四季鹅赖抱机理的神经内分泌研究

NEUROENDOCRINE STUDY ON BROODINESS

试验Ⅰ：４只鹅于开始赖抱时口服多巴胺（ＤＡ）受体阻断剂——醒抱灵Ａ（５０～１００ｍｇ／ｋｇ体重），处理后血浆催乳素（ＰＲＬ）和β－内啡肽（β－ＥＮＤ）均急剧下降，赖抱持续时间从３只对照鹅的２９．３３±０．５４ｄ缩短为７．００±２．２６ｄ。试验Ⅱ：６只鹅开始赖抱时口服５－羟色胺（５－ＨＴ）受体阻断剂——醒抱灵Ｂ（１０ｍｇ／ｋｇ体重），处理后ＰＲＬ和β－ＥＮＤ亦急剧下降，赖抱期缩短至４．２０±１．５８ｄ，效果比醒抱灵Ａ好，说明５－ＨＴ在四季鹅赖抱机理中具有较为重要的作用。５只对照鹅赖抱期为２９．２０±１．５６ｄ。

Broodiness mechanism of Siji goose was studied. In experiment I, 4 female geese were given dopamine(DA) receptor blocking agent orally at dose of 50～100mg/kg·(B.W.) from the beginning of broodiness. The levels of plasma PRL and β END decreased dramatically after treatment. The broodiness days were shortened to 7.00±2.26 days compared with 29.33±0.54days of control group. In experiment Ⅱ,6 brooding geese were administrated with 5 hydroxytryptamine (5 HT) receptor blocking agent at dose of 10mg/kg·(B.W.). Plasma PRL and β END also decreased dramatically after treatment. The broodiness days were declined to 4.20 ± 1.58 days compared with 29.20 ± 1.56 days of control group. The effect of 5 HT receptor blocking agent, is better than that of DA receptor blocking agent, it was suggested that 5 HT played an important role in the regulation of broodiness.