绍鸭生长的内分泌机理  

Studies on the Endocrine Mechanism of Growth in Shao Duck

作　　者：杨培新[1] 吴美文[2] 

机构地区：[1]浙江大学动物科技学院,浙江杭州310029 [2]浙江大学核农业科学研究所

出　　处：《中国兽医学报》2000年第1期80-83,共4页Chinese Journal of Veterinary Science

基　　金：浙江省自然科学基金!(3 950 79)

摘　　要：通过测定与有关的激素研究了绍鸭生长的内分泌机理。生长期生长激素（ＧＨ）的最大值出现在３５日龄，整个生长期ＧＨ的变化模式是先升后降。血浆生长抑素（ＳＳ）的最大值出现在３日龄，整个生长期ＳＳ的变化模式是先降后升。ＧＨ和ＳＳ的变化有很强的负相关（r＝０．８１８３）。公母绍鸭生长期三碘甲状腺原氨酸（Ｔ３）、甲状腺素（Ｔ４）水平 的变化模式基本相同。整个生长期，Ｔ３水平先降后升。The mechanism of growth in Shao duck was investigated by measurement of hormones relative to growth. The maximum concentration of growth hormone(GH) was found at 35 days of age. The change pattern of GH during the developmental period was firstly increased and then decreased. The maximum concentration of somatostatin(SS) was observed at 3 days of age. Plasma SS firstly decreased and then increased during the developmental stage. Changes of concentrations of plasma GH and SS showed an inverse relationship (r=0.818 3). Both sexes showed a similar pattern in changes of plasma thyroid hormone during the sexual development. Plasma triiodothyronine (T 3) occured high level at the earlier stage of development (15 35 days of age) and significantly decreased at 55 days. High level of plasma thyroxine(T 4) was observed between 55 days of age and 95 days of age, thereafter decreased. High concentrations of plasma SS at the early stage of development (0 35 d) inhibited the secretion of GH. GH had limited effect on stimulation of growth at the early stage whereas high levels of T 3 appeared to be contributive to the early growth. The maximum concentration of GH and the minimum concentration of SS were due to highest speed of growth. The maximum concentration of T 4 at 95 days of age was related to the stimulation of development of gonads. Shao duck had a relatively short growth period with relatively early initiation of development of gonads.

关 键 词：生长激素 生长抑素 甲状腺素 绍鸭 生长发育 鸭 

分 类 号：S834.1[农业科学—畜牧学]