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| Registros recuperados: 37 | |
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| Pector, R.; Tackaert, W.; Abelin, P.; Ollevier, F.P.; Sorgeloos, P.. |
| African catfish (<i>Clarias gariepinus</i>) larvae were fed on five preparations of decapsulated Great Salt Lake <i>Artemia</i> cysts: 1) dried (35°C, 6 h) and UV-irradiated cysts; 2) heated cysts (80°C, 10 min); 3) brine dehydrated and UV irradiated cysts; 4) micro-bound diet 1(with intact decapsulated cysts used in diet preparation 1); and 5) micro-bound diet 2 (with crushed and shifted decapsulated diet used in diet preparation 1). The larvae were fed from the first day after yolk-sac resorption (fourth day after hatching). After a 14-d rearing period, larvae fed on dried or heated decapsulated cysts or micro-bound diet 1. Feeding micro-bound diet 2 resulted in a significantly lower average gain in weight as compared to the other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia; Clarias gariepinus. |
| Ano: 1994 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2660 |
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| De Charleroy, D.; Cannaerts, V.; Augustijn, H.; Grisez, L.; Boon, J.; Ollevier, F.P.. |
| A standardized method was developed for artificially infecting the European eel with <i>Anguillicola crassus</i>, a parasitical swim bladder nematode. For this purpose, an intermediate host, <i>Paracyclops fimbriatus</i>, and a paratenic host, <i>Cyprinus carpio</i>, were used. Parasite prevalence in the artificially infected eels was very high, although there was a large variation in the number of worms per eel. Compared to other methods of artificial infection described in the literature, this method appears to be more efficient ad reliable; there were also more infectious larvae that were recovered and the mortality rate of eels under treatment was lower. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hosts Infestation Invertebrate larvae Methodology Mortality Swim bladder Anguilla anguilla (Linnaeus; 1758) Anguillicola crassus Copepoda [copepods] Cyprinus carpio Nematoda [Nematodes] Paracyclops fimbriatus (Fischer; 1853). |
| Ano: 1990 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3073 |
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| Belpaire, C.; Smolders, R.; Vanden Auweele, I.; Ercken, D.; Breine, J.; Van Thuyne, G.; Ollevier, F.P.. |
| A multimetric fish Index of Biotic Integrity (IBI) was composed to assess the biotic integrity of Flandrian water bodies. As fish communities differ substantially between standing waters, running waters of the bream zone and running waters of the barbel zone, eight candidate metrics for each of these water types or zones were identified, representing three major classes of biological attributes. These are species richness and composition, fish condition and abundance, trophic composition. The metrics were tested and modified where needed. The IBI was applied throughout Flanders on 104 locations in standing waters, 500 locations in waters of the bream zone and 257 locations in waters of the barbel zone. Standing waters scored substantially different from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance Aquatic communities Body conditions Community composition Condition factor Freshwater environments Freshwater fish Inland water environment Species diversity Trophic relationships Trophic structure Water bodies Pisces [Fish] Belgium Belgium; Flanders. |
| Ano: 2000 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4904 |
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| Grisez, L.; Ollevier, F.P.. |
| The different serotyping systems, based on thermostable O antigens, reported for <i>Vibrio anguillarum</i> and <i>V. ordalii</i> were compared by quantitative agglutination, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and subsequent silver staining or Western blotting (immunoblotting) of purified lipopolysaccharide (LPS), using polyclonal rabbit antisera. The results demonstrate that 16 different serotypes within <i>V. anguillarum</i> (designated 01 to 016) can be distinguished. Each of these serotypes is characterized by a distinct polysaccharide banding pattern, as revealed by silver-stained gels of purified LPS. The comparative analysis allowed a complete alignment of the different stereotypes for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pathogens; Serology; Vibrio anguillarum. |
| Ano: 1995 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2970 |
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| Corneille, S.; Agius, C.; Ollevier, F.P.. |
