研究者詳細 - 中田　和義

論文 - 中田　和義

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Predation on eggs and larvae of the Japanese brown frog Rana japonica Boulenger, 1879 by the invasive crayfish Procambarus clarkii (Girard, 1852) (Decapoda: Astacidea: Cambaridae) under laboratory conditions 査読

Quang-Tuong Luong, Koki R Katsuhara, Kazuyoshi Nakata

Journal of Crustacean Biology 44 ( 4 ) 2024年10月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Oxford University Press (OUP)

Abstract

We hypothesized that the North American invasive crayfish Procambarus clarkii (Girard, 1852) can negatively affect the populations of native frog species through predation. We conducted three laboratory experiments to examine whether P. clarkii can prey on eggs or larvae of the Japanese native frog Rana japonicaBoulenger, 1879: Experiment I crayfish + frog egg in an aquarium without a substrate or aquatic plants, Experiment II crayfish + frog larva in an aquarium without a substrate or aquatic plants, and Experiment III crayfish + frog larva in an aquarium with a substrate and aquatic plants as shelter for the larva. We used three experimental groups of crayfish individuals (small, intermediate, and large size), each of 10 individuals, and simultaneously placed one crayfish individual and one egg or frog larva in the same aquarium for 24 h and checked for predation by the crayfish. We found that 88.9% and 86.7% of eggs and larvae used in Experiments I and II were preyed upon, respectively. Predation rate of frog larvae was still high (77.8%) in Experiment III, suggesting that crayfish can potentially find and prey on frog larvae in nature. Predation on frog eggs or larvae was high regardless of the crayfish body size. Our results indicate that P. clarkii can potentially have a marked effect on the population of R. japonica by preying on eggs and larvae.

DOI： 10.1093/jcbiol/ruae059

岡山県におけるカワイワシの分布状況査読

森内海渡, 向井貴彦, 金光隼平, 住田崇成, 谷口倫太郎, 中田和義

伊豆沼・内沼研究報告 18 115 - 125 2024年

北米外来線虫Falcaustra catesbeianaeの岡山県のウシガエルからの初報告

土田華鈴, 中市純矢, 中田和義

爬虫両棲類学会報 2024 ( 1 ) 51 - 53 2024年

岡山県岡山市で捕獲されたウシガエルの骨折治癒痕

中市純矢, 勝原光希, 中田和義

爬虫両棲類学会報 2024 ( 2 ) 印刷中 2024年

Reproductive biology of the introduced red-swamp crayfish Procambarus clarkii (Girard, 1852) (Decapoda: Astacidea: Cambaridae) in western Japan 査読国際誌

Quang-Tuong Luong, Rika Shiraishi, Tadashi Kawai, Koki R. Katsuhara, Kazuyoshi Nakata

Journal of Crustacean Biology 43 ( 4 ) 2023年10月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Oxford University Press (OUP)

Abstract

The red swamp crayfish Procambarus clarkii (Girard, 1852) is an alien invasive species as well as a commercially exploited animal. The sterile-male-release technique (SMRT) using infertile but sexually active males has been an effective candidate measure to control this invasive crayfish. Additionally, the limited supply of juveniles due to females’ spawning seasonality hinders the further development of the P. clarkii aquaculture industry. Information on its reproductive biology, such mating strategies and factors affecting offspring production, is crucial for developing an effective SMRT and aquaculture systems for P. clarkii. We review the reproductive biology of this species in terms of 1) sexual dimorphism and reproductive status, 2) sex recognition, mating, and mate preferences, and 3) egg production, embryonic development, and hatching. Intra- and intersexual dimorphisms of chelae are evident in P. clarkii, and a reproductive morphotype (form I) with larger chelae and a non-reproductive morphotype (form II) with smaller chelae are detected in both females and males, allowing us to easily determine the reproductive status of both sexes. The crayfish exhibits mutual mate choice (i.e., preference for larger mates), and small-sized males reproductive potential is low. Female fitness (i.e., number of offspring) generally depends on their body size. Female brood care appears to promote early embryo development before the egg-nauplius stage. Further study is required to identify the maternal factors affecting early embryonic development, which may improve measures for controlling invasive populations and enhancing aquaculture productivity.

DOI： 10.1093/jcbiol/ruad063

アメリカザリガニによる2種のトンボ類幼虫に対する捕食査読

水井颯麻, Quang-Tuong Luong, 勝原光希, 中田和義

Cancer 32 19 - 27 2023年10月

岡山県倉敷市の畦畔および休耕田におけるナゴヤダルマガエルの選好環境査読

多田正和, 三宅祐未, 中嶋佳貴, 伊藤邦夫, 齋藤稔, 中田和義

応用生態工学 25 ( 2 ) 71 - 85 2023年3月

Quantitative PCR method to detect an extremely endangered bitterling fish (Rhodeus atremius suigensis) using environmental DNA 査読国際誌

Kanoko Otsuki, Mayuko Hamada, Noriyuki Koizumi, Tatsuya Sakamoto, Kazuyoshi Nakata

Landscape and Ecological Engineering 19 ( 1 ) 79 - 86 2023年

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Springer Science and Business Media LLC

DOI： 10.1007/s11355-022-00531-9

その他リンク： https://link.springer.com/article/10.1007/s11355-022-00531-9/fulltext.html

