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Hiroshi Yokoyama - One of the best experts on this subject based on the ideXlab platform.
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henneguya pseudorhinogobii n sp myxozoa myxosporea parasitizing the Gills of the freshwater goby rhinogobius sp or from the nagara river and redescription of henneguya rhinogobii
Fisheries Science, 2009Co-Authors: Tetsushi Kageyama, Tetsuya Yanagida, Kenichi Ohara, Hiroshi YokoyamaAbstract:Two types of infection with myxosporean parasites, which were different in cyst size, were found from the Gill of Rhinogobius sp. OR collected from the Nagara River, Gifu Prefecture, Japan. A myxosporean forming large-type cysts in the Gill filament was morphologically identified as Henneguya rhinogobii. Another myxosporean forming small-type cysts was found to be parasitic in the Gill Lamella. Average spore sizes of the latter myxosporean were 15.8 (range 14.2–17.8) μm in length, 5.3 (4.7–5.8) μm in width, 6.5 (5.9–7.6) μm in polar capsule length and 34.9 (25.3–42.9) μm in caudal appendage length, which were almost identical to those of H. rhinogobii. However, the two were distinguishable by the location in the Gill (intrafilamental or intraLamellar) and by the difference in the sequence of SSU rDNA (about 96% similarity). We propose the myxosporean forming intraLamellar small-type cysts as Henneguya pseudorhinogobii n. sp. and redescribe H. rhinogobii by morphological and molecular studies.
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Diet-tissue isotopic fractionation of the Pacific oyster Crassostrea gigas
Marine Ecology Progress Series, 2008Co-Authors: Hiroshi Yokoyama, Yuka Ishihi, S YamamotoAbstract:Juveniles of the Pacific oyster Crassostrea gigas were reared on a monospecific microalgal diet in order to quantify their 13C and 15N diet–tissue fractionations. The weights of these juveniles increased by up to 18-fold within 33 d. The juveniles reached isotopic equilibria with the diet, enabling calculations of fractionation values. The 13C fractionation for tissues containing lipids ranked as 0.6‰ (Gill Lamella) >0.3‰ (adductor muscle) >–0.2‰ (mantle lobe) >–0.9‰ (whole soft body) >–2.2‰ (midgut gland), while the 15N fractionation ranked as 8.7‰ (adductor muscle) >6.5‰ (mantle lobe) >5.4‰ (whole soft body) >5.2‰ (Gill Lamella) >2.3‰ (midgut gland). Removal of lipids shifted the diet-equilibrated δ13C and δ15N values in all tissues except the adductor muscle, with resultant increases in the 13C and 15N fractionation values. The expected annual mean δ13C value for the diet of the oyster in the field is –17.0‰, which is an intermediate value among the δ13C of coastal phytoplankton (–20.2‰), epilithon (–20.0‰), epipelon (–14.8‰), and seaweeds (–14.9‰), suggesting that the oyster feeds on a mixture of these micro- and macroalgae. The expected δ15N diet value is 3.1‰, which is more depleted than values for micro- and macroalgae, suggesting that the 15N fractionation in the field is smaller than that obtained from the feeding experiment.
Lee Jung Sick - One of the best experts on this subject based on the ideXlab platform.
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effect of pcbs on the skin and Gill development in the larval stage of olive flounder paralichthys olivaceus
Korean Journal of Fisheries and Aquatic Sciences, 2003Co-Authors: Kim Jae Won, Kang Ju Chan, Ma Kyung Hwa, Lee Jung SickAbstract:Effect of PCBs on the skin and Gill development of olive flounder, Paralichthys olivaceus were investigated by histological methodology and morphometric data. The olive flounder were exposed to limit concentration of effulent of PCBs (3.0 ) for 60 days. Skin development can be classified into four stages: SSEL (simple squamous epithelial layer), MCA (mucous cell appearance) & CCA (club cell appearance) DLA (dermal layer appearance), and SEL (startification of epidermal layer) stages. Gill development had five stages: GFA (Gill filament appearance), IGFE (identification of early Gill filament epithelial cell) MCA (mucous cell appearance), PCA (pillar cell appearance), and FGL (formation of Gill Lamella) stages. The periods of structural completion of skin and Gill were 22-30 days and 23-30 days after hatching in the exposure group respectively. The process of development of skin and Gill of the exposure group was very similar to that of the control group. Therefore, PCBs (3 ) have no influence on the development of skin and Gill in the larval stage of olive flounder.
