Updated on 2026/02/20

写真a

 
DOI Wataru
 
Organization
Research Field in Fisheries, Agriculture, Fisheries and Veterinary Medicine Area Faculty of Fisheries Department of Fisheries Science and Technology Associate Professor
Title
Associate Professor
Degree
(2007.3 Tokyo University of Marine Science and Technology)
(2004.3 Tokyo University of Fisheries)
(2002.3 Tokyo University of Fisheries)

Research Areas

Aquatic bioproduction science, Aquatic bioproduction science

Research History

  • 2018.9    Kagoshima University   Research Field in Fisheries, Agriculture, Fisheries and Veterinary Medicine Area Faculty of Fisheries Department of Fisheries Science and Technology   Associate Professor

  • 2018.9    Kagoshima University   Faculty of Fisheries   Associate Professor

Professional Memberships

  •    水産海洋学会

  •    日本甲殻類学会

  •    日本水産学会

  •    日本ベントス学会

  •    日仏海洋学会

  •    The Crustacean Society

▼display all

Committee Memberships

  • 2021.1    日本甲殻類学会   庶務幹事   Academic society

  • 2021.1    日本甲殻類学会   評議員   Academic society

  • 2009      The Crustacean Society Summer Meeting in Tokyo 組織委員 (2009年)  

 

Papers

  • Md Alomgir HOSSEEN, Wataru DOI, Kazuhiro SHIOZAKIand Jun OHTOMI .  Recruitment, growth pattern and longevity of jack-knife shrimp Haliporoides sibogae (Solenoceridae) in Kagoshima Bay, southern Japan .  Aquaculture Science73 ( 1 ) 15 - 28   2025.4Reviewed

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    Language：English   Publishing type：Research paper (scientific journal)  

  • 土井　航 .  種子島におけるアシハラガニとコメツキガニの記録 .  Nature of Kagoshima51   281 - 285   2025.3

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    Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

  • Genki Kobayashi, Wataru Doi, Tomoko Yamamoto .  Genetic homogeneity in soldier crab Mictyris guinotae populations across their geographic distribution in the Ryukyu Islands, Japan .  Marine Biology Research21 ( 1 ) 38 - 46   2025Reviewed

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    Language：English   Publishing type：Research paper (scientific journal)  

    The Japanese Archipelago comprises a chain of islands; therefore, gaps between islands can represent potential dispersal barriers for coastal species, especially those inhabiting tidal flats. This study investigates the population genetic structure of the soldier crab Mictyris guinotae (Brachyura: Thoracotremata: Mictyridae) using mitochondrial COI gene sequences. Specimens were collected from Tanegashima Island and five Ryukyu Islands, covering the species’ known geographic distribution. Although the Mantel test identified a moderate trend (r2 = 0.41, P < 0.01) for isolation by distance, all populations exhibited high haplotype and nucleotide diversities, with neither analysis of molecular variance nor ΦST detecting genetic differences among populations. Notably, the northernmost population (Tanegashima Island), approximately 260 km from the nearest known geographic distribution on Amami-Oshima Island, shared haplotypes with other populations, although the number of specimens from Tanegashima Island is only four due to its small population size. This absence of genetic differences among populations of M. guinotae differs from other intertidal organisms in the region examined in previous studies. Mismatch distributions suggest contrasting demographic history in M. guinotae and the sand bubbler crab Scopimera ryukyuensis, which has been revealed to show population genetic structuring despite its similar geographic distribution to M. guinotae. The present study provides another case of genetic diversity among intertidal organisms in the Ryukyu Islands.

