論文 - 戸田　守

ヤエヤマヒバァによるヤエヤマハラブチガエルの捕食例

福山伊吹・戸田 守

Akamata ( 沖縄両生爬虫類研究会 )  ( 30 ) 7 - 9   2021年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

サキシマスジオによるヤエヤマコキクガシラコウモリの捕食例

安里 瞳・山本拓海・戸田 守

Akamata ( 沖縄両生爬虫類研究会 )  ( 30 ) 1 - 4   2021年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Phylogeography of cicadas on continental and oceanic islands in the northwestern Pacific region

Nagata N.

Journal of Biogeography ( Journal of Biogeography )  48 ( 12 ) 3060 - 3071   2021年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Addition of the Sea Snake, Hydrophis stokesii (Reptilia: Squamata: Elapidae), to the Herpetofauna of Japan

Sasai T.

Ｃｕｒｒｅｎｔ　ｈｅｒｐｅｔｏｌｏｇｙ ( 日本爬虫両棲類学会 )  40 ( 2 ) 190 - 196   2021年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

<p><i>Hydrophis stokesii</i> was collected in the coastal water of Okinawajima Island on 30 March 2021. This is the first record of the species from Japanese waters, extending its known range of occurrence toward east-northeast by more than 900 km. The snake was an adult female, 1,545 mm in snout-vent length, 203 mm in tail length, and 3,360 g in body mass. It had 11 well-developed yolked follicles in ovaries and a half-digested spiny puffer fish (<i>Diodon</i> sp.) in its stomach. This individual may possibly represent a stable population of <i>H. stokesii</i> in the Okinawan waters.</p>

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  CiNii Research

Population history and genomic admixture of sea snakes of the genus Laticauda in the West Pacific.

Kishida T, Toda M, Go Y, Tatsumoto S, Sasai T, Hikida T

Molecular phylogenetics and evolution ( Molecular Phylogenetics and Evolution )  155   107005   2021年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Visual adaptation of opsin genes to the aquatic environment in sea snakes.

Seiko T, Kishida T, Toyama M, Hariyama T, Okitsu T, Wada A, Toda M, Satta Y, Terai Y

BMC evolutionary biology ( BMC Evolutionary Biology )  20 ( 1 ) 158   2020年11月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Development of 22 Microsatellite Markers for Assessing Hybridization in the Genus Gekko (Squamata: Gekkonidae)

OKAMOTO KOTA, KURITA TAKAKI, NAGANO MASAHIRO, SATO YUKUTO, AOYAMA HIROAKI, SAITOH SEIKOH, SHINZATO NAOYA, TODA MAMORU

Current Herpetology ( 日本爬虫両棲類学会 )  39 ( 1 ) 66 - 74   2020年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

<p><i>Gekko yakuensis</i> and <i>G. tawaensis</i>, both endemic to western Japan, are threatened by genetic introgression from <i>G. hokouensis</i> and <i>G. japonicus</i>, respectively. To know detailed situation of their hybridizations for planning relevant conservation measures, development of sensitive genetic markers is desired. We here developed microsatellite markers based on the sequences obtained from <i>G. hokouensis</i> using 454 GS Junior sequencer, and tested stability of PCR amplification and species-specificity of alleles at each locus using <i>G. hokouensis</i>, <i>G. yakuensis</i>, <i>G. japonicus</i>, and <i>G. tawaensis</i>. The results showed that 22 loci were almost constantly amplified in more than one species. We further confirmed that there were fixed or nearly fixed allelic displacement between <i>G. hokouensis</i> and <i>G. yakuensis</i>, and between <i>G. japonicus</i> and <i>G. tawaensis</i> at 14 loci. Thus, these 22 loci are considered to be useful for evaluation of hybridizations between these pairs of species.</p>

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Loss of olfaction in sea snakes provides new perspectives on the aquatic adaptation of amniotes.

Kishida T, Go Y, Tatsumoto S, Tatsumi K, Kuraku S, Toda M

Proceedings. Biological sciences ( Proceedings of the Royal Society B: Biological Sciences )  286 ( 1910 ) 20191828 - 20191828   2019年09月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Marine amniotes, a polyphyletic group, provide an excellent opportunity for studying convergent evolution. Their sense of smell tends to degenerate, but this process has not been explored by comparing fully aquatic species with their amphibious relatives in an evolutionary context. Here, we sequenced the genomes of fully aquatic and amphibious sea snakes and identified repertoires of chemosensory receptor genes involved in olfaction. Snakes possess large numbers of the olfactory receptor (OR) genes and the type-2 vomeronasal receptor (V2R) genes, and expression profiling in the olfactory tissues suggests that snakes use the ORs in the main olfactory system (MOS) and the V2Rs in the vomeronasal system (VNS). The number of OR genes has decreased in sea snakes, and fully aquatic species lost MOS which is responsible for detecting airborne odours. By contrast, sea snakes including fully aquatic species retain a number of V2R genes and a well-developed VNS for smelling underwater. This study suggests that the sense of smell also degenerated in sea snakes, particularly in fully aquatic species, but their residual olfactory capability is distinct from that of other fully aquatic amniotes. Amphibious species show an intermediate status between terrestrial and fully aquatic snakes, implying their importance in understanding the process of aquatic adaptation.

