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| Registros recuperados: 13 | |
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| Deroux, G.; Campillo, Albert; Bradbury, Ph. C.. |
| A disease whose severity seems directly bound to conditions of cultivation can cause a heavy mortality in the common prawn Palaemon serratus (Pennant) at molting. The causative agent, A. rodor, is a ciliate, a common external parasite whose life cycle is adapted to the molting cycle of the shrimp. The principal factors favorable to the development of the parasite were studied: age of the host, water temp, numbers of shrimps as a function of the quantity of water and its renewal. The sp A. rodor, although related to the Conidophryidae, Kirby, 1941 (1936) has significant differences (1) in its ethology (it feeds on the exoskeleton without penetrating to its hosts' tissues), (2) in its vegetative multiplication (tomitogenesis combines the cortical... |
| Tipo: Text |
Palavras-chave: Askoella heliostoma; Askoella janssoni; Conidiphrys; Terebrospira lenticularis; Palaemon varians; Palaemon serratus; Ascophrys rodor; Parasitic diseases; Parasites; Rearing. |
| Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/1975/publication-2026.pdf |
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| The whole of experiments carried on from thermal constraints on the larval development of Palaemon serratus allows the following observations: -individual rearings obtain the best survival rates in the witness groups and neutralize by a dense food and the absence of intraspecific cannibalism, factors which can interfere with the results ascribed only to the experiments; - slight thermal increases (10 and 12 degree C) do not involve secondary effects on the post larvae when the development is realized at 20 degree C; - if the TL 50 is reaching 34 degree C, letal effects are observed, as soon as the final temperature; - whatever is the temperature increase, the relation = mortality/temperature reached is similar and this factor mortalities observed, that... |
| Tipo: Text |
Palavras-chave: Palaemon serratus; Mortality; Lethal limits; Larval development; Temperature tolerance; Rearing. |
| Ano: 1980 |
URL: http://archimer.ifremer.fr/doc/1980/publication-1931.pdf |
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| Lassus, Patrick; Maggi, Pierre; Le Baut, Claire; Bardouil, Michèle; Bocquene, Gilles; Le Dean, Loïc; Truquet, Philippe. |
| In order to estimate the effects of chlorine used in cooling systems of electric power plants on zooplankton, some experiments have been realized with the four first larval stages of the prawn (P. serratus Pennant). Chlorine injection was performed by constant adding at 16 and 20 degree C with times exposures of 5, 15 and 25 minutes. If there is no detectable variations in sensitivity of different stages, toxic effects of oxydants issued from chlorination can be observed (for both the two acclimatation temperatures) at 15 minutes exposure with a LD 50 : 32 mg/l of chlorine. |
| Tipo: Text |
Palavras-chave: Palaemon serratus; Pollution effects; Larval development; Chlorine; Toxicity. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/publication-1886.pdf |
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| Galgani, Francois; Benyamin, Y; Vanworhmoudt, A; Cecaldi, J. |
| Proteolytic enzymes of hepatopancreas of six species of peneids (Penaeus kerathurus, P. japonicus, P. monodon, P. stylirostris, P. merguiensis and P. vannamei ) have been studied. Some of their physiological variations have been characterised. Increase in acclimation temperature of crustaceans enhances increase of specific activities of proteases. Variations of salinity does not modify specific activities, nor quantities of trypsin, nor electrophoretic patterns of these different proteases. |
| Tipo: Text |
Palavras-chave: Penaeus kerathurus; Penaeidae; Malacostraca; Diets; Growth; Larval development; Life cycle; Acclimation; Environmental effects; Digestive glands; Enzymatic activity; Salinity effects; Temperature effects; Enzymes; Endocrinology; Digestion; Développement larvaire; Croissance; Cycle d'intermue; Carboxypeptidase A and B; Leucine aminopeptidase; Chymotrypsin; Trypsine; Enzymes digestives; Homarus ganmarus; Palaemon serratus; P. vannamei; P. merguiensis; P. stylirostris; P. monodon; P. japonicus; Penaeus keratkurus. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/acte-1195.pdf |
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| Registros recuperados: 13 | |
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