    DOI： 10.1080/17451000.2024.2423169

    Scopus

  • Masaki Jinno, Wataru Doi, Akira Mizutani, Hiroyoshi Kohno .  Intraspecific Variation in Reproductive Aspects of Female Soldier Crabs, Mictyris guinotae, Between the River Mouth and Upper Reach Habitats .  Marine Ecology   2024.12Reviewed

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    Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

    The soldier crab, Mictyris guinotae, is a dominant intertidal crustacean associated with sand flats in the vicinity of the Urauchi River estuary on Iriomote Island, Japan. We compared various aspects of its reproductive biology at two sites (the river mouth and upper reach) on exposed bare sand flats 300 m and 3000 m upstream from the mouth. Bimonthly sampling was conducted between November 2010 and April 2011. The abundance of female crabs was higher at the mouth of the river. Female individuals had significantly larger body sizes (approximately 1.5 times larger carapace length) in the upper reaches. Despite the low presence of ovigerous females in the upper reach site, their larger body size led to the release of a substantial number of larvae per individual, although fewer larvae were produced per day than by females at the river mouth. The breeding period, as inferred from the occurrence of ovigerous females, persisted from December to March. At the upper reach site, the duration was slightly shorter, with an earlier peak. Variations in larval release timing may compensate for fluctuations in recruitment success.

    DOI： 10.1111/maec.12850

    Scopus

  • Md Alomgir Hossen, Wataru Doi, Jun Ohtomi .  Ovarian maturation, size at sexual maturity, and spawning season of jack-knife shrimp Haliporoides sibogae (Decapoda: Solenoceridae) in Kagoshima Bay, southern Japan .  Fisheries Science   2024.6Reviewed

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    Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s12562-024-01798-7

    Scopus

    Other Link： https://link.springer.com/article/10.1007/s12562-024-01798-7/fulltext.html

  • Wataru Doi, Kenji Nohara, Hiroyuki Inoue, Hiroyoshi Kohno .  Genetic structure and diversity of the island-endemic freshwater prawn <i>Macrobrachium shokitai</i> Fujino &amp; Baba, 1973 (Decapoda: Caridea: Palaemonidae) on Iriomote Island, Ryukyu Archipelago, southern Japan .  Journal of Crustacean Biology44 ( 2 )   2024.6Reviewed

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    Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    Iriomote Island is a small continental island hosting approximately 40 rivers characterized by short, steep-gradient streams and small waterfalls. We examined the population genetic structure and diversity of the freshwater prawn Macrobrachium shokitaiFujino &amp; Baba, 1973 (Palaemonidae) using the mitochondrial cytochrome c oxidase subunit I (COI) gene sequence. Specimens were collected from 19 sites along ten rivers on the island, covering the known geographic distribution of the species. Haplotype and nucleotide diversities were very low within each river on the island. Nearly all haplotypes were exclusive to a given river, confirming distinct population structures among rivers at a small geographical scale. Slight genetic differentiation was discerned between the upper and lower sites of waterfalls in only the Yuchin River. Phylogenetic tree reconstruction, haplotype network, and principle coordinate analysis classified five clades roughly correspond to geographical groups in the western, southern, central, and northern regions of the island. Extreme caution should therefore be taken when translocating individuals to other rivers to avoid introducing genetic disturbance, even during conservation and mitigation efforts.

    DOI： 10.1093/jcbiol/ruae031

    Scopus

  • Nawer F., Doi W., Ohtomi J. .  Recruitment and growth patterns of the portunid crab Charybdis bimaculata in Kagoshima Bay, southern Japan .  Fisheries Science   2023Reviewed

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    Language：Japanese   Publisher：Fisheries Science  

    We studied the recruitment and growth patterns of the portunid crab Charybdis bimaculata in deep water for the first time. The study area, Kagoshima Bay, is a semi-enclosed, deep-water bay characterized by steep slopes, with unique caldera walls where C. bimaculata is one of the dominant decapods and acquiring commercial importance. The monthly length-frequency method was used from a total of 8265 individuals collected over a three study periods—1990s, 2010s, and 2020s—at the central basin (174–229 m depth) and one study period 1990s at the channel area (122–136 m depth). Carapace width ranged from 9.5 to 42.7 mm in males, and 9.5 to 35.0 mm in females. The overall sex ratio significantly deviated from 1:1 favoring females. Recruitment was estimated to occur between September to November in this bay. Recruitment seemed to be synchronized with the peak spawning season with a time lag of 2–4 months. Growth was appositely delineated by the von Bertalanffy growth function for both sexes. The growth equations revealed that males had lower K values and higher asymptotic sizes than females. Spatial and temporal comparison in growth parameters between the same sexes found no statistical differences except in one case.

