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Yokouchi K, Itakura H, Wakiya R, Yoshinaga T, Mochioka N, Kimura S, Kaifu K. Cumulative effects of low‐height barriers on distributions of catadromous Japanese eels in Japan. Anim Conserv 2021. [DOI: 10.1111/acv.12725] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. Yokouchi
- National Research Institute of Fisheries Science Japan Fisheries Research and Education Agency Yokohama Japan
- Center for International Collaborative Research Nagasaki University Nagasaki Japan
| | - H. Itakura
- Chesapeake Biological Laboratory University of Maryland Center for Environmental Science Solomons MD USA
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
| | - R. Wakiya
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
- Research and Development Initiative Chuo University Hachioji Japan
| | - T. Yoshinaga
- School of Marine Biosciences Kitasato University Sagamihara Japan
| | - N. Mochioka
- Faculty of Agriculture Kyushu University Fukuoka Japan
| | - S. Kimura
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
| | - K. Kaifu
- Faculty of Law Chuo University Hachioji Japan
- The Zoological Society of London London UK
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Chow S, Kurogi H, Yamamoto T, Tomoda T, Mochioka N, Shirotori F, Yoshinaga T, Ambe D, Okazaki M, Nagai S, Yanagimoto T. Reproductive isolation between sympatric Anguilla japonica and Anguilla marmorata. J Fish Biol 2017; 91:1517-1525. [PMID: 28990671 DOI: 10.1111/jfb.13483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 09/11/2017] [Indexed: 06/07/2023]
Abstract
Species-specific restriction fragment length polymorphism in the intron of the androgen receptor gene (ar5) was found in glass to silver-stage individuals of Anguilla japonica (n = 51) and A. marmorata (n = 21). The sequence analysis of 16S rDNA from 328 anguillid leptocephali collected in the North Equatorial Current of the western North Pacific Ocean revealed the specimens to be A. japonica (n = 194), A. marmorata (n = 128), A. bicolor pacifica (n = 5) and A. luzonensis (n = 1). All leptocephali of A. japonica and A. marmorata were monomorphic and did not share an allele at the ar5 locus, indicating that the two species are reproductively isolated.
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Affiliation(s)
- S Chow
- National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Yokohama, Kanagawa, 236-8648, Japan
| | - H Kurogi
- Yokosuka Laboratory, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 6-3-1, Nagai, Kanagawa, 238-0316, Japan
| | - T Yamamoto
- Yokosuka Laboratory, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 6-3-1, Nagai, Kanagawa, 238-0316, Japan
| | - T Tomoda
- National Research Institute of Aquaculture, Japan Fisheries Research and Education Agency, 205 Natsui, Shibushi, Kagoshima, 899-7101, Japan
| | - N Mochioka
- Kyushu University, 6-10-1 Hakozaki, Fukuoka, 812-8581, Japan
| | - F Shirotori
- School of Marine Biosciences, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - T Yoshinaga
- School of Marine Biosciences, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - D Ambe
- National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Yokohama, Kanagawa, 236-8648, Japan
| | - M Okazaki
- National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Yokohama, Kanagawa, 236-8648, Japan
| | - S Nagai
- National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Yokohama, Kanagawa, 236-8648, Japan
| | - T Yanagimoto
- National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Yokohama, Kanagawa, 236-8648, Japan
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Hashiguchi Y, Lee JM, Shiraishi M, Komatsu S, Miki S, Shimasaki Y, Mochioka N, Kusakabe T, Oshima Y. Characterization and evolutionary analysis of tributyltin-binding protein and pufferfish saxitoxin and tetrodotoxin-binding protein genes in toxic and nontoxic pufferfishes. J Evol Biol 2015; 28:1103-18. [PMID: 25847490 DOI: 10.1111/jeb.12634] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 03/29/2015] [Indexed: 12/20/2022]
Abstract
Understanding the evolutionary mechanisms of toxin accumulation in pufferfishes has been long-standing problem in toxicology and evolutionary biology. Pufferfish saxitoxin and tetrodotoxin-binding protein (PSTBP) is involved in the transport and accumulation of tetrodotoxin and is one of the most intriguing proteins related to the toxicity of pufferfishes. PSTBPs are fusion proteins consisting of two tandem repeated tributyltin-binding protein type 2 (TBT-bp2) domains. In this study, we examined the evolutionary dynamics of TBT-bp2 and PSTBP genes to understand the evolution of toxin accumulation in pufferfishes. Database searches and/or PCR-based cDNA cloning in nine pufferfish species (6 toxic and 3 nontoxic) revealed that all species possessed one or more TBT-bp2 genes, but PSTBP genes were found only in 5 toxic species belonging to genus Takifugu. These toxic Takifugu species possessed two or three copies of PSTBP genes. Phylogenetic analysis of TBT-bp2 and PSTBP genes suggested that PSTBPs evolved in the common ancestor of Takifugu species by repeated duplications and fusions of TBT-bp2 genes. In addition, a detailed comparison of Takifugu TBT-bp2 and PSTBP gene sequences detected a signature of positive selection under the pressure of gene conversion. The complicated evolutionary dynamics of TBT-bp2 and PSTBP genes may reflect the diversity of toxicity in pufferfishes.
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Affiliation(s)
- Y Hashiguchi
- Department of Biology, Osaka Medical College, Takatsuki, Osaka, Japan
| | - J M Lee
- Laboratory of Silkworm Science, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - M Shiraishi
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - S Komatsu
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - S Miki
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Y Shimasaki
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - N Mochioka
- Laboratory of Bioresource Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - T Kusakabe
- Laboratory of Silkworm Science, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Y Oshima
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
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