Research Institute of Environment
Research Institute of Environment
Ariyama H.,Research Institute of Environment |
Angsupanich S.,Prince of Songkla University |
Rodcharoen E.,Prince of Songkla University
Zootaxa | Year: 2010
Two new species of the genus Kamaka Dershavin, 1923 (Crustacea: Amphipoda: Kamakidae) are described from Songkhla Lagoon in southern Thailand. Kamaka appendiculata sp. nov. has unique lamellate appendix on peduncle of antenna 2 in adult male. Kamaka songkhlaensis sp. nov. has swelled peduncular article 4 of antenna 2 and wide propodus of gnathopod 2 in adult male. Morphological characters of K. songkhlaensis closely resemble those of K. poppi Bamber, 2003 from Hong Kong and K. taditadi Thomas & Barnard, 1991 from Papua New Guinea, Indonesia and Malaysia; however, K. songkhlaensis can be distinguished from K. poppi by the peduncular article 4 of male antenna 2 without distal spine and the convex distal margin of propodus of male gnathopod 2, and from K. taditadi in the right-angled posteroventral corner of male coxa 1 and the propodus of male gnathopod 2 without blunt triangular process on anterior margin. Copyright © 2010 Magnolia Press.
Urabe M.,University of Shiga Prefecture |
Ishibashi R.,Research Institute of Environment |
Uehara K.,Research Institute of Environment
Parasitology International | Year: 2015
In 2009, a novel larval trematode of the family Gorgoderidae was found in the gonads of Nodularia douglasiae (Unionidae) from the lower reaches of the Yodo River, Osaka Prefecture, Japan. This is the first collection of trematodes in a unionid mussel in Japan. We investigated the morphology and life cycle of the trematode, and conducted a molecular phylogenetic analysis with other gorgoderid species, both those collected in the Yodo River water system and those reported in the literature.Immature adult worms were obtained from the ureters of the common carp Cyprinus carpio, the first known instance of a gorgoderid from these fish in Japan. Morphological characteristics and molecular data show that it belongs to the subfamily Gorgoderinae (genus Phyllodistomum sensu lato). Regarding the morphology, first intermediate host, and the infection site of adult worms, it resembles Phyllodistomum elongatum Nybelin, 1926 from Europe, but no comparable molecular data exist for Ph. elongatum. Three cytochrome c oxidase subunit I haplotypes were detected in the specimens analyzed, suggesting that the present species is indigenous to the Yodo River water system. The 28S ribosomal DNA data showed that this species is a member of the clade consisting of Ph. cf. symmetorchis, Ph. folium, Pseudophyllodistomum and Xystretrum. However, its phylogenetic position within the clade differs between the maximum likelihood and maximum parsimony trees, and the sister species of the present species remain unclear. © 2014 Elsevier Ireland Ltd.
Hirooka Y.,Japan Forestry and Forest Products Research Institute |
Kawaradani M.,Research Institute of Environment |
Sato T.,Japan National Institute of Agrobiological Science
Mycological Progress | Year: 2014
Gibellulopsis chrysanthemi sp. nov. is described and illustrated from specimens on rotten leaves of garland chrysanthemum (Chrysanthemum coronarium L. var. spatiosum L.H. Bailey), collected in three different sites of Osaka Prefecture, Japan. This species is characterized by having short and long verticillium-like conidiophores, 1-septate, long-cylindrical conidia with tapering ends and slightly brownish chlamydospores. Compared morphologically with other species in the Plectosphaerellaceae (sister to the Glomerellales), G. chrysanthemi is similar to Gibellulopsis nigrescens, from which it differs in the formation of long conidiophores and 1-septate, long-cylindrical conidia with tapering ends. In addition, the molecular analyses of G. chrysanthemi and other members of the Plectosphaerellaceae based on a phylogenetic tree with three-loci (ITS, D1/D2, tef1-α) sequences reveal that G. chrysanthemi is located as a sister group of G. nigrescens. © 2013 German Mycological Society and Springer-Verlag Berlin Heidelberg.
Ariyama H.,Research Institute of Environment |
Secor D.H.,University of Maryland College Park
Fisheries Science | Year: 2010
Important crustacean fisheries occur in semi-enclosed seas. These fisheries can be strongly affected by intense exploitation and episodic anthropogenic and climatic events, but the effects of such events remain largely uninvestigated. To assess the influence of such factors, we examined dredge catch data on the gazami crab Portunus trituberculatus in Osaka Bay, Japan from 1984 to 2008 and investigated various associated environmental factors. There were five peak monthly catches during the study period, which typically occurred in August or November. Relative abundance (measured as catch per unit effort) in August was positively associated with previous recruitments to the fishery, typhoon frequency, and dissolved oxygen saturation during the juvenile period. In comparison, relative abundance in November was strongly correlated with the number of typhoons and was also positively associated with dissolved oxygen levels in the bottom water. The results of our multi-decadal study suggest that hypoxia is a principal agent of mortality for juvenile crabs and that normoxia in the nursery habitats is a necessary condition for the successful recruitment of individuals into the adult population. The positive influence of typhoons on recruitment is probably due increased mixing in stratified coastal waters, which disrupts the persistent hypoxia in bottom waters, but other unknown processes may also contribute to favorable recruitments. © The Japanese Society of Fisheries Science 2010.