    DOI： 10.1007/s12562-022-01661-7

    Scopus

  • Doi Wataru, Washiyama Hirofumi, Suzuki Nobuhiro .  Size at sexual maturity of male Lucensosergia lucens (Decapoda: Sergestidae) in Suruga Bay, Japan .  Crustacean Research51 ( 0 ) 1 - 10   2022.12Reviewed

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Carcinological Society of Japan  

    <p>This study investigated size at sexual maturity of the male sergestid shrimp <i>Lucensosergia lucens</i> (“Sakura-ebi” in Japanese). The shrimps were captured in the inner part of Suruga Bay, Japan in August 2013 using experimental trawls. Carapace length (CL), body length (BL), development of petasma, and presence of spermatophores in the terminal ampoule were documented. Probabilities of maturity as a function of CL were modeled using general linear models with a binomial and logit link function and predicted the CL at which 50% of individuals were mature (<i>CL</i><sub>50</sub>). Morphologically mature males had a petasma connected with the pars astringens, and the basal part of the pars media was developed. In physiologically mature males, chambers in terminal ampoules were filled with spermatophores, including spermatozoa and appendages. <i>CL</i><sub>50</sub> (mm) was estimated to be 8.87 (=27.86 mm BL) and 7.84 (=24.65 mm BL) based on the morphological and physiological criteria, respectively. It is believed that most of the age-0 males attain sexual maturity within the first year and mature males are exploited in the autumn fishing season (October–December).</p>

    DOI： 10.18353/crustacea.51.0_1

    CiNii Research

  • Doi Wataru, Kikuchi Ren, Mizutani Akira, Kohno Hiroyoshi .  Mating and burrow plugging behavior of <i>Cardisoma carnifex</i> on the Iriomote-jima Island in Japan .  Crustacean Research51 ( 0 ) 137 - 145   2022.12Reviewed

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Carcinological Society of Japan  

    <p>To characterize the reproductive behavior of the land crab <i>Cardisoma carnifex</i>, their nighttime activities on the ground surface around their burrows were monitored using infrared-triggered cameras on the Iriomote-jima Island, Japan. Matings of three pairs were recorded near the entrance of the female’s burrow. The results showed that the species shares a common mating pattern of gecarcinids: hard-female mating and short courtship. The males did not exhibit courtship behavior, except for drumming on the surface sediment. The duration of copulation was longer (29, 30, and 49 min) than that in the reference data (1–10 min). After mating, males guarded their mate’s burrow and plugged the opening from the outside. By contrast, the resident crabs sometimes plug their burrows from the inside. Burrow plugging by <i>C. carnifex</i> males is similar to post-copulatory guarding by males of brachyurans, to prevent multiple matings by females. The non-invasive cameras revealed novel features of mating behavior of <i>C. carnifex</i> such as longer copulation, drumming behavior, and burrow plugging by males.</p>

    DOI： 10.18353/crustacea.51.0_137

    CiNii Research

  • Doi Wataru, Suzuki Nobuhiro .  Growth and reproduction of the mole crab Hippa truncatifrons in Suruga Bay, central Japan .  Aquatic Animals2022 ( 0 ) AA2022-11 - 11   2022.6Reviewed

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    Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：Aquos Institute  

