|Norio Onikura||Last modified date：2021.05.25|
Professor / Devision of Animal and Mairne Biosciences / Department of Bioresource Sciences / Faculty of Agriculture
|Norio Onikura||Last modified date：2021.05.25|
|1.||Akihiko Koyama, Taiga Hirata, Yuki Kawahara, Hiroki Iyooka, Haruka Kubozono, Norio Onikura, Shinji Itaya, Tomoko Minagawa, Habitat suitability maps for juvenile tri-spine horseshoe crabs in Japanese intertidal zones: A model approach using unmanned aerial vehicles and the Structure from Motion technique, PLOS ONE, 10.1371/journal.pone.0244494, 15, 12, 2020.12.|
|2.||Keitaro Umemura, Yoshihisa Kurita, Norio Onikura, Novel genotyping system for distinguishing among native, non-native and admixed individuals of rosy bitterling Rhodeus ocellatus subspecies, JOURNAL OF FISH BIOLOGY, 10.1111/jfb.14333, 96, 6, 1516-1522, 2020.06.|
|3.||Akihiko Koyama, Ryutei Inui, Norio Onikura, Yoshihisa Akamatsu, Tomoko Minagawa, Habitat Characterization Based on Crab Fauna in the Temperate Estuarine Intertidal Zone of the Seto Inland Sea, Japan, Estuaries and Coasts, 10.1007/s12237-020-00725-0, 21, 641-652, 2020.03, Although crabs are effective indicator species for evaluating the health of estuarine environments, the relationship between crab communities and environmental conditions in temperate river estuaries is poorly investigated. This study aimed to clarify the physicochemical factors that affect crab fauna in temperate areas, as well as classify and characterize habitat based on the similarity of crab fauna. Data of crab fauna and physicochemical environmental factors were collected at 199 sites in two temperate rivers. These survey sites were spatially arranged to cover the estuarine zone (i.e., tidal freshwater to polyhaline water) and the intertidal zone (i.e., the high tide to low tide line). The result of a direct gradient analysis showed that salinity and median particle size, in particular, affected crab fauna. Moreover, the survey sites were classified into seven groups based on the similarity of crab fauna, which were modeled with moderate accuracy using three variables: salinity, elevation, and percentage of silt. From these variables, we were able to identify seven different habitat types: salt marshes covered with fine or coarse sediment, upstream zones with gravelly sediment, intermediate zones between salt marshes and tidal flats, sand tidal flats with scattered hard structures, monotonous sand flats, and mud flats. Our findings suggest that maintaining the salinity gradient and diversity of sediment grain size is necessary to conserve crab species diversity in temperate river estuaries. Effective ecosystem conservation in these areas needs to take into account the physicochemical conditions in the seven identified habitat types..|
|4.||Akihiko Koyama, Ryutei Inui, Yoshihisa Akamatsu, Norio Onikura, Physicochemical factors affecting goby fauna in the intertidal zones of temperate riverine estuaries of the Seto Inland Sea, Estuarine, Coastal and Shelf Science, 10.1016/j.ecss.2019.01.010, 219, 24-32, 2019.04, Estuaries are important environments for the sustainable use of natural resources; however, these coastal areas are deteriorating continuously owing to anthropogenic impact, and thus their conservation has become a global issue. This study aimed to identify the physicochemical factors that influence goby fauna and richness, which have high species diversity in temperate riverine estuaries, by conducting field surveys. We collected gobies and measured six physicochemical factors (median particle size; percentage of gravel, sand, and mud; salinity; and elevation) in the intertidal zone of two riverine estuaries flowing into the Seto Inland Sea of Japan. Twenty-six species of gobies were found at 191 sites during our surveys. To classify the survey sites by goby fauna, we stratified 132 sites, where more than two species of goby were found, into seven groups by using two-way indicator species analysis. The results of canonical correspondence analysis and classification and regression tree suggested that the goby fauna changed along these physicochemical environmental gradients. In particular, sediment characteristics might be an important factor that influences the goby fauna. However, no relationship was found between species richness of gobies, as revealed by the result of generalized linear mixed model. Therefore, our data indicate that species diversity of gobies utilising various environments cannot be maintained by conservation of a specific environment in riverine estuaries. The diversity and heterogeneity of the physicochemical environments, especially sediment conditions, need to be maintained and controlled for the conservation of the gamma diversity of estuarine goby..|
