人工饲养条件下高原鼠兔生长和发育的初步研究

本文研究了人工饲养条件下高原鼠兔的生长发育情况，并和其他种鼠兔的生长作了比较。室内高原鼠兔比野外的生长快，人工饲养的阿富汗鼠兔和北美鼠兔生长期短，成熟早。

STUDY 0N THE GR0WTH AND DEVEL0PMENT 0F PLATEAU PIKA UNDER THE C0NDITION 0F ARTIFICIAL FEEDING

In this paper， the growth and development of plateau pika (Ochotcna curzoztioe)from laboratory colonies were reported and compared with that in the field and other species of pikas (0．rufescens rufescens，0,princeps) from labolatory colonies． The growthscan be divided into two：the rapid-growth Period (at 0— 3O days of age) and the slow growth period (aftet 30 days)．During 0- 5 days，the growth rate is higher in this period than in othet ones, but the highest growth rate of ear length occurs at 5- 10 days of age． Length of ear and hind foot reaches the maximum values at 40-50 and 55— 65 days of age respectively． After 80 days， the growth of body length showsvery slowly and tends to stop growing． According to the analysis and calculation， the regressive equations of growth of the pikas body weight in different agesare:W =A +Bt= l0．7+2．6t (0≤t≤10 days of age)W =A +Bt=1．8+3．6t (10≤ t≤30 days of age) W =A +B1nt= -18．274+37．5751nt (30≤t≤ 65 days of age)W =A —Ce^-Bt =220-95．97e^-0.002424t (65≤t≤ 105 days of age) Based on the study of the growth and development of plateau pika，we divided the process of its growth and development into 4 different stages． According to the comparison，the growth speed is faster in the laboratory than in the field．The glowth period of plateau pika is shorter than that of Afghan pika(Ochotona rufescens rufescens)and North American pika (O．princeps)． These results suggetsed that the characteristics of growth and development of plateau pika is profitable for taming and being utilized as a new laboratory anima1．