    The life history characteristics of the mole crab (Hippa truncatifrons) were studied using monthly or bimonthly sampling at a cobble shore on the Miho Peninsula, located in the inner part of Suruga Bay, central Japan, between April 2013 and March 2014. A total of 523 individuals was collected, comprising 276 males (carapace length, CL, 3.4–9.7 mm) and 247 females (CL 4.9–15.0 mm). The number of individuals collected showed two peaks (>10 individuals per station), in early summer and autumn, and decreased to only a few per station in winter. The population exhibited a unimodal CL distribution, with the modes of CL gradually increasing between April and July. Smaller individuals (<4.0 and <7.0 mm CL for males and females, respectively) appeared in August. After August, bimodal distributions of CL were recorded, with fewer individuals in the larger size group. This indicates the mean lifespan was estimated to be almost one year, with some individuals surviving for up to two years after hatching. Ovigerous females were observed between May to September, but were most abundant during June and July. Ovarian development corresponded with the occurrence of ovigerous females. The size at sexual maturity for females was estimated to be 10.2 mm CL. Batch fecundity ranged from seven to 1801 and was correlated with CL for some embryonic stages in all breeding season and early embryonic stages in the early breeding season. Some ovigerous females with late embryonic developmental stages had mature ovaries, indicating multiple spawning by some females during one reproductive season. The Suruga Bay population showed a typical life history similar to that of the Sagami Bay and Hokuriku populations, but different from that of extreme areas, such as Aomori (the northern limit of their range) and an island in Mikawa Bay with large-sized individuals.

    DOI： 10.34394/aquaticanimals.2022.0_aa2022-11

    CiNii Research

  • Doi Wataru, Inoue Hiroyuki, Kohno Hiroyoshi .  Aspects of distribution, growth, and reproduction of the fluvial prawn, <i>Macrobrachium shokitai,</i> in a subtropical river on Iriomote Island, Japan .  Plankton and Benthos Research17 ( 2 ) 192 - 200   2022.5Reviewed

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Plankton Society of Japan, The Japanese Association of Benthology  

    <p>This study investigates the distribution, growth, and reproduction of the fluvial, regional, and vulnerable species, <i>Macrobrachium shokitai,</i> on Iriomote Island in southwestern Japan. Prawns were captured at seven stations along a small, 4.0-km-long river, among ca. 40 rivers on the island. Animals were collected monthly during 2019 and abundance, carapace length (CL), sex, and the presence or absence of eggs attached to pleopods were documented. Prawns were primarily collected at stations >2.7 km above the river mouth at >270 m elevation. Stable, dense populations were observed above the waterfall. The sex ratio was significantly female-biased between January and August. Later in the year the ratio was 1 : 1. A bimodal CL distribution was recorded; with the emergence of larger individuals in some months. Lifespan appeared to be >1 year. Recruits, including several juvenile instars, were found between August and December. Ovigerous females were encountered from April to October but were more abundant from June to August. The phenology and duration of the breeding season were consistent with generic characteristics of the genus throughout subtropical and temperate East Asia.</p>

    DOI： 10.3800/pbr.17.192

    Scopus

  • 橋本慎太郎, 新海龍ノ介, 土井 航 .  鹿児島県本土と屋久島におけるスナガニ属（短尾下目：スナガニ科）の分布 .  Nature of Kagoshima49   31 - 34   2022.5

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  • Fairuz Nawer, Wataru Doi, Jun Ohtomi .  Oocyte and embryonic development, size at sexual maturity, and spawning season of Charybdis bimaculata .  FISHERIES SCIENCE88 ( 4 ) 449 - 459   2022.5Reviewed

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER JAPAN KK  

    This study describes the first thorough investigation of oocyte and embryonic development as well as histologically confirmed size at sexual maturity of female Charybdis bimaculata. A total of 1211 females were collected from the central part of Kagoshima Bay, southern Japan, from October 2018 to January 2020. Six sequential oocyte developmental stages were confirmed by histological examination. C. bimaculata exhibited asynchronous-type ovarian development. Therefore, ovarian maturity status (immature, maturing, and mature) was determined from the most advanced oocyte found in the ovary. Females having oocytes evidencing either germinal vesicle breakdown or migratory nucleus were defined as mature. Mature females ranged from 19.0 to 30.6 mm in carapace width. The size at sexual maturity was estimated to be 21.8 mm in carapace width based on the 50% maturity size. The spawning season was determined from May to November when mature females occurred. Microscopic observation confirmed four sequential embryonic developmental stages. The majority of females with final-stage embryos had mature ovaries signifying continuity of reproduction. Asynchronous-type ovary, continuous reproduction, and consecutive broods suggest multiple spawning in a single spawning season. The incubation period was estimated to be under 1 month for C. bimaculata.