|5.||Yuichi Kano, Yoshihisa Kurita, Kazuki Kanno, Kengo Saito, Hironori Hayashi, Norio Onikura, Takeshi Yamasaki, Photo images, 3D/CT data and mtDNA of the freshwater mussels (Bivalvia: Unionidae) in the Kyushu and Ryukyu Islands, Japan, with SEM/EDS analysis of the shell, Biodiversity Data Journal, e32114, 2019.01.|
|6.||Nian Hong Jang-Liaw, Koji Tominaga, Chungung Zhang, Yahui Zhao, Jun Nakajima, Norio Onikura, Katsutoshi Watanabe, Phylogeography of the Chinese false gudgeon, Abbottina rivularis, in East Asia, with special reference to the origin and artificial disturbance of Japanese populations, Ichthyological Research, 10.1007/s10228-019-00686-w, 2019.01, The Chinese false gudgeon, Abbottina rivularis, is a common cyprinid fish that is widely distributed throughout continental East Asia, but exhibits a restricted, discontinuous distribution in western Japan, including Honshu and Kyushu islands. In this study, analyses of mitochondrial (cytochrome b) and nuclear (glyt, myh6, and RAG1) genes were conducted to investigate patterns and magnitudes of intraspecific differentiation among A. rivularis populations in Japan and adjacent continental areas. Phylogenetic analysis of the mitochondrial gene sequences resolved four major lineages—the Japan lineage (JL), a northern continental lineage (NCL), and two southern continental lineages (SCL1 and SCL2)—with uncorrected pairwise sequence distances of 9.4–15.2% (estimated divergence times, 7.9–17.1 Myr). Two lineages (JL and SCL1) occurred in both the Honshu and Kyushu districts of Japan. Compared with populations in continental areas, most Japanese populations exhibited less genetic diversity. The JL was divided into two well-differentiated sub-lineages distributed on Honshu and Kyushu islands, respectively. Kyushu Island, as well as areas on Honshu where the species is known to have been introduced, also harbored the SCL1 lineage, which constituted most of the populations on Kyushu. The applied nuclear DNA data strongly suggest that hybridization between the Japan and continental lineages has occurred on Kyushu Island. The artificial introduction hypothesis, instead of a two-origin scenario, best explains the origin of the SCL1 in Japan..|
|7.||Kazuki Kanno, Norio Onikura, Yoshihisa Kurita, Akihiko Koyama, Jun Nakajima, Morphological, distributional, and genetic characteristics of Cottus pollux in the Kyushu Island, Japan
indication of fluvial and amphidromous life histories within a single lineage, Ichthyological Research, 10.1007/s10228-018-0637-4, 65, 4, 462-470, 2018.11, We evaluated the morphological, distributional, and genetic characteristics of the freshwater sculpin, Cottus pollux, in Kyushu Island, Japan. Based on pectoral fin ray number, the sculpins inhabiting 30 rivers were divided into two types [modes 13 (M13) and 15 (M15)]. We evaluated four environmental parameters: length of main river (L-MR), average gradient of main river (G-MR), distance from sampling site to river mouth (D-SM), and gradient around sampling site (G-S), and compared the two types. L-MR, D-SM, and G-S were significantly larger for the rivers that contained M13 fish than for those containing M15 fish. M13 individuals were distributed in the upstream areas of large river systems, suggesting a fluvial life history, whereas M15 individuals were distributed in the downstream areas of small river systems, indicating an amphidromous life history. We conducted phylogenetic analysis based on mitochondrial 12S rRNA [788 base pair (bp)] and control regions (386 bp). Mitochondrial DNA analysis showed that both M13 and M15 groups were genetically of C. pollux middle-egg type (ME). Our findings proposed the hypothesis that C. pollux ME in Kyushu Island exhibits dimorphism in both morphological and distributional traits. Additionally, haplotype distribution indicated that the fluvial M13 populations had higher genetic specificity in each river in contrast to the existence of one genetic group of amphidromous M15 individuals in Kyushu Island..
