This study was conducted to define the taxonomic status of Spermophilus in the plague area of Dingbian County in Shaanxi Province,China,through the two-factor variance analysis of morphological characteristics,DNA bar...This study was conducted to define the taxonomic status of Spermophilus in the plague area of Dingbian County in Shaanxi Province,China,through the two-factor variance analysis of morphological characteristics,DNA barcoding,and chromosome karyotype analysis.展开更多
Plague is a virulent infectious disease in China. In this study, ＇3S＇ technology was used to perform spatial autocorrelation analysis and spatial interpolation analysis for Spermophilus dauricus （S. Dauricus, a spe...Plague is a virulent infectious disease in China. In this study, ＇3S＇ technology was used to perform spatial autocorrelation analysis and spatial interpolation analysis for Spermophilus dauricus （S. Dauricus, a species of ground squirrel） captured in Manchuria City in 2015. The results were visually inspected. During the two-month （May to July） plague surveillance in 2015, 198 S.展开更多
This study was conducted to explain the karyological characteristics of S.xanthoprymnus from Gencali in Turkey.The chromosomes of the specimens were traditionally stained and examined according to standard procedures....This study was conducted to explain the karyological characteristics of S.xanthoprymnus from Gencali in Turkey.The chromosomes of the specimens were traditionally stained and examined according to standard procedures.The chromosomes were determined according to centromere positions by examining the photographs of metaphase cells.The karyotype of S.xanthoprymnus contained 42 chromosomes(2n=42)and fundamental number of chromosomal arms NF=81 and the number of autosomal arms NFa=78.The karyotype includes four metacentric chromosomes ranging from large to small,three pairs of large and medium-sized submetacentric autosome,twelve ranging from large to medium size subtelocentric,and a pair of acrocentric autosomes.The X chromosome was determined as large subtelocentric and Y chromosome as small acrocentric.Due to there is no karyological information and geographical distribution of existentence cytotypes in Turkey,revelation of chromosomal structure in Anatolian ground squirrel populations will provide properly assessment of taxonomy of those rodents in further studies.展开更多
Geographic variability in vocalizations has been documented in many mammalian species. We examined to what extent it applies to the alarm calls of the European ground squirrel Spermophilus citellus. We recorded the ca...Geographic variability in vocalizations has been documented in many mammalian species. We examined to what extent it applies to the alarm calls of the European ground squirrel Spermophilus citellus. We recorded the calls of 82 adult individuals from 5 natural colonies in the Czech Republic and 24 adult individuals from an artificial seminatural colony located in a Czech zoo. The founders of this colony originated from 4 different natural colonies in the Czech Republic. Our results showed that there are hardly any differences in the acoustic structure of the alarm calls between male and female European ground squirrels. Discriminant function analysis showed the highest degree of discriminability for the most isolated sites (54-74% of individuals classified correctly), whereas the lowest degree of discriminability was found for 2 interconnected colonies (38-40% individuals classified correctly). Individuals from the artificial seminatural colony were often classified correctly to this colony (58% classified correctly);however, the precision of the classification was comparatively relatively low, that is, many individuals from other colonies were incorrectly classified into this seminatural colony. This likely corresponds to the different origins of its founders. These findings indicate that there is a rather substantial geographic variability in the alarm calls of the European ground squirrel, and our study highlights its possible impact on conservation measures such as establishing artificial colonies or reintroductions.展开更多
Rodents are the main host animals that spread plague, and Spermophilus dauricus（S. dauricus） is the most common rodent in North China. In this study, a rodent density survey was carried out in China＇s Jilin Provinc...Rodents are the main host animals that spread plague, and Spermophilus dauricus（S. dauricus） is the most common rodent in North China. In this study, a rodent density survey was carried out in China＇s Jilin Province from April to August 2005. Moran＇s I and semivariogram curves were used to investigate the spatial distribution characteristics of the sampling data. We found that the spatial auto-correlation index was low and failed to generate a meaningful semivariogram curve. In this case, commonly used interpolators, such as kriging, were not suitable for mapping density over the study area. However, the Sandwich model, which is based on spatial stratified heterogeneity, could be applied to our data. Our results showed that the type of soil and land use significantly influenced the distribution of rodent density, and the interactive effect of these variables was much stronger than that of each variable alone. The Sandwich-estimated rodent density map showed that rodent density increased from the southeast to the northwest in Jilin Province. Finally, a framework of a rodent density survey using the Sandwich model was introduced.展开更多
基金supported by the grant of the Science and Technology Research and Development of Shaanxi Province[No.2012K16-12-03]
文摘This study was conducted to define the taxonomic status of Spermophilus in the plague area of Dingbian County in Shaanxi Province,China,through the two-factor variance analysis of morphological characteristics,DNA barcoding,and chromosome karyotype analysis.