    DOI： 10.1007/s12562-022-01601-5

    Web of Science

    Scopus

  • DOI Wataru, MORITA Susumu, MUTO Benjamin F. .  Growth and reproduction of <i>Cyclograpsus pumilio</i>(Brachyura: Varunidae) on a cobble shore in Suruga Bay, Japan .  Japanese Journal of Benthology76 ( 0 ) 31 - 38   2021.12

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    Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：JAPANESE ASSOCIATION OF BENTHOLOGY  

    <p>The life history characteristics of the varunid crab <i>Cyclograpsus pumilio</i> were studied by monthly sampling at a cobble shore in Ooigawa Port (34°46′35.2″N, 138°17′59.3″E), located in the inner part of Suruga Bay, Japan, between March and December 2017. A total of 964 individuals were collected, including 410 males (2.91–5.90 mm carapace width, CW) and 554 females (3.81–10.30 mm CW). The number of individuals collected exceeded 100 each month until August and then abruptly decreased to<10 per month. The monthly frequency distribution of mode CW showed no temporal changes in males and a slight decrease in females, from 9.5 mm in March to 7.0 mm in October. Smaller females of CW<4.5 mm were obtained between April and August. The changes in the relative growth of propodus height in males and abdominal width in females versus CW were determined by model analysis. The sizes at morphological maturity were estimated to be 3.98- and 6.39-mm CW for males and females, respectively. Ovigerous females with CW 6.92–9.29 mm (<i>n</i>=18) were obtained between June and August and again in October. During the study period, the population of <i>C. pumilio</i> in Ooigawa almost went extinct due to habitat loss in September, when a layer of cobbles collapsed following a typhoon. This local population was characterized by very low proportions of ovigerous females (<11%) each month, lower and variable batch fecundity, and shorter recruitment period compared with the proportions found in other areas.</p>

    DOI： 10.5179/benthos.76.31

    CiNii Research

  • Masaki Jinno, Wataru Doi, Akira Mizutani, Hiroyoshi Kohno .  Influence of salinity on the horizontal distribution of soldier crab Mictyris guinotae in a subtropical river in Japan .  Marine Biology Research17 ( 7-8 ) 707 - 722   2021.11Reviewed

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    Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

    DOI： 10.1080/17451000.2021.2013502

    Scopus

  • 遠藤　光・土井　航・Gregory N. Nishihara .  統計解析ソフト R のスタートアップガイド .  わだつみ   2021.1

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

  • 土井　航 .  統計解析ソフト R を用いたグラフ描画 .  わだつみ   2021.1

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

  • Masaki Jinno, Wataru Doi, Akira Mizutani, Hiroyoshi Kohno .  Seasonal changes in body color of Mictyris guinotae (Brachyura: Mictyridae) .  Crustacean Research   2020.12Reviewed

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  • Wataru Doi, Hiroyuki Inoue, Akira Mizutani, Hiroyoshi Kohno .  Gastropod shell use by the land hermit crabs Coenobita brevimanus and C. cavipes in an abandoned village on Iriomotejima Island, Japan .  Crustacean Research   2020.12Reviewed

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  • 井上太之・塚田直哉 ・中野太成・土井　航・河野裕美 .  西表島の12河川における淡水性コエビ類相 .  西表島研究 2019, 東海大学沖縄地域研究センター所報   1 - 24   2020.12

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    Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 土井　航・井上太之・河野裕美 .  西表島の河川上流におけるオカヤドカリCoenobita cavipesの観察記録 .  西表島研究 2019, 東海大学沖縄地域研究センター所報   25 - 30   2020.12