|8.||Shigeru Kitanishi, Norio Onikura, Takahiko Mukai, A simple SNP genotyping method reveals extreme invasions of non-native haplotypes in pale chub Opsariichthys platypus, a common cyprinid fish in Japan, PLoS One, 10.1371/journal.pone.0191731, 13, 1, 2018.01, Biological invasion by non-native subspecies or populations is one of the most serious threats to ecosystems, because these species might be easily established in the introduced area and can negatively affect native populations through competition and hybridization. Pale chub Opsariichthys platypus, one of the most common fish in East Asia, exhibits clear genetic differentiation among regional populations; however, introgression and subsequent loss of genetic integrity have been occurring throughout Japan due to the artificial introduction of non-native conspecifics. In this study, we developed a simple SNP genotyping method to discriminate between native and non-native mitochondrial DNA (mtDNA) haplotypes in pale chub using real-time PCR assay. We then investigated the distribution patterns of non-native pale chub in Tokai region, located in the center of Honshu Island, Japan and developed a predictive model of the occurrence of non-natives to reveal the factors influencing their invasion. The specificity and accuracy of the genotyping method were confirmed by using samples whose haplotypes were determined previously. Extensive occurrence of non-native haplotypes in Tokai region was detected by this method. In addition, our models suggested that the presence of non-natives varied greatly depending on the river system, and was positively influenced by the impounded water areas. Our method could accurately distinguish between native and non-native haplotypes of pale chub in Japan and suggested key environmental factors associated with the presence of non-natives. This approach can greatly reduce experimental costs be a great contribution for quantitative investigation..|
|9.||Takaaki Shimizu, Kimiyoshi Narita, Norio Onikura, Rapid detection of alien DNA in the loach genus Misgurnus (family Cobitidae) using real-time PCR, Ichthyological Research, 10.1007/s10228-017-0609-0, 1-6, 2017.11.|
|10.||Yumi Henmi, Katsuhisa Eguchi, Ryutei Inui, Jun Nakajima, Norio Onikura, Gyo Itani, Field survey and resin casting of Gymnogobius macrognathos spawning nests in the Tatara River, Fukuoka Prefecture, Japan, Ichthyological Research, 10.1007/s10228-017-0590-7, 65, 1, 168-171, 2018.01, We investigated the spawning nests of Gymnogobius macrognathos on a tidal flat in the Tatara River, Fukuoka Prefecture, Japan. Digging uncovered 19 spawning nests. The number of eggs and the standard length of the guarding male were positively correlated. Nine spawning nests were examined using in situ resin casting. All casts had structures characteristic of callianassid shrimp burrows and were most likely those of Nihonotrypaea japonica. Spawning nests had significantly greater average diameters than shrimp burrow openings and may have been widened by G. macrognathos..|
|11.||Akihiko Koyama, Ryutei Inui, Keitaro Umemura, Mizuki Wakabayashi, Kazuki Kanno, Norio Onikura, The first record of the spawning nest of Gymnogobius cylindricus and Gymnogobius macrognathos, Ichthyological Research, 10.1007/s10228-016-0548-1, 64, 2, 261-263, 2017.04.|
|12.||Koyama Akihiko, Inui Ryutei, Sawa Kaito, Onikura Norio, Symbiotic partner specificity and dependency of two gobies (Apocryptodon punctatus and Acentrogobius sp A) and four alpheid shrimps inhabiting the temperate estuary of southern Japan, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-016-0535-6, 64, 1, 131-138, 2017.01.|
|13.||Kitanishi Shigeru, Hayakawa Akari, Takamura Kenji, Nakajima Jun, Kawaguchi Yoichi, Onikura Norio, Mukai Takahiko, Phylogeography of Opsariichthys platypus in Japan based on mitochondrial DNA sequences, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-016-0522-y, 63, 4, 506-518, 2016.11.|