山口市 J 地区におけるビオトープによる生物多様性保全効果の検討査読

中田和義, 三田康祐, 中西毅

農業農村工学会誌 90 ( 8 ) 587 - 590 2022年8月

農業水路に適用可能な可搬魚道システムの提案査読

高橋直己, 三澤有輝, 本津見桜, 柳川竜一, 多川正, 中田和義

農業農村工学会論文集 89 ( 1 ) I_29 - I_35 2021年2月

ブラジルチドメグサの物理的防除法の検討および水生動物の生息空間としての実態査読

中嶋佳貴, 藤井清佳, 沖陽子, 中田和義

農業農村工学会誌 88 ( 11 ) 15 - 18 2020年11月

農業水路の生態系を測る「魚の棲みやすさ評価プログラム」査読

渡部恵司, 細川晴華, 中田和義, 嶺田拓也, 小出水規行

農業農村工学会誌 88 ( 1 ) 27 - 30 2020年1月

水田水域に定着した外来種アメリカザリガニの生態と有効な駆除手法

中田和義

農業および園芸 95 ( 4 ) 285 - 290 2020年

岡山県倉敷市におけるナゴヤダルマガエルの越冬環境査読

多田正和, 伊藤邦夫, 齋藤稔, 森也寸志, 福桝純平, 中田和義

農業農村工学会論文集 87 ( 2 ) I_179 - I_187 2019年

担当区分：責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人農業農村工学会

<p>ナゴヤダルマガエルの越冬場所に影響を及ぼす環境要因の解明を目的として, 岡山県倉敷市内で本種が高密度に生息する地区の慣行水田と休耕田の各1筆で野外調査を実施した．その結果, 越冬個体の大半（35個体中34個体）が休耕田で確認された．越冬個体の在／不在（1／0）を目的変数, 各コドラートのカバー率・草高・土壌pH・体積含水率・間隙率・土壌硬度を説明変数として一般化線形モデル（GLM）により解析した結果, 土壌硬度・カバー率・草高の二乗項が最良モデルで選択され, 土壌硬度には有意な負の効果が認められた．水田で本種の越冬場所を創出する上では, 土壌硬度と田面の植物の存在が重要になると考えられた．</p>

北海道えりも町豊似湖で捕獲されたミシシッピアカミミガメTrachemys scripta elegansの生態系への影響と今後の対策について

中岡利泰, 大原昌宏, 高木大稔, 中田和義

えりも町郷土資料館調査研究報告 15 23 - 32 2018年

農業農村整備のための生態系配慮の基礎知識（7）ー水田・水利施設の外来生物とその対策ー査読

中田和義, 金尾滋史, 伊藤健二

農業農村工学会誌 86 ( 7 ) 39 - 44 2018年

外来種アメリカザリガニの駆除に用いるペットボトル製トラップの検討査読

中田和義, 竹原早恵, 白石理佳

日本ベントス学会誌 71 ( 2 ) 90 - 101 2017年

岡山県南部の農業水路におけるスイゲンゼニタナゴの選好環境査読

中田和義, 宮武優太, 川井健太, 小林蒼茉, 咸成南, 齋藤稔, 青江洋

応用生態工学 19 ( 2 ) 117 - 130 2017年

担当区分：筆頭著者,　責任著者記述言語：日本語出版者・発行元：応用生態工学会

国内希少野生動植物種であるスイゲンゼニタナゴが生息する農業水路において，本種にとっての好適な微生息環境を創出するためには，その生息に影響を及ぼす環境要因を把握する必要がある．そこで本研究では，農業水路においてスイゲンゼニタナゴが選好する環境を解明することを目的に，2014 年 6 月～2015 年 5 月の毎月，本種が生息する岡山県南部の農業水路で魚類調査と物理環境調査を行った．スイゲンゼニタナゴの在/ 不在を目的変数，各環境要因を説明変数として，季節ごとに一般化線形モデル（GLM）あるいは一般化推定方程式（GEE）を用いて解析し，AIC あるいは QICu を基準にモデル選択を行った結果，スイゲンゼニタナゴの出現に有意に影響する環境要因としては，正の効果では春期および夏・秋期の沈水植物の植被率と冬期の障害物および水上カバーの存在が，負の効果では春期の流速が選択された．したがって，スイゲンゼニタナゴの出現に重要となる環境要因は，季節によって異なることが明らかとなった．また，スイゲンゼニタナゴが出現した地点の水深と流速の月ごとの平均値については，季節にかかわらず，水深では 20～50 cm 程度の水域（調査期間全体での平均水深 37.7 cm），流速では 11.5 cm/s 未満の緩流域（調査期間全体での平均流速 3.4 cm/s）に限られていた．以上から，農業水路において，本種の保全策として好適な生息環境を創出する場合には，沈水植物と水上カバーの存在に加えて，流速 11.5 cm/s 未満（平均流速 3.5 cm/s 程度）の緩流域と 20～50 cm 程度の水深を伴う生息環境を整えることが重要と考えられた.

DOI： 10.3825/ece.19.117

岡山県南部の農業水路における希少タナゴ類の人工産卵床利用査読

中田和義, 小林蒼茉, 川本逸平, 宮武優太, 青江洋

応用生態工学 20 ( 1 ) 33 - 41 2017年

“楊貴妃メダカ”におけるカルテノイドについて査読

塩出雄亮, 中田和義

水産増殖 65 ( 3 ) 203 - 208 2017年

農業水路の環境配慮区間における魚類の移動と有効性査読

久保田由香, 門脇勇樹, 佐貫方城, 中田和義

応用生態工学 20 ( 2 ) 213 - 219 2017年

環境配慮工法が施工された農業水路における魚類の選好環境：活動期と越冬期の比較査読

門脇勇樹, 久保田由香, 佐貫方城, 中田和義

農業農村工学会論文集 85 ( 2 ) II_61-II_70 - II_70 2017年

担当区分：責任著者記述言語：日本語出版者・発行元：公益社団法人農業農村工学会

環境配慮工法が施工された岡山県総社市の農業水路において魚類採捕と物理環境調査を実施し, 魚類の生息に重要な物理環境要因を特定した. 本研究では, 調査時期を魚類の活性状況の違いによって活動期と越冬期に区分し, 結果を比較した. 採捕された魚類の種数・個体数・多様度指数を目的変数, 水深・流速・沈水植物の植被率・河床材料を説明変数として重回帰分析を行った結果, 調査水路の魚類の生息に重要となる物理環境として, 活動期では水深多様度・最小流速・平均流速が, 越冬期では沈水植物の植被率・最大水深・平均流速が選択された. したがって, 農業水路の環境配慮区間における魚類の生息にとって重要な物理環境は, 魚類の活動期と越冬期とでは異なることが明らかとなった.

