TAILIEUCHUNG - Báo cáo khoa học: "Cardiovascular, endocrine and behavioural responses to suckling and permanent separation in goats"

Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú yđề tài: Cardiovascular, endocrine and behavioural responses to suckling and permanent separation in goats. | Winblad von Walter et al. Acta Veterinaria Scandinavica 2010 52 51 http content 52 1 51 AVS ACTAVETERINARIA SCANDINAVICA RESEARCH Open Access Cardiovascular endocrine and behavioural responses to suckling and permanent separation in goats 1 2 1 1 1 Louise Winblad von Walter Lena Lidfors Andrzej Madej Kristina Dahlborn Eva Hydbring-Sandberg Abstract Background Suckling can be a peaceful or vulnerable event for goats and kids whereas separation is suggested as stressful. The aim of this study was to investigate physiology and behaviour in these two different situations in dairy goats. Methods Four studies were performed with seven goats kept with their first-born kid in individual boxes. The goats were videotaped and heart rate and arterial blood pressure were recorded every minute by telemetry from parturition until 24 hours after separation. One to two days after parturition Study 1 was performed with analyses of heart rate and blood pressure around a suckling. In Study 2 performed 3-5 days after parturition blood sampling was done before during and after suckling. Study 3 was performed 4-6 days post partum with blood sampling before and after a permanent goat and kid separation. In addition vocalisations were recorded after separation. Blood samples were obtained from a jugular vein catheter and analysed for plasma cortisol p-endorphin oxytocin and vasopressin concentrations. Study 4 was performed during the first N1 and second nights N2 after parturition and the nights after Study 2 N3 and 3 N4 . Heart rate blood pressure and time spent lying down were recorded. Results The kids suckled 2 times per hour and each suckling bout lasted 43 15 s. In Study 1 heart rate and blood pressure did not change significantly during undisturbed suckling. In Study 2 plasma cortisol P during suckling and P five minutes after suckling and p-endorphin P concentrations increased during suckling but oxytocin and vasopressin concentrations did .

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