The paper reported the phenotype and allele frequency distribution of ABO and Rh(D) blood groups among Brahmin,an endogamous population from Visakhapatnam district,Andhra Pradesh,India.Blood samples of 100 unrelated B...The paper reported the phenotype and allele frequency distribution of ABO and Rh(D) blood groups among Brahmin,an endogamous population from Visakhapatnam district,Andhra Pradesh,India.Blood samples of 100 unrelated Brahmin individuals were screened for ABO and Rh(D) blood groups.The order of occurrence of ABO phenotypes was O>A>B.The corresponding allele frequencies were 0.530,0.315,and 0.155,respectively.The allele frequency of D (0.990) was more than d (0.010).The results were compared with the other caste population to understand the population variations.展开更多
Group size variations of the Arabian sand gazelle Gazella subgutturosa marica were studied during a period of drought at the Mahazat as-Sayd Protected Area in central western Saudi Arabia. Significant differences in m...Group size variations of the Arabian sand gazelle Gazella subgutturosa marica were studied during a period of drought at the Mahazat as-Sayd Protected Area in central western Saudi Arabia. Significant differences in median group sizes were observed between all seasons except summer. Single animals were observed mainly during summer while group sizes ex- ceeding 10 individuals were observed mainly during winter. Solitary male and female groups were typically observed during winter and mixed groups mainly during the autumn rutting period. Most mixed groups were two to four times larger during winter than summer. The adult sex ratio （male： female） for all seasons combined was in parity and highest during autumn （1：1.23）, probably as a result of prolonged drought conditions. The variability in group structure related to environmental conditions may be one factor permitting G. s. marica to adapt to hyper-arid habitats and climatic regimes in central western Saudi Arabia. The value of continuous monitoring of the gazelle population is emphasised for this drought prone region展开更多
Let G be a countable discrete infinite amenable group which acts continuously on a compact metric space X and let μ be an ergodic G-invariant Borel probability measure on X. For a fixed tempered F?lner sequence {Fn} ...Let G be a countable discrete infinite amenable group which acts continuously on a compact metric space X and let μ be an ergodic G-invariant Borel probability measure on X. For a fixed tempered F?lner sequence {Fn} in G with limn→+∞|Fn|/log n= ∞, we prove the following result:h_top^B(G_μ, {F_n}) = h_μ(X, G),where G_μ is the set of generic points for μ with respect to {F_n} and h_top^B(G_μ, {F_n}) is the Bowen topological entropy(along {F_n}) on G_μ. This generalizes the classical result of Bowen(1973).展开更多
文摘The paper reported the phenotype and allele frequency distribution of ABO and Rh(D) blood groups among Brahmin,an endogamous population from Visakhapatnam district,Andhra Pradesh,India.Blood samples of 100 unrelated Brahmin individuals were screened for ABO and Rh(D) blood groups.The order of occurrence of ABO phenotypes was O>A>B.The corresponding allele frequencies were 0.530,0.315,and 0.155,respectively.The allele frequency of D (0.990) was more than d (0.010).The results were compared with the other caste population to understand the population variations.
文摘Group size variations of the Arabian sand gazelle Gazella subgutturosa marica were studied during a period of drought at the Mahazat as-Sayd Protected Area in central western Saudi Arabia. Significant differences in median group sizes were observed between all seasons except summer. Single animals were observed mainly during summer while group sizes ex- ceeding 10 individuals were observed mainly during winter. Solitary male and female groups were typically observed during winter and mixed groups mainly during the autumn rutting period. Most mixed groups were two to four times larger during winter than summer. The adult sex ratio （male： female） for all seasons combined was in parity and highest during autumn （1：1.23）, probably as a result of prolonged drought conditions. The variability in group structure related to environmental conditions may be one factor permitting G. s. marica to adapt to hyper-arid habitats and climatic regimes in central western Saudi Arabia. The value of continuous monitoring of the gazelle population is emphasised for this drought prone region
基金supported by National Basic Research Program of China (Grant No. 2013CB834100)National Natural Science Foundation of China (Grant Nos. 11271191 and 11431012)
文摘Let G be a countable discrete infinite amenable group which acts continuously on a compact metric space X and let μ be an ergodic G-invariant Borel probability measure on X. For a fixed tempered F?lner sequence {Fn} in G with limn→+∞|Fn|/log n= ∞, we prove the following result:h_top^B(G_μ, {F_n}) = h_μ(X, G),where G_μ is the set of generic points for μ with respect to {F_n} and h_top^B(G_μ, {F_n}) is the Bowen topological entropy(along {F_n}) on G_μ. This generalizes the classical result of Bowen(1973).
