shearing. Stress in sheep caused by planned shearing was clinically manifested by general depression, in some cases, subfebrile fever, moderate tachypnea and tachycardia. It was shown that stress was accompanied by anemia, the development of erythropenia and leukopenia. Immunocompetent cells in the blood of experimental animals during stress development were analyzed. Severe lymphocytopenia was found to occur after a haircut. In addition, in the blood of experimental animals under stress, a tendency to a decrease in T-total cells was noted, which was accompanied by an increase in 0-cells, which was significant in sheep of the Tsigay breed (p0.05). When analyzing the main immunoregulatory T cells in sheep under stress, a significant increase in T-suppressors was revealed with a relatively stable level of T-helpers in the blood studied. Thus, a significant (p0.05) increase in the level of T-suppressors in sheep of Romanov and Tsigay breeds was recorded; it was by 1.15 and 1.19 times higher compared with the initial data. It should be noted that we did not find any significant differences between animals of Romanov and Tsigay breeds in stress development after shearing. The obtained data should be taken into account in the further search for methods of stress correction in sheep.

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Maternal stress in sheep during late pregnancy influences sperm quality in early puberty of the offspring

Cited by 3 publications

References 45 publications

Sexual performance and semen quality of pubertal lambs treated with different weaning methods

Sexual performance and semen quality of pubertal lambs treated with different weaning methods

Stress during first gestation of ewes impairs memory and learning of male offspring

Features of the functional state of the organism of sheep under stress

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