Maintaining genetic diversity is a major issue in conservation biology. In this study, we demonstrate the differences of genetic diversity levels between wild and captive individuals of Elliot’s Pheasant Syrmaticus e...Maintaining genetic diversity is a major issue in conservation biology. In this study, we demonstrate the differences of genetic diversity levels between wild and captive individuals of Elliot’s Pheasant Syrmaticus ellioti. Wild individuals showed a higher genetic diversity level than that of the captive individuals. Nucleotide diversity and haplotype diversity of wild individuals were 0.00628 and 0.993, while those of captive individuals were 0.00150 and 0.584 respectively. Only 3 haplotypes of mtDNA control region sequence were identified among 36 captive individuals, while 16 unique haplotypes were identified among the 17 wild individuals in this study. One captive haplotype was shared by a wild individual from Anhui Province. It is concluded that a low number of founders was the likely reason for the lower level genetic diversity of the captive group. Careful genetic man- agement is suggested for captive populations, particularly of such an endangered species, to maintain genetic variability levels.展开更多
To understand metabolic adaptations,the basal metabolic rate（BMR） of Mrs Hume＇s Pheasant（Syrmaticus humiae） and Elliot＇s Pheasant（Syrmaticus ellioti） were investigated.Metabolic rate（MR）,body temperature（Tb...To understand metabolic adaptations,the basal metabolic rate（BMR） of Mrs Hume＇s Pheasant（Syrmaticus humiae） and Elliot＇s Pheasant（Syrmaticus ellioti） were investigated.Metabolic rate（MR）,body temperature（Tb） and thermal conductance（C） were determined in both species at a temperatrue range of 5-35 ℃,respectively.Oxygen consumption was measured with a closed circuit respirometer.The thermal neutral zones（TNZ） were 24.5-31.6 ℃,and 23.0-29.2 ℃,respectively.With a temperature range of 5-35 ℃,Mrs Hume＇s Pheasant and Elliot＇s Pheasant could maintained stable Tb at a mean of（40.47±0.64） and（40.36±0.10） ℃,respectively.Mean BMRs within TNZs were（1.36±0.84） mLO2/（g.h） for Mrs Hume＇s Pheasant and（2.03±0.12） mLO2/（g.h） for Elliot＇s Pheasant,which were 77% and 86% of the expected value based on their body mass,respectively.Thermal conductance of Mrs Hume＇s Pheasant and Elliot＇s Pheasant were（0.12±0.01） and（0.17±0.01） mLO2/（g.h.℃）,below the lower critical temperature,respectively,which were 119% and 124% of the expected value based on their body mass,respectively.The ecophysiological characteristics of these species were low metabolic rate,high body temperature,and high thermal conductance,which allow both species to better adapt to the warmer climate environment in south China.展开更多
基金Project (No. 30170144) supported by the National Nature ScienceFoundation of China
文摘Maintaining genetic diversity is a major issue in conservation biology. In this study, we demonstrate the differences of genetic diversity levels between wild and captive individuals of Elliot’s Pheasant Syrmaticus ellioti. Wild individuals showed a higher genetic diversity level than that of the captive individuals. Nucleotide diversity and haplotype diversity of wild individuals were 0.00628 and 0.993, while those of captive individuals were 0.00150 and 0.584 respectively. Only 3 haplotypes of mtDNA control region sequence were identified among 36 captive individuals, while 16 unique haplotypes were identified among the 17 wild individuals in this study. One captive haplotype was shared by a wild individual from Anhui Province. It is concluded that a low number of founders was the likely reason for the lower level genetic diversity of the captive group. Careful genetic man- agement is suggested for captive populations, particularly of such an endangered species, to maintain genetic variability levels.
基金the National Natural Science Foundation of China (30760039)the Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)Ministry of Education, China, and the projects of Science and Technology Bureau of Yongzhou, Hunan (201019)
文摘To understand metabolic adaptations,the basal metabolic rate（BMR） of Mrs Hume＇s Pheasant（Syrmaticus humiae） and Elliot＇s Pheasant（Syrmaticus ellioti） were investigated.Metabolic rate（MR）,body temperature（Tb） and thermal conductance（C） were determined in both species at a temperatrue range of 5-35 ℃,respectively.Oxygen consumption was measured with a closed circuit respirometer.The thermal neutral zones（TNZ） were 24.5-31.6 ℃,and 23.0-29.2 ℃,respectively.With a temperature range of 5-35 ℃,Mrs Hume＇s Pheasant and Elliot＇s Pheasant could maintained stable Tb at a mean of（40.47±0.64） and（40.36±0.10） ℃,respectively.Mean BMRs within TNZs were（1.36±0.84） mLO2/（g.h） for Mrs Hume＇s Pheasant and（2.03±0.12） mLO2/（g.h） for Elliot＇s Pheasant,which were 77% and 86% of the expected value based on their body mass,respectively.Thermal conductance of Mrs Hume＇s Pheasant and Elliot＇s Pheasant were（0.12±0.01） and（0.17±0.01） mLO2/（g.h.℃）,below the lower critical temperature,respectively,which were 119% and 124% of the expected value based on their body mass,respectively.The ecophysiological characteristics of these species were low metabolic rate,high body temperature,and high thermal conductance,which allow both species to better adapt to the warmer climate environment in south China.