基金supported by the National Natural Science Foundation of China(Grant no.83160430)the National Key Scientific Instrument and Equipment Development Projects of China(Grant no.2013YQ14037106)
文摘Plague is a virulent infectious disease in China. In this study, ＇3S＇ technology was used to perform spatial autocorrelation analysis and spatial interpolation analysis for Spermophilus dauricus （S. Dauricus, a species of ground squirrel） captured in Manchuria City in 2015. The results were visually inspected. During the two-month （May to July） plague surveillance in 2015, 198 S.
文摘This study was conducted to explain the karyological characteristics of S.xanthoprymnus from Gencali in Turkey.The chromosomes of the specimens were traditionally stained and examined according to standard procedures.The chromosomes were determined according to centromere positions by examining the photographs of metaphase cells.The karyotype of S.xanthoprymnus contained 42 chromosomes(2n=42)and fundamental number of chromosomal arms NF=81 and the number of autosomal arms NFa=78.The karyotype includes four metacentric chromosomes ranging from large to small,three pairs of large and medium-sized submetacentric autosome,twelve ranging from large to medium size subtelocentric,and a pair of acrocentric autosomes.The X chromosome was determined as large subtelocentric and Y chromosome as small acrocentric.Due to there is no karyological information and geographical distribution of existentence cytotypes in Turkey,revelation of chromosomal structure in Anatolian ground squirrel populations will provide properly assessment of taxonomy of those rodents in further studies.
基金the Ministry of the Environment of the Czech Republic(project no.SP/2d4/61/08).
文摘Geographic variability in vocalizations has been documented in many mammalian species. We examined to what extent it applies to the alarm calls of the European ground squirrel Spermophilus citellus. We recorded the calls of 82 adult individuals from 5 natural colonies in the Czech Republic and 24 adult individuals from an artificial seminatural colony located in a Czech zoo. The founders of this colony originated from 4 different natural colonies in the Czech Republic. Our results showed that there are hardly any differences in the acoustic structure of the alarm calls between male and female European ground squirrels. Discriminant function analysis showed the highest degree of discriminability for the most isolated sites (54-74% of individuals classified correctly), whereas the lowest degree of discriminability was found for 2 interconnected colonies (38-40% individuals classified correctly). Individuals from the artificial seminatural colony were often classified correctly to this colony (58% classified correctly);however, the precision of the classification was comparatively relatively low, that is, many individuals from other colonies were incorrectly classified into this seminatural colony. This likely corresponds to the different origins of its founders. These findings indicate that there is a rather substantial geographic variability in the alarm calls of the European ground squirrel, and our study highlights its possible impact on conservation measures such as establishing artificial colonies or reintroductions.
基金National Natural Science Foundation of China,No.41531179No.41421001+2 种基金No.41271404MOST,No.2016YFC1302504Special Scientific Research Fund of Public Welfare Profession of China,No.GYHY20140616
文摘Rodents are the main host animals that spread plague, and Spermophilus dauricus（S. dauricus） is the most common rodent in North China. In this study, a rodent density survey was carried out in China＇s Jilin Province from April to August 2005. Moran＇s I and semivariogram curves were used to investigate the spatial distribution characteristics of the sampling data. We found that the spatial auto-correlation index was low and failed to generate a meaningful semivariogram curve. In this case, commonly used interpolators, such as kriging, were not suitable for mapping density over the study area. However, the Sandwich model, which is based on spatial stratified heterogeneity, could be applied to our data. Our results showed that the type of soil and land use significantly influenced the distribution of rodent density, and the interactive effect of these variables was much stronger than that of each variable alone. The Sandwich-estimated rodent density map showed that rodent density increased from the southeast to the northwest in Jilin Province. Finally, a framework of a rodent density survey using the Sandwich model was introduced.