DOI： 10.11408/jsidre.85.II_61

河川での野外実験によるモクズガニの隠れ家に関する選好性の評価査読

米澤孝康, 齋藤稔, 山城考, 浜野龍夫, 中田和義

応用生態工学 19 ( 1 ) 1 - 11 2016年

虹色素胞による青い光沢を有するメダカの体色変異体査読

塩出雄亮, 中田和義

日本水産学会誌 82 ( 4 ) 628 - 630 2016年

都市の水環境に定着した外来ザリガニが在来生態系に及ぼす影響

中田和義

用水と廃水 57 ( 7 ) 519 - 524 2015年

Validity of movie recording for quantitative abundance estimation and body size measurement of Macrobrachium shrimps 査読

M. Saito, T. Hamano, K. Nakata

Crustacean Research 44 39 - 53 2015年

記述言語：英語出版者・発行元：日本甲殻類学会

Collecting Macrobrachium shrimps for abundance estimation is challenging, especially in high gradient, boulder dominated streams. The recent advent of digital cameras could change the situation by enabling previously under-used snorkel counting to yield verifiable data. The validity and efficiency of underwater movie recording for shrimp census were tested and compared with those of underwater shrimp net collection and sweeping in a field experiment (1–4 adult shrimps/m²). Total length estimates from the video footage were compared with caliper measurements. Detection was not affected by species, sex, or shrimp density. Movie recording and shrimp net collection yielded high and constant detection probability of adult shrimps (0.955 and 0.874), in contrast to sweeping (0.097). The movie recording had higher efficiency than the other two methods. For juveniles, only shrimp net collection was valid as an abundance indicator, with a detection probability of 0.338. Accuracy of total length estimates made from the video footage did not differ between species or sex and was highly correlated with the actual measurements by digital caliper. These results confirm that in adult Macrobrachium shrimps, the movie recording is valid for body size and quantitative abundance estimation, but not in juveniles.

DOI： 10.18353/crustacea.44.0_39

その他リンク： https://jlc.jst.go.jp/DN/JLC/20017078595?from=CiNii

好適なサイズの人工巣穴を用いた外来種アメリカザリガニの駆除効果査読

牛見悠奈, 白石理佳, 中田和義

応用生態工学 18 ( 2 ) 139 - 145 2015年

外来種アメリカザリガニの駆除に用いる人工巣穴サイズ査読

牛見悠奈, 宮武優太, 筒井直昭, 坂本竜哉, 中田和義

応用生態工学 18 ( 2 ) 79 - 86 2015年

担当区分：責任著者記述言語：日本語出版者・発行元：応用生態工学会

北米産外来種のアメリカザリガニは，在来生物の捕食などを通じて，在来生態系に深刻な影響を及ぼしている。また，本種が掘る巣穴が水田漏水の原因になるなど水田管理上の問題も引き起こしている。このため，本種は緊急対策外来種と日本の侵略的外来種ワースト 100 に指定され，効率的な駆除手法の開発が求められている。そこで本研究では，水田水域や河川・湖沼等に定着したアメリカザリガニの駆除に用いる人工巣穴の適したサイズを明らかにすることを目的として，本種による人工巣穴サイズ選好性実験を実施した。灰色の直管型の塩ビ管を人工巣穴とし，内径と長さの異なる人工巣穴をアメリカザリガニに室内水槽内で選択させた。その結果，人工巣穴の内径については，全長（X, mm）と好んで選択された内径（Y, mm）の間に Y＝0.58X＋4.26 という有意な回帰式が得られた。人工巣穴の長さについては，全長の 4 倍の長さの巣穴が好んで選択された。以上の結果をもとに，アメリカザリガニの駆除に用いる体サイズ別の人工巣穴サイズを提案した。

DOI： 10.3825/ece.18.79

外来種アメリカザリガニの駆除に用いる篭と使用餌査読

白石理佳, 牛見悠奈, 中田和義

応用生態工学 18 ( 2 ) 115 - 125 2015年

1872年に北海道阿寒湖で採集されたニホンザリガニ標本と出現したヒルミミズ類：八田三郎標本の観察査読

中田和義, 永野優季, 大橋慎平, 河合俊郎, 大高明史

日本ベントス学会誌 69 ( 2 ) 90 - 94 2014年

担当区分：筆頭著者,　責任著者記述言語：英語出版者・発行元：日本ベントス学会

In Lake Akan, Hokkaido, northern Japan, the local population of the native and endangered Japanese crayfish Cambaroides japonicus (De Haan, 1841) is extinct, whereas the signal crayfish Pacifastacus leniusculus (Dana, 1852), an invasive species from North America, has become established and rapidly increased. This study provides information about specimens of C. japonicus preserved by Dr. Saburo Hatta from the lake in 1872. The six specimens (two males and four non-ovigerous females) are valuable evidence of C. japonicus formerly inhabiting Lake Akan. The body sizes of the specimens were 24.4–29.5 mm in carapace length and 55.7–67.4 mm in total length, and the estimated age of the largest specimen was ten years, indicating that Lake Akan of that time provided a suitable habitat. Twenty-two ectosymbiotic crayfish worms (Annelida, Clitellata, Branchiobdellida) were found attached to the specimens. Three branchiobdellidan species were identified: Cirrodrilus cirratus Pierantoni, 1905, C. inukaii (Yamaguchi, 1934) and C. megalodentatus (Yamaguchi, 1934). This is the first record of the latter two species from Lake Akan.

