Redescription of (Nichols, 1926) with the description of a new species of the genus (Cypriniformes, Gobionidae) from southern China.

Although (Nichols, 1926) has been treated valid since it was described, its morphology remains vague, especially when comparing it with another similar species, (Yao & Yang, 1977). In this study, the types of both species were examined and also compared with several lots of specimens from a wide geographical range: there is no significant difference in morphology between them. Additionally, molecular evidence supported by mitochondrial gene sequence also showed low genetic distance in between.

Recruitment Patterns and Environmental Sensitivity of Glass Eels of in the Yangtze Estuary, China.

The decline of Japanese eel () populations in the Yangtze River estuary represents a critical conservation concern. Eleven-years of daily catch data during recruitment periods (i.e.

Resolving phylogenetic relationships and taxonomic revision in the Pseudogastromyzon (Cypriniformes, Gastromyzonidae) genus: molecular and morphological evidence for a new genus, Labigastromyzon.

The Pseudogastromyzon genus, consisting of species predominantly distributed throughout southeastern China, has garnered increasing market attention in recent years due to its ornamental appeal. However, the overlapping diagnostic attributes render the commonly accepted criteria for interspecific identification unreliable, leaving the phylogenetic relationships among Pseudogastromyzon species unexplored. In the present study, we undertake molecular phylogenetic and morphological examinations of the Pseudogastromyzon genus.

Revalidation and redescription of Sarcocheilichthys sciistius (Abbott, 1901) (Cypriniformes: Cyprinidae) from the northern China.

Sarcocheilichthys sciistius was originally described by Abbott in 1901. It was considered as a synonym of S. nigripinnis by later researchers.

Blubber fatty acid compositions in different geographic populations of finless porpoise in Chinese waters: implications for thermal adaptation.

The stratification of blubber fatty acids (FAs) is a widely used strategy in marine mammals and can be influenced by many factors, including their diet, environmental temperature, and physiological status. There are 3 distinct finless porpoise species/subspecies in Chinese coastal and inland waters in a wide range from 20°N to 40°N. The biochemical stratification of the blubbers of finless porpoises in different regions may provide valuable information for understanding their environmental adaptations.

Integrated analysis of blood mRNAs and microRNAs reveals immune changes with age in the Yangtze finless porpoise (Neophocaena asiaeorientalis).

Populations of Yangtze finless porpoises (YFPs) have rapidly declined in recent decades, raising the specter of extinction. In order to protect YFPs, a greater understanding of their biology is needed, including studying how their immune functioning changes with age. Here, we systematically studied the hematologic and biochemical parameters, as well as mRNAs and miRNAs profiles of old, adult, and young YFPs.

Chromosome-level genome assembly of the endangered humphead wrasse Cheilinus undulatus: Insight into the expansion of opsin genes in fishes.

Wrasses are dominant components of major coral reef systems. Among wrasses, Cheilinus undulatus is an endangered species with high economic and ecological value that exhibits sex reversal of females to males, while sexual selection occurs in breeding aggregations. However, the molecular-associated mechanism underlying this remains unclear.

Complete mitochondrial genome of Iniistius trivittatus and unique variation in two observed inserts between rRNA and tRNA genes in wrasses.

Background: The family Labridae made up of 519 species in the world. The functional evolution of the feeding-related jaws leaded to differentiation of species, and the pharyngeal jaw apparatus evolved independently, but evolutionary mechanism still remain unaddressed in wrasses. Mitogenomes data can be used to infer genetic diversification and investigate evolutionary history of wrasses, whereas only eight complete mitogenomes in this family have been sequenced to date.

Genetic diversity and structure of the Chinese lake gudgeon ().

Mitochondrial DNA cytochrome and d-loop sequences (2,137 bp) in 65 specimens of from five populations were identified as two lineages (I and II). The pairwise genetic distance between lineages I and II was 1.94%.

SINE Retrotransposon variation drives Ecotypic disparity in natural populations of .

Background: SINEs are a type of nonautonomous retrotransposon that can transpose from one site to be integrated elsewhere in an organism genome. SINE insertion can give rise to genetic variants and regulate gene expression, allowing organisms to acquire new adaptive capacity. Studies on this subject have focused on the impacts of SINEs on genes.

Identification of olfactory receptor genes in the Japanese grenadier anchovy .

Olfaction is essential for fish to detect odorant elements in the environment and plays a critical role in navigating, locating food and detecting predators. Olfactory function is produced by the olfactory transduction pathway and is activated by olfactory receptors (ORs) through the binding of odorant elements. Recently, four types of olfactory receptors have been identified in vertebrate olfactory epithelium, including main odorant receptors (MORs), vomeronasal type receptors (VRs), trace-amine associated receptors (TAARs) and formyl peptide receptors (FPRs).

