期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
本溪太子河流域洛氏鱥个体繁殖力研究 被引量:14
1
作者 王茂林 李保民 +4 位作者 姜玉声 孟昭勇 张迎召 苏骁 姜志强 《长江大学学报(自科版)(中旬)》 CAS 2013年第10期28-32,6-7,共5页
研究了本溪太子河流域洛氏鱥(Phoxinus lagowskii Dybowsky)个体繁殖力及其与生物学指标的关系。结果表明:其个体绝对繁殖力为601 s.1~15775.0粒,个体相对繁殖力 FL 为75.8~1132.9粒/cm , FW 为64.7~602.3粒/g ;个体绝对繁殖... 研究了本溪太子河流域洛氏鱥(Phoxinus lagowskii Dybowsky)个体繁殖力及其与生物学指标的关系。结果表明:其个体绝对繁殖力为601 s.1~15775.0粒,个体相对繁殖力 FL 为75.8~1132.9粒/cm , FW 为64.7~602.3粒/g ;个体绝对繁殖力与体长、净体重、卵巢重呈正相关,与成熟系数、肥满度负相关,但与成熟系数相关关系不显著;个体相对繁殖力 FL 与成熟系数、肥满度相关关系不显著,与各生物学指标正相关;个体相对繁殖力 Fw 除了与肥满度呈负相关外,与其余各生物学指标正相关,但与成熟系数、肥满度相关关系不显著。 展开更多
关键词 洛氏鱥 (Phoxinus lagowskii dybowsky) 繁殖力 生物学指标
下载PDF
黑龙江茴鱼胚胎的发育及仔、稚、幼鱼的生长 被引量:8
2
作者 韩英 张澜澜 +1 位作者 赵吉伟 李海龙 《淡水渔业》 CSCD 北大核心 2009年第4期17-21,共5页
采用Bouin氏液固定、剥离卵膜的方法对黑龙江茴鱼(Thymallus arcticus grubei Dybowski)的胚胎发育及孵出后仔鱼卵黄囊的吸收情况进行了观察,同时测定65日龄内的仔、稚、幼鱼生长状况。结果显示:黑龙江茴鱼卵是典型的端黄卵,其卵裂方式... 采用Bouin氏液固定、剥离卵膜的方法对黑龙江茴鱼(Thymallus arcticus grubei Dybowski)的胚胎发育及孵出后仔鱼卵黄囊的吸收情况进行了观察,同时测定65日龄内的仔、稚、幼鱼生长状况。结果显示:黑龙江茴鱼卵是典型的端黄卵,其卵裂方式为盘状卵裂。胚胎发育可分为22个期,包括受精卵、2细胞期、4细胞期、8细胞期、16细胞期、32细胞期、64细胞期、多细胞期、囊胚早期、囊胚中期、囊胚晚期、原肠早期、原肠中期、原肠晚期、神经胚期、胚孔封闭期、眼囊出现期、胸鳍芽出现期、晶体出现期、眼色素沉积期、循环期和出膜期,至发眼(晶体出现期)需75.84℃.d,至破膜需117℃.d;受精卵膜较鲑科鱼类薄而柔软,胚体头尾绕卵黄囊超过一周,晶体出现在眼色素沉积期之前;仔鱼卵黄囊的体积随着日龄的增加而逐渐减小,4日龄前吸收较快,此后吸收相对较慢;仔鱼在240℃.d(11日龄)左右时出现鳔并开始上浮,260℃.d(16日龄)左右时开口;积温达到346.9℃.d(20日龄)时卵黄囊完全被吸收,仔鱼期结束,进入稚鱼期;稚鱼在36日龄之前生长相对较缓慢,在36日龄后增长较快;在积温达到546.3℃.d(38日龄)时,稚鱼奇鳍褶开始退化,进入幼鱼期。 展开更多
关键词 黑龙江茴鱼(Thymallus arcticus grubei Dybowski) 胚胎发育 仔鱼生长
下载PDF
Genetic diversity and differentiation of the Dybowski's frog(Rana dybowskii) in Northeast China 被引量:5
3
作者 张明 贾学渊 马建章 《Journal of Forestry Research》 SCIE CAS CSCD 2010年第2期239-245,I0008,共8页
The genetic diversity and population structure of the Dybowski's frog(Rana dybowskii) were investigated by using 11 polymorphic microsatellite loci.Total 75 individuals were sampled from six populations in Lesser K... The genetic diversity and population structure of the Dybowski's frog(Rana dybowskii) were investigated by using 11 polymorphic microsatellite loci.Total 75 individuals were sampled from six populations in Lesser Khingan Mountains and Changbai Mountains,China.Results showed that allele number of the 11 microsatellite loci was in the range of 2-10 in all populations,with the mean of 5.6.The average expected heterozygosity(HE) was 0.572,indicating a moderate polymorphism.The results of genetic differentiation coefficient(FST) showed that population genetic differentiation was significant between Changbai and Lesser Khingan Mountains(p〈0.001).This result was verified further by Nei's genetic distance(DA) based on UPGMA phy-logenetic trees and by AMOVA analysis.In conclusion,the populations distributed in Lesser Khingan Mountains and Changbai Mountain are proposed to be two distinct management units(MUs) for their protection and management. 展开更多