DOI： 10.5179/benthos.69.90

その他リンク： https://jlc.jst.go.jp/DN/JLC/20006922885?from=CiNii

Factors affecting distribution of freshwater shrimps and prawns in the Hiwasa River, southern central Japan 査読

M. Saito, T. Yamashiro, T. Hamano, K. Nakata

Crustacean Research 41 27 - 46 2012年

Effect of pH and water temperature on the development of the Japanese crayfish, Cambaroides japonicus eggs in vitro 査読

H. Matsubara, A. Chiba, Y. Horie, D. Iwata, M. Shimizu, T. Kinoshita, K. Nakata

New Frontiers in Crustacean Biology, Crustaceana Monographs 15 235 - 240 2011年

長野県安曇野市に生息する特定外来生物ウチダザリガニの生息地の環境とその由来査読

熊川真二, 中田和義, 川井唯史

日本ベントス学会誌 66 ( 1 ) 26 - 32 2011年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：JAPANESE ASSOCIATION OF BENTHOLOGY

Official documents and archives suggest that the alien crayfish Pacifastacus leniusculus (Dana, 1852) was introduced into Japan from North America on five occasions from 1926 to 1930, and populations have survived in Hokkaido, Nagano, and Shiga Prefectures. The chemical conditions and biological environment of an established habitat near their original a release point in Akashina, Azumino City, Nagano Prefecture, were surveyed on four occasions in 1998 and 1999. Water quality (pH, DO, BOD) and WT were recorded seasonally at each of eight stations, and crayfish and other aquatic macro-organisms were collected. Some predatory fishes (Oncorhynchus mykiss, Anguilla japonica, and Lepomis macrochirus) that might actively eat juveniles of P. leniusculus were recorded. Individual density of P. leniusculus was relatively low compared to its other habitats in Japan. Only 52 crayfish were collected during this study, on 19 of 32 sampling occasions (eight sites, four times each). The shape of the acumen and the species composition of ectosymbiotic crayfish worms (Annelida: Clitellata: Branchiobdellidae) can be used as tools to trace the origin of introduced of P. leniusculus in Japan. The present crayfish from Nagano Prefecture have a relatively short acumen, different from those of specimens from Shiga and Hokkaido Prefectures. Furthermore, the crayfish worm Xironogiton victoriensis occurs only on crayfish from Akashina, Nagano Prefecture. The dates of introduction of P. leniusculus in Nagano (1926, 1929) also differ from those for Hokkaido (1930) and Shiga Prefecture (1926). These findings suggest that the regional population of P. leniusculus in Nagano has a different origin than those in Shiga and Hokkaido, having originated from crayfish that were introduced independently from North America.

DOI： 10.5179/benthos.66.26

その他リンク： https://jlc.jst.go.jp/DN/JALC/00381242488?from=CiNii

EFFECTS OF HABITAT FRAGMENTATION ON THE AMPHIDROMOUS FRESHWATER SHRIMP, CARIDINA LEUCOSTICTA (DECAPODA, ATYIDAE) IN A RICE PADDY DRAINAGE CHANNEL 査読

Kazuyoshi Nakata, Kunihiko Amano, Masatoshi Denda, Junji Miwa, Tatsuo Hamano

CRUSTACEANA 83 ( 9 ) 1125 - 1133 2010年9月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BRILL ACADEMIC PUBLISHERS

Agricultural channels can be important habitats for aquatic species inhabiting agricultural areas. However, water supply in agricultural channels can vary substantially with types of agriculture and irrigation/drainage system, and thereby affect the viability of local populations of aquatic species. In this study, we focused on the amphidromous freshwater atyid shrimp Caridina leucosticta. To clarify whether C. leucosticta utilizes agricultural channels as a habitat in relation to fluctuations in the water supply, we conducted a series of field surveys on the distribution of this shrimp in a rice paddy drainage channel (spring-fed channel) around the Furu River, central Japan, during July and December 2008. Large numbers of C. leucosticta had migrated into that drainage channel. Water from the adjacent rice paddies had disappeared by October, because irrigation was stopped, but the water level in the drainage channel was maintained by a supply of spring water. By mid-November the supply of spring water had almost disappeared, then the channel nearly dried up, and many shrimps were concentrated in an isolated water pool in the channel. Thus, habitat fragmentation of C. leucosticta occurred in terms of water (dis-)continuity. This water pool dried up completely by mid-December. We found many dead individuals of C. leucosticta in the dried-up area of the channel. These rest Its indicate that agricultural channels can be an important temporal habitat for amphidromous freshwater shrimps, but that the drying-up of the channels can lethally affect migrating atyid shrimps.

DOI： 10.1163/001121610X521190

First record of the North American invasive crayfish Pacifastacus leniusculus from the Kanto region, Tone River basin, central Japan: A range expansion to a warm water area 査読国際誌

Kazuyoshi Nakata, Norio Hayashi, Masumi Ozaki, Akifumi Ohtaka, Junji Miwa

Plankton and Benthos Research 5 ( 4 ) 165 - 168 2010年

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The North American invasive signal crayfish Pacifastacus leniusculus was designated as an 'Invasive Alien Species' by the Ministry of the Environment of Japan and by the Ministry of Agriculture, Forestry and Fisheries of Japan on 1 February 2006. We report the first record of P. leniusculus from the Kanto region (Chiba Prefecture), central Japan. Adult specimens of P. leniusculus were collected from the Tone River basin between September 2009 and January 2010. Ectosymbiotic crayfish worms (Annelida, Clitellata, Branchiobdellidae) were found on the crayfish and all specimens were identified as Sathodrilus attenuatus, which outside of its home range in North America occurs only in the Hokkaido and Fukushima Prefecture populations of P. leniusculus
thus suggesting that P. leniusculus in the Tone River basin was introduced from Hokkaido or Fukushima Prefecture. Signal crayfish is considered a cool water species and has been reported mostly in Hokkaido, northern Japan, but our findings strongly indicate that P. leniusculus has become established in a warm water area in central Japan, where the maximum water temperature is above 30°C in summer. These results indicate that P. leniusculus can inhabit warm water areas as well as cool areas and would be able to extend its distribution over a wide range in Japan. © The Japanese Association of Benthology.

