Faculty Profiles - NAKATA Kazuyoshi

岡山県におけるカワイワシの分布状況 Reviewed

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

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

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

Reproductive biology of the introduced red-swamp crayfish Procambarus clarkii (Girard, 1852) (Decapoda: Astacidea: Cambaridae) in western Japan Reviewed International journal

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

Journal of Crustacean Biology 43 ( 4 ) 2023.10

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

Habitat preference of the endangered Nagoya Daruma Pond Frog (Pelophylax porosus brevipodus) in paddy levees and fallow paddy fields of Kurashiki, Okayama, western Japan Reviewed

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 Reviewed

水井颯麻, Quang-Tuong Luong, 勝原光希, 中田和義

Cancer 32 19 - 27 2023.10

Masakazu TADA, Yumi MIYAKE, Yoshitaka NAKASHIMA, Kunio ITO, Minoru SAITO, Kazuyoshi NAKATA

Ecology and Civil Engineering 25 ( 2 ) 71 - 85 2023.3

Quantitative PCR method to detect an extremely endangered bitterling fish (Rhodeus atremius suigensis) using environmental DNA Reviewed International journal

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

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

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 Reviewed

中田和義, 三田康祐, 中西毅

農業農村工学会誌 90 ( 8 ) 587 - 590 2022.8

農業水路に適用可能な可搬魚道システムの提案 Reviewed

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 2021.2

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 Reviewed

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 2020.11

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」 Reviewed

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 2020.1

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

Wintering Site Environment for the Nagoya Daruma Pond Frog (Pelophylax porosus brevipodus) in Kurashiki, Okayama Prefecture, Western Japan Reviewed

TADA Masakazu, ITO Kunio, SAITO Minoru, MORI Yasushi, FUKUMASU Jumpei, NAKATA Kazuyoshi

Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 87 ( 2 ) I_179 - I_187 2019

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：公益社団法人農業農村工学会

<p>We conducted field surveys to clarify distribution of the wintering Nagoya Daruma Pond Frog (<i>Pelophylax porosus brevipodus</i>) and the environmental factors affecting wintering site of this species in a rice paddy field and an adjacent fallow paddy field in Kurashiki, Okayama Prefecture, western Japan, where the species inhabits at a high density. The majority of the wintering individuals (34 out of 35) were found in the fallow paddy field. A GLM was fitted using presence and absence of this species as the objective variable, whereas cover rate, plant height, soil pH, volumetric water content, gravimetric water content, degree of saturation, porosity, and topsoil hardness as the explanatory variables. The best model selected based on AIC consisted of soil hardness, cover rate, and the quadratic term of plant height, in which the negative effect of soil hardness was significant. The results insist on the importance of soil hardness and the presence of plants on the topsoil when creating wintering habitat for this frog species in rice paddy fields.</p>

J-GLOBAL

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

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 Reviewed

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

Habitat Preference of Freshwater Fishes Inhabiting an Agricultural Channel with Restoration Methods during the Active and Wintering Seasons Reviewed

KADOWAKI Yuki, KUBOTA Yuka, SANUKI Shigeki, NAKATA Kazuyoshi

Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 85 ( 2 ) II_61-II_70 - II_70 2017

Authorship：Corresponding author Language：Japanese Publisher：The Japanese Society of Irrigation, Drainage and Rural Engineering

Freshwater fishes inhabiting agricultural channels change their distribution area according to the life history stages, and the fish habitat can change among seasons (i.e., reproductive season, growing season and wintering season, etc.). Thus, to evaluate the effectivity of the restoration methods for fish, we have to understand the seasonal difference of habitat preference by fish and then reflect the knowledge to restoration methods in agricultural channel improvements. In this study, we conducted fish samplings in restoration areas, as well as non-restoration areas, of an agricultural channel, to clarify the difference of habitat preference by fish between the active and wintering seasons. The results of multiple regression analysis indicate that important environmental factors for fish habitats are different between the active and wintering seasons and that the factors are the water depth diversity, average water velocity and minimum water velocity in the active season and are the maximum water depth, average water velocity and rate of vegetation in the wintering season. These results indicate that fish inhabitation areas in the agricultural channel are different between the active and wintering seasons. To create restoration areas for fish habitats in agricultural channel improvements, we need to consider the difference of the habitat preference by fish between the active and wintering seasons.

