Triplophysa yajiangensis sp. nov. is described from the upper and middle reaches of the Yalong River, Yangtze Basin, Ganzi Prefecture, Sichuan Province China. This new species can be distinguished from other congeneri...Triplophysa yajiangensis sp. nov. is described from the upper and middle reaches of the Yalong River, Yangtze Basin, Ganzi Prefecture, Sichuan Province China. This new species can be distinguished from other congeneric species by the following characters： body surface smooth and scaleless; lateral line complete; caudal peduncle compressed and tapered slightly; lower jaw shovel-shaped; head shorter than caudal peduncle; dorsal-fin origin anterior to pelvic-fin origin and closer to tip of snout than to caudal-fin base, last unbranched ray hard; pelvic-fin reaches or exceeds anus; posterior chamber of gas bladder absent; intestine spiral type with 3-5 winding coils.展开更多
DEAR EDITOR,High mountainous terrains facilitate the diversification of biota by providing a variety of opportunities for isolation(Favre et al.,2015).Within the Nemacheilidae family of loaches,the highly diverse Nema...DEAR EDITOR,High mountainous terrains facilitate the diversification of biota by providing a variety of opportunities for isolation(Favre et al.,2015).Within the Nemacheilidae family of loaches,the highly diverse Nemacheilini tribe is a polyphyletic group,with extensive distribution across the Indian and Eurasian plates(Chen et al.,2019;Sgouros et al.,2019).展开更多
The Cypriniformes comprise approximately 4,200 species accounting for 25% of the diversity of all freshwater fish, which is widely distributed across the world's continents except Antarctica, South America, and Au...The Cypriniformes comprise approximately 4,200 species accounting for 25% of the diversity of all freshwater fish, which is widely distributed across the world's continents except Antarctica, South America, and Australia. The highest species diversity is found in Southeastern Asia. Despite its remarkable species diversity and broad-scale geographic patterns of distribution, the evolutionary history of this major freshwater fish group remains largely unresolved. To gain insight of the evolutionary history of Cypriniformes, we present a phylogeny of this group using 1 mitochondrial gene and 15 nuclear genes comprising a total of14,061 bp. Bayesian inference using all gene fragments yielded a well resolved phylogeny, which is mostly consistent with topologies obtained from Maximum Likelihood analyses. Our results further confirmed the monophyly of Cypriniformes and seven constituent subclades including Cyprinidae, Catostomidae, Gyrinocheilidae, Balitoridae, Cobitidae, Nemacheilidae, and Botiidae. Bayesian divergence time analysis indicated that the origin of the Cypriniformes was about 193 Mya during the early Jurassic, coinciding with the onset of the Pangaea breakup. The basal divergence of Cypriniformes is 154 Mya during the late Jurassic. Our findings from molecular divergence and biogeographical analysis indicate the most likely initial geographical range of the ancient Cypriniformes was both East and South Asia(Southeastern area of Mesozoic Laurasia). Moreover, the burst in species diversity in Cyprinidae afforded by the nearly worldwide colonization is possibly in response to the plasticity of pharyngeal dentition. The present study demonstrates that the Cypriniformes was about 193 Mya during the early Jurassic,coinciding with the onset of the Pangaea breakup. The plasticity of pharyngeal dentition of cyprinids might contribute to the burst and radiation of this lineage. The phylogenetic and biogeographic analyses in this study help to improve our understanding of the evolutionary history of this diverse and important freshwater fish group.展开更多
