Genetic Relationship and Structural Analysis of Resident Pacific Salmon Oncorhynchus Masou in Mijiang River, China

Abstract Masu salmon Oncorhynchus masou has been listed as national second-class protected species in China, and many of its local populations have been under threats of decline because of environmental deterioration by human activity, such as habitat loss, water pollution, or dams. Genetic characteristics should be clarified in wild masu salmon population for an effective protection and recovery. In the present study, we explained genetic relationship and structure of masu salmon population in Mijaing River by sequencing the COI gene and analyzing microsatellite makers. Results of COI sequences analysis revealed 15 gene variable sites in approximately 696 bp, which defined 12 haplotypes, including some haplotypes related to geographic regions. The NJ tree indicated genetic relationship that we preliminarily inferred, that is, the masu salmon from Mijiang River belonged to the cherry salmon family (O. masoumasou). Results based on 14 microsatellite loci showed high haplotype diversity and low nucleotide diversity, indicating low genetic diversity of wild masu population in Mijaing River. The observed genetic structure was influenced primarily by bottlenecks due to overfishing and habitat loss. Since masu salmon has become highly vulnerable in China, we recommend to strengthen the protection of resident masu salmon population.

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LENGTH-WEIGHT STRUCTURES AND FECUNDITY OF ANADROMOUS MASU SALMON (ONCORHYNCHUS MASOU) FROM WESTERN KAMCHATKA

Bulletin оf Kamchatka State Technical University ◽

10.17217/2079-0333-2021-56-74-87 ◽

2021 ◽

pp. 74-87

Author(s):

O.A. Zakharova ◽

◽

S.M. Zudina ◽

Keyword(s):

Pacific Salmon ◽

Masu Salmon ◽

Oncorhynchus Masou ◽

Western Kamchatka ◽

The Pacific ◽

Northern Border ◽

Thermophilic Species ◽

Mature Fish ◽

Masu Salmon Oncorhynchus Masou ◽

Weight Structures

Masu salmon Oncorhynchus masou is the most thermophilic species among the Pacific salmon, and Kamchat-ka peninsula is the northern border of its distribution. Due to small abundance, the biology of this species on the peninsula is poorly studied. Regular scientific researches of Masu salmon in Kamchatka have been con-ducted since 2009. The length-weight structures and fecundity of mature Masu salmon have been analyzed in several streams on western Kamchatka over a 10-year period (from 2009 to 2018) and present time. It has been established that the length, weight and fecundity of mature fish are different in the rivers of the peninsula. A tendency of increasing the biological characteristic of the species in recent years has been noted.

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Juvenile masu salmon (Oncorhynchus masou) abundance and stream habitat relationships in northern Japan

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f97-036 ◽

1997 ◽

Vol 54 (6) ◽

pp. 1331-1341 ◽

Cited By ~ 44

Author(s):

Mikio Inoue ◽

Shigeru Nakano ◽

Futoshi Nakamura

Keyword(s):

Habitat Use ◽

Riparian Forest ◽

Spatial Scales ◽

Masu Salmon ◽

Stream Habitat ◽

Oncorhynchus Masou ◽

Unit Scale ◽

Salmon Population ◽

Masu Salmon Oncorhynchus Masou ◽

Channel Unit

Relationships between abundance of juvenile masu salmon (Oncorhynchus masou) and stream habitat were analyzed on two spatial scales, stream reach and channel unit, in northern Hokkaido, Japan. Reach-scale analyses revealed that high water temperatures limited the salmon population level and that the salmon abundance increased with cover availability. These two limiting factors were strongly associated with the presence of riparian forest, emphasizing its importance for the salmon population. Channel-unit scale analyses showed greater use of pools by the salmon, with greater depth and abundant cover underlying the patterns of habitat use. However, the relative importance of depth and cover varied among the reach types having different cover availability. In reaches that had abundant cover, cover itself was less important in determining patterns of habitat use within the reaches. In contrast, in reaches with poor cover, patterns of habitat use were strongly affected by cover. The results indicated that habitat characteristics at the reach scale affect not only the salmon abundance of the stream reaches, but also the determinants of local abundance patterns of the salmon within the reaches. It was suggested that larger-scale influences in a hierarchy of habitat scales should be considered for better understanding of fish-habitat relationships.