K. Sumantadinata - One of the best experts on this subject based on the ideXlab platform.
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Fin Type Variation of Lionhead Strain Goldfish (Carassius auratus) Offspring
Jurnal Akuakultur Indonesia, 2007Co-Authors: M. Syaifudin, Odang Carman, K. SumantadinataAbstract:Lionhead strain goldfish ( Carassius auratus ) inheritance produce many variations in phenotype qualitative traits of their offspring that is not common with the parents. Lionhead is an ornamental freshwater fish, they do not have a dorsal fin, but it is a beauty finfish, is popular to the people and have a high economic value. Of the 846 offspring of lionhead is produced in this experiment, and 57,7% of them have dorsal fin (42,3% normal), 13,1% of them have anal fin which did not similar with their parents, 58,6% caudal fin of them did not have similar to their parents. It might be caused by incompletely segregation in meiosis and many gen responsible to certain phenotype trait. Another abnormalities such as no anal fin, blindness, stumped and no pigmen in their Gill Lamella also occurred. Key words: Inheritance, fin, phenotype, abnormality ABSTRAK Ikan maskoki strain lionhead menghasilkan keturunan dengan fenotip yang sangat bervariasi dan berbeda dengan induknya. Ikan ini merupakan ikan hias air tawar yang tidak memiliki sirip punggung namun tetap memiliki keindahan, sehingga menjadi begitu populer di masyarakat dan memiliki nilai ekonomi yang tinggi. Sebanyak 846 keturunan (anakan) telah dihasilkan dalam percobaan ini, dan sebanyak 57,7% dari populasi tersebut memiliki sirip punggung (berarti 42,3% merupakan keturunan normal), 13,1% memiliki sirip dubur yang tidak mirip dengan induknya. Variasi keturunan ikan maskoki strain lionhead ini disebabkan oleh segregasi yang tidak sempurna dalam proses meiosis dan banyaknya gen yang terlibat dalam pembentukan penotip tertentu. Abnormalitas lainnya juga terjadi pada keturunan ikan maskoki strain lionhead ini, seperti tidak adanya sirip dubur, mata buta, tubuh pendek dan tidak adanya pigmen pada lemela insang Kata kunci: Keturunan, sirip, fenotip, abnormalitas
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KERAGAMAN TIPE SIRIP PADA KETURUNAN IKAN MAS KOKI STRAIN LIONHEAD Fin Type Variation of Lionhead Strain Goldfish (Carassius auratus) Offspring
2004Co-Authors: M. Syaifudin, Odang Carman, K. SumantadinataAbstract:Lionhead strain goldfish (Carassius auratus) inheritance produce many variations in phenotype qualitative traits of their offspring that is not common with the parents. Lionhead is an ornamental freshwater fish, they do not have a dorsal fin, but it is a beauty finfish, is popular to the people and have a high economic value. Of the 846 offspring of lionhead is produced in this experiment, and 57,7% of them have dorsal fin (42,3% normal), 13,1% of them have anal fin which did not similar with their parents, 58,6% caudal fin of them did not have similar to their parents. It might be caused by incompletely segregation in meiosis and many gen responsible to certain phenotype trait. Another abnormalities such as no anal fin, blindness, stumbody and no pigmen in their Gill Lamella also occured.
Kim Jae Won - One of the best experts on this subject based on the ideXlab platform.
