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1. The Temporal and Spatial Distribution of Heavy Metals in Helice tridens in the Tidal Flat of Yancheng | |||
YU NA,SUN Xinjin,LI Xiaobo,WANG Qun | |||
Biology 14 October 2009 | |||
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Abstract:Between November 2006 and July 2007, we determined the heavy metal content in Helice tridens crabs inhabiting the tidal flat of Yancheng. The results showed that the accumulation of the essential elements Fe, Zn, Cu, Mn, and Ni was higher than that of the toxic element Pb; the specific relationship between elemental concentrations was Fe > Zn > Cu > Mn > Ni > Pb. We analyzed the seasonal distribution of the heavy metal content in the crabs, and found that there were seasonal differences in the contents of the six heavy metals. The seasonal distributions of the elements were in the following order: Fe content in spring > summer > autumn; Cu and Mn content in autumn > summer > spring; Zn, Ni, and Pb content in summer > spring > autumn. Thus, it was considered that temperature is not the principal factor influencing the accumulative rate of the heavy metals in H. tridens individuals. For example, there were certain differences in the heavy metal content in the crabs collected from different sampling points in autumn. In the cluster analysis, ten sampling points were approximately classified into three groups, which represented the coastal salt-industry culture area, the nature-reserve central area, and the estuarine industrial water area. The results of the cluster analysis suggested that the pollutants in the crabs’ habitats influenced the accumulation of heavy metals in their bodies. Moreover, we compared related data and found that Cu accumulation in the bodies of the crabs inhabiting the tidal flat of Yancheng was relatively low while the accumulation of Zn, Mn, Ni, and Pb was relatively high. | |||
TO cite this article:YU NA,SUN Xinjin,LI Xiaobo, et al. The Temporal and Spatial Distribution of Heavy Metals in Helice tridens in the Tidal Flat of Yancheng[OL].[14 October 2009] http://en.paper.edu.cn/en_releasepaper/content/35796 |
2. Cross-species microsatellites amplification for a vulnerable species endemic of China, Reeves’s pheasant (Syrmaticus reevesii) | |||
Wang Ning,Chang Jiang,Sun Quanhui,Gu Langyu,Zhangzhengwang | |||
Biology 25 February 2009 | |||
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Abstract:Cross-species microsatellite amplification can be an effective way in obtaining microsatellite loci for closely related taxa in bird species. The Reeves’s pheasant, Syrmaticus reevesii, is a vulnerable species endemic of China. In order to study the population genetics and paternity of its wild populations, we obtained 10 polymorphic microsatellite markers from cross-species amplification. The number of alleles per locus varies between two and twelve, with expected heterozygosity ranging from 0.32 to 0.802 (n =75). These polymorphic loci are facilitating the study of paternity identification of Reeves’s pheasant and also provide a valuable tool for future studies on conservation genetics of this species. | |||
TO cite this article:Wang Ning,Chang Jiang,Sun Quanhui, et al. Cross-species microsatellites amplification for a vulnerable species endemic of China, Reeves’s pheasant (Syrmaticus reevesii) [OL].[25 February 2009] http://en.paper.edu.cn/en_releasepaper/content/29630 |
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