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2018—2021年，对长白山区中华秋沙鸭（Mergus squamatus）繁殖流域的富尔河、古洞河、头道白河开展鱼类资源调查，同时记录中华秋沙鸭繁殖情况，并分析鱼类生物量和中华秋沙鸭雌鸟和幼鸟数量的相关性。结果表明：3条河流鱼类生物量由高到低依次是头道白河、古洞河和富尔河；种类由多到少依次是古洞河、富尔河和头道白河。中华秋沙鸭雌鸟（Pearson r=0.279*，P=0.026）和幼鸟数量（Pearson r=0.255*，P=0.042）与鱼类总重量显著相关；中华秋沙鸭幼鸟数量与鱼类鲜重（均值）显著相关（tau-b r=-0.156*，P=0.042<0.05；Spearman r=-0.223*，P=0.038<0.05）；鱼类个体数与中华秋沙鸭数量无显著相关。调查结果可为中华秋沙鸭繁殖流域鱼类资源管理和中华秋沙鸭种群保护提供科学依据。

Six main mitochondrial DNA （mtDNA） lineages have been described in minnow （Zacco platypus） samples obtained from northern, western and southern China Perdices et al. （2004） predicted that further sampling of other tributaries might discover more lineages of this species. In this study, we collected 26 Zacco platypus individuals in the Huangshan area of eastern China and determined the cytochrome b （cytb） sequence variations. Combined with reported data in GenBank, we identified ten matrilines （Zacco A-J） in a total of 169 samples, with relatively high molecular divergence found among them. The Huangshan population had the greatest genetic variation among all sampled regions and hosted six of the ten matrilines. Our results highlight the significance of the Huangshan area for the conservation of Zacco platypus.

Triplophysa daochengensis sp. nov. is described from the Daocheng River, a northern tributary of the Jinsha River in Sichuan Province, China. The new species can be distinguished from its congeners by the following characters： body smooth and scales absent; lateral line complete; caudal peduncle compressed, depth unchanging; head length equal to caudal-peduncle length; lower jaw shovel-shaped; dorsal-fin origin anterior to pelvic-fin origin and closer to the tip of the snout than to the caudal-fin base, last unbranched ray hard; pelvic-fin tip not reaching anus; posterior chamber of gas bladder absent; intestine of spiral type with three winding coils.

With support from many authors from many different scientific fields,Zoological Research（ZR）successfully released eight special issues from 2011 to 2014 on various topics,including Animal Ecology and Resources,Animal Genetic Diversity,Development and Evolution,Fish Diversity and Primates and Animal Models of Human Diseases.These special issues strongly align with our aims and scope,

In this study, six fish species of five families are reported for the first time from Yunnan Province, China. The nemacheilid Schistura arnplizona Kottelat, 2000 is reported from the Luosuojiang River and Nanlahe River subbasins, Mekong basin; the prochilodontid Prochilodus lineatus （Valenciennes, 1837）, the balitorid Vanmanenia serrilineata Kottelat, 2000, and the tetraodontid Monotrete turgidus Kottelat, 2000, from Nanlahe River subbasin, Mekong basin; the balitorid Beaz~fortia daon （Mai, 1978）, and the belonid Xenentodon canciloides （Bleeker, 1854）, both, from Black River subbasin, Red River basin. The freshwater puffer M. turgidus and the needlefish ,E canciloides have been previously misidentified as Tettraodon leiurus （Bleeker, 1950） and Tylosurus strongylurus （van Hasselt, 1823）, respectively.

The grass carp （Ctenopharyngodon idella） is one of the most important cultivated fish species in China. Mounting evidences suggests that microRNAs （miRNAs） may be key regulators of skeletal muscle among the grass carp, but the knowledge of the identity of myogenic miRNAs and role of miRNAs during skeletal muscle anabolic state remains limited. In the present study, we choose 8 miRNAs previously reported to act as muscle growth-related miRNAs for fasting-refeeding research. We investigated postprandial changes in the expression of 8 miRNAs following a single satiating meal in grass carp juveniles who had been fasting for one week and found that 7 miRNAs were sharply up-regulated within 1 or 3 h after refeeding, suggesting that they may be promising candidate miRNAs involved in a fast-response signaling system that regulates fish skeletal muscle growth.

An ichthyofaunistic survey of Mekong tributaries in Lincang Prefecture, Yunnan Province, China yielded a new species of nemacheilid loach, herein described as Schistura sexnubes species nova. The new species is readily distinguishable from its congeners by the following combination of characters： 8＋8 branched caudal fin rays, an incomplete lateral line, a dissociated caudal bar, a shallow caudal peduncle depth （7.6%-9.6% SL; respectively caudal peduncle 1.76-1.95 times longer than deep）, a diminutive size of less than 50 mm SL, and no sexual dimorphism. A dorsocephalic pattern consisting of a black, forward directed V-shaped formation located between the nares, and a white, ovoid blotch on the upper operculum serves as an autapomorphy.

Using seasonally collected data （2009-2010） from 15 sampling sites that represent first- to fifth-order streams within the Qingyi watershed, we examined the spatio-temporal patterns of fish assemblages along two longitudinal gradients to explore the effects of a large dam on fish assemblages at the watershed scale. No significant variation was observed in either species richness or assemblage structure across seasons. Species richness significantly varied according to stream order and gradient. Dam construction appeared to decrease species richness upstream substantially, while a significant decrease between gradients only occurred within fourth-order streams. Along the gradient without the large dam, fish assemblage structures presented distinct separation between two neighboring stream orders, with the exception of fourth-order versus fifth-order streams. However, the gradient disrupted by a large dam displayed the opposite pattern in the spatial variation of fish assemblages related with stream orders. Sig

Aquaculture has made an enormous contribution to the world food production, especially to the sustainable supply of animal proteins. The utility of diverse reproduction strategies in fish, such as the exploiting use of unisexual gynogenesis, has created a typical case of fish genetic breeding. A number of fish species show substantial sexual dimorphism that is closely linked to multiple economic traits including growth rate and body size, and the efficient development of sex-linked genetic markers and sex control biotechnologies has provided significant approaches to increase the production and value for commercial purposes. Along with the rapid development of genomics and molecular genetic techniques, the genetic basis of sexual dimorphism has been gradually deciphered, and great progress has been made in the mechanisms of fish sex determination and identification of sex-determining genes. This review summarizes the progress to provide some directive and objective thinking for further re- search in this field.

The organization of the brain serotonergic system appears to have been highly conserved across the vertebrate subphylum. In fish as well as in other vertebrates, brain serotonin （5-HT）, mainly acts as a neuromodulator with complex effects on multiple functions. It is becoming increasingly clear that acute and chronic increase in brain 5-HT neurotransmission have very different effects. An acute 5-HT activation, which is seen in both winners and losers of agonistic interactions, could be related to a general arousal effect, whereas the chronic activation observed in subordinate fish is clearly linked to the behavioral inhibition displayed by these individuals. Fish displaying diver- gent stress coping styles （proactive vs. reactive） differ in 5-HT functions. In teleost fish, brain monoaminergic function is also related to life history traits.