DOI： 10.11408/jsidre.85.II_61

The effectiveness of different colored bottle traps for capturing an invasive crayfish Procambarus clarkii Reviewed

71 ( 2 ) 90 - 101 2017

Habitat preference by the endangered bitterling fish Rhodeus atremius suigensis in an agricultural channel in southern Okayama, western Japan. Reviewed

NAKATA Kazuyoshi, MIYATAKE Yuta, KAWAI Kenta, KOBAYASHI Soma, HAM Seong Nam, SAITO Minoru, AOE Hiroshi

Ecology and Civil Engineering 19 ( 2 ) 117 - 130 2017

Authorship：Lead author,　Corresponding author Language：Japanese Publisher：Ecology and Civil Engineering Society

Rhodeus atremius suigensis is an endangered bitterling species designated as a Nationally Endangered Species of Wild Fauna and Flora by the Ministry of Environment of Japan. In order to create preferable microhabitats for the threatened bitterling in agricultural channels, environmental factors affecting its occurrence need to be identified. The present study investigated environmental preference of the fish inhabiting an agricultural channel in southern Okayama Prefecture, western Japan, through monthly surveys of fishes and physical environments between June 2014 and May 2015. The effects of physical environmental factors on the occurrence of the bitterling were analyzed using generalized linear models （GLM） with binomial probability distribution or generalized estimating equations （GEE）, seasons separately. The best models yielded by model selection based on AIC or QICu revealed seasonal changes in the key environmental factors for the occurrence of the bitterling. The variables with positive effects on the bitterling occurrence included submerged macrophyte coverage during the spring and the summer to autumn period and presence of submerged structures and above-water cover during the winter. Water velocity had a negative effect on the occurrence during the spring and the summer to autumn periods. At the same time, mean hydraulic environment at the locations with the bitterling occurrence was consistent throughout the study period, with water velocity less than 11.5 cm/s （3.4 cm/s on average） and water depth ranging 20-50 cm （37.7 cm on average）. The findings insist on the importance of the above mentioned lentic environment, in addition to covering materials represented by submerged structures and above-water cover, when creating preferable microhabitats for the bitterling in agricultural channels.

DOI： 10.3825/ece.19.117

Effects of Invasive Crayfish Species on Native Ecosystem in Aquatic Environments of Urban Areas of Japan

Utilization of artificial spawning beds by endangered bitterling fish in an agricultural channel in southern Okayama, western Japan Reviewed

Kazuyoshi Nakata, Soma Kobayashi, Ippei Kawamoto, Yuta Miyatake, Hiroshi Aoe

Ecology and Civil Engineering 20 ( 1 ) 33 - 41 2017

“楊貴妃メダカ”におけるカルテノイドについて Reviewed

塩出雄亮, 中田和義

水産増殖 65 ( 3 ) 203 - 208 2017

Movement patterns of freshwater fish in restoration areas in an agricultural channel, Southern Okayama, Western Japan, in relation to effectiveness for fish conservation Reviewed

Kubota Yuka, Kadowaki Yuki, Sanuki Shigeki, Nakata Kazuyoshi

Ecology and Civil Engineering 20 ( 2 ) 213 - 219 2017

Shelter preference for the Japanese mitten crab Eriocheir japonica: A field experiment in a river, southern central Japan Reviewed

Takayasu Yonezawa, Minoru Saito, Tadashi Yamashiro, Tatsuo Hamano, Kazuyoshi Nakata

