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Rhynchocypris oxycephalus (Teleostei: Cyprinidae) is a typical small cold water fish, which is distributed widely and mainly inhabits in East Asia. Here, we sequenced and determined the complete mitochondrial genome of R. oxycephalus and studied its phylogenetic implication. R. oxycephalus mitogenome is 16,609 bp in length (GenBank accession no.: MH885043), and it contains 13 protein‐coding genes (PCGs), two rRNA genes, 22 tRNA genes, and two noncoding regions (the control region and the putative origin of light‐strand replication). 12 PCGs started with ATG, while COI used GTG as the start codon. The secondary structure of tRNA‐Ser (AGN) lacks the dihydrouracil (DHU) arm. The control region is 943bp in length, with a termination‐associated sequence, six conserved sequence blocks (CSB‐1, CSB‐2, CSB‐3, CSB‐D, CSB‐E, CSB‐F), and a repetitive sequence. Phylogenetic analysis was performed with maximum likelihood and Bayesian methods based on the concatenated nucleotide sequence of 13 PCGs and the complete sequence without control region, and the result revealed that the relationship between R. oxycephalus and R. percnurus is closest, while the relationship with R. kumgangensis is farthest. The genus Rhynchocypris is revealed as a polyphyletic group, and R. kumgangensis had distant relationship with other Rhynchocypris species. In addition, COI and ND2 genes are considered as the fittest DNA barcoding gene in genus Rhynchocypris. This work provides additional molecular information for studying R. oxycephalus conservation genetics and evolutionary relationships. [ABSTRACT FROM AUTHOR]

In this study, we sequenced and annotated the complete mitochondrial genome ofPampus argenteus(Perciformes: Stromateidae). The mitogenome is 17,098 bp in length, which contains 13 protein-coding genes, 2 rRNA genes, 23 tRNA genes and 2 non-coding regions: origin of light-strand replication (OL) and control region (D-loop). The overall nucleotide base composition ofP. argenteusmtDNA is A 30.35%, C 25.55%, G 15.28% and T 28.82%, with an A + T content of 59.17%. Except forND6gene and eight tRNA genes, all other mitochondrial genes were encoded on the heavy strand. The mitochondrial genome ofP. argenteusmay be helpful to the studies on conservation genetics and stock evaluation ofP. argenteusresource, as well as molecular phylogeny and species identification of Stromateidae. [ABSTRACT FROM AUTHOR]

Schizothorax oconnori is mainly distributed in the Yarlung Zangbo River drainage in Tibet, China. S. oconnori is assessed as least concern species in International Union for Conservation of Nature Red List. In this paper, we determined the complete mitochondrial DNA (mtDNA) sequence of S. oconnori. The mitogenome is 16,590 bp in length. It consists of 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes and 2 non-coding regions: origin of light-strand replication ( OL) and control region (D-loop). The complete mitogenome sequence information of S. oconnori can be used in the studies on molecular systematics, stock evaluation and conservation genetics and will be helpful in the development of rational management strategies and sustainable utilization for S. oconnori resource. [ABSTRACT FROM AUTHOR]

In this study, the complete mitochondrial DNA (mtDNA) sequence of Schizothorax wangchiachii has been determined. The mitogenome is 16,593 bp in length. It consists of 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and 2 non-coding regions: origin of light-strand replication (OL) and control region (D-loop). The complete mtDNA sequence of S. wangchiachii can contribute to elucidate the evolutionary mechanisms and biogeography of Schizothorax and is useful to stock evaluation and conservation genetics for S. wangchiachii. [ABSTRACT FROM AUTHOR]

In this paper, we determined complete mitochondrial DNA sequence of Schizopygopsis younghusbandi. The mitogenome is 16,674 bp in length, which includes 22 tRNA genes, 2 rRNA genes, 13 protein-coding genes, and 2 non-coding regions: control region (D-loop) and origin of light-strand replication (OL). The complete mitogenome sequence of S. younghusbandi is useful to the studies on taxonomic status, molecular systematics, stock evaluation, and conservation genetics. [ABSTRACT FROM AUTHOR]

In this study, the complete mitochondrial DNA genome sequence of Rastrelliger kanagurta has been determined. The mitogenome was 16,537 bp in length. It consists of 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and 2 non-coding regions. The A+T content of the mitochondrial genome of R. kanagurta was 52.29%, and the content was 26.92% for A, 30.67% for C, 17.03% for G, and 25.37% for T. The complete mitogenome of R. kanagurta can provide an important data for the studies on molecular systematics, species identification, stock evaluation, conservation genetics, and evolutionary adaptation mechanisms. [ABSTRACT FROM AUTHOR]

In this study, we obtained the complete mitochondrial genome sequence ofSphyraena jelloand analyzed its phylogenetic position. The complete mitogenome ofS. jellois 16 699 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, and a control region. Among the 37 genes, 28 were encoded on heavy strand, while 9 were encoded on light strand. The overall base composition was 28.97% for A, 16.14% for G, 29.64% for C, and 25.25% for T, with a higher A + T content (54.22%). The phylogenetic analysis based on 13 concatenated protein-coding genes suggested thatS. jellois a sister species toSphyraena barracudain the family Sphyraenidae. This result should be useful for understanding the genetic structure, molecular evolution, and phylogeny ofS. jelloand related species. [ABSTRACT FROM AUTHOR]

The complete mitochondrial DNA genome sequence of Ussuri catfish ( Pseudobagrus ussuriensis) was determined. The mitochondrial genome sequence is a circular molecule with 16,536 bp in length. It contains 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and 2 non-coding regions. The nucleotide acid composition of the entire mitogenome is 31.79% for A, 26.84% for T, 14.87% for G, and 26.50% for C, showing a high A+T content. The complete mitogenome sequence of P. ussuriensis can be used in the studies on molecular systematics, conservation genetics, and stock evaluation. [ABSTRACT FROM AUTHOR]