Consulta: creatorFacets:"Ollevier, F.P."
Registros recuperados: 37
Data/hora: 01/06/2024 13:47:37

Ecological approach of macro-fouling prevention and control in cooling systems
Provedor de dados: 27
Autores: 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
Ano: 1992
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2746

Mode of infection and spread of &lt;i&gt;Vibrio anguillarum&lt;/i&gt; in turbot &lt;i&gt;Scophthalmus maximus&lt;/i&gt; larvae after oral challenge through life feed
Provedor de dados: 27
Autores: Grisez, L.; Chair, M.; Sorgeloos, P.; Ollevier, F.P.
The infection route of the marine fish pathogen &lt;i&gt;Vibrio anguillarum&lt;/i&gt; was studied after oral challenge of the juvenile turbot &lt;i&gt;Scophthalmus maximus&lt;/i&gt; L. through a life feed. &lt;i&gt;Artemia&lt;/i&gt; nauplii were incubated in a suspension of &lt;i&gt;V. anguillarum&lt;/i&gt; cells, and subsequently fed twice to the fish. All challenged fish died within 4d after the first challenge, while no mortality occurred in the non-challenged controls. The results of an immunohistochemical examination of the sectioned fish samples clearly demonstrated that &lt;i&gt;V. anguillarum&lt;/i&gt; cells were ingested by the &lt;i&gt;Artemia&lt;/i&gt; and that the latter were ingested by the fish. Bacteria were released from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scophthalmus maximus (Linneaus; 1758) Vibrio anguillarum.
Ano: 1996
URL: http://www.vliz.be/imisdocs/publications/299074.pdf

The use of API 20E for the identification of &lt;i&gt;Vibrio anguillarum&lt;/i&gt; and &lt;i&gt;V. ordalii&lt;/i&gt;
Provedor de dados: 27
Autores: Grisez, L.; Ceusters, R.; Ollevier, F.P.
Sixty-eight strains of &lt;i&gt;Vibrio anguillarum&lt;/i&gt;, five of &lt;i&gt;V. ordalii&lt;/i&gt; and the type strains of &lt;i&gt;V. alginolyticus, V. carchariae, V. damsela&lt;/i&gt; and &lt;i&gt;V. parahaemolyticus&lt;/i&gt; were compared using the API 20E gallery. Within the &lt;i&gt;V. anguillarum&lt;/i&gt; strains, distinct groups could be separated mainly on the basis of their reaction on indole production and the fermentation of amygdalin and arabinose. &lt;i&gt;Vibrio ordalii&lt;/i&gt;, the former &lt;i&gt;V. anguillarum&lt;/i&gt; biotope 2, could easily be separated from &lt;i&gt;V. anguillarum&lt;/i&gt; and from the other fish pathogenic &lt;i&gt;Vibrio&lt;/i&gt; spp.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial diseases; Disease control; Disease detection; Fish diseases; Identification; Vibrio carchariae; Vibrio ordalii; Vibrio alginolyticus; Vibrio anguillarum; Vibrio damsela; Vibrio parahaemolyticus.
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2859

Hatching, survival, activity and penetration efficiency of second-stage larvae of &lt;i&gt;Anguillicola crassus&lt;/i&gt; (Nematoda)
Provedor de dados: 27
Autores: Thomas, K.M.; Ollevier, F.P.
Hatching of eggs of &lt;i&gt;Anguillicola crassus&lt;/i&gt; 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 &lt;i&gt;A. crassus&lt;/i&gt; were also affected by temperature. The percentage of larvae eaten by &lt;i&gt;Paracyclops fimbriatus&lt;/i&gt; 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

Comparative serology of the marine fish pathogen &lt;i&gt;Vibrio anguillarum&lt;/i&gt;
Provedor de dados: 27
Autores: Grisez, L.; Ollevier, F.P.
The different serotyping systems, based on thermostable O antigens, reported for &lt;i&gt;Vibrio anguillarum&lt;/i&gt; and &lt;i&gt;V. ordalii&lt;/i&gt; 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 &lt;i&gt;V. anguillarum&lt;/i&gt; (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

Vibrios associated with routine productions of &lt;i&gt;Brachionus plicatilis&lt;/i&gt;
Provedor de dados: 27
Autores: Verdonck, L.; Grisez, L.; Sweetman, E.; Minkoff, G.; Sorgeloos, P.; Ollevier, F.P.; Swings, J.
Surveys for bacteriological analysis were carried out in 1990-1991 in two different marine fish hatcheries located in Greece and northern Spain. Samples were taken from 12 different routine productions of &lt;i&gt;Brachionus plicatilis&lt;/i&gt; before and during enrichment. Isolates were characterized by whole cell fatty acid methyl ester analysis and by BIOLOG metabolic fingerprinting. &lt;i&gt;Vibrio anguillarum&lt;/i&gt; and/or &lt;i&gt;Vibrio alginolyticus&lt;/i&gt; were dominant &lt;i&gt;Vibrio&lt;/i&gt; species in the rotifer samples taken after enrichment and rinsing, before being delivered to the fish larvae. None of the &lt;i&gt;Vibrio anguillarum&lt;/i&gt; strains belonged to the pathogenic serotypes for juvenile and adult fish.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachionus plicatilis Müller; 1786.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2984

