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| Koch,E.; Winik,B.C.; Castro-Vazquez,A.. |
| Development of Pomacea canaliculata from the gastrula stage until the first day after hatching is described. Trochophore embryos are developed after gastrulation, showing the prototroch as a crown of ciliated orange-brownish cells. However, no true veliger embryos are formed, since the prototroch does not fully develop into a velum. Afterward, the connection between the fore- and midgut is permeated and the midgut becomes full of the pink-reddish albumen, which is stored into a central archenteron's lake, from where it is accumulated into the large cells forming the midgut wall ("giant cells"). Electron microscopy of giant cells in late embryos showed that albumen is engulfed by large endocytic vesicles formed between the irregular microvilli at the top of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alimentary canal; Midgut gland; Symbiosis; Albumen. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000100006 |
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| Omondi, J.G.. |
| In order to provide information on the digestive capacity of marine crustacea of mariculture potential in Kenya with a view to aiding the development of suitable feeds to support the industry, a biochemical survey was made of enzymes of extracellular digestion in the Indian White shrimp, Penaeus indicus. Results showed midgut gland endo-proteases in wild adult shrimp from the Kenya coast to have optima between pH 7.2 and 8.5 (Trypsin pH 7.5-8.0, Chymotrypsin pH 7.2-7.8, Elastase pH 6.8-8.5) with maximum specific activities of 101-408, 37-516, 70-90 Units mg protein-1 min-1 for trypsin, chymotrypsin and elastase respectively. There was no pepsin. The North Sea Norway lobster, Nephrops norvegicus, was investigated to a lesser extent and found to have much... |
| Tipo: Journal Contribution |
Palavras-chave: Shrimp; Crustacea; Midgut gland; Lobster; Digestive endo-proteases; Enzyme inhibitors; Hepatopancreas NEPHROPS NORVEGICUS PENAEUS INDICUS Marine crustaceans Mariculture Biochemical analysis Shrimp culture. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1141 |
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