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • Wataru Doi, Daiki Itoh, Shunsuke Kato, Akira Mizutani and Hiroyoshi Kohno .  Reproductive biology of the land crab Epigrapsus politus Heller, 1862 (Brachyura: Gecarcinidae) on Iriomote-jima, Japan .  Journal of Crustacean Biology   2020.3Reviewed

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  • 土井　航・水谷　晃・河野裕美 .  西表島におけるオオナキオカヤドカリの降海移動と幼生放出 .  西表島研究2018，東海大学沖縄地域研究センター所報   2019.12

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  • Taketo Nio, Wataru Doi, Akira Mizutani and Hiroyoshi Kohno .  Seaward migration and larval release of the land hermit crab Coenobita brevimanus Dana, 1852 (Anomura: Coenobitidae) on Iriomote Island, Japan .  Crustacean Research   2019.12Reviewed

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  • Wataru Doi, Shunsuke Kato, Daiki Itoh, Akira Mizutani and Hiroyoshi Kohno .  Distribution, size structure, and relative growth of Epigrapsus politus (Brachyura: Gecarcinidae) in a subtropical bay in Japan .  Crustacean Research   2019.12Reviewed

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  • 井上太之・中野太成・土井　航・河野裕美 .  西表島ユツン川で観察されたコツノテナガエビMacrobrachium latimanusによるフネアマガイSeptaria porcellana捕食の一例 .  西表島研究2018，東海大学沖縄地域研究センター所報   2019.12

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    Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 土井　航・加藤駿佑・崎原　健・河野裕美 .  西表島網取におけるミナミオカガニの巣穴の形態 .  西表島研究2018，東海大学沖縄地域研究センター所報   2019.12

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  • 土井　航・水谷　晃・吉岡雅人・河井　健・河野裕美 .  西表島の網取集落跡地におけるオオナキオカヤドカリの個体群特性と貝殻利用 .  日本ベントス学会誌   2019.3Reviewed

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  • 土井　航 .  サクラエビの産卵頻度と成熟 .  うみうし通信   2019.3Invited

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  • 土井　航・水谷　晃・河野裕美 .  西表島浦内川河口域に生息するオカヤドカリ類の幼生放出 .  西表島研究2017，東海大学沖縄地域研究センター所報 ( 2017 ) 10 - 22   2018.12

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  • 土井　航・村上智一・吉岡雅人・水谷　晃・下川信也・河野裕美 .  西表島網取湾におけるオカガニ類浮遊幼生の移動と加入に関する数値解析 .  土木学会論文集B3（海洋開発）   2018.8Reviewed

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  • 土井　航・中廣篤人・鷲山裕史・鈴木伸洋 .  船上の産卵実験によるサクラエビの産卵率の推定と産卵個体の卵巣の組織学的特徴 .  水産増殖   2018.6Reviewed

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  • 土井　航・中廣篤人・鷲山裕史・鈴木伸洋 .  駿河湾におけるサクラエビ雌の成熟サイズと産卵頻度 .  水産増殖   2018.3Reviewed

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  • Wataru Doi, Akira Mizutani, Hiroyoshi Kohno .  Larval release rhythm of the land hermit crab Coenobita cavipes Stimpson, 1858 (Anomura: Coenobitidae) in Iriomote Island, Japan .  Crustaceana   2018.2Reviewed

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  • 鷲山裕史・中廣篤人・土井　航・鈴木伸洋 .  駿河湾におけるサクラエビの最小産卵体長の推定 .  静岡県水産技術研究所研究報告   2017.10Reviewed

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    Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 土井　航・鷲山裕史・古市皓大・大隅美貴・鈴木伸洋 .  卵巣の色彩に基づいて判別したサクラエビ雌の成熟段階 .  日本水産学会誌   2017.3Reviewed

