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Registros recuperados: 8
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Detection of a mollicute-like organism in kuruma shrimp, Penaeus japonicus ArchiMer
Choi, Dong-lim; Park, Myoung-ae; Sohn, Sang-gyu; Heo, Moon-soo; Renault, Tristan.
A filamentous form of mollicute-like bacterium was detected during a routine health survey of wild adult kuruma shrimp Penaeus japonicus. The kuruma shrimp were native to Japan and were imported to Korea. The histology showed no pathological changes. Transmission electron microscopy revealed extensive infections of hepatopancreatic epithelial cells by a pleomorphic, filamentous intracellular bacterium. The filamentous bacterium was of about 60 nm in diameter and 300 nm to more than 1µm in length. The morphology of bacteria were filamentous and branched with terminal blebs, or knobs, on the branches. They lacked the cell wall, and were bounded by the plasma membrane. They contained typical prokaryotic ribosomes and fibrillar DNA-like strands. No additional...
Tipo: Text Palavras-chave: Transmission electron microscopy; Hepatopancreas; Mollicute; Intracellular bacteria; Penaeus japonicus.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/1996/publication-2901.pdf
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Estudio morfologico e histologico del hepatopancreas del langostino Pleoticus muelleri (Bate)(Crustacea, Penaeoidea) OceanDocs
Cuartas, E.I.; Díaz, A.C.; Petriella, A.M..
The decapod crustacean hepatopancreas is a conspicuous and bilobated gland composed of simple, blind-ended tubules, which opens into the pyloric stomach. The gland is completely surrounded by connective tissue which limits also the tubules. In this work midgut gland cells of Argentine shrimp Pleoticus muelleri were investigated under light microscopy. Each tubule has three defined zones: distal, middle and proximal. Four cell types, E-cells (embryonic), F (fibrillar), R (resorptive) and B (secretory) form the epithelium. The histology of the hepatopancreas of P. muelleri is described, emphasizing the particularities in this species whose general features can be compared to that of other decapod crustaceans.
Tipo: Journal Contribution Palavras-chave: Hepatopancreas; Histology; Organism morphology; Hepatopancreas; Http://aims.fao.org/aos/agrovoc/c_34294.
Ano: 2002 URL: http://hdl.handle.net/1834/1702
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Fine structural analysis of the epithelial cells in the hepatopancreas of Palaemonetes argentinus (Crustacea, Decapoda, Caridea) in intermoult Biocell
Sousa,Liliana G.; Cuartas,Elena I.; Petriella,Ana María.
The aim of this study is to describe the ultrastructure of the hepatopancreas of P. argentinus in intermoult. P. argentinus hepatopancreas was studied using standard TEM techniques. Each tubule consists of four cellular types: E (embryonic), F (fibrillar), R (resorptive) and B (blister like). E-cells have embryonic features and some of them were found in mitosis. F, R and B cells possess an apical brush border. F-cells have a central or basal nucleus, a conspicuous RER, and dilated Golgi cisternae. R cells show a polar organization of organelles in three areas: apical, with numerous mitochondria and sER tubules, a central area with the nucleus and RER, and a basal area containing a sER-like tubule system and mitochondria. B-cells were observed at different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacea; Caridea; Hepatopancreas; Ultrastructure.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452005000100004
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Functional cytology of the hepatopancreas of Palaemonetes argentinus (Crustacea, Decapoda, Caridea) under osmotic stress BABT
Díaz,Ana Cristina; Sousa,Liliana Graciela; Petriella,Ana María.
The present work describes the effect of different salinities on the functional morphology of the P. argentinus hepatopancreas and analyses the tissue recovery after re-acclimation to freshwater. Adult prawns of both sexes at sexual rest were collected from a tributary of the Mar Chiquita coastal lagoon. The prawns were acclimated in aquaria to four salinity conditions: 0 (control), 8, 16 and 24‰. To evaluate the possible tissular recovery, after 60 days individuals from all the treatments were gradually acclimated to freshwater and maintained for other 30 days. Hepatopancreas samples were processed at the beginning of the trial and every 30 days using standard histological techniques for OM and TEM. The individuals from all the treatments, except the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Salinity; Histology; Hepatopancreas; P. argentinus.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300013
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Growth and reproduction of the mangrove crab Goniopsis cruentata (Latreille, 1803) (Crustacea: Decapoda: Grapsidae) in southeastern Brazil Anais da ABC (AABC)
Reis,Carla R.G.; Taddei,Fabiano G.; Cobo,Valter J..