Prof.Zhang Yaping’s laboratory at the School of Life Sciences,Yunnan University,and Kunming Institute of Zoology,Chinese Academy of Sciences,reported Biogeography and recurrent polyploidization on goldfish,which was ...Prof.Zhang Yaping’s laboratory at the School of Life Sciences,Yunnan University,and Kunming Institute of Zoology,Chinese Academy of Sciences,reported Biogeography and recurrent polyploidization on goldfish,which was published in J Biogeography(2012,39:2264—2278)and Heredity(2014,112:415—427).Goldfish of the Carassius auratus complex is of special interest,which lies in two aspects:its wide展开更多
Dam removal is becoming an effective approach for aquatic biodiversity restoration in damming river in order to balance the aquatic ecosystem conservation with large-scale cascade damming. However, the effects of dam ...Dam removal is becoming an effective approach for aquatic biodiversity restoration in damming river in order to balance the aquatic ecosystem conservation with large-scale cascade damming. However, the effects of dam removal on fish communities in Asian mountainous rivers, which are dominated by Cypriniformes fishes, are still not well known. To determine whether dam removal on a mountainous river benefit restoration of fish diversity, we investigated the response of fish assemblage to dam removal using a before-after-control-impact design in two tributaries of the Lancang River(dam removal river: the Jidu River, and control river: the Fengdian River). Fish surveys were conducted one year prior to dam removal(2012) and three years(2013–2015) following dam removal. We observed rapidly and notably spatio-temporal changes in fish biodiversity metrics and assemblage structure, occurring in the Jidu River within the first year after dam removal. Overall, fish species richness, density and Shannon-Wiener diversity all increased immediately in above-and below-dam sites, and maintained a stable level in subsequent years, compared to unchanged situation in the control river. All sites in the Jidu River experienced shifts in fish composition after dam removal, with the greatest temporal changes occurred in sites below-and above-the former dam, resulting in a temporal homogenization tendency in the dam removed river. These findings suggest that dam removal can benefit the recovery of habitat conditions and fish community in Asian mountainous rivers, but the results should be further evaluated when apply to other dammed rivers since the dam age, fluvial geomorphology and situation of source populations could all affect the responses of fish assemblages.展开更多
淇河鲫是河南省特有的名贵土著鱼类,凭借其独有的"双背"外形和营养美味而深受消费者青睐,走俏市场。河南省大力推广无公害淇河鲫高效养殖,旨在发挥特色水产优势,促进渔民增收,丰富"菜篮子",同时更好地对淇河鲫鱼资...淇河鲫是河南省特有的名贵土著鱼类,凭借其独有的"双背"外形和营养美味而深受消费者青睐,走俏市场。河南省大力推广无公害淇河鲫高效养殖,旨在发挥特色水产优势,促进渔民增收,丰富"菜篮子",同时更好地对淇河鲫鱼资源进行保护和商业开发。1淇河鲫的生物学简介淇河鲫(Carassius auratus in Qihe river)属鲤形目(Cypriniformes)鲤科(Cyprinidae)鲤亚科(Cyprini-dae),展开更多
基金support by the Open Research Fund of Laboratory of Sichuan Academy of Forestry(2015016)
文摘Triplophysa yajiangensis sp. nov. is described from the upper and middle reaches of the Yalong River, Yangtze Basin, Ganzi Prefecture, Sichuan Province China. This new species can be distinguished from other congeneric species by the following characters： body surface smooth and scaleless; lateral line complete; caudal peduncle compressed and tapered slightly; lower jaw shovel-shaped; head shorter than caudal peduncle; dorsal-fin origin anterior to pelvic-fin origin and closer to tip of snout than to caudal-fin base, last unbranched ray hard; pelvic-fin reaches or exceeds anus; posterior chamber of gas bladder absent; intestine spiral type with 3-5 winding coils.
基金supported by the National Natural Science Foundation of China (31872202,31401956,31272275)Southeast Asia Biodiversity Research Institute,Chinese Academy of Sciences (Y4ZK111B01)。
文摘DEAR EDITOR,High mountainous terrains facilitate the diversification of biota by providing a variety of opportunities for isolation(Favre et al.,2015).Within the Nemacheilidae family of loaches,the highly diverse Nemacheilini tribe is a polyphyletic group,with extensive distribution across the Indian and Eurasian plates(Chen et al.,2019;Sgouros et al.,2019).