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  • Wataru Doi, Akira Mizutani, Hiroyoshi Kohno .  Larval release and associated tree climbing behavior of the land hermit crab Coenobita violascens Heller, 1862 (Anomura: Coenobitidae) .  Journal of Crustacean Biology   2016.5Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • Akishige Suguri, Wataru Doi, Hiroyoshi Kohno .  Spatial distribution, population structure and diel changes in pre-feeding posture of Hippa marmorata (Decapoda: Anomura: Hippoidea) on sandy beaches of Iriomote-jima Island, Ryukyu Islands, in the Western Pacific Ocean .  Crustacean Research   2015.12Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • 河野裕美・水谷　晃・土井　航 .  西表島浦内川河口におけるオカヤドカリとコムラサキオカヤドカリの個体群構造と貝殻利用 .  西表島研究2014，東海大学沖縄地域研究センター所報   2015.12

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    Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 丹尾岳斗・村主暁重・水谷　晃・土井　航・河野裕美 .  幼生放出中のオオナキオカヤドカリ周辺に出現したスナホリガニ .  Cancer   2014.8

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

  • Nobuaki Suzuki, Toshiyuki Tanabe, Kenji Nohara, Wataru Doi, Hiroshi Ashida, Takahiko Kameda, Yoshimasa Aonuma .  Annual fluctuation in Pacific bluefin tuna (Thunnus orientalis) larval catch from 2007 to 2010 in waters surrounding the Ryukyu Archipelago, Japan .  Bulletin of Fisheries Research Agency   2014.3Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (bulletin of university, research institution)  

  • Izumi Yamasaki, Wataru Doi, Winda Mercedes Mingkid, Masashi Yokota, Carlos Augusto Strüssmann, and Seiichi Watanabe .  Molecular-based method to distinguish the sibling species Hemigrapsus penicillatus and Hemigrapsus takanoi (Decapoda: Brachyura: Varunidae) .  Journal of Crustacean Biology   2011.11Reviewed

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    Language：English   Publishing type：Research paper (scientific journal)  

  • 土井　航・渡邊精一・清水詢道・田島良博 .  東京湾の平場におけるカニ類相と多様性 .  神奈川自然誌資料   2011.3Reviewed

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 土井　航・渡邊精一 .  東京湾におけるケブカエンコウガニ（十脚目：短尾下目）の個体群構造と生活史 .  日本ベントス学会誌   2010.7Reviewed

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

  • Wataru Doi, Yuichi Iinuma, Masashi Yokota and Seiichi Watanabe .  Comparative feeding behavior of invasive (Carcinus aestuarii) and native crabs (Hemigrapsus takanoi) .  Crustacean Research   2009.12Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • Wataru Doi, Masashi Yokota, Carlos A. Strüssmann and Seiichi Watanabe .  Growth and reproduction of the portunid crab Charybdis bimaculata (Decapoda: Brachyura) in Tokyo Bay .  Journal of Crustacean Biology   2008.11Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • Than Than Lwin, Wataru Doi, Masashi Yokota, Carlos A. Strüssmann and Seiichi Watanabe .  Juvenile morphology of the xanthid crab Leptodius exaratus (H. Milne-Edwards, 1834) (Decapoda: Brachyura), with notes on the appearance of sexual dimorphism .  Invertebrate Reproduction and Development   2007.11Reviewed

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    Language：English   Publishing type：Research paper (scientific journal)  

  • Wataru Doi, Masashi Yokota and Seiichi Watanabe .  Growth and reproduction of the pilumnid crab Benthopanope indica (Decapoda: Brachyura) in Tateyama Bay, Japan .  La Mer   2007.8Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • Wataru Doi, Than Than Lwin, Masashi Yokota, Carlos A. Strüssmann and Seiichi Watanabe .  Maturity and reproduction of goneplacid crab Carcinoplax vestita (Decapoda, Brachyura) in Tokyo Bay .  Fisheries Science   2007.4Reviewed

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

  • 土井　航・渡邊精一 .  ケブカエンコウガニCarcinoplax vestitaにみられた交尾栓 .  Cancer   2006.5

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

  • 土井　航・渡邊精一・清水詢道 .  東京湾生物相モニタリング調査に出現したカニ類の多様性と分布 .  神奈川県水産総合研究所研究報告   2004.3

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

  • 土井　航・渡邊精一 .  トラノオガニに現れた間性個体 .  Cancer   2002.5

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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Books