Endoparasitic helminths of the whitespotted rabbitfish (&lt;i&gt;Siganus sutor&lt;/i&gt; (Valenciennes, 1835)) of the Kenyan coast: distribution within the host population and microhabitat use
Provedor de dados: 27
Autores: Geets, A.; Ollevier, F.P.
The parasitic fauna of the alimentary tract of adult whitespotted rabbitfish, &lt;i&gt;Siganus sutor&lt;/i&gt;, sampled in December 1990 at the Kenyan coast, was investigated. Five endoparasites were found: the digenean trematodes &lt;i&gt;Opisthogonoporoides hanumanthai, Gyliauchen papillatus&lt;/i&gt; and &lt;i&gt;Hexangium sigani&lt;/i&gt;, the acanthocephalan &lt;i&gt;Sclerocollum rubrimaris&lt;/i&gt; and the nematode &lt;i&gt;Procammalanus elatensis&lt;/i&gt;. No uninfected fish, nor single species infections occurred. Parasite population data showed very high prevalences for all endoparasites, ranging from 68.18% to 100%. &lt;i&gt;G. papillatus&lt;/i&gt; 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

The effect of &lt;i&gt;Artemia&lt;/i&gt; -supplementation of dry foods on growth and survival of &lt;i&gt;Clarias gariepinus&lt;/i&gt; (Burchell 1822) larvae
Provedor de dados: 27
Autores: Van Damme, P.; Pacolet, W.; Sulem Yong, S.; Fremaut, D.; Ollevier, F.P.
Two experiments were performed in order to determine the effect of supplementation of dry foods with live &lt;i&gt;Artemia&lt;/i&gt; nauplii on the growth, survival, rate of cannibalism, and length-weight relationships of &lt;i&gt;Clarias gariepinus&lt;/i&gt; larvae. It was found that &lt;i&gt;Artemia&lt;/i&gt; -supplementation resulted in a significantly higher growth rate. The "condition", expressed as a length-weight relationship, was likewise altered after supplementation. The survival and rate of cannibalism were not influenced by supplementation. &lt;i&gt;Artemia&lt;/i&gt; -supplementation of dry foods was compared with other approaches which are based on the concept of the 'adaptation weight'.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptations; Freshwater fish; Weight; Artemia; Clarias gariepinus.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3193

Protein digestion in juvenile turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;) and effects of dietary administration of &lt;i&gt;Vibrio proteolyticus&lt;/i&gt;
Provedor de dados: 27
Autores: De Schrijver, R.; Ollevier, F.P.
The trial was made to study the protein digestion in juvenile turbot during passage of digesta from stomach to rectum. Moreover, diet supplementation with the potential probiotic bacteria, &lt;i&gt;Vibrio proteolyticus&lt;/i&gt;, was evaluated with regard to protein digestion. For a 3-week period, fish (25-30 g) were fed by oral intubation and received either a liquid mixture consisting of 40% nonpurified control diet and 60% water or this mixture supplemented with 10 &lt;sup&gt;10&lt;/sup&gt; viable &lt;i&gt;V. proteolyticus&lt;/i&gt; ml &lt;sup&gt;-1&lt;/sup&gt;. Daily dry matter was 1.5% body weight. As digesta progressed from the stomach to the foregut, hindgut and rectum, the increase in apparent nitrogen digestibility was accompanied by higher...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Diets; Digestibility; Digestion; Feeding experiments; Fish culture; Food conversion; Nitrogen; Probiotics; Probiotics; Proteins; Scophthalmus maximus; Stomach; Scophthalmus maximus; Vibrio proteolyticus.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=9593

Application of AFLP for taxonomic and epidemiological studies of &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;piscicida&lt;/i&gt;
Provedor de dados: 27
Autores: Thyssen, A.; Van Eygen, S.; Hauben, L.; Goris, J.; Swings, J.; Ollevier, F.P.
A collection of 106 &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;piscicida&lt;/i&gt; strains and 19 &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;damselae&lt;/i&gt; strains, including reference and type strains, were genetically characterized using AFLP. The total genomic DNA of each bacterial strain was digested using restriction endonucleases &lt;i&gt;Hind&lt;/i&gt;III and &lt;i&gt;Taq&lt;/i&gt;I. Using numerical analysis, six clusters were recognized. The largest cluster (n=106) contained the majority of the strains tested and consisted exclusively of &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;piscicida&lt;/i&gt;. The &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;damselae&lt;/i&gt; strains fell...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epidemiology; Taxonomy.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=9527

Live food mediated vitamin C transfer to &lt;i&gt;Dicentrarchus labrax&lt;/i&gt;and &lt;i&gt;Clarias gariepinus&lt;/i&gt;
Provedor de dados: 27
Autores: 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 &lt;i&gt;Brachionus&lt;/i&gt; and &lt;i&gt;Artemia&lt;/i&gt; , were studied as a tool for transferring ascorbic acid (AA) to fish larvae. &lt;i&gt;Artemia&lt;/i&gt; 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

Search for beneficial bacterial strains for turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt; L.) larviculture
Provedor de dados: 27
Autores: Huys, L.; Dhert, P.; Robles, R.; Ollevier, F.P.; Sorgeloos, P.; Swings, J.
The aerobic bacterial flora in the gut of turbot larvae and their influence on larval survival was examined. Two turbot experiments were run with six replicates each time. Large variation, from 0% up to 44%, was observed in the survival percentage of turbot larvae. There was no correlation between the number of bacteria present in the gut of turbot larvae and the larval survival rate. During both experiments, all replicates followed nearly the same rate of bacterial development in the gut of turbot larvae going from circa 10&lt;sup&gt;2&lt;/sup&gt; CFU larva&lt;sup&gt;-1&lt;/sup&gt; just before first feeding at day 3 post hatch to 10&lt;sup&gt;5&lt;/sup&gt; CFU larva&lt;sup&gt;-1&lt;/sup&gt; at day 9 post hatch.In total, 127 bacterial isolates from 12...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic bacteria; Aquaculture; Commensals; Digestive system; Fish culture; Fish larvae; Gastrointestinal tract; Microorganisