論文 - 戸田　守

Verification of Natural Marking for Individual Identification Using a Duplex Marking Approach in Ijima's Sea Snakes, Emydocephalus ijimae (Reptilia: Elapidae).

Yamamoto T, Nakamura T, Toda M

Zoological studies ( Zoological Studies )  61   e75   2022年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

• この論文にアクセスする

  DOI
• 関連情報を調べる
  PubMed

Comparison of morphological identification and DNA metabarcoding for dietary analysis of faeces from a subtropical lizard

Kurita T., Toda, M.

Wildlife Research ( Wildlife Research )  50 ( 3 ) 224 - 236   2022年09月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

• この論文にアクセスする

  DOI

Highly rapid and diverse sex chromosome evolution in the Odorrana frog species complex.

Katsumi T, Shams F, Yanagi H, Ohnishi T, Toda M, Lin SM, Mawaribuchi S, Shimizu N, Ezaz T, Miura I

Development, growth & differentiation ( Development Growth and Differentiation )  64 ( 6 ) 279 - 289   2022年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

• この論文にアクセスする

  DOI
• 関連情報を調べる
  PubMed

Food Habits of the Taiwan Beauty Snake, Elaphe taeniura friesi, as an Introduced Species on Okinawajima Island

Asato H.

Current Herpetology ( 日本爬虫両棲類学会 )  41 ( 2 ) 205 - 214   2022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>The Taiwan beauty snake, <i>Elaphe taeniura friesi</i>, has established a stable population in the central part of Okinawajima Island, and there are concerns about the negative effects of the snakes’ predation on the native fauna. Thus, we examined the stomachs of 239 <i>E. t. friesi</i> specimens collected on Okinawajima Island from July 2018 to November 2019. Stomach contents were identified to the species level whenever possible based on morphological observations and/or DNA analyses. Of the 239 snake specimens, 39 (12 males, 16 females, and 11 juveniles) had contents in their stomach, including 67 prey items, 75% of which were mammals (Muridae and Soricidae) and the rest of which were birds (Pycnonotidae, Cisticolidae, and Columbidae). <i>Rattus rattus</i> occurred most frequently; 25 of the 39 snakes examined had this species in their stomachs. All avian prey items detected were nestlings and eggs. Twelve snakes had multiple prey items in their stomach, including in most cases either nestlings of passerine birds or infants or subadults of <i>R. rattus</i>. Therefore, <i>E. t. friesi</i> is an endotherm consumer that occasionally preys on nestlings and infant rats. These food habits suggested that <i>E. t. friesi</i> uses various habitats, from the humus layer on the ground to the branches of trees, for foraging. Several endangered endemic rodent and bird species exist in the northern area of Okinawajima Island; thus, our results provide a warning about potential negative impact on such animals when <i>E. t. friesi</i> expands its range to the northern part of the island.</p>

• この論文にアクセスする

  DOI
• 関連情報を調べる
  CiNii Research

聞き取り調査に基づくミヤコカナヘビ（爬虫綱：有隣目）の過去の生息状況

立津槙人・神里秀美・徳嶺夏南子・徳嶺美南子・上地翔平・伊川佳那・石川作実・儀間朝宜・権田雅之・戸田守・才木美香

沖縄生物学会誌 ( 沖縄生物学会 )  ( 60 ) 1 - 10   2022年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Development and evaluation of a loop-mediated isothermal amplification (LAMP) assay for quick identification of the Japanese salamander Hynobius tokyoensis.

Suzuki T, Nishikawa K, Sato Y, Toda M

Genes & genetic systems ( 日本遺伝学会 )  96 ( 5 ) 247 - 252   2022年02月

掲載種別: 研究論文（学術雑誌）

　概要を見る

<p>Species identification using molecular techniques has recently become common for various taxa. Loop-mediated isothermal amplification (LAMP) is one of the easiest and least expensive molecular identification methods. Although few studies have developed LAMP assays for amphibians, we believe that LAMP is also useful for identifying endangered amphibians. <i>Hynobius tokyoensis</i> and <i>H. lichenatus</i> occur in Honshu, Japan, and have parapatric distributions. They are similar morphologically, especially at early developmental stages, including eggs and larvae. <i>Hynobius tokyoensis</i> has been listed as a national endangered species in Japan since 2020, and unambiguous identification of these species is therefore important for their conservation and management. In this study, we developed a LAMP primer set for the mitochondrial cytochrome b region to detect <i>H</i>. <i>tokyoensis</i>, and we evaluated the LAMP assay using total genomic DNA from four <i>H</i>. <i>tokyoensis</i> and three <i>H</i>. <i>lichenatus</i> individuals from across most of their ranges. Our LAMP primer set could distinguish these two species. This study should help to establish LAMP assays for other endangered species and morphologically similar species.</p>

• この論文にアクセスする

  DOI
• 関連情報を調べる
  PubMed CiNii Research

飼育下におけるミナミヤモリとヤクヤモリの産卵回数，産卵間隔，および貯精期間

岡本康汰・城野哲平・戸田守

Akamata ( 沖縄両生爬虫類研究会 )  ( 30 ) 21 - 25   2021年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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）

• この論文にアクセスする

  DOI

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>

• この論文にアクセスする

  DOI
• 関連情報を調べる
  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）

• この論文にアクセスする

  DOI
• 関連情報を調べる
  PubMed

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）

• この論文にアクセスする

  DOI
• 関連情報を調べる
  PubMed

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>

• この論文にアクセスする

  DOI

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）

　概要を見る

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.

• この論文にアクセスする

  DOI
• 関連情報を調べる
  PubMed

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）

• この論文にアクセスする

  DOI

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）

• この論文にアクセスする

  DOI