Ecology and Civil Engineering 19 ( 1 ) 1 - 11 2016

A mutant of medaka with blue metallic iridescence caused by iridophores Reviewed

Yusuke Shiode, Kazuyoshi Nakata

NIPPON SUISAN GAKKAISHI 82 ( 4 ) 628 - 630 2016

57 ( 7 ) 519 - 524 2015

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

Saito Minoru, Hamano Tatsuo, Nakata Kazuyoshi

Crustacean Research 44 39 - 53 2015

Language：English Publisher：Carcinological Society of Japan

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

Artificial burrow sizes for capturing the North American invasive crayfish Procambarus clarkii. Reviewed

Other Link： https://jlc.jst.go.jp/DN/JLC/20017078595?from=CiNii

Capture of the North American invasive crayfish Procambarus clarkii by using artificial burrows of preferred sizes Reviewed

Haruna Ushimi, Rika Shiraishi, Kazuyoshi Nakata

Ecology and Civil Engineering 18 ( 2 ) 139 - 145 2015

USHIMI Haruna, MIYATAKE Yuta, TSUTSUI Naoaki, SAKAMOTO Tatsuya, NAKATA Kazuyoshi

Ecology and Civil Engineering 18 ( 2 ) 79 - 86 2015

Authorship：Corresponding author Language：Japanese Publisher：Ecology and Civil Engineering Society

We conducted aquarium experiments of artificial burrow preference by the North American invasive crayfish Procambarus clarkii to clarify the artificial burrow sizes for capturing P. clarkii in invaded freshwater areas （e.g., paddy fields, agricultural channels, rivers, lakes, ponds, etc.）. In the aquarium experiments, we observed the preference for internal diameters and lengths of artificial burrows by P. clarkii, which were made from straight polyvinyl chloride pipes. The relationship between the total length （TL）（X, mm） of P. clarkii and the preferred internal diameter （Y, mm） of artificial burrows was described by the significant linear regression: Y＝0.58X＋4.26（ n＝49, P＜0.001）. Among the artificial burrows of different lengths, TL×4 burrows were mainly preferred by P. clarkii. Based on these results, we propose artificial burrow sizes for use to eradicate P. clarkii.

DOI： 10.3825/ece.18.79

Specimens of the Japanese native crayfish Cambaroides japonicus (De Haan, 1841) and ectosymbiotic crayfish worms (Branchiobdellida) collected from Lake Akan in Hokkaido, northern Japan, in 1872: observation of the specimens preserved by Dr. Saburo Hatta Reviewed

Cage traps and baits for capturing the North American invasive crayfish Procambarus clarkii Reviewed

Rika Shiraishi, Haruna Ushimi, Kazuyoshi Nakata

Ecology and Civil Engineering 18 ( 2 ) 115 - 125 2015

NAKATA Kazuyoshi, NAGANO Yuki, OHASHI Shinpei, KAWAI Toshio, OHTAKA Akifumi

Japanese Journal of Benthology 69 ( 2 ) 90 - 94 2014

Authorship：Lead author,　Corresponding author Language：English Publisher：JAPANESE ASSOCIATION OF BENTHOLOGY

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

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

Other Link： https://jlc.jst.go.jp/DN/JLC/20006922885?from=CiNii

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

Crustacean Research 41 27 - 46 2012

Established Habitats and Origin of the Invasive Signal Crayfish Pacifastacus leniusculus in Akashina, Azumino City, Nagano Prefecture, Japan Reviewed

KUMAKAWA Shinji, NAKATA Kazuyoshi, KAWAI Tadashi

Plankton and Benthos Research 66 ( 1 ) 26 - 32 2011

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

Feeding Traces on the Kelp Laminaria religiosa by Four Species of Small Herbivorous Gastropods Reviewed

Other Link： https://jlc.jst.go.jp/DN/JALC/00381242488?from=CiNii

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

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

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

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

CRUSTACEANA 83 ( 9 ) 1125 - 1133 2010.9

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 Reviewed International journal

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

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

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 Reviewed

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

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 Reviewed

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

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 Reviewed

傳田正利, 天野邦彦, 中田和義

河川技術論文集 15 25 - 30 2009

Factors affecting the interval between clutches in the hermit crab Pagurus nigrivittatus Reviewed International journal

