单 位：
安徽师范大学生命科学学院;中国林业科学研究院森林生态环境与保护研究所;安徽省扬子鳄繁殖研究中心
关键词：
扬子鳄;饲养种群;繁殖;由线拟合;时间序列分析
摘 要：
通过对宣城扬子鳄繁殖研究中心三代繁殖鳄1982—2003年繁殖力有关参数的分析,结果表明近三年来繁殖研究中心扬子鳄产卵量明显减少;亲代受精率为(83.80±2.37)%、孵化率为(89.53±0.86)%;发现F1受精率为(79.38±2.74)%、孵化率为(83.78±1.95)%;F2代个体受精率为(68.7±1.84)%、孵化率为(88.16±1.68)%;通过单因素方差分析F(受精率)=4.33(P<0.05)、F(孵化率)=4.56(P<0.05)差异显著。分析影响扬子鳄繁殖的因素发现:产卵量明显减少可能与亲代鳄逐渐退出繁殖期、F1代鳄整体产卵能力有下降趋势、F2代鳄没有大规模进入繁殖期有关;分析历史资料发现扬子鳄产卵窝数与4月份的温度相关性高(R=0.979,P<0.01);作者认为F1、F2代个体与亲代之间的受精率、孵化率有显著差异,近交衰退、遗传多样性的丧失有密切关系。利用时间序列分析建立理想状态下饲养扬子鳄种群数量估计模型,预测10年内扬子鳄饲养将可能达到19000尾;根据该种群增长模式及种群年龄结构特点,应扩大饲养规模,特别是育成鳄饲养池及幼鳄饲养池的建设。
译 名：
THE ANALYSIS ON THE REPRODUCTIVE ABILITY OF CHINESE ALLIGATOR(ALLIGATOR SINENSIS) IN CAPTIVE POPULATION IN ANHUI PROVINCE AND THE ANTICIPATION OF POPULATION INCREASE
作 者：
WU Lu-Sheng~(1,2),WU Xiao-Bing~1,JIANG Hong-Xing~(3,4) and WANG Chao-Lin~5(1.College of Llife Sciences,Anhui Normal University,WuHu 241000;2.Ministry of Science and technology,Jinan University,guangzhou 510632;3.Research institute of forestry ecology,environment and protection,Chinese academy of forestry,Beijing 100091;4.National wildlife research and development center,state forestry administration,Beijing 100091;5.Anhui research center for Chinese alligator reproduction.Xuan Zhou 242034)
关键词：
Chinese Alligator;Captive population:Reproduction;modelling Time series analysis
摘 要：
According to analyses of the reproductive parameters in three generations of Chinese alligator during 1982 to 2003 in Anhui Research Center for Chinese Alligator Reproduction(ARCCAR),Xuan Zhou,China,The results Showed that the number of eggs decreased significantly in the recent three years.The rate of fertilization and hatching was(83.80±2.37)% and(89.53±0.86)%,in parental generation,(79.38±2.74)% and(83.78±1.95)% in first filial(F1)generation and(68.7±1.84)%and(88.16±1.68)% in second filial generation(F2).Based on one way ANOVA,the rates of fertilization and hatching among three generations are significantly different(F_((ROF))=4.33,P<0.05;F_((ROH))=4.56,P<0.05).The analysis on factors affecting(alligator's) reproduction showed that the number of eggs decreased obviously,and it may be caused by the parental(alligator's) losing their reproduction and the current of the F1 alligator's reproductive ability declining,not all the F2 alligator's entering reproductive period.We also found that the number of stock alligators was correlated with temperature in April(R=0.979,P<0.01),and the significant difference between the rate of fecundation in filial generation and parental generation was related to inbreeding depression and the lose of genetic diversity.A model in ideal state was built to predict the increase of captive population on the basis of the Time Series Analysis.It was predicted that the number of the captive population would reach 19000 individuals in ten years by this model.We suggest that the ARCCAR should broaden the size of breeding,especially,should broaden the construction of the pond of juvenile alligators and young alligators according to the anticipation of this model together with the consideration of the age structure of the captive population.