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effect of pcbs on the skin and Gill development in the larval stage of olive flounder paralichthys olivaceus
Korean Journal of Fisheries and Aquatic Sciences, 2003Co-Authors: Kim Jae Won, Kang Ju Chan, Ma Kyung Hwa, Lee Jung SickAbstract:Effect of PCBs on the skin and Gill development of olive flounder, Paralichthys olivaceus were investigated by histological methodology and morphometric data. The olive flounder were exposed to limit concentration of effulent of PCBs (3.0 ) for 60 days. Skin development can be classified into four stages: SSEL (simple squamous epithelial layer), MCA (mucous cell appearance) & CCA (club cell appearance) DLA (dermal layer appearance), and SEL (startification of epidermal layer) stages. Gill development had five stages: GFA (Gill filament appearance), IGFE (identification of early Gill filament epithelial cell) MCA (mucous cell appearance), PCA (pillar cell appearance), and FGL (formation of Gill Lamella) stages. The periods of structural completion of skin and Gill were 22-30 days and 23-30 days after hatching in the exposure group respectively. The process of development of skin and Gill of the exposure group was very similar to that of the control group. Therefore, PCBs (3 ) have no influence on the development of skin and Gill in the larval stage of olive flounder.
M. Syaifudin - One of the best experts on this subject based on the ideXlab platform.
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Fin Type Variation of Lionhead Strain Goldfish (Carassius auratus) Offspring
Jurnal Akuakultur Indonesia, 2007Co-Authors: M. Syaifudin, Odang Carman, K. SumantadinataAbstract:Lionhead strain goldfish ( Carassius auratus ) inheritance produce many variations in phenotype qualitative traits of their offspring that is not common with the parents. Lionhead is an ornamental freshwater fish, they do not have a dorsal fin, but it is a beauty finfish, is popular to the people and have a high economic value. Of the 846 offspring of lionhead is produced in this experiment, and 57,7% of them have dorsal fin (42,3% normal), 13,1% of them have anal fin which did not similar with their parents, 58,6% caudal fin of them did not have similar to their parents. It might be caused by incompletely segregation in meiosis and many gen responsible to certain phenotype trait. Another abnormalities such as no anal fin, blindness, stumped and no pigmen in their Gill Lamella also occurred. Key words: Inheritance, fin, phenotype, abnormality ABSTRAK Ikan maskoki strain lionhead menghasilkan keturunan dengan fenotip yang sangat bervariasi dan berbeda dengan induknya. Ikan ini merupakan ikan hias air tawar yang tidak memiliki sirip punggung namun tetap memiliki keindahan, sehingga menjadi begitu populer di masyarakat dan memiliki nilai ekonomi yang tinggi. Sebanyak 846 keturunan (anakan) telah dihasilkan dalam percobaan ini, dan sebanyak 57,7% dari populasi tersebut memiliki sirip punggung (berarti 42,3% merupakan keturunan normal), 13,1% memiliki sirip dubur yang tidak mirip dengan induknya. Variasi keturunan ikan maskoki strain lionhead ini disebabkan oleh segregasi yang tidak sempurna dalam proses meiosis dan banyaknya gen yang terlibat dalam pembentukan penotip tertentu. Abnormalitas lainnya juga terjadi pada keturunan ikan maskoki strain lionhead ini, seperti tidak adanya sirip dubur, mata buta, tubuh pendek dan tidak adanya pigmen pada lemela insang Kata kunci: Keturunan, sirip, fenotip, abnormalitas
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KERAGAMAN TIPE SIRIP PADA KETURUNAN IKAN MAS KOKI STRAIN LIONHEAD Fin Type Variation of Lionhead Strain Goldfish (Carassius auratus) Offspring
2004Co-Authors: M. Syaifudin, Odang Carman, K. SumantadinataAbstract:Lionhead strain goldfish (Carassius auratus) inheritance produce many variations in phenotype qualitative traits of their offspring that is not common with the parents. Lionhead is an ornamental freshwater fish, they do not have a dorsal fin, but it is a beauty finfish, is popular to the people and have a high economic value. Of the 846 offspring of lionhead is produced in this experiment, and 57,7% of them have dorsal fin (42,3% normal), 13,1% of them have anal fin which did not similar with their parents, 58,6% caudal fin of them did not have similar to their parents. It might be caused by incompletely segregation in meiosis and many gen responsible to certain phenotype trait. Another abnormalities such as no anal fin, blindness, stumbody and no pigmen in their Gill Lamella also occured.