| Analysis of the fatty acids of total lipids of wild fingerlings (1-4 g) of sea bass (<i>Dicentrarchus labrax</i>) caught off the northcoast of France shows that more than 30% of total fatty acids consists of the two essential fatty acids eiopentaenoic (C20:5 n-3) and docosahaenoic (C22:6 n-3) acids. One- and three-day old yolk sac larvae have even higher amounts of these two important fatty acids (about 40%). On the other hand, laboratory-reared 60-day old larvae had much lower concentrations of C20:5 n-3 (4% of total fatty acids) and C22:6 n-3 (5,5% of total fatty acids). In larvae suffering from whirling or spinning disease the percentage of C20:5 n-3 was only 2,8% and only traces of C22:6 n-3 were found. These results emphasize the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dicentrarchus labrax [Bass]. |
| Ano: 1990 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3059 |
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| Denayer, B.; De Ranter, K.; Van Poele, J.; Ollevier, F.P.. |
| Biofouling is a very frequent and serious problem in the cooling systems of electrical power stations. An investigation is being carried out at the Doel nuclear power station to discover ways of combating micro-fouling. Micro-fouling is combated preventively and curatively using a combination of chlorine, biofilm wetting agent and dispersing agent. This treatment removes the slime layer, which can act as a primary attachment point for macro-organisms.In the study of the macro-fouling in the cooling circuits, a monitoring method was developed which uses artificial substrates to provide direct data on the colonization and growth of these organisms. On the basis of the data obtained, the treatment frequency for the prevention or combating of biofouling was... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1992 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2746 |
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| Geets, A.; Liewes, E.W.; Ollevier, F.P.. |
| Six anthelmintic drugs, Ivermectin, Closantel, Safewormer, Masoten, Oxfendazole and L-Levamisol·HCL were screened for their efficacy against <i>Anguillicola crassus</i>, a swimbladder nematode of European eel <i>Anguilla anguilla</i>. All experiments were carried out under saltwater conditions. Of the 6 drugs, L-Levamisole·HCL used in a bath treatment gave the most promising results. Evaluation of the curative dose of L-Levamisole·HCL showed that a long-term treatment (24h). Dosages lower than 20 mg 1<sup>-1</sup> showed a lower efficacy against <i>Anguillicola crassus</i>. However, even with a long-term, high-dosage treatment, some recovery of adult nematodes with sublethal damage and/or migration of viable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anguilla anguilla (Linnaeus; 1758) Anguillicola crassus. |
| Ano: 1992 |
URL: http://www.vliz.be/imisdocs/publications/299063.pdf |
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| Geets, A.; Ollevier, F.P.. |
| The parasitic fauna of the alimentary tract of adult whitespotted rabbitfish, <i>Siganus sutor</i>, sampled in December 1990 at the Kenyan coast, was investigated. Five endoparasites were found: the digenean trematodes <i>Opisthogonoporoides hanumanthai, Gyliauchen papillatus</i> and <i>Hexangium sigani</i>, the acanthocephalan <i>Sclerocollum rubrimaris</i> and the nematode <i>Procammalanus elatensis</i>. No uninfected fish, nor single species infections occurred. Parasite population data showed very high prevalences for all endoparasites, ranging from 68.18% to 100%. <i>G. papillatus</i> occurred with the highest mean intensity, 201.68 ± 12.54 parasites per infected fish. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siganus sutor [shoemaker spinefoot] ISW; Kenyan Coast. |
| Ano: 1996 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2966 |
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| Pedersen, K.; Grisez, L.; van Houdt, R.; Tiainen, T.; Ollevier, F.P.; Larsen, J.L.. |
| The present paper summarizes the serotyping scheme of the fish pathogenic bacterium <i>Vibrio anguillarum</i> and defines seven additional O-serogroups. Strains, collected in our laboratories that were nontypable with antisera against the previously defined 16 O-serotypes, were used for generating new antisera and were characterized further by means of LPS profiles, Western blots, and serological reactions. On the basis of the results, it is suggested that the seven new O-serogroups are to be included in the existing serotyping system as serotypes O17-O<sub>2</sub>3. However, the existence of further <i>V. anguillarum</i> strains that were not typable with any of the 23 O-antisera suggested the existence of additional... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacterial diseases; Fish diseases; Pathogenic bacteria; Pathogens; Serological studies; Serotypes; Strains; Vibrio anguillarum. |