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The genetic relationships and Indo-Pacific connectivity of whale sharks (Rhincodon typus) with particular reference to mitochondrial COI gene sequences from Cendrawasih Bay, Papua, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d210544 ◽

2020 ◽

Vol 21 (5) ◽

Author(s):

Abdul Hamid A. Toha ◽

MUHAMMAD DAILAMI ◽

SAIFUL ANWAR ◽

JUSWONO B. SETIAWAN ◽

YUSUP JENTEWO ◽

...

Keyword(s):

Genetic Relationships ◽

Haplotype Diversity ◽

Nucleotide Composition ◽

Coi Gene ◽

Whale Shark ◽

Nucleotide Polymorphisms ◽

Gene Fragment ◽

Genetic Characteristics ◽

Rhincodon Typus ◽

Meat Samples

The whale shark (Rhincodon typus) inhabits Cenderawasih Bay at the Birdhead Seascape of Papua in high frequent sightings, but little is known about its genetic characteristics and connectivity. The study was conducted to characterize of the R. typus COI gene fragment from Cenderawasih Bay, in order to accurately compare with the 27 COI gene fragment sequences from the global whale shark deposited in the GenBank. A total of 28 meat samples of whale shark were collected by biopsy punch on a pole spear. The meat samples were extracted to obtain whole genome then amplified and sequenced to obtained COI nucleotides. The determined COI is a 669 bp, comprising of A = 26.5%, T/U = 30.5%, C = 28.3%, dan G = 14.7%. In total, 41 cutting sites of all the sequences ranged in size from 5-7 bp long. One COI single nucleotide polymorphisms and 2 haplotypes were identified. Single site substitution change from T to C for both haplotypes was observed. Overall, the haplotype diversity (Hd= 0.137) and nucleotide diversity (π=0.0002) were relatively low. A different nucleotide composition, number and arrangement of the sequences with the whale shark COI sequences from Cenderawasih Bay compared to COI gene fragment sequences from GenBank were observed. This study shows the availability of sequence of whale shark will contribute to aid further studies of molecular systematics, phylogeography, genetic differentiation, and conservation genetics.

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Effect of parental phenotype on dispersal, growth and maturation of offspring in wild masu salmon (Oncorhynchus masou)

Evolutionary Ecology ◽

10.1007/s10682-020-10098-2 ◽

2021 ◽

Author(s):

Toshiaki Yamamoto ◽

Shigeru Kitanishi ◽

Neil B. Metcalfe

Keyword(s):

Masu Salmon ◽

Oncorhynchus Masou ◽

Parental Phenotype ◽

Masu Salmon Oncorhynchus Masou

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Phylogeography of the Brittle Star Ophiura sarsii Lütken, 1855 (Echinodermata: Ophiuroidea) from the Barents Sea and East Atlantic

Diversity ◽

10.3390/d13020040 ◽

2021 ◽

Vol 13 (2) ◽

pp. 40

Author(s):

Evgeny Genelt-Yanovskiy ◽

Yixuan Li ◽

Ekaterina Stratanenko ◽

Natalia Zhuravleva ◽

Natalia Strelkova ◽

...

Keyword(s):

Genetic Diversity ◽

Barents Sea ◽

Haplotype Diversity ◽

Brittle Star ◽

The Arctic ◽

Coi Gene ◽

High Genetic Diversity ◽

Svalbard Archipelago ◽

Mitochondrial Coi ◽

The Barents Sea

Ophiura sarsii is a common brittle star species across the Arctic and Sub-Arctic regions of the Atlantic and the Pacific oceans. Ophiurasarsii is among the dominant echinoderms in the Barents Sea. We studied the genetic diversity of O.sarsii by sequencing the 548 bp fragment of the mitochondrial COI gene. Ophiurasarsii demonstrated high genetic diversity in the Barents Sea. Both major Atlantic mtDNA lineages were present in the Barents Sea and were evenly distributed between the northern waters around Svalbard archipelago and the southern part near Murmansk coast of Kola Peninsula. Both regions, and other parts of the O.sarsii range, were characterized by high haplotype diversity with a significant number of private haplotypes being mostly satellites to the two dominant haplotypes, each belonging to a different mtDNA clade. Demographic analyses indicated that the demographic and spatial expansion of O.sarsii in the Barents Sea most plausibly has started in the Bølling–Allerød interstadial during the deglaciation of the western margin of the Barents Sea.

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