DOI： 10.3800/pbr.5.165

河川−農業水路ネットワークにおける両側回遊型甲殻類の個体群存続可能性評価手法の開発査読

中田和義, 傳田正利, 三輪準二, 天野邦彦, 浜野龍夫

河川技術論文集 16 465 - 470 2010年

環境整備目標設定のための過去・現在の水域生息空間ネットワークの比較査読

傳田正利, 天野邦彦, 中田和義

河川技術論文集 15 25 - 30 2009年

両側回遊型甲殻類の生態に着目した生息空間連続性評価手法の開発査読

中田和義, 中西哲, 傳田正利, 天野邦彦, 小林草平, 藤原正季, 浜野龍夫

河川技術論文集 15 31 - 36 2009年

Factors affecting the interval between clutches in the hermit crab Pagurus nigrivittatus 査読国際誌

Satoshi Wada, Takashi Oba, Kazuyoshi Nakata, Atsushi Ito

MARINE BIOLOGY 154 ( 3 ) 501 - 507 2008年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER HEIDELBERG

Interval between reproductive events is an important factor for iteroparous animals because it determines the number of clutches throughout life. This study examined whether female size, clutch size, shell size and prenuptial molting affected the clutch interval in the hermit crab Pagurus nigrivittatus. Precopulatory guarding pairs of P. nigrivittatus were sampled in the field and kept in the laboratory until the female extruded eggs. The clutch interval of each female was assessed as one of two types of relatively "short" and "long" intervals by checking whether the guarded female had eggs and/or egg cases from the preceding brood or not when the guarding pair was collected. The clutch interval was longer in females with prenuptial molting than those without molting and these females usually grew larger at the prenuptial molt. This suggests that female P. nigrivittatus with a long interval might allocate energy into growth at the expense of the number of clutches during the current reproductive season. The allocation to growth is theoretically predicted to decrease with female size. Gastropod shell size is also known to affect the reproductive activity in hermit crabs. However, female size did not significantly affect the clutch interval in P. nigrivittatus, and the effect of gastropod shell size on clutch interval was not consistent with previous empirical studies. These results may be caused by differences in the gastropod species of shell occupied by the females of P. nigrivittatus.

DOI： 10.1007/s00227-008-0944-9

豊川河口域に生息する貝類の分布特性と物理環境特性との関係について査読

尾嶋百合香, 天野邦彦, 中西哲, 小林草平, 中田和義

河川技術論文集 14 437 - 442 2008年

ニホンザリガニの博物学的知見Ⅲ−函館市周辺における情報−

川井唯史, 中田和義

市立函館博物館研究紀要 18 1 - 10 2008年

Temporal allocation pattern between reproduction and growth within a breeding season of the hermit crab Pagurus nigrivittatus 査読

S. Wada, T. Oba, K. Nakata, A. Ito

Crustacean Research 37 67 - 73 2008年

特定外来生物シグナルザリガニ（Pacifastacus leniusculus）の分布状況と防除の現状査読

Usio N, 中田和義, 川井唯史, 北野聡

陸水学雑誌 68 ( 3 ) 471 - 482 2007年12月

Timing of egg hatch of amphidromous freshwater shrimps in a small river (the Nishida River), western Japan 査読

Keiko Ideguchi, Tatsuo Hamano, Kazuyoshi Nakata

FISHERIES SCIENCE 73 ( 4 ) 961 - 963 2007年8月

日本のザリガニ類の生物地理と将来査読

川井唯史, 中田和義, 大高明史

生物科学 58 ( 2 ) 115 - 123 2007年

Asymmetry in mutual predation between the endangered Japanese native crayfish Cambaroides japonicus and the North American invasive crayfish Pacifastacus leniusculus: A possible reason for species replacement 査読

Kazuyoshi Nakata, Seiji Goshima

JOURNAL OF CRUSTACEAN BIOLOGY 26 ( 2 ) 134 - 140 2006年5月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CRUSTACEAN SOC

Asymmetry in mutual predation can be important in species replacement between native and invasive species. Mutual predation between the endangered Japanese native crayfish species Cambaroides japonicus and the North American invasive crayfish Pacifastacus leniusculus was studied to assess the potential impact of P. leniusculus on C. japonicus. We made laboratory experiments to examine mutual predation (i) between individuals in pairs of the same and different species and (ii) among a group comprising single and mixed species. We also made field surveys to clarify the frequency of cannibalism of the two species. In laboratory experiments, the frequency of cannibalism was low by both two species, but predation by P. leniusculus on C. japonicus was severe and most P. leniusculus survived both in different species pairs and in mixed species groups. In field surveys, remains of the two crayfish species, which may have been caused by predation by the same species, i.e., cannibalism, were scanty. The results suggest that asymmetry in mutual predation can be an important cause of species replacement of the native C. japonicus by the invasive P. leniusculus in the field.

DOI： 10.1651/S-2652.1

ホソメコンブに見られる植食性小型巻貝4種による摂餌痕跡査読

中田和義, 山崎友資, 水田浩之, 川井唯史, 伊藤博, 五嶋聖治

水産増殖 54 ( 2 ) 217 - 224 2006年

担当区分：筆頭著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本水産増殖学会

北海道南西部の日本海沿岸で見られる藻場の消失に, 植食性小型巻貝類が及ぼす影響について調べる上で必要となる基礎的知見を得ることを目的に, 研究を実施した。まず, 小型巻貝4種 (クボガイ, コシダカガンガラ, エゾサンショウ, クロタマキビ) によるホソメコンブに対する摂餌痕跡を室内実験で観察した。スチロール樹脂製容器とスライドグラスに着生させたホソメコンブの配偶体をこれら4種の巻貝に摂餌させたところ, すべての巻貝種で配偶体の摂餌が継続的に確認され, 巻貝種間で特徴の異なる摂餌痕跡が観察された。この摂餌痕跡の種間差は, 歯舌の形態と大きさや摂餌様式が巻貝種間で異なることが影響したと考えられた。次に, 野外で採集したホソメコンブの胞子体を観察したところ, 小型巻貝による歯舌の痕跡と思われる形跡が多数観察された。以上から, 植食性小型巻貝がホソメコンブ群落に何らかの影響を与える可能性が示唆された。

