Geographic Variation in the Growth of Japanese Pond Turtles, Mauremys japonica, in the Flatland and Mountain Regions of Chiba Prefecture, Japan

Kagayama, Shawichi

doi:10.5358/hsj.39.87

Current Herpetology

2020

DOI: 10.5358/hsj.39.87

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Geographic Variation in the Growth of Japanese Pond Turtles, Mauremys japonica, in the Flatland and Mountain Regions of Chiba Prefecture, Japan

Shawichi Kagayama

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Cited by 4 publications

References 24 publications

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Density-dependent unidirectional hybridization between the Japanese pond turtle, Mauremys japonica, and the exotic Reeves’ pond turtle, Mauremys reevesii, in Japan, inferred from molecular and morphological analyses

Matsuda,

Kaburagi,

Kamezaki

et al. 2024

Zoological Journal of the Linnean Society

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Hybridization between the indigenous Japanese pond turtle, Mauremys japonica, and the exotic Reeves’ pond turtle, Mauremys reevesii, is widespread in Japan. In this study, we examined this hybridization using an analysis of mtDNA and 11 microsatellite markers (MS) combined with morphometry. In a Bayesian clustering analysis of MS, the admixture of two clusters equivalent to the two species was detected in the Seto Inland Sea and Ise Bay regions. While mtDNA showed reciprocal hybridization between the two species, their hybrids tended to possess the mtDNA of the rarer species at each locality. Contrary to preceding studies, F2/later generations outnumbered F1 generations. In addition, the admixture of two mtDNA lineages (Chinese and Korean) of M. reevesii was widely observed in all regions, together with the range expansion of the recently introduced Chinese lineage. A significant correlation was observed between plastron morph and assignment probability of MS, showing that plastron morphology reflects the degree of introgression by M. reevesii in M. japonica. This finding means that the reproductive interference of the dominant species on a rarer species is a major factor driving the hybridization of the two Mauremys species. In addition, the range expansion of the Chinese lineage of M. reevesii appears to enhance the introgression by M. reevesii in M. japonica.

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Density-dependent unidirectional hybridization between the Japanese pond turtle, Mauremys japonica, and the exotic Reeves’ pond turtle, Mauremys reevesii, in Japan, inferred from molecular and morphological analyses

Matsuda,

Kaburagi,

Kamezaki

et al. 2024

Zoological Journal of the Linnean Society

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Changes in Population Structure of the Freshwater Turtle Mauremys japonica Following the Invasion of Feral Raccoon Procyon lotor in the Southern Tip of the Boso Peninsula, Japan

Kagayama

Shimofuji

Ohtake

et al. 2021

Current Herpetology

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Life History Stage and Sex-specific Survival Rates for the Japanese Pond Turtle, Mauremys japonica, in the Foothill Region of Chiba Prefecture, Japan

Kagayama

2022

Current Herpetology

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Geographic Variation in the Growth of Japanese Pond Turtles, Mauremys japonica, in the Flatland and Mountain Regions of Chiba Prefecture, Japan

Cited by 4 publications

References 24 publications

Density-dependent unidirectional hybridization between the Japanese pond turtle, Mauremys japonica, and the exotic Reeves’ pond turtle, Mauremys reevesii, in Japan, inferred from molecular and morphological analyses

Density-dependent unidirectional hybridization between the Japanese pond turtle, Mauremys japonica, and the exotic Reeves’ pond turtle, Mauremys reevesii, in Japan, inferred from molecular and morphological analyses

Changes in Population Structure of the Freshwater Turtle Mauremys japonica Following the Invasion of Feral Raccoon Procyon lotor in the Southern Tip of the Boso Peninsula, Japan

Life History Stage and Sex-specific Survival Rates for the Japanese Pond Turtle, Mauremys japonica, in the Foothill Region of Chiba Prefecture, Japan

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