Kishida M.,Research Institute of Environment |
Kishida M.,Industry and Labor
Journal of Environmental Sciences (China) | Year: 2013
This is the first to elucidate the distribution and sources of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDFs), and dioxin-like polychlorinated biphenyls in the waters from Kanzaki River, which is one of the most heavily polluted rivers in Japan. The World Health Organization (WHO)-toxic equivalent quantities (TEQs) in waters from the mainstream exceeded the Japanese environmental standard (1.0 pg-TEQ/L). The PCDD/PCDFs were dominated by highly chlorinated DFs, which predominantly contributed to the WHO-TEQs, suggesting that the main causes would be the incineration-related wastes. To find the sources, the dioxin congener concentrations in water and sediment samples from its tributary small waterways were determined. Abnormally high WHO-TEQs were detected in a water (50 pg-TEQ/L) and a sediment sample (41,000 ng-TEQ/kg dry weight) near the industrial solid waste incinerators (ISWIs). The PCDD/PCDF characteristics agreed well with those of the incinerator-related wastes as seen in the mainstream. These facts indicate that the dioxin pollution in the mainstream could be largely related to the industrial wastes from the ISWIs. Here, a TEQ apportionment method was used to understand the contribution of the pyrogenic sources to the WHO-TEQs. The average contribution ratios of the pyrogenic sources to WHO-TEQs were more than 80% for river waters from the mainstream, indicating that the elevated WHO-TEQs in the mainstream had been largely caused by the ISWIs. © 2013 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
Kusakabe T.,Research Institute of Environment
Nippon Suisan Gakkaishi (Japanese Edition) | Year: 2011
Age and growth of robust tonguefish Cynoglossus robustus in Osaka Bay were studied. The technique of dyeing sectioned sagittal otoliths with methyl violet B showed distinct violet rings. These rings were confirmed to be annual and formed mainly from June to July, corresponding with the spawning season. Reading 784 specimens from 2000 to 2002, growth of the fish was expressed by von Bertalanffy's equation as TLt=352.9(1- e-0.703(t+0.528)) for males and TLt=406.6(1-e-0.638(t+0.422)) for females where TL is total length in mm and t is age in years. The females were larger than the males at each age. The total length of 1-year-old males and females reached 66% and 60% of their extremity length, suggesting the relatively fast growth of this species. The seasonal changes in the size composition of the fish caught by trawl net showed relatively large catches of low value small fish from April to September. It was suggested that postponing the start of fishing of this fish by 4-6 months could lead to a higher fishing income.
Shiratake K.,Nagoya University |
Suzuki M.,Nagoya University |
Suzuki M.,Research Institute of Environment
Breeding Science | Year: 2016
Recent advance of bioinformatics and analytical apparatuses such as next generation DNA sequencer (NGS) and mass spectrometer (MS) has brought a big wave of comprehensive study to biology. Comprehensive study targeting all genes, transcripts (RNAs), proteins, metabolites, hormones, ions or phenotypes is called genomics, transcriptomics, proteomics, metabolomics, hormonomics, ionomics or phenomics, respectively. These omics are powerful approaches to identify key genes for important traits, to clarify events of physiological mechanisms and to reveal unknown metabolic pathways in crops. Recently, the use of omics approach has increased dramatically in fruit tree research. Although the most reported omics studies on fruit trees are transcriptomics, proteomics and metabolomics, and a few is reported on hormonomics and ionomics. In this article, we reviewed recent omics studies of major fruit trees, i.e. citrus, grapevine and rosaceae fruit trees. The effectiveness and prospects of omics in fruit tree research will as well be highlighted. © 2016, Japanese Society of Breeding. All rights reserved.
Ariyama H.,Research Institute of Environment
Zootaxa | Year: 2012
Two new species of the amphipod genus Leipsuropus Stebbing, 1899 are described. Leipsuropus astericolus sp. nov. was collected from the surface of a starfish in Japanese waters and L. hongi sp. nov. from the bottom in Korean waters. Both species have distinct projections on dorsal and lateral surfaces of head, pereonites 1-7 and pleonites 1, 2, and the projections were acute in L. astericolus and blunt in L. hongi. These new species are quite different from L. parasiticus (Haswell, 1879) in Australian waters which has only dorsal rugae on pereonites 1-5. They are also distinguishable from L. sinensis Ren, 2012 in Chinese waters in their sinuate palms of the male gnathopod 2. A key to species of the genus is provided. Copyright © 2012 Magnolia Press.
Shibao M.,Research Institute of Environment |
Tanaka H.,Research Institute of Environment
Japanese Journal of Applied Entomology and Zoology | Year: 2014
The attraction of the melon thrips, Thrips palmi Karny, to two types of traps combined with a colored sticky board and an LED array was investigated in 2010 in an eggplant greenhouse. The colors of the sticky boards were blue, yellow and white, and the peak wavelengths of the LED arrays were 470 nm (blue) and 375 nm (ultraviolet). The "direct type" of traps was designed to directly illuminate the plants with an LED array and set along the upper edge of the board whose sticky surface was directed to the plants. In the" reflective type" of traps, the LED array was set close to the plants and directed toward the sticky boards. As a result, the number of adult thrips caught was significantly larger in the reflective type of trap with combination of the blue sticky board and the blue LED.
Morishita Jintan Co. and Research Institute Of Environment | Date: 2016-12-14
The present invention provides an orally administered agent for ruminants which reaches lower digestive tract without decomposition in the rumen by avoiding the destruction thereof due to rumination, and is disintegrated and dissolved in vivo. The present invention provides an orally administered agent for ruminants, of which the specific gravity is 1.17 to 2.00, the maximum particle size and minimum particle size are either within the range of 4 to 10 mm, and the breaking strength of a portion having the minimum particle size under body temperature environment of the ruminants is within the range of 0.5 to 5.0 N. The present invention further provides ruminant feed containing the orally administered agent and a method of orally administering a drug to ruminants.