TAILIEUCHUNG - báo cáo khoa học: "Differences in adaptive abilities of three breeds of Chinese pigs."

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Differences in adaptive abilities of three breeds of Chinese pigs. | Génét. Sél. Evol. 1984 16 1 85-102 Differences in adaptive abilities of three breeds of Chinese pigs. Behavioural and neuroendocrine studies p. MORMÈDE R. DANTZER . BLUTHE et . CARITEZ . Laboratoire de N eurobiologie du Comportement University de Bordeaux II F 33076 Bordeaux Cedex . Domaine experimental du Magneraud . 52 F 17700 Surg eres Summary In three breeds of Chinese pig Mei-Shan Jin-Hua Jia-Xing the general behavioural reactivity was investigated as well as reactivity of the pituitary-adrenal axis and the sympathetic-adrenal medullary system. A F 2 cross Landrace X Mei-Shan X Landrace was used as control. These breeds displayed a large range of behavioural reactivity to a novel environment test with females generally more active than males. Chinese pigs had higher plasma levels of cortisol and showed a sexual dimorphism in plasma ACTH levels. Complex relationships were found between behavioural reactivity and endocrine characteristics a high behavioural reactivity being associated with low plasma levels of ACTH corticosteroids and adrenaline. These results beside their interest for further understanding of the recently introduced Chinese breeds open new perspectives for further studies of relationships between hormones and adaptive behaviours. Key words Pig Chinese breeds behaviour neuroendocrinology. Résumé Etude comportementale et neuroendocrinienne de trois races de pores chinois La réactivité comportementale et neuroendocrinienne ACTH cortisol catecholamines de trois races de pores chinois Mei-Shan Jin-Hua Jia-Xing a été étudiée dans des tests standardises. Un backcross Landrace X Mei-Shan X Landrace a été utilise comme contrôle. Une large gamme de réactivité a été observée lorsque les animaux sont introduits dans un environnement nouveau les porcelets de race Mei-Shan étant les moins actifs. Par ailleurs les femelles se sont révélées plus actives que les males. Les pores chinois ont des taux circulants de cortisol deux fois plus .

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