Goniopsis cruentata is a common semi-terrestrial crab in Brazilian mangroves and an important fishery resource for traditional communities in the northeastern Brazilian coast. Aiming to contribute to the knowledge about the species, this study evaluated the carapace width and weight growth curves, the relative growth of weight versus carapace width, and the temporal variation of gonadosomatic and hepatosomatic indices for the species. A total of 524 crabs were collected in a mangrove area of Ubatuba municipality, state of São Paulo. The growth-curves parameters and longevity (tmax) were estimated for males (CW∞=50.6 mm, WE=56.4 g, k=2.24, t0=0.003631502 year-1, tmax=1.3 years) and females (CW∞=50.7 mm, WE∞=58.8 g, k=2.50, t0=0.003247209 year-1, tmax=1.2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gonad development; Growth curves; Hepatopancreas; Relative growth.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200699
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Histoarchitectural Features of the Hepatopancreas of the Amazon River Prawn Macrobrachium amazonicum International Journal of Morphology
Franceschini-Vicentini,Irene Bastos; Ribeiro,Karina; Papa,Luciene Patrici; Marques Junior,Julio; Vicentini,Carlos Alberto; Valenti,Patricia Maria Contente Moraes.
In decapod crustaceans, the digestive gland is concerned with the digestion, absorption of nutrients, the storage of reserves and excretion. The metabolism and the histological and histochemical changes of the hepatopancreas are observed in response to physiological demands as moult, reproduction, digestive process. Thus the hepatopancreas structure should be recognized to provide important morphological information to future studies involving the nutrition requirements of freshwater prawn culture. In this study, second-generation Macrobrachium amazonicum produced from wild broodstock collected in the state of Para in Brazil were used. Thirty adult male and female M. amazonicum were selected and randomly transferred to five experimental units for...
Tipo: Journal article Palavras-chave: Hepatopancreas; Morphology; Decapoda; Macrobrachium amazonicum.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000100022
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Partial characterization of hepatopancreatic and extracellular digestive proteinases of wild and cultivated Octopus maya ArchiMer
Martinez, Romain; Santos, R.; Alvarez, A.; Cuzon, Gerard; Arena, L.; Mascaro, M.; Pascual, C.; Rosas, C..
Proteinases from hepatopancreas (HP) and gastric juice (GJ) from wild and cultured red octopus (Octopus maya) were characterized. Hepatopancreas assays revealed optimal activity at pH 4, 9-10 and 10 for wild and pH 3, 8, and 9, for cultured octopuses, for total proteinases, trypsin and chymotrypsin, respectively. In the gastric juice, maximum activity was recorded at pH 6, 8, and 7 for total proteinases, trypsin, and chymotrypsin, respectively for both wild and cultured octopus. A reduction on enzyme activity of 70 and 20% was observed in HP and GJ extracts, respectively when protease inhibitor Pepstatin A was used. That result suggests that the main proteases in the HP were aspartic acid proteinases type (possibly Cathepsin D) and some of them were...
Tipo: Text Palavras-chave: Cephalopods; Digestive proteinases; Hepatopancreas; Gastric juice; Octopus maya.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00036/14683/17998.pdf
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Zinc accumulation in phosphate granules of Ucides cordatus hepatopancreas BJMBR
Corrêa Junior,J.D.; Allodi,S.; Amado-Filho,G.M.; Farina,M..
Amorphous phosphate granules are present in vertebrate and invertebrate organisms. The functions attributed to these structures depend on their mineral contents and organic matrix composition. In the present study we have determined zinc concentrations in the hepatopancreas of the crab Ucides cordatus from regions contaminated with zinc, and the elemental composition of hepatopancreal phosphate granules. Organisms were collected from the contaminated areas of Sepetiba Bay (SB) and Guanabara Bay (GB), and from a non-contaminated area, Ribeira Bay (RB). The first two sites are located near the metropolitan region of Rio de Janeiro city, Brazil. Atomic absorption spectroscopy (AAS) showed a significant difference (P<0.05) for zinc concentration in the...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Phosphate granules; Hepatopancreas; Zinc; Energy dispersive X-ray analysis; Atomic absorption spectroscopy; Electron spectroscopic imaging.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000200009
Registros recuperados: 8
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