|14.||Kurita Yoshihisa, Onikura Norio, Phenotypic shift of an alien piscivorous chub following translocation from a large lake to small irrigation ditches, ECOLOGICAL RESEARCH, 10.1007/s11284-016-1380-9, 31, 5, 731-738, 2016.09.|
|15.||Onikura Norio, Nakajima Jun, Inui Ryutei, Kaneto Jun, Priority maps for protecting the habitats of threatened freshwater fishes in urban areas: a case study of five rivers in the Fukuoka Plain, northern Kyushu Island, Japan, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-015-0504-5, 63, 3, 347-355, 2016.07.|
|16.||Koyama Akihiko, Inui Ryutei, Iyooka Haruki, Akamatsu Yoshihisa, Onikura Norio, Habitat suitability of eight threatened gobies inhabiting tidal flats in temperate estuaries: model developments in the estuary of the Kuma River in Kyushu Island, Japan, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-015-0490-7, 63, 2, 307-314, 2016.04.|
|17.||Okawa Takuya, Kurita Yoshiyisa, Kanno Kazuki, Onikura Norio, Molecular analysis of the distributions of the invasive Asian clam, Corbicula fluminea (Müller), and threatened native clam, C. leana (Prime), on Kyushu Island, Japan, BioInvasions Records, 10.3391/bir.2016.5.1.05, 5, 25-29, 2016.03.|
|18.||Nakajima Jun, Onikura Norio, Spawning behaviour and male mating success of Pike Gudgeon, Pseudogobio esocinus (Cypriniformes, Cyprinidae), in an experimental tank, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-015-0470-y, 63, 1, 39-45, 2016.01.|
|19.||Nakajima Jun, Onikura Norio, Life history of Pike Gudgeon, Pseudogobio esocinus (Cypriniformes, Cyprinidae): differences between the upper and lower reaches in a single river, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-015-0472-9, 63, 1, 46-52, 2016.01.|
|20.||Greshishchev Vladmir, Onikura Norio, Iyooka Hiroki, Environmental factors influencing fish species distribution in irrigation channels around Ariake Sea, Kyushu, Japan, Irrigation & Drainage Systems Engineering, 10.4172/2168-9768.1000139, 4(2)：139, 2015.11.|
|21.||Nakajima Jun, Onikura Norio, Larval and juvenile development of Pike Gudgeon, Pseudogobio esocinus (Cyprinidae: Gobioninae), ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-014-0436-5, 62, 3, 268-273, 2015.04.|
|22.||Onikura Norio, Site selection for habitat conservation/restoration of threatened freshwater fishes in artificial channels of northern Kyushu Island, Japan, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-014-0427-6, 62, 2, 197-206, 2015.01.|
|23.||Kurita Yoshihisa, Inui Ryutei, Onikura Norio, Factors affecting the establishment success of the invasive piscivorous chub in small irrigation ditches in northern Kyushu, Japan, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-014-0407-x, 61, 4, 393-398, 2014.11.|
|24.||Watanabe Katsutoshi, Mori Seiichi, Tanaka Tetsuo, Kanagawa Naoyuki, Itai Takahiko, Kitamura Jyun-ichi, Suzuki Noriyasu, Tominaga Koji, Kakioka Ryo, Tabata Ryoichi, Abe Tsukasa, Tashiro Yushu, Hashimoto Yoshiki, Nakajima Jun, Onikura Norio, Genetic population structure of Hemigrammocypris rasborella (Cyprinidae) inferred from mtDNA sequences, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-014-0406-y, 61, 4, 352-360, 2014.11.|
|25.||Norio Onikura, Performance of a species distribution model based on presence/absence for various population sizes in the amphidromous fish species Sicyopterus japonicus, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-013-0375-6, 61, 1, 90-96, 2014.01.|
|26.||Norio Onikura, Potential distribution of Tridentiger barbatus (Gunther 1861) and Tridentiger nudicervicus (Tomiyama 1934) in the Seto Inland Sea, western Japan, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-013-0370-y, 61, 1, 83-89, 2014.01.|
