Genetic evaluation of population structure in white marlin (Kajikia albida): the importance of statistical power

Abstract The genetic basis of population structure in white marlin (Kajikia albida) is not well understood. Previous evaluation of genetic population structure in this species utilized a small number of molecular markers to survey genetic variation across opportunistically collected samples of adults, resulting in statistically significant levels of genetic differentiation for some pairwise comparisons and global levels of genetic differentiation that approached statistical significance. This study increased statistical power to improve resolution of genetic population structure in white marlin by surveying a larger number of molecular markers across sample collections of increased size, including collections from additional geographic locations and a robust collection of larvae. Increased statistical power resulted in lower levels of genetic heterogeneity compared with the previous study, and results were consistent with the presence of a single genetic stock of white marlin in the Atlantic Ocean. These results indicate that when statistical power is low, the ability to distinguish noise from a true signal of population structure is compromised. This relationship is especially important for population genetic assessments of marine fishes where genetic differentiation, if it exists, is expected to be low.

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The genetic population structure of lotic and lentic mayflies of theBaetis vernusgroup (Ephemeroptera: Baetidae)

The Canadian Entomologist ◽

10.4039/tce.2012.69 ◽

2012 ◽

Vol 144 (5) ◽

pp. 679-690 ◽

Cited By ~ 6

Author(s):

Marcus K. Drotz ◽

Eino Savolainen ◽

Anssi Saura ◽

Gunilla Ståhls

Keyword(s):

Population Structure ◽

Genetic Differentiation ◽

Genetic Population Structure ◽

Flowing Water ◽

Gene Frequencies ◽

Genetic Population ◽

Population Genetic Differentiation ◽

Gene Coi ◽

Population Structuring ◽

Unpredictable Environment

AbstractNymphs of lotic mayflies live in environments that are expected to give rise to different degrees of population structuring. Here we investigate two taxa adapted to different lifestyles.Baetis macaniKimmins (Ephemeroptera: Baetidae) lives in flowing water; brooks that may periodically dry out in the summer or freeze to the bottom in winter.Baetis jaerviiSavolainen is mostly found in sedge belts along the shores of lakes. Most insects living in flowing water show low levels of among-population genetic differentiation within and among catchments. Levels of differentiation in the lotic species are therefore assumed to be lower than in lenticB. jaervii. Here we test this hypothesis. Mitochondrial DNA and allele frequencies of nuclear genes were used to detect population structure in specimens originating from an extensive area from northern Finland. The genetic differentiation among populations of the loticB. macaniis more than twice the corresponding value for the lenticB. jaervii(FST0.33 versus 0.15, while the meanFSTbetween species was 0.33 and significant). The result is congruent within the cytochrome c oxidase subunit I gene (COI) partial gene frequencies. We argue that the significant genetic population structure, which only was found in the loticB. macani, is differentiated as a consequence to the unpredictable environment as contrasted to the stable environment in standing bodies of water.

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Molecular Markers and Genetic Population Structure of Pelagic Sharks

Sharks of the Open Ocean ◽

10.1002/9781444302516.ch28 ◽

2009 ◽

pp. 323-333 ◽

Cited By ~ 4

Author(s):

Edward J. Heist

Keyword(s):

Population Structure ◽

Molecular Markers ◽

Genetic Population Structure ◽

Genetic Population

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Genetic population structure ofEpinephelus marginatus(Pisces, Serranidae) revealed by two molecular markers

Italian Journal of Zoology ◽

10.1080/11250000600804599 ◽

2006 ◽

Vol 73 (3) ◽

pp. 275-283 ◽

Cited By ~ 13

Author(s):

Teresa Maggio ◽

Franco Andaloro ◽

Marco Arculeo

Keyword(s):

Population Structure ◽

Molecular Markers ◽

Genetic Population Structure ◽

Genetic Population

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Genetic diversity and population structure of razor clam Sinonovacula constricta in Ariake Bay, Japan, revealed using RAD-Seq SNP markers

10.1101/2020.10.27.358150 ◽

2020 ◽

Author(s):

Ryo Orita ◽

Yukio Nagano ◽

Yoshio Kawamura ◽

Kei Kimura ◽

Genta Kobayashi

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

Genetic Differentiation ◽

Snp Markers ◽

Genetic Population Structure ◽

Ariake Bay ◽

Genetic Population ◽

Sinonovacula Constricta ◽

Razor Clam ◽

High Level

AbstractThe razor clam Sinonovacula constricta is a commercially important bivalve in Japan. The current distribution of this species in Japan is limited to Ariake Bay, where the fishery stock is declining. It is necessary to understand the genetic population structure of this species in order to restore the fishery stock while preserving the genetic diversity of the clam. Here, we report for the first time the genetic population structure of S. constricta in Ariake Bay, Japan. Paired-end restriction site-associated DNA sequencing (RAD-Seq) analyzed samples of S. constricta collected from seven mudflats located along Ariake Bay. Two different genetic populations exist in Ariake Bay, one inhabiting wild habitats and the other inhabiting the transplanted area of artificial seedlings. Our results suggest that genetic differentiation occurred between these two populations (Fst value = 0.052), and a high level of genetic differentiation is maintained between the two groups. In the future, the two genetically distinct populations need to be available as fishery resources, while taking into account their conservation and hybridization status.

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Genetic diversity and population structure of razor clam Sinonovacula constricta in Ariake Bay, Japan, revealed using RAD-Seq SNP markers

Scientific Reports ◽

10.1038/s41598-021-87395-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ryo Orita ◽

Yukio Nagano ◽

Yoshio Kawamura ◽

Kei Kimura ◽

Genta Kobayashi

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

Genetic Differentiation ◽

Snp Markers ◽

Genetic Population Structure ◽

Ariake Bay ◽

Genetic Population ◽

Sinonovacula Constricta ◽

Razor Clam ◽

High Level

AbstractThe razor clam Sinonovacula constricta is a commercially important bivalve in Japan. The current distribution of this species in Japan is limited to Ariake Bay, where the fishery stock is declining. It is necessary to understand the genetic population structure of this species in order to restore the fishery stock while preserving the genetic diversity of the clam. Here, we report for the first time the genetic population structure of S. constricta in Ariake Bay, Japan. Paired-end restriction site-associated DNA sequencing (RAD-Seq) analyzed samples of S. constricta collected from seven mudflats located along Ariake Bay. Two different genetic populations exist in Ariake Bay, one inhabiting wild habitats and the other inhabiting the transplanted area of artificial seedlings. Our results suggest that genetic differentiation occurred between these two populations (Fst value = 0.052), and a high level of genetic differentiation is maintained between the two groups. In the future, monitoring the interbreeding status of the two genetically distinct populations and the genetic differentiation within each population is important for conserving the genetic diversity of S. constricta in Japan.

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