Complete mitochondrial DNA sequence of (Anguilliformes: Ophichthidae).

belongs to the family Ophichthidae, the complete mitochondrial genome of which was sequenced in this study. The mitochondrial genome of is of 17,818 bp in length, with overall base composition of 32.11% A, 24.

Complete mitochondrial genome of (Anguilliformes: Ophichthidae).

The complete mitochondrial genome of was sequenced in this study. The genome sequence is 17,785 bp in length, comprising 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and 2 control regions. Overall base composition is 30.

New insights on geographical/ecological populations within Coilia nasus (Clupeiformes: Engraulidae) based on mitochondrial DNA and microsatellites.

The Coilia nasus is an important fish species, which is of commercial values in China. In order to manage the fisheries resources and the development of sustainable fishing strategies to protect this species, 11 microsatellite loci polymorphisms and mtDNA COI sequences were used to examine the genetic diversity of C. nasus in Japan and China.

Complete mitochondrial DNA sequence of (Osteichthyes: Gastromyzontidae).

belonging to the family Gastromyzontidae is a good model for phylogeny and zoogeography research. In the present paper, the sequenced mitochondrial genome of is of 16573 bp in length, and encodes 13 typical protein-coding genes, two ribosomal RNA genes, 22 transfer RNA genes, and one control region. The result of phylogenetic analysis demonstrates that is close to that of .

Spatial genetic structure of the cyprinid fish Onychostoma lepturum on Hainan Island.

Population genetic structure of Onychostoma lepturum on Hainan Island was investigated based on mitochondrial CR + cyt b region in 63 specimens collected from four populations. Population analyses indicated significant genetic structure (F = 0.749) and displayed a significant relationship between phylogeny and geography (N = 0.

Complete mitochondrial genome of (Osteichthyes: Gastromyzontidae).

belonging to the family Gastromyzontidae is a good model for phylogeny and zoogeography research. The complete mitochondrial genome of was sequenced in this study. The genome sequence is 16,563 bp in length, comprising 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and one control region.

The complete mitochondrial genome of the Neophocaena asiaeorientails sunamrei (Phocaenidae: Neophocaena).

The complete sequence of the mitochondrial DNA (mtDNA) of the East Asian finless porpoise (Neophocaena asiaeorientails sunamrei) has been completed and annotated in this study. The circular genome is 16 385 bp in length, consisting of 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and 2 non-coding areas. Ten protein-coding genes use ATG as the initiation codon, except that ND2 started with ATT, and ND3 and ND5 started with ATA.

The population history of Garra orientalis (Teleostei: Cyprinidae) using mitochondrial DNA and microsatellite data with approximate Bayesian computation.

Background: The South China landmass has been characterized by a complex geological history, including mountain lifting, climate changes, and river capture/reversal events. To determine how this complexity has influenced the landmass's phylogeography, our study examined the phylogeography of Garra orientalis, a cyprinid widely distributed in South China, using sequences from the mitochondrial DNA control region and cytochrome b gene (1887 bp) and polymorphisms of thirteen microsatellite loci.

Results: In total, 157 specimens were collected from eight populations.

De novo transcriptomes of olfactory epithelium reveal the genes and pathways for spawning migration in japanese grenadier anchovy (Coilia nasus).

Background: Coilia nasus (Japanese grenadier anchovy) undergoes spawning migration from the ocean to fresh water inland. Previous studies have suggested that anadromous fish use olfactory cues to perform successful migration to spawn. However, limited genomic information is available for C.

The complete mitogenome of the oriental sucking barb, Garra orientalis (Cypriniformes, Cyprinidae): repetitive sequences in the control region.

The oriental sucking barb, Garra orientalis, is a small to moderate-sized freshwater fish. In this study, the complete mitochondrial genome of G. oriental was successfully sequenced for the first time with total length of 17,288 bp.

[Review on taxonomical studies of Chinese inland-water fish].

We reviewed the taxonomy and systematics research history of freshwater fish in China based on 1 236 taxonomic literature records on Chinese freshwater fish. The research was divided into five research periods according to specific historical events: (1) period by foreign scholars, (2) period with Chinese scholars, (3) period during World War II and Civil War, (4) recovery period and (5) period of rapid development. There were representative studies and innovations in all periods.

The complete mitochondrial genome sequence of Sarcocheilichthys nigripinnis (Cypriniformes, Cyprinidae).

We determined the complete mitochondrial genome (mitogenome) sequence of Sarcocheilichthys nigripinnis by using long polymerase chain reaction method. The total length of S. nigripinnis mitogenome is 16,680 bp, including 13 protein-coding genes, 22 transfer RNAs, 2 ribosomal RNAs, and a noncoding control region.