|27.||Shinji FUKUDA, De Baets B, Norio Onikura, Nakajima J, Mukai T, Mouton A, Modelling the distribution of the pan-continental invasive fish Pseudorasbora parva based on landscape features in the northern Kyushu Island, Japan, AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS, 10.1002/aqc.2336, 23, 6, 901-910, 2013.12.|
|28.||Kosuke Hayashi, Eun Jin Kim, Norio Onikura, Growth and habitat use of the Chinese false gudgeon, Abbpttina rivularis, in and irrigation channel near the Ushizu River, northern Kyushu Island, Japan, Ichthyological Research, 60, 218-226, 2013.07.|
|29.||Onikura Norio, Miyake Takuya, Nakajima Jun, Shinji FUKUDA, Kawamoto Tomonori, Kawamura Koichi, Predicting potential hybridization between native and non-native Rhodeus ocellatus subspecies: The implications for conservation of a pure native population in northern Kyushu, Japan, Aquatic Invasions, 8, 219-229, 2013.06.|
|30.||Onikura Norio, Nakajima Jun, Age, growth and habitat use of the topmouth gudgeon, Pseudorasbora parva in irrigation ditches on northwestern Kyushu Island, Japan, JOURNAL OF APPLIED ICHTHYOLOGY, 10.1111/j.1439-0426.2012.02041.x, 29, 1, 186-192, 2013.02.|
|31.||Onikura Norio, Inui Ryutei, Oikawa Shin, Path of the Kuroshio Current affects the presence of several goby species in the brackish water area in northeastern Kyushu Island, Japan: results of a decade-long survey in the Kita River, ICHTHYOLOGICAL RESEARCH, 10.1007/s10228-012-0305-z, 60, 1, 98-101, 2013.01.|
|32.||Onikura N, Nakajima J, Miyake T, Kawamura K, Fukuda S, Predicting the distribution of seven bitterling species inhabiting northern Kyushu Island, Japan, Ichthyol Res, 59, 124-133, 2012.04, The distributions of seven bitterling species and subspecies—Tanakia lanceolata, T. limbata, Acheilognathus tabira nakamurae, A. rhombeus, Rhodeus ocellatus kurumeus, R. ocellatus ocellatus, and R. atremius atremius— in northern Kyushu were predicted using generalized linear models (GLMs) in order to provide information helpful for conserving native bitterlings and preventing the expansion of alien bitterling species. Predictions were made according to the following procedure: (1) a set of GLMs for each species was formulated using environmental data from 710 sites that were derived using digital maps and GIS software, from which the best fit model for each species was selected using the Akaike information criterion for predicting the fish occurrence, (2) model performance was evaluated based on the receiver-operating characteristics (ROC) analysis using occurrence and environmental data from 362 sites, and (3) potential distributions of the bitterling were analyzed using the best fit models and environmental data for 1,272 sites, of which 200 data points without occurrence data were prepared. The best fit models revealed that 4–6 environmental factors were important in predicting seven bitterling distributions, which was supported by the area under the ROC curve (AUC) values of these fishes ranging from 0.753 to 0.927. The AUC values in model evaluation were significantly greater than 0.5 for six fishes, suggesting the moderate accuracies of these best fit models for predicting the fish distributions. These predictive models can be used for evaluating potential native bitterling richness and the potential distribution expansion of an alien subspecies..|
|33.||Masaaki Chiwa, Norio Onikura, Impact of N-Saturated Upland Forests on Downstream N Pollution in the Tatara River Basin, Japan, ECOSYSTEMS, 10.1007/s10021-011-9505-z, 15, 2, 230-241, 2012.03.|
|34.||Nakajima J, Ohata T, Onikura N, Longitudinal distribution patterns of three spined loach species (Cobitidae, Cobitis) in the Onga River system, northern Kyushu Island, Japan, Folia Zoologica, 66, 322-327, 2011.12.|
|35.||Kim EJ, Nakajima J, Onikura N, Habitat selection during spawning season of the spined loach, Cobitis sp. ‘yamato’ complex, in the Kyushu Island, Japan, Folia Zoologica, 66, 315-321, 2011.12.|
