論文 - 戸田　守

Cold Tolerance Variation in Local Populations of Hemidactylus frenatus: Acclimation or Adaptation?

Tao SD, Toda M

Zoological science   42 ( 2 ) 171 - 177   2025年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Dietary variation and seasonal changes in the fish egg eating specialist, <i>Emydocephalus ijimae</i> (Squamata: Reptilia) in mid-latitude coral reefs

Yamamoto, T; Toda, M

CORAL REEFS ( Coral Reefs )  44 ( 2 ) 451 - 466   2025年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Microhabitat Use by the Invasive Green Anole,<i> Anolis</i><i> carolinensis,</i> and Native Lizards on Zamami-jima Island, Ryukyu Archipelago, Japan

Kobayashi, S; Otsuka, T; Toda, M

CURRENT HERPETOLOGY ( 日本爬虫両棲類学会 )  44 ( 1 ) 24 - 36   2025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>This study aimed to clarify microhabitat use by the invasive green anole, <i>Anolis carolinensis</i> and four native lizard species on Zamami-jima Island, Japan. Daytime and nighttime field surveys were conducted at sites with (GAP) and without <i>A. carolinensis</i> (GAA). At the GAP sites daytime use of plant species, substrates and perch height by <i>A. carolinensis</i> differed from native lizards, whereas the parts of plants used by <i>A. carolinensis</i> were similar to those used by native lizards. The perch substrate types (plant parts, ground or artificial substrates) used by native lizards during the daytime differed slightly between the GAP and GAA areas. During the night, the resting plant species used by <i>A. carolinensis</i> differed from those used by the native lizards at the GAP area, although the plant parts and height above ground were similar to those used by the native lizards at the GAP area. In particular, <i>Takydromus smaragdinus</i> used <i>Pennisetum purpureum</i> leaves at a high frequency as a resting place in the GAA area. In contrast in the GAP area <i>T. smaragdinus</i> was never found resting on <i>P. purpureum</i> leaves while 77% of <i>A. carolinensis</i> were found resting on <i>P. purpureum</i>. These findings suggest that the overlap of microhabitats between <i>A. carolinensis</i> and native lizards is small during the daytime, but that this invasive lizard species influences the selection of resting sites by <i>T. smaragdinus</i>. Further studies are required to understand how <i>A. carolinensis</i> may exclude <i>T. smaragdinus</i> from resting sites.</p>

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The first record of the littoral skink Emoia atrocostata preying on a marine fish, the pearlyspot blenny Praealticus margaritarius

Yamamoto T.

Herpetological Bulletin ( Herpetological Bulletin )  ( 169 ) 47 - 48   2024年09月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Examination of sequence variations in partial mitochondrial 12S gene amongst damselfish species as references for DNA barcoding

Yamamoto, T; Tachihara, K; Toda, M

BIODIVERSITY DATA JOURNAL ( Biodiversity Data Journal )  12   e126744   2024年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Precocious maturation and semi-multivoltine lifecycle in a subtropical grass lizard, Takydromus toyamai

Asato, H; Toda, M

CURRENT ZOOLOGY     2024年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Population Status of Three Endangered Lizards on Shimojijima Island and Irabujima Island, Ryukyu Archipelago, Japan

Asato, H; Sasai, T; Yamamoto, T; Toda, M

CURRENT HERPETOLOGY ( 日本爬虫両棲類学会 )  43 ( 2 ) 159 - 168   2024年08月

掲載種別: 研究論文（学術雑誌）

　概要を見る

<p>The introduced Japanese weasel, <i>Mustela itatsi</i>, has had a significant negative impact on indigenous terrestrial vertebrates across several islands in the Miyako Group. The present study aimed to assess the current population status of squamate reptiles by investigating the distributions and abundances of three endangered lizards, <i>Plestiodon kishinouyei</i>, <i>Takydromus toyamai</i>, and <i>Emoia atrocostata atrocostata</i>, on Shimojijima Island and Irabujima Island. Route censuses for these species were conducted in the periods from 30 July to 4 August and 8–13 October 2022. Additionally, opportunistic sightings of lizards outside of the designated censuses were recorded. Eight <i>P. kishinouyei</i>, 20 <i>T. toyamai</i>, and seven <i>E. a. atrocostata</i> were recorded along four out of 101 survey routes, six out of 76, and two out of 39, respectively, with one additional <i>E. a. atrocostata</i> sighting at a non-census site. <i>Plestiodon kishinouyei</i> and <i>E. a. atrocostata</i> exhibited highly restricted distribution: the former was exclusively found in the northwestern part of Shimojijima Island, whereas the latter was confined to the southwestern part, with no presence on Irabujima Island. <i>Takydromus toyamai</i> was observed on both Shimojijima Island and Irabujima Island. The frequency of occurrence was low for the two skink populations on Shimojijima Island and <i>T. toyamai</i> on Irabujima Island, suggesting a potential population decline. These findings provide baseline data on the population status of these three lizard species. Such data will be crucial for evaluating their prospects for recovery, particularly considering the ongoing extensive eradication project targeting the introduced Japanese weasel on these islands.</p>

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Variation in cold tolerance of the common house gecko (Hemidactylus frenatus) of northern edge populations

Tao, S.-D., Toda, M.

Herpetological Conservation and Biology   19 ( 1 ) 73 - 83   2024年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

VARIATION IN COLD TOLERANCE OF NORTHERN EDGE POPULATIONS OF THE COMMON HOUSE GECKO (<i>HEMIDACTYLUS FRENATUS</i>)

Tao, SD; Toda, M

HERPETOLOGICAL CONSERVATION AND BIOLOGY   19 ( 1 ) 73 - 83   2024年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Genetic and morphological studies on Goniurosaurus kuroiwae (Squamata: Eublepharidae), with a description of a new species from the northern part of Okinawajima Island, Ryukyu Archipelago, Japan

Kurita, T., Toda, M.

Current Herpetology   43 ( 1 ) 86 - 114   2024年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Demographic imbalance in the hybrid zone led to asymmetric gene flow between two closely related geckos, Gekko hokouensis and Gekko yakuensis (Squamata: Gekkonidae)

Okamoto, K., Tominaga, A., Toda, M.

Biological Journal of the Linnean Society   141 ( 1 ) 181 - 132   2023年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Geological history of the land area between Okinawa Jima and Miyako Jima of the Ryukyu Islands, Japan, and its phylogeographical significance for the terrestrial organisms of these and adjacent islands.

Watanabe, N., Arai, K., Otsubo, M., Toda, M., Tominaga, A., Chiyonobu, S., Sato, T., Ikeda, T., Takahashi, A., Ota, H., Iryu, Y.

Progress in Earth and Planetary Science   10   2023年07月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

オンナダケヤモリの南大東島からの初記録

深草彩子・戸田守

Akamata ( 沖縄両生爬虫類研究会 )  ( 31 ) 25 - 26   2022年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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）

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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）

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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）

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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>

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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>

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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）