基金supported by the Pilot projects(XDB13020100)the National Natural Science Foundation of China(31372190,91131014,31502147)the Fundamental Research Funds for the Central Universities(Ministry of Education of China)(XDJK2018B025)
文摘The Cypriniformes comprise approximately 4,200 species accounting for 25% of the diversity of all freshwater fish, which is widely distributed across the world's continents except Antarctica, South America, and Australia. The highest species diversity is found in Southeastern Asia. Despite its remarkable species diversity and broad-scale geographic patterns of distribution, the evolutionary history of this major freshwater fish group remains largely unresolved. To gain insight of the evolutionary history of Cypriniformes, we present a phylogeny of this group using 1 mitochondrial gene and 15 nuclear genes comprising a total of14,061 bp. Bayesian inference using all gene fragments yielded a well resolved phylogeny, which is mostly consistent with topologies obtained from Maximum Likelihood analyses. Our results further confirmed the monophyly of Cypriniformes and seven constituent subclades including Cyprinidae, Catostomidae, Gyrinocheilidae, Balitoridae, Cobitidae, Nemacheilidae, and Botiidae. Bayesian divergence time analysis indicated that the origin of the Cypriniformes was about 193 Mya during the early Jurassic, coinciding with the onset of the Pangaea breakup. The basal divergence of Cypriniformes is 154 Mya during the late Jurassic. Our findings from molecular divergence and biogeographical analysis indicate the most likely initial geographical range of the ancient Cypriniformes was both East and South Asia(Southeastern area of Mesozoic Laurasia). Moreover, the burst in species diversity in Cyprinidae afforded by the nearly worldwide colonization is possibly in response to the plasticity of pharyngeal dentition. The present study demonstrates that the Cypriniformes was about 193 Mya during the early Jurassic,coinciding with the onset of the Pangaea breakup. The plasticity of pharyngeal dentition of cyprinids might contribute to the burst and radiation of this lineage. The phylogenetic and biogeographic analyses in this study help to improve our understanding of the evolutionary history of this diverse and important freshwater fish group.
基金support by the National Natural Science Foundation of China(Grant Nos.31360514 and30600065)
文摘Prof.Zhang Yaping’s laboratory at the School of Life Sciences,Yunnan University,and Kunming Institute of Zoology,Chinese Academy of Sciences,reported Biogeography and recurrent polyploidization on goldfish,which was published in J Biogeography(2012,39:2264—2278)and Heredity(2014,112:415—427).Goldfish of the Carassius auratus complex is of special interest,which lies in two aspects:its wide
基金the National Natural Science Foundation of China(No.41501574)the National Key Research and Development Program of China(No.2016YFA0601601)+1 种基金the Yunnan Applied Basic Research Projects(No.2016FB079)the National Science and Technology Support Program of China(No.2013BAB06B03)
文摘Dam removal is becoming an effective approach for aquatic biodiversity restoration in damming river in order to balance the aquatic ecosystem conservation with large-scale cascade damming. However, the effects of dam removal on fish communities in Asian mountainous rivers, which are dominated by Cypriniformes fishes, are still not well known. To determine whether dam removal on a mountainous river benefit restoration of fish diversity, we investigated the response of fish assemblage to dam removal using a before-after-control-impact design in two tributaries of the Lancang River(dam removal river: the Jidu River, and control river: the Fengdian River). Fish surveys were conducted one year prior to dam removal(2012) and three years(2013–2015) following dam removal. We observed rapidly and notably spatio-temporal changes in fish biodiversity metrics and assemblage structure, occurring in the Jidu River within the first year after dam removal. Overall, fish species richness, density and Shannon-Wiener diversity all increased immediately in above-and below-dam sites, and maintained a stable level in subsequent years, compared to unchanged situation in the control river. All sites in the Jidu River experienced shifts in fish composition after dam removal, with the greatest temporal changes occurred in sites below-and above-the former dam, resulting in a temporal homogenization tendency in the dam removed river. These findings suggest that dam removal can benefit the recovery of habitat conditions and fish community in Asian mountainous rivers, but the results should be further evaluated when apply to other dammed rivers since the dam age, fluvial geomorphology and situation of source populations could all affect the responses of fish assemblages.
文摘淇河鲫是河南省特有的名贵土著鱼类,凭借其独有的"双背"外形和营养美味而深受消费者青睐,走俏市场。河南省大力推广无公害淇河鲫高效养殖,旨在发挥特色水产优势,促进渔民增收,丰富"菜篮子",同时更好地对淇河鲫鱼资源进行保护和商业开发。1淇河鲫的生物学简介淇河鲫(Carassius auratus in Qihe river)属鲤形目(Cypriniformes)鲤科(Cyprinidae)鲤亚科(Cyprini-dae),