|36.||Kim EJ, Kim I, Onikura N, Size-related changes in food of dwarf loach, Kichulchoia brevifasciata (Kim and Lee, 1995), Folia Zoologica, 66, 295-301, 2011.12.|
|37.||Onikura N, Nakajima J, Inui R, Mizutani H, Kobayakawa M, Fukuda S, Mukai T, Evaluating the potential of invasion by non-native freshwater fishes in northern Kyushu Island, Japan, using the Fish Invasiveness Scoring Kit, Ichthyol. Res．, 58, 382-387, 2011.11.|
|38.||Miki S, Ikeda K, Oba Y, Satone H, Honda M, Shimazaki Y, Onikura N, Arakawa O, Oshima Y, Tributyltin in blood of marine fish collected from a coastal area of northern Kyushu, Japan, Mar. Pollut. Bull., 62, 2533-2536, 2011.06.|
|39.||Miyake T, Nakajima J, Onikura N, Ikemoto S, Iguchi K, Komaru A, Kawamura K, The genetic status of two subspecies of Rhodeus atremius, an endangered bitterling in Japan. , Conserv. Genet., 12, 383-400, 2011.04.|
|40.||Onikura N., Nakajima J., Kouno H., Sugimoto Y., Kaneto J, Maturation and Growth in the Wild Population of Hemigrammocypris rasborella, Aquaculture Science, 58, 2010.06.|
|41.||Sato M, Kawaguchi Y, Nakajima J, Mukai T, Shimatani Y, Onikura N, A review of the research on introduced freshwater fishes: new perspectives, the need for research, and management implications, Landscape Ecol. Eng., 6, 99-108, 2010.03.|
|42.||Inui R., Nishida T., Onikura N., Eguchi K., Kawagishi M., Nakatani M., Oikawa S, Physical factors influencing immature-fish communities in the surf zones of sandy beaches in northwestern Kyushu Island, Japan, Estuarine, Coastal and Shelf Science, 86, 467-476, 2010.02.|
|43.||Inui R., Onikura N., Kawagishi M., Nakatani M., Tomiyama Y., Oikawa S, Selection of spawning habitat by several gobbid fishes in the subtidal zone of a small temperate estuary, Fisheries Science, 76, 83-91, 2010.01.|
|44.||Onikura N, Nakajima J, Kouno H, Sugimoto Y, Kaneto J, Habitat Use in Irrigation Channels of the Golden Venus Chub (Hemigrammocypris rasborella) at Different Growth Stages , Zoological Science, 26: 375-381, 2009.06.|
|45.||Onikura N., Nakajima J., Nishida T., Inui R., Eguchi K., Nakatani M., and Oikawa S., Spawning sites and nests of Eleotris acanthopoma (Perciformes: Eleotridae) in eastern Kyushu Island, Japan.
, Ichthyological Research , 56: 105-107, 2009.01.
|46.||Kurita Y., Nakajima J., Kaneto J., Onikura N., Analysis of the Gut Contents of the Internal Exotic Fish Species Opsariichthys uncirostris uncirostris in the Futatsugawa River, Kyuhsu Island, Japan. , J. Fac. Agr. Kyushu Univ., 53(2): 429-433.
|47.||Onikura N, Nakamura A., Kishi K., Acute toxicity of thallium and indium toward brackish-water and marine organisms. , J. Fac. Agr. Kyushu Univ, 53(2): 467-469.
|48.||Nakajima J., Onikura N., Kitagawa E., Kitagawa T., Oikawa S., Distribution pattern of Cobitis (Telostei : Cobitidae) in northern Kyushu Island, Japan. , FOLIA ZOOLOGICA, 57,10-15, 2008.08.|
|49.||Nishida T., Inui R., Onikura N., A note on the spawning bed of Pseudoblennius percoides (Scorpaeniformes, Cottidae) in shallow sea areas around coastal Fukutsu, northern Kyushu Island, Japan., Biogeography , 10,45-51, 2008.08.|
|50.||Onikura N., Inui R., Eguchi K., Nishida T., Nakajima J. , Spawning site of “KUROKO-HAZE” Drombus sp. in eastern Kyushu Island, Japan: New record from the field.
, Biogeography , 10,13-16, 2008.08.
|51.||Nakajima J., Onikura N., Oikawa S., Habitat of the pike gudgeon Pseudogobio esocinus esocinus in the Nakagawa River, northern Kyushu, Japan．
, Fisheries Science, 74,842-845, 2008.08.
|52.||T. Nishida, A. Matsunaga, N. Onikura, S. Oikawa, A. Nakazono, Fish fauna associated with drifting seaweeds in the Chikuzen Sea, northern Kyushu, Japan., Fisheries Science, 74,285-292, 2008.04.|
|53.||Onikura N., Kishi K., Nakamura A., Takeuchi S. , A screening methods for toxicity identification evaluation on an industrial effluent using
Chelex-100® resin and chelators for specific metals.
