closed breeding

Application of Preparation Chromosome with ConA in Closed Breeding Microtus fortis

封闭群东方田鼠染色体制备中ConA的应用技术研究

The number of tail bone is different: Henan 26, Hebei 28. Conclusion Because of long closed breeding, KM mice of Henan Medical University are difference at tail length and the number of tail bone from other KM mice. The tail is more longer.

本中心小鼠尾骨节数分别为26，而河北医科大学KM小鼠尾骨为28节。结论：由于长期的封闭饲养，本中心KM小鼠与其它KM小鼠存在差异：尾较长，30周龄长2cm。

Closed nucleus breeding in a small population inevitably result in inbreeding and decreasing of genetic variance.

小群体的闭锁选育不可避免产生近交及遗传方差下降，导致近期与远期选择效果的矛盾。

Comparison of Closed Herd Breeding and Opened Selection

全闭锁群体继代选育和开放式选育效果比较

Soilless breeding eel can be further divided into running water breeding and closed water breeding.

鳝鱼无土养殖可分为流水无土养殖和静水无土养殖两种类型。

This paper discusses closed water breeding techniques of eel from the design of the pool, treatment of seed eels and management.

本文主要从鳝池的设计、苗种处理、日常管理等方面探讨了鳝鱼的静水无土养殖技术。

Observation of Digestive Ability of Adult Microtus Fortis in Closed Breeding

封闭繁殖的成年东方田鼠消化能力的观察

Article 20 In nature reserves and areas closed to hunting, and during seasons closed to hunting, the hunting and catching of wildlife and other activities which are harmful to the living and breeding of wildlife shall be prohibited.

第二十条在自然保护区、禁猎区和禁猎期内，禁止猎捕和其他妨碍野生动物生息繁衍的活动。