DOI： 10.11233/aquaculturesci1953.54.217

移入種ブラウントラウトが淡水産甲殻類に及ぼす影響：絶滅危惧種ニホンザリガニへの捕食査読

中田和義, 中岡利泰, 五嶋聖治

日本水産学会誌 72 ( 3 ) 447 - 449 2006年

外来種ウチダザリガニに対する児童と大人の認識査読

中田和義, 川内和博, 木川田敏晴, 山崎広平, 田中邦明

生物教育 46 ( 4 ) 174 - 183 2006年

植食性小型巻貝によるホソメコンブの摂食に及ぼす水温の影響査読

中田和義, 山崎友資, 水田浩之, 川井唯史, 伊藤博, 五嶋聖治

水産増殖 54 ( 3 ) 375 - 381 2006年

担当区分：筆頭著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本水産増殖学会

北海道南西部の日本海沿岸で見られる藻場の消失に, 植食性小型巻貝類が及ぼす影響を解明する上で必要となる基礎的知見を得ることを目的に, 小型巻貝によるホソメコンブの摂食に水温が及ぼす影響を室内実験によって検討した。まず, コシダカガンガラを用いて, スライドグラスとスチロール樹脂製容器に着生させたホソメコンブ配偶体に対する摂食実験を, 水温5℃, 10℃, 15℃の3条件下でおこなった。コシダカガンガラによる配偶体の摂食量は, 水温が高いほど多くなる傾向が認められたが, 低水温の5℃であっても, コシダカガンガラは配偶体を摂食した。次に, コシダカガンガラとクボガイを用いて, ホソメコンブの幼胞子体 (葉長3cm程度) に対する摂食実験を, 水温10℃と15℃の2条件下で実施した。クボガイでは, 水温条件に関わらず幼胞子体に対する活発な摂食が認められたが, コシダカガンガラでは, 幼胞子体への摂食はほとんど見られなかった。以上から, 植食性小型巻貝によるホソメコンブ群落に対する影響は, 水温条件と巻貝種によって異なる可能性が示唆された。

DOI： 10.11233/aquaculturesci1953.54.375

Coexistence of two North American invasive crayfish species, Pacifastacus leniusculus (Dana, 1852) and Procambarus clarkii (Girard, 1852) in Japan 査読

K Nakata, K Tsutsumi, T Kawai, S Goshima

CRUSTACEANA 78 ( 11 ) 1389 - 1394 2005年12月

New records and distributions of two North American branchiobdellidan species (Annelida : Clitellata) from introduced signal crayfish, Pacifastacus leniusculus, in Japan 査読国際共著国際誌

A Ohtaka, Gelder, SR, T Kawai, K Saito, K Nakata, M Nishino

BIOLOGICAL INVASIONS 7 ( 2 ) 149 - 156 2005年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

This is the first report of two North American branchiobdellidans, Sathodrilus attenuatus Holt, 1981, and Xironogiton victoriensis Gelder and Hall, 1990, on the signal crayfish, Pacifastacus leniusculus (Dana, 1852) introduced into Japan from the Columbia River system, northwestern North America. Signal crayfish from 12 localities in eastern and northern Hokkaido, Japan, were examined and each supported S. attenuatus. In addition, an individual of this species was found on preserved material from Ishikawa Prefecture, central Honshu. All of these branchiobdellidans reported in Hokkaido most probably came from the original population of signal crayfish introduced into Lake Mashu, Hokkaido, Japan, in 1930. It is suggested that the use of non-pathogenic branchiobdellidans, when present, provides an easy method for tracing the spread of crayfishes around Japan and could also be applied in other countries and continents. Specimens of X. victoriensis were only found on crayfish in a stream at Akashina in Nagano Prefecture, central Honshu, Japan. Although the signal crayfish appears to be displacing the endemic Japanese crayfish, C. japonicus, no native branchiobdellidans were found on any of the introduced signal crayfish examined.

DOI： 10.1007/s10530-004-8146-y

山口県西田川における両側回遊性エビ類の幼生の流下と稚エビの加入査読

浜野龍夫, 井手口佳子, 中田和義

水産増殖 53 ( 4 ) 439 - 446 2005年

担当区分：責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本水産増殖学会

両側回遊性エビ類が棲息する山口県西田川において, 河川淡水域で幼生の流下を, 河口とその周辺でプランクトンネットを用いて幼生の分布を, 河口の感潮域で藻状人工基質を使って稚エビの加入をそれぞれ調査した。西田川では, 2科4種の両側回遊性エビ類のゾエアが日没直後の短時間に集中して流下しており, これらは全て第1期ゾエアであった。1998年には, 本河川から約600万個体の幼生が流出したと推計された。しかし, 河口付近では, 幼生はほとんど採集されなかった。一方, 感潮域では, 棲息種以外の稚エビの加入が確認された。以上のことより, 両側回遊性エビ類は外海を通して広域に分散し, 遠方の河川に遡上する個体もあることが推察された。

DOI： 10.11233/aquaculturesci1953.53.439

テナガエビ類の採集に用いるエビ篭の構造と使用人工餌料査読

中田和義, 和田信大, 荒木晶, 浜野龍夫

水産増殖 53 ( 3 ) 263 - 274 2005年

担当区分：筆頭著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本水産増殖学会

テナガエビ類を効果的に採集できるエビ篭の構造と使用人工餌料について検討するため, 1) エビ篭に入れた人工藻体, 2) エビ篭の入り口の直径, 3) エビ篭に用いる人工餌料がテナガエビ類の採集効率に及ぼす効果を調べる野外実験を実施した。エビ篭に人工藻体を入れ, 篭の内部をテナガエビ類の隠れ場所に似せても, 採集個体数は変わらなかった。一方, エビ篭の入り口の直径は採集個体数に大きく影響し, 採集効率は直径40～50mmで最適であったが, 40mmは50mmよりもモクズガニの混獲を防ぐ効果が高かった。人工餌料の実験では, 餌料1 (ウナギ育成用配合飼料) , 餌料2 (餌料1にイカ内臓ソリュブル吸着飼料とオキアミエキスを混ぜた餌料) ともに冷凍サンマと同等の採集効果を期待できた。以上の結果から, テナガエビ類の採集では, 入り口の直径を40mmとしたエビ篭に, 常温での長期保存が可能で, 餌料2よりも安価な餌料1を用いる方法が良いと結論づけた。これらの条件を伴うエビ篭と, 市販のカニ篭 (餌料は冷凍サンマ) を用いて, 8河川4湖沼で採集比較実験を行ったところ, テナガエビ類はエビ篭のみで採集され, エビ篭はテナガエビ類の採集に有効であることが示された。また, このエビ篭は他のエビ類やザリガニ類に対しても採集効果が高かった。