, Environ. Toxicol. Chem. , 27, 2008.02.
|54.||K. Eguchi, R. Inui, J. Nakajima, T. Nishida, N. Onikura, S. Oikawa, Geographical distribution of two endangered goby species, Gymnogobius uchidai and G. macrognathos (Perciformes, Gobiidae), in the Kyushu Islands, Japan, Biogeography, 9: 41-47, 2007.08.|
|55.||N. Onikura, N. Takeshita, S. Matsui, S. Kimura, Sexual differences of maturation periods and estimation of spawning frequency of the roughskin sculpin Trachidermus fasciatus, Fisheries Science, 73:733-736, 2007.07.|
|56.||N. Onikura, A. Nakamura, K. Kishi, K. Taniguchi, M. Yagi, S. Oikawa, Hatching inhibition test using the Japanese Whiting Sillago japonica as an acute toxicity test for marine fish species., Aquaculture Science, 55: 293-300, 2007.06.|
|57.||N. Takashita, I. Ikeda, N. Onikura, M. Nishikawa, S. Nagata, S. Matsui, S. Kimura, Growth of the fourspine sculpin Cottus kazika in the Gonokawa River, Japan, and effects of water temperature on growth, Fisheries Science, 10.1111/j.1444-2906.2005.01028.x, 71, 4, 784-790, 71(4): 784-790, 2005.01.|
|58.||N. Onikura, A. Nakamura, K. Kishi, Acute toxicity of gallium and effects of salinity on gallium toxicity to the brackish and marine organisms., Bull. Environ. Contam. Toxicol., 10.1007/s00128-005-0761-5, 75, 2, 356-360, 75(2): 356-360, 2005.08.|
|59.||K. Kishi, E. Kitagawa, N. Onikura, A. Nakamura, H. Iwahashi, Expression analysis of sex-specific and 17 beta-estradiol-responsive genes in the Japanese medaka, Oryzias latipes, using oligonucleotide microarrays., GENOMICS, 88 (2): 241-251, 2006.01.|
|60.||The toxic effects of 17 pesticides were investigated using acute and reproduction tests of crustaceans (Ceriodaphnia dubia and Daphnia magna), early life stage toxicity test of zebrafish, Danio rerio, and growth inhibition test of green algae (Selenastrum capricornutum). Principal component and cluster analyses were then applied to the toxicity data obtained to classify these pesticides. Seven pesticides exhibited high acute toxicity to crustaceans (LC50s were below 10ppb). EC50s for C. dubia and D. magna reproduction tests were lower than LC50 values of most pesticides used in this study. A few of them exhibited fairly high toxicity to either D. rerio or S. capricornutum (EC50s were below 10ppb). The principal component analysis of these toxicity data revealed that three components mainly contributed to the toxic effects of the pesticides: components highly toxic to crustaceans, fish, and green algae, respectively. Cluster analysis was then carried out based on the data of the principal component analysis. Results indicate that these 17 pesticides were classified into 5 categories. This study demonstrated the importance of using various organisms to understand the toxic effects of chemicals on the ecosystem..|
|61.||Norio ONIKURA, Naohiko TAKESHITA, Seiichi MATSUI, Seiro KIMURA, Age, Growth and Hatching Dates Based on Otolith Increments of Larvae and Juveniles of the Roughskin Sculpin Trachidermus fasciatus (Scorpaeniformes: Cottidae) in Ariake Bay, Kyushu Island, Japan, SUISANZOSHOKU, 52(4): 375-379., 2004.12.|
|62.||M. Hirano, H. Ishibashi, N. Matsumura,Y. Nagao, N. Watanabe, A. Watanabe, N. Onikura, K. Kishi, K. Arizono, Acute Toxicity of Two Crustaceans, Americamysis bahia and Daphnia magna, to Endocrine Disrupters., Journal of Health Science, 50(1): 97-100., 2004.02.|
|63.||Tatarazako N, Takao Y, Kishi K, Onikura N, Arizono K, Iguchi T, Styrene dimers and trimers affect reproduction of daphnid (Ceriodaphnia dubia)., Chemosphere, 48(6):597-601., 2002.08.|
|64.||N. Onikura, N. Takeshita, S. Matsui, S. Kimura, Spawning grounds and nests of Trachidermus fasciatus (Cottidae) in the Kashima and Shiota estuaries system faching Ariake Bay, Japan., Ichthyological Research, 10.1007/s102280200027, 49, 2, 198-201, 49(2): 198-201., 2002.05.|
|65.||N. Takehsita, N. Norio, S. Matsui, and S. Kimura, A note on the reproductive ecology of the catadromous fourspine sculpin Cottus kazika (Scorpaeniformes: Cottidae)., Ichthyological Research, 10.1007/BF02678518, 46, 3, 309-313, 46(3): 309-313., 1999.08.|
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