Satoshi Wada, Takashi Oba, Kazuyoshi Nakata, Atsushi Ito

MARINE BIOLOGY 154 ( 3 ) 501 - 507 2008.5

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 Reviewed

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

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

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

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

Crustacean Research 37 67 - 73 2008

Distribution and control status of the invasive signal crayfish (Pacifastacus leniusculus) in Japan Reviewed

N. Usio, Kazuyoshi Nakata, Tadashi Kawai, Satoshi Kitano

Japanese Journal of Limnology 68 ( 3 ) 471 - 482 2007.12

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

Keiko Ideguchi, Tatsuo Hamano, Kazuyoshi Nakata

FISHERIES SCIENCE 73 ( 4 ) 961 - 963 2007.8

Zoogeography of crayfishes in Japan and expected changes in future distribution Reviewed

Biological science 58 ( 2 ) 115 - 123 2007

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 Reviewed

Kazuyoshi Nakata, Seiji Goshima

JOURNAL OF CRUSTACEAN BIOLOGY 26 ( 2 ) 134 - 140 2006.5

NAKATA Kazuyoshi, YAMAZAKI Tomoyasu, MIZUTA Hiroyuki, KAWAI Tadashi, ITO Hiroshi, GOSHIMA Seiji

Aquaculture Science 54 ( 2 ) 217 - 224 2006

Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Aquaculture Science

To clarify the effects of small herbivorous gastropods on the kelp Laminaria religiosa, we examined feeding traces left on the kelp by gastropods, and the morphology of gastropod radula. We conducted laboratory experiments with four species of the small herbivorous gastropods, Chlorostoma lischkei, Omphalius rusticus rusticus, Homalopoma amussitatum and Littorina sitkana, which frequently occur in habitats of L. religiosa in Hokkaido, Japan, to examine feeding traces left on a sheet of kelp gametophytes settled on styrene chambers or glass slides. In the experiments, all gastropod species fed on the kelp gametophytes both on the styrene chamber and the glass slide. We observed species-specific differences in feeding traces among gastropod species that were considered to be because of differences in the species-specific morphology and size of their radula and differences in feeding patterns. We observed similar traces in adult L. religiosa collected from its natural habitat in Esashi, Hokkaido, to those in our laboratory experiments, suggesting that the four gastropod species used in this study feed on the surface of the adult kelp.

DOI： 10.11233/aquaculturesci1953.54.217

Effect of Grazing by Small Herbivorous Gastropods on the Kelp Laminaria religiosa at Different Water Temperatures Reviewed

Negative effects of the invasive brown trout Salmo trutta on freshwater crustacean species: Predation on the endangered Japanese endemic crayfish species Cambaroides japonicus by the trout Reviewed

Kazuyoshi Nakata, Seiji Goshima, Toshiyasu Nakaoka

Nippon Suisan Gakkaishi (Japanese Edition) 72 ( 3 ) 447 - 449 2006

外来種ウチダザリガニに対する児童と大人の認識 Reviewed

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

NAKATA Kazuyoshi, YAMAZAKI Tomoyasu, MIZUTA Hiroyuki, KAWAI Tadashi, ITO Hiroshi, GOSHIMA Seiji

Aquaculture Science 54 ( 3 ) 375 - 381 2006

Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Aquaculture Science

We made two laboratory experiments with small herbivorous gastropods Omphalius rusticus rusticus and Chlorostoma lischkei that frequently live in the habitats of the kelp Laminaria religiosa in southwest Hokkaido, Japan, to examine the effect of their grazing on L. religiosa at different water temperatures. In an experiment to find if O. rusticus rusticus feeds on a sheet of kelp gametophytes settled on styrene chambers or on glass slides at 5°C, 10°C and 15°C, O. rusticus rusticus fed on the kelp gametophytes even at the lowest water temperature, but food consumption increased as the water temperature increased. In an experiment to find if the two gastropod species feed on juvenile kelp sporophytes at 10°C and 15°C, many individuals of C. lischkei actively fed on juvenile kelp sporophytes at both water temperatures, but most individuals of O. rusticus rusticus showed no preference regardless of water temperature. Our results suggest that the potential impact of gastropod grazing on L. religiosa might differ between these gastropod species and water temperatures.