关键词 Dybowski's frog(Rana dybowskii) genetic diversity genetic differentiation management units(MUs) MICROSATELLITE
下载PDF
Morphometric discrimination of wild from farmed Dybowski’s frog (Rana dybowskii) based on hindlimb length 被引量:3
4
作者 XIA Rui HUANG Xiao-ming +3 位作者 YANG Shu-hui XU Yan-chun Ying Lu Thomas D. Dahmer 《Journal of Forestry Research》 SCIE CAS CSCD 2011年第2期269-274,共6页
Commercial farming of anuran species that are declining in the wild raises a need to discriminate wild from farmed frogs.We hypothesized wild frogs might have extended hindlimbs due to greater frequency or intensity o... Commercial farming of anuran species that are declining in the wild raises a need to discriminate wild from farmed frogs.We hypothesized wild frogs might have extended hindlimbs due to greater frequency or intensity of jumping relative to farmed frogs,highlighting a morphometric approach to discrimination of wild from farmed frogs using hindlimb length.In the present study,Dybowski's frog(Rana dybowskii) was used to test this hypothesis.We measured body mass(Mb) and hindlimb length(Lh) of 2-year old farmed frogs and wild frogs aged 2 to 5 years.Dybowski's frog demonstrated significant dimorphism in Mb and Lh.Mb was significantly greater among farmed 2-year old frogs in both sexes(p=0.000),while only among females was Lh significantly greater for wild frogs(p=0.000).Lh/Mb was used as an index for origin discrimination to eliminate the influence of Mb due to variation of husbandry conditions among farms.Mean Lh/Mb for farmed frogs was significantly lower than for wild frogs(p=0.000) in the 2-year old age class.Discrimination correctly classified 84.4% of farmed and 96.3% of wild male frogs.Among females,92.9% of farmed frogs and 90.1% wild frogs were correctly classified.The overall correctness of classification was 92.1% and 90.8% for males and females,respectively.However,Lh/Mb revealed variation with age,resulting in reduced discriminative power for frogs ≥3 years old.We introduced a coefficient Ce to adjust the Lh/Mb of frogs ≥3 years to the level equivalent to 2-year frogs.The adjustment achieved 89.5% for overall correctness of origin for wild males and 92.4% for wild females ≥3 years old.These results show that Lh/Mb is an effective index to discriminate wild from farmed Dybowski's frog.Since the physical demands of jumping are common among anurans,this index is also potentially applicable to other anuran species. 展开更多
关键词 Dybowski's frog morphometric discrimination WILD FARMED Rana dybowskii
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部