  • Iriomote Island, Japan. In: Geophysical Approach to Marine Coastal Ecology

    Shinya Shimokawa, Hiroyoshi Kohno, Akira Mizutani, Masako Nakamura and Wataru Doi（ Role： Contributor）

    Shimokawa S., Murakami T., Kohno H. (eds)  2020.2 

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    Responsible for pages：3-35   Language：English Book type：Scholarly book

  • Numerical Analysis of the Dynamic State of Coenobita brevimanus Larvae in Amitori Bay. In: Geophysical Approach to Marine Coastal Ecology

    Wataru Doi, Tomokazu Murakami, Akira Mizutani, Shinya Shimokawa and Hiroyoshi Kohno（ Role： Contributor）

    Shimokawa S., Murakami T., Kohno H. (eds)  2020.2 

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    Responsible for pages：261-273   Language：English Book type：Scholarly book

  • 干潟の十脚目甲殻類. 石川智士・吉川　尚（編）幡豆の海と人びと.

    土井　航（ Role： Contributor）

    東海大学海洋学部 総合地球環境学研究所「東南アジア沿岸域におけるエリアケイパビリティーの向上」プロジェクト  2016.3 

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    Responsible for pages：151-158   Language：Japanese Book type：General book, introductory book for general audience

  • 石川智士・仁木将人・吉川 尚（編）幡豆の干潟探索ガイドブック.

    荒尾一樹・石川智士・大貫貴清・種倉俊之・土井　航・中島　匠・仁木将人・野原健司・林　大・早瀬善正・松浦弘行・松永育之・武藤文人・吉川　尚（ Role： Contributor）

    東海大学海洋学部 総合地球環境学研究所「東南アジア沿岸域におけるエリアケイパビリティーの向上」プロジェクト  2016.3 

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    Total pages：81   Language：Japanese Book type：Scholarly book

  • In the Wrong Place - Alien Marine Crustaceans: Distribution, Biology and Impacts Series: Invading Nature - Springer Series in Invasion Ecology, Vol. 6

    Wataru Doi, Seiichi Watanabe, and James T. Carlton（ Role： Contributor）

    Galil, Bella S.; Clark, Paul F.; Carlton, James T. (Eds.)  2011.3 

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    Responsible for pages：419-449   Language：English Book type：Scholarly book

  • 外来甲殻類.東京湾 人と自然のかかわりの再生

    土井　航・渡邊精一（ Role： Contributor）

    東京湾海洋環境研究委員会  2011.2 

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    Responsible for pages：148-150   Language：Japanese Book type：General book, introductory book for general audience

  • カニ研究者として東京湾再生に思うこと.東京湾 人と自然のかかわりの再生

    土井　航（ Role： Contributor）

    東京湾海洋環境研究委員会  2011.2 

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    Responsible for pages：352-355   Language：Japanese Book type：General book, introductory book for general audience

  • 大都市近郊の内湾域に定着した外来種のカニたち. 海の外来生物－人間によって撹乱された地球の海

    土井　航・渡邊精一・風呂田利夫（ Role： Joint author）

    日本プランクトン学会・日本ベントス学会  2009.10 

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    Responsible for pages：76-90   Language：Japanese Book type：General book, introductory book for general audience

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MISC

Research Projects

  • Ecological effects of nighttime artificial lighting on decapod crustaceans

    Grant number：19K06192  2019.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

  • Utilization and introduction to dietary education of deep-water unexploited aquatic resources

    Grant number：19K02297  2019.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

  • Feeding habits of Sakura shrimp, Lucensosergia lucens, and other crustacean micronekton based on stable isotope and fatty acid analyses

    Grant number：18K05793  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Yoshikawa Takashi

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    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

    Feeding habits of Sakura shrimp, Lucensosergia lucens, and other crustacean micronekton were investigated based on the carbon and nitrogen stable isotope analysis and fatty acid composition analysis in Suruga Bay, Japan. Variations in their feeding habits among species, seasons, life stages, and so on were discussed.