DOI： 10.11233/aquaculturesci1953.54.375

Larval Drift and Juvenile Recruitment of Amphidromous Freshwater Shrimps (Decapoda: Caridea) in the Nishida River, Western Japan Reviewed

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

K Nakata, K Tsutsumi, T Kawai, S Goshima

CRUSTACEANA 78 ( 11 ) 1389 - 1394 2005.12

New records and distributions of two North American branchiobdellidan species (Annelida : Clitellata) from introduced signal crayfish, Pacifastacus leniusculus, in Japan Reviewed International coauthorship International journal

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

BIOLOGICAL INVASIONS 7 ( 2 ) 149 - 156 2005.3

HAMANO Tatsuo, IDEGUCHI Keiko, NAKATA Kazuyoshi

Aquaculture Science 53 ( 4 ) 439 - 446 2005

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Aquaculture Science

To clarify the early ecology of amphidromous freshwater shrimps, larval drift in the freshwater area, larval distribution near the mouth of the river, and juvenile recruitment at the uppermost part of the tidal river area were studied in the Nishida River, western Japan. Juvenile recruitment was investigated by using artificial weed as settlement sites. In the river, zoeae of four shrimp species were collected within a short period after sunset, and all zoeae were in the first zoeal stage. About six million zoeae were estimated to pass downstream into the sea in 1998, but few zoeae were captured in the sea near the mouth of the river. Juveniles of three shrimp species, which have not previously been sampled in the river, were collected at the upper end of estuary. These results suggest that amphidromous freshwater shrimps widely disperse through the open sea and some juveniles migrate to other far rivers.

DOI： 10.11233/aquaculturesci1953.53.439

Structure and Artificial Baits for Cage Traps to Capture Freshwater Palaemonid Shrimps Reviewed

NAKATA Kazuyoshi, WADA Nobuhiro, ARAKI Akira, HAMANO Tatsuo

Aquaculture Science 53 ( 3 ) 263 - 274 2005

Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Aquaculture Science

Structure and artificial baits for shrimp cage traps were studied to develop an effective method to capture freshwater palaemonid shrimps. We examined the effect of (i) artificial weed as shelter within the trap, (ii) the entrance diameter of the trap, and (iii) artificial baits that were developed as useful baits for a crab cage trap in a previous study on the capture efficiency of the shrimp trap. The artificial weed within the shrimp trap had no effect to increase the number of the palaemonid shrimps captured per trap, but the difference of the entrance diameter of the shrimp trap affected the total catch. The capture efficiency of palaemonid shrimps was higher in the shrimp traps with the entrance diameter of 40mm and 50mm compared with 31mm and the crab cage trap. An appropriate diameter of the shrimp trap was considered to be 40mm in terms of preventing the capture of Japanese mitten crab (Eriocheir japonica), which may cause decreases of the catches of the palaemonid shrimps as the crab often damages the shrimp trap. Both artificial bait 1 (formula feed used for eel culture; 100g) and bait 2 (bait 1 (80g) + both diet coated with squid entrail extract (20g) and krill extract (20g) ) were considered to be useful for the trap of the palaemonid shrimps and to be as effective as frozen saury (Cololabis saira) . To efficiently capture palaemonid shrimps we should use the shrimp trap with an entrance diameter of 40mm using bait 1 that is cheaper than bait 2. The results of field experiments at eight rivers, three lakes and one marsh demonstrated that the shrimp trap with the entrance size of 40mm and bait 1 can be effective to capture not only the palaemonid shrimps but other freshwater shrimps and crayfish.

DOI： 10.11233/aquaculturesci1953.53.263