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| 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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| 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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| 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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| 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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| 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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