| Ano: 1999 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=9525 |
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| Van Damme, P.A.; Hostens, K.; Ollevier, F.P.. |
| In the 19th century approximately 40 fish species (excluding freshwater species) were recorded in the lower Zeeschelde between the Dutch/Belgian border and Antwerpen. In comparison with the 19th century and the first half of the 20th century the total number of fish species in the Beneden-Zeeschelde has decreased considerably. The present checklist (1991-1993) of fishes of the lower Zeeschelde (excluding freshwater species) contains only 26 species. The fish community is composed of marine species (13), catadromous species (3), estaurine residents (9) and one anadromous fish species. Besides, 6 freshwater fis species have presently been recorded. The distribution of diadromous fishes, estaurine residents and freshwater fishes is probably greately affected... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1994 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=1575 |
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| Daemen, E.; Volckaert, F.A.M.J.; Cross, T.F.; Ollevier, F.P.. |
| Clones (<i>Anguilla anguilla</i>) were obtained from a size-selected library (300-800 bp HaeIII, PvuII, EcoRV-digested inserts), by hybridization with gamma super(32)P-labelled (dG-dT) sub(15). The sequences of the loci Aan01, Aan02, Aan03 and Aan04 have been submitted to GenBank/EMBL (acc. nos U67163, U67164, U67165 and U67166). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomarkers Genetics Anguilla anguilla (Linnaeus; 1758). |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2930 |
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| Thomas, K.M.; Ollevier, F.P.. |
| Hatching of eggs of <i>Anguillicola crassus</i> was studied at temperatures between 5 and 30°C. Hatching occurred between 10 and 30°C and the incubation time was inversely related to temperature. Survival, spontaneous and excitatory rate of activity of 2nd-stage larvae of <i>A. crassus</i> were also affected by temperature. The percentage of larvae eaten by <i>Paracyclops fimbriatus</i> was not always influenced by the activity of the larvae. Penetration efficiency into the haemocoel of the intermediate host was highest for freshly hatched larvae and declined gradually with age. Completely non-active larvae were still able to penetrate, although penetration efficiency was lower. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anguillicola crassus. |
| Ano: 1993 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2788 |
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| Merchie, G.; Lavens, P.; Dhert, Ph.; Pector, R.; Mai Soni, A.F.; Nelis, H.; Ollevier, F.P.; De Leenheer, A.P.; Sorgeloos, P.. |
| Live food enrichment techniques, using formulated diets and emulsions for improving the nutritional quality of <i>Brachionus</i> and <i>Artemia</i> , were studied as a tool for transferring ascorbic acid (AA) to fish larvae. <i>Artemia</i> nauplii enriched for 24h with an experimental emulsion containing 20% HUFA and 0%, 10% and 20% ascorbyl palmitate (AP) were administered to catfish larvae in a 20-day feeding trial. Survival was not affected by the dietary AA, but from day 7 onwards a significantly positive effect of supplemental AA on growth was demonstrated. At the end of the experiment the 20% AP group weighed 30% more than the control (0% AP), i.e. 9.5 and 6.3mg DW, respectively. Evaluation of the physiological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clarias gariepinus Dicentrarchus labrax (Linnaeus; 1758) [Bass]. |
| Ano: 1995 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2581 |
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| Van Damme, P.A.; Ollevier, F.P.. |
| Two species of <i>Lernaeocera</i> are present in the southeastern North Sea. <i>Lernaeocera lusci</i> infects bib <i>Trisopterus luscus</i>, dragonet <i>Callionymus lyra</i> and sand goby <i>Pomatoschistus minutus. L. minuta</i> is a junior synonym of <i>L. lusci.</i>. The second valid species, <i>L. branchialis</i>, infects whiting <i>Merlangius merlangus</i>. The two species can be morphologically separated by the antennary processes, which are present in <i>L. lusci</i> and absent in <i>L. branchialis</i>. Discriminant functions allow complete separation between <i>L. lusci</i> and <i>L. branchialis</i>. There... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lernaeocera Blainville; 1822. |
| Ano: 1995 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3130 |
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| Registros recuperados: 37 | |
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