DOI： 10.11233/aquaculturesci1953.53.263

Fecundity of the Japanese crayfish, Cambaroides japonicus: ovary formation, egg, number and egg size 査読国際誌

K Nakata, S Goshima

AQUACULTURE 242 ( 1-4 ) 335 - 343 2004年12月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Ovary formation, egg number and egg size was studied to examine the fecundity of the Japanese crayfish Cambaroides japonicus. From histological observations of ovaries. the ovarian eggs of C japonicus developed as asynchronous oocytes. Many well-grown oocytes were in the ovary after spawning, as well as before spawning. The smallest carapace length of ovigerous females was 15.2 mm. The pleopodal egg number ranged from 22 to 75 and significantly increased with female bode; size. Both egg diameters (2.13-2.50 mm) and weights (0.009-0.017 g) also significantly increased as the female body size increased, but were variable even for die same size crayfish. We conclude that larger females should be used for seed production of C japonicus because of its high fecundity and large eggs. Mature females spawn only once a year in natural habitats. but multiple spawning can be artificially induced within I year because of well-grown oocytes; that remain in the ovary after spawning. Thus, we recommend that an effective technique for artificial induction of multiple spawning be developed from our results. (C) 2004 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.aquaculture.2004.08.043

Reproduction of the alien crayfish species Pacifastacus leniusculus in lake Shikaribetsu, Hokkaido, Japan 査読国際誌

K Nakata, A Tanaka, S Goshima

JOURNAL OF CRUSTACEAN BIOLOGY 24 ( 3 ) 496 - 501 2004年8月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CRUSTACEAN SOC

The reproduction of the alien crayfish species Pacifastacus leniusculus inhabiting Lake Shikaribetsu, Hokkaido, Japan, was studied from August 2002 to August 2003.. Spawning was for a short period after mating in mid October. The eggs developed to eyed stage in June the following year and hatched in mid July. After remaining with their mother for several weeks, the juveniles became independent between late July and August. The egg numbers attached to pleopods of this crayfish significantly increased with the female body size. The time of spawning in Lake Shikaribetsu was similar to that of this crayfish living in North America and Europe reported by previous studies, but the time of egg hatching was later in Lake Shikaribetsu compared with some populations in North America and Europe. A comparison of our results of the reproduction of P. leniusculus with that of the endangered Japanese endemic crayfish species Cambaroides japouicus reported by previous studies showed that P. leniusculus has a markedly higher reproductive ability than C. japonicus in terns of egg numbers.

Artificial incubation of Japanese crayfish (Cambaroides japonicus) eggs by using a simple, easy method with a microplate 査読国際誌

K Nakata, H Matsubara, S Goshima

AQUACULTURE 230 ( 1-4 ) 273 - 279 2004年2月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

We developed a simple, easy method with a microplate to artificially incubate Japanese crayfish (Cambaroides japonicus) eggs for their cultivation. We prepared 6-, 12-, 24-, 48-, and 96-well microplates containing sterile water heated to 5, 10, 15, and 20 degreesC. Fourteen experimental groups for each water temperature were prepared for each of different water volumes (0.125-10 ml) in each well. One embryonic egg was placed in each well. Experiments were also conducted with water collected from the lake where the eggs were harvested from and held at 15 degreesC. In the microplates with sterile water, high proportions of eggs hatched (60-100%) at 15 degreesC in all volumes of water, although the proportions of hatching were low (0-20%) at 5, 10, and 20 degreesC. All eggs died in the experiments that used lake water. We conclude that the 96-well would be the most effective size to hatch crayfish eggs in, because of its convenience. This method using a microplate is simpler and easier compared with methods of previous studies to artificially incubate crayfish eggs, and therefore it might be useful to incubate eggs of other freshwater crayfish species. (C) 2004 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.aquaculture.2003.08.025

本州に分布する北米産ザリガニ（タンカイザリガニ・ウチダザリガニ）の分類と現状

川井唯史, Japan Crayfish Club, 中田和義, 小林弥吉

青森自然誌研究 9 5 - 10 2004年

北海道豊似湖におけるニホンザリガニの繁殖生態

中田和義, 石川慎也, 倉沢栄一, 中岡利泰

えりも町郷土資料館調査研究報告 1 1 - 6 2004年

Competition for shelter of preferred sizes between the native crayfish species Cambaroides japonicus and the alien crayfish species Pacifastacus leniusculus in Japan in relation to prior residence, sex difference, and body size 査読国際誌

K Nakata, S Goshima

JOURNAL OF CRUSTACEAN BIOLOGY 23 ( 4 ) 897 - 907 2003年11月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CRUSTACEAN SOC

Intra- and inter-specific competition for shelter, in relation to prior residence, sex differences, and body-size effects, was studied in the laboratory to assess the potential impact of the alien crayfish species Pacifastacus leniusculus on the endangered Japanese endemic crayfish species Cambaroides japonicus. The resident was placed in an aquarium, which contained a single shelter of preferred size for both C. japonicus and P. leniusculus. After 24 h, the intruder was introduced into the aquarium. In the experiments using different sex pairs of crayfish of approximately equal size, male residents had a significant prior residence effect against female intruders in both crayfish species in the intraspecific contests. However, residents of P. leniusculus dominated C. japonicus regardless of the sex in interspecific contests. In experiments using male crayfish pairs of different sizes, larger individuals had more successful possessions of the shelter against smaller individuals regardless of crayfish species. The body-size advantage strongly influenced the outcome of the both intra- and inter-specific contests regardless of residents or intruders and overcame the prior residence effect in both species. These results suggest that P. leniusculus is superior to C. japonicus in shelter competition if P. leniusculus invades the habitat of C. japonicus.

