期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Determination and Evaluation of Heavy Metal Content of Freshwater Economic Fish in Northeast Guangdong
1
作者 Yanmei ZHONG qingmei zheng +2 位作者 Chunyan HAN Rushu WEN Hongli ZHANG 《Asian Agricultural Research》 2015年第1期61-65 70,70,共6页
Concentrations of lead( Pb),cadmium( Cd),chromium( Cr),copper( Cu),zinc( Zn) and manganese( Mn) were measured in various organs( such as in liver and muscle) from 9 species of freshwater economic fishes which were col... Concentrations of lead( Pb),cadmium( Cd),chromium( Cr),copper( Cu),zinc( Zn) and manganese( Mn) were measured in various organs( such as in liver and muscle) from 9 species of freshwater economic fishes which were collected from northeast area of Guangdong Province. The concentration of metals was measured by inductively coupled plasma atomic emission spectrometry( ICP- AES). Results showed that the levels of metals in hepatopancreas of the fishes were found in order of Zn > Pb > Cu > Hg > Cd,while in muscles were Zn > Cr> Pb > Mn > Cu > Cd. In general,the metals concentrations were significantly higher in liver samples than that in muscle samples. Based on the " pollution index of single factor",the fishes,to one degree or another,were polluted by Pb,Cd,Cr,Cu and Zn,and pollution levels were mostly followed by Pb > Cd > Cr > Cu > Zn. The indexes of Pb and Cd tested in hepatopancreas of the fishes were in a majority exceeded the national safety criteria for food in China. What's more,it was found that the contents of the heavy metals in fishes did not vary with the trophic level which they belong to. In summary,the fishes were polluted by Pb,Cd,Cr,Cu and Zn to some extent,which indicated that hidden danger of heavy metals pollution was present in ecological environment or safety in fishery production in the area. 展开更多
关键词 ECONOMIC FISH Heavy metal Muscle Liver EVALUATION
下载PDF
Genetic diversity and population structure of indigenous chicken breeds in South China 被引量:1
2
作者 Xunhe HUANG Jinfeng ZHANG +6 位作者 Danlin HE Xiquan ZHANG Fusheng ZHONG Weina LI qingmei zheng Jiebo CHEN Bingwang DU 《Frontiers of Agricultural Science and Engineering》 2016年第2期97-105,共9页
A total of 587 individuals from 12 indigenous chicken breeds from South China and two commercial breeds were genotyped for 26 microsatellites to investigate the genetic diversity and population structure.All microsate... A total of 587 individuals from 12 indigenous chicken breeds from South China and two commercial breeds were genotyped for 26 microsatellites to investigate the genetic diversity and population structure.All microsatellites were found to be polymorphic.The number of alleles per locus ranged from 5 to 36,with an average of12.10±7.00(SE).All breeds,except White Recessive Rock,had high allelic polymorphism(>0.5).Higher genetic diversity was revealed in the indigenous chicken breeds rather than in the commercial breeds.Potential introgression from the commercial breeds into the indigenous chickens was also detected.The population structure of these indigenous chicken breeds could be explained by their geographical distribution,which suggested the presence of independent history of breed formation.Data generated in this study will provide valuable information to the conservation for indigenous chicken breeds in future. 展开更多
关键词 microsatellites genetic diversity population structure indigenous chicken South China CONSERVATION
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部