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| Registros recuperados: 37 | |
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| Maes, J.; Taillieu, A.; Van Damme, P.A.; Ollevier, F.P.. |
| Fykes were used to monitor the fish and crustacean fauna of the mudflats of the Zeeschelde between April 1995 and December 1996. Overall 38 species were recorded; the number of species was greater in the brackish water part than in the fresh water part probably due to reduced oxygen concentrations in the upper reaches of the river. In terms of wet weight, just 6 species accounted for more than 96% of the total annual catch. These species are shore crab, eel, flounder, common shrimp, sole and bass. Clear seasonal patterns in the community structure were not identified. It is argued that the selectivity of the fishing gear is mainly responsible for the dominance of a few species and the lack of a temporal structure. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=1409 |
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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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| 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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| Merchie, G.; Lavens, P.; Verreth, J.; Ollevier, F.P.; Nelis, H.; De Leenheer, A.P.; Storch, V.; Sorgeloos, P.. |
| The effect of three dietary ascorbic acid (AA) concentrations, each applied via two feed types, on production characteristics and physiological condition of African catfish (<i>Clarius gariepinus</i>) larvae has been assessed in two 10-day culture trials. Three treatments received only <i>Artemia</i> nauplii enriched with an experimental emulsion containing 0, 10 or 20% ascorbyl palmitate (AP) and yielding 530, 1200 and 1600 µg AA g<sup>-1</sup> DW <i>Artemia</i> , respectively; the other three treatments were fed the same <i>Artemia</i> diets which were partially substituted by an artificial diet containing no vitamin C (ratio 20:80). No differences in survival could be observed: however, from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish larvae; Food organisms; Vitamin C; Clarias gariepinus. |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2963 |
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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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| Thyssen, A.; Grisez, L.; van Houdt, R.; Ollevier, F.P.. |
| The taxonomic position of <i>Photobacterium damselae</i> subsp. <i>piscicida</i>, the causative agent of fish pasteurellosis, is controversial as this organism has also been described as '<i>Pasteurella piscicida</i>'. To clarify the taxonomic position of the pathogen, a total of 113 <i>P. damselae</i> subsp. <i>piscicida</i> strains and 20 <i>P. damselae</i> subsp. <i>damselae</i> strains, isolated from different geographical areas and from the main affected fish species, were analysed using 129 morphological and biochemical tests, including the commercial API 20E and API CH50 test systems. For comparison, the type strains of other <i>Photobacterium</i> species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Numerical taxonomy. |
| Ano: 1998 |
URL: http://www.vliz.be/imisdocs/publications/238535.pdf |
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| Thomas, B.; Ollevier, F.P.. |
| The host specificity and population dynamics of <i>Anguillicola crassus</i> in a number of paratenic hosts were investigated. Various freshwater fish species were sampled monthly (March 1990 to March 1991) from the Kolenhaven (Albertcanal, Genk, Belgium) and examined for L<sub>3</sub>-larvae of <i>Anguillicola crassus</i>. Sixteen species were found to be infected: all the physoclist species examined (<i>Gymnocephalus cernua, Lepomis gibbosus, Ictalurus nebulosus, Stizostedion lucioperca, Gasterosteus aculeatus, Oreochromis niloticus</i> and <i>Perca fluviatilis</i>) and those physostome species of which a sufficient number could be examined to detect the infection (<i>Gobio gobio, Leuciscus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Endoparasites; Freshwater fish; Hosts; Introduced species; Parasites; Population dynamics; Specificity; Swim bladder; Anguillicola crassus; Pisces [Fish]. |
| Ano: 1992 |
URL: http://www.vliz.be/imisdocs/publications/299068.pdf |
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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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| 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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| 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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| Registros recuperados: 37 | |
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