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Relict distribution of Microhyla (Amphibia: Microhylidae) in the Ryukyu Archipelago: High diversity in East Asia maintained by insularization

戸田 守

Zoologica Scripta ( Zoologica Scripta )  48 ( 4 ) 440 - 453   2019年07月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Takydromus smaragdinus (Green Grass Lizard). Color polymorphism.

戸田 守

Herpetological Review   50 ( 2 ) 379 - 380   2019年06月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

ミナミヤモリの種子島からの記録

岡本康汰, 戸田守

Akamata   ( 28 ) 21 - 28   2018年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

下地島からのサキシマバイカダの初記録

和智仲是, 戸田守

Akamata   ( 28 ) 34 - 38   2018年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Body temperature of subtropical snakes at night: How cold is their blood?

Mori, A, Toda, M

Current Herpetology ( Current Herpetology )  37 ( 2 ) 151 - 157   2018年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Thermal reaction norms of locomotor performance in lacertid lizards of the genus Takydromus.

Mochida, K, Sasai, T, Kadota, Y, Nishikawa, M, Itou, M, Toda, M

Current Herpetology   37 ( 2 ) 114 - 123   2018年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Species delimitation and biogeography of the Ryukyu ground geckos, Goniurosaurus kuroiwae ssp. (Squamata: Eublepharidae), by use of mitochondrial and nuclear DNA analyses

Takaki Kurita, Masanao Honda, Mamoru Toda

Journal of Zoological Systematics and Evolutionary Research ( Blackwell Publishing Ltd )  56 ( 2 ) 209 - 222   2018年05月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

In the Ryukyu Archipelago, Japan, Goniurosaurus geckos are currently divided into six allopatric taxa among nearby islands. Recent studies suggested the occurrence of large genetic divergence within a single island and the possible non-monophyly of a few taxa, but their species delimitation is not well resolved. We investigated the taxonomic relationships between the possibly geographically overlapped, highly diverged entities as well as other island populations via dense sampling. Our mitochondrial and nuclear DNA analyses showed that the two genetic groups were distributed in parapatry within Okinawajima Island and that they were hybridizing in narrow area around the contact zone. Geohistorical evidence suggests that the restricted gene flow has been caused by some intrinsic isolation mechanisms. Thus, we conclude that the two lineages represent full species. Mitochondrial analysis also showed that the genetic differences among other island populations were comparable to those between these species, thereby suggesting the presence of seven full species, including one unnamed taxon. We also discuss the possible cause of this divergence and why it has occurred at such a fine geographic scale.

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Development of 21 polymorphic microsatellite markers for the black-banded sea krait, Laticauda semifasciata (Elapidae: Laticaudinae), and cross-species amplification for two other congeneric species.

Hyun YS, Kim IH, Song HY, Park D, Toda M, Tsai TS, An HS

Genes & genomics ( Genetics Society of Korea )  40 ( 4 ) 447 - 454   2018年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

The genus Laticauda (Reptilia: Elapidae), commonly known as sea kraits, is venomous marine amphibious snakes distributed throughout the south and southeast Asian islands and mostly found in coastal waters. To facilitate genetic studies, we have developed microsatellite loci for L. semifasciata using the 454 GS-FLX pyrosequencing technique. A total of 65,680 sequences containing a minimum of five repeat motifs were identified from 451,659 reads. Among 80 loci containing more than nine repeat units, 34 primer sets (42.5%) produced strong PCR products, of which 21 were polymorphic among 36 samples of L. semifasciata. All loci exhibited high genetic variability, with an average of 7.38 alleles per locus, and the mean observed and expected heterozygosities were 0.73 and 0.76, respectively. The cross-species amplification of these loci in two laticaudine species, L. colubrina and L. laticaudata, revealed a high transferability (78.6%) and polymorphism (59.5%) of the loci. Our work demonstrated the utility of next-generation 454 sequencing as the rapid and cost-effective method for development of microsatellite markers. The high level of polymorphism in these microsatellite loci will be useful for the detection of population subdivision and the study of migration, gene flow, relatedness and philopatry of L. semifasciata and other laticaudine species.

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住民から寄せられた目撃情報に基づくミヤコカナヘビ（爬虫綱：有隣目：カナヘビ科）の分布状況．

才木美香, 新城宗史, 久貝春陽, 戸田守

沖縄生物学会誌   ( 56 ) 1 - 10   2018年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

ホオグロヤモリのトカラ諸島宝島からの初記録

岡本康汰, 城野哲平, 太田英利, 戸田守

Akamata   ( 27 ) 47 - 51   2017年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

沖縄島における2016年の記録的大寒波のもとでのヤモリ類の観察

戸田守, 城野哲平

Akamata   ( 27 ) 7 - 12   2017年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

奄美諸島の６つの無人島の両生爬虫類相

戸田守, 角田羊平, 前之園唯史

Akamata   ( 27 ) 56 - 64   2017年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）