Water velocity in artificial habitats of the Japanese crayfish Cambaroides japonicus 査読

K Nakata, T Hamano, KI Hayashi, T Kawai

FISHERIES SCIENCE 69 ( 2 ) 343 - 347 2003年4月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：JAPANESE SOC FISHERIES SCIENCE

The appropriate water velocity in artificial burrows for the Japanese crayfish species Cambaroides japonicus was studied. An experimental system of two artificial burrows (burrows A and B) of the same size was set in a large tank. The velocity of burrow A was 0 cm/s and that of burrow B was varied and set at 0 cm/s, 5 cm/s, 10 cm/s, 20 cm/s and 30 cm/s. The selection of these two burrows by C. japonicus was observed. No animals selected burrow B significantly more than burrow A above 10 cm/s. At 20 cm/s, some crayfishes were swept away and could not return to burrows because of the high water velocity. At 30 cm/s, most animals were swept away. We conclude that the appropriate water velocity for the suitability of artificial burrows and the immediate foraging area adjacent to the burrows should be as low as 5 cm/s.

DOI： 10.1046/j.1444-2906.2003.00627.x

ニホンザリガニ稚仔の成長と生残に及ぼす3種の配合飼料の効果査読

中田和義, 太田徹, 浜野龍夫

水産大学校研究報告 51 ( 2 ) 55 - 60 2003年

ウチダザリガニによる人工巣穴の選択性査読

中田和義, 太田徹, 浜野龍夫

水産大学校研究報告 51 ( 2 ) 61 - 67 2003年

アメリカザリガニの移入と分布に関する考察

川井唯史, 一寸木肇, Japan Crayfish Club, 中田和義, 小林弥吉, 荒井健

青森自然誌研究 8 1 - 8 2003年

北海道然別湖で再発見されたニホンザリガニ

中田和義, 川井唯史, 五嶋聖治

上士幌町ひがし大雪博物館研究報告 25 61 - 66 2003年

Lethal limits of high temperature for two crayfishes, the native species Cambaroides japonicus and the alien species Pacifastacus leniusculus in Japan 査読国際誌

K Nakata, T Hamano, KI Hayashi, T Kawai

FISHERIES SCIENCE 68 ( 4 ) 763 - 767 2002年8月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER TOKYO

Lethal limits of high temperature were studied to clarify the effects on the survival of the endangered Japanese crayfish species Cambaroides japonicus and the alien species Pacifastacus leniusculus. After the acclimation period for 2 weeks at 16degreesC, the temperature was raised at a rate of 1degreesC per week. As a result, the ultimate upper lethal temperatures of C. japonicus and P. leniusculus were 27.0 and 31.1degreesC, respectively, and the lethal temperature for P. leniusculus was significantly higher than for C. japonicus. The natural distributions of these two species are discussed in terms of the temperature tolerance.

DOI： 10.1046/j.1444-2906.2002.00491.x

Temporal changes of the density for two crayfish species, the native Cambaroides japonicus (De Haan) and the alien Pacifastacus leniusculus (Dana), in natural habitats of Hokkaido, Japan 査読

T. Kawai, K. Nakata, T. Hamano

Freshwater Crayfish 13 198 - 206 2002年

日本における北米産ザリガニ類の分類および移入状況に関する考察

川井唯史, 中田和義, 小林弥吉

青森自然誌研究 7 ( 7 ) 59 - 71 2002年

北海道然別湖におけるウチダザリガニの分布

中田和義, 田中全, 浜野龍夫, 川井唯史

上士幌町ひがし大雪博物館研究報告 24 27 - 34 2002年

Artificial burrow preference by the Japanese crayfish Cambaroides japonicus 査読国際誌

K Nakata, T Hamano, KI Hayashi, T Kawai, S Goshima

FISHERIES SCIENCE 67 ( 3 ) 449 - 455 2001年6月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：JAPANESE SOC FISHERIES SCIENCE

Preference for artificial burrows by the endangered Japanese crayfish species Cambaroides japonicus was studied to improve its cultivation. The occupation of artificial burrows, which were made from straight polyvinyl chloride pipes of different internal diameters (Y, mm), by crayfishes of different total lengths (X, mm) was significantly (P <0.001, n=56) described by a linear regression: Y= 0.49X + 3.42 (19.0 less than or equal to X less than or equal to 70.2). Among burrows of different lengths [crayfish total length (TL) x 1, x 2, x 3, and x 4], crayfishes significantly preferred burrows that were greater than TL x 3 (P <0.001, n=588).

DOI： 10.1046/j.1444-2906.2001.00281.x

札幌市周辺におけるニホンザリガニCambaroides japonicus (De Haan, 1841) の生息地数の減少状況

川井唯史, 中田和義, 鈴木芳房

札幌市豊平川さけ科学館館報 13 21 - 26 2001年

ニホンザリガニの保全（総説）

川井唯史, 中田和義

帯広百年記念館紀要 19 67 - 78 2001年

ニホンザリガニの生態（総説）

川井唯史, 中田和義

青森自然誌研究 6 1 - 8 2001年

ニホンザリガニの味噌による採集と巣穴利用

川井唯史, 中田和義

青森自然誌研究 6 49 - 52 2001年

北海道十勝地方におけるザリガニ類の分布および個体数密度の経年変化

中田和義, 浜野龍夫, 川井唯史, 平田昌克, 音更川グラウンドワーク研究会, 高倉裕一, 鏡坦, 堤公宏

帯広百年記念館紀要 19 79 - 88 2001年

十勝中部におけるザリガニ類の分布

川井唯史, 中田和義, 平田昌克, 音更川グラウンドワーク研究会

帯広百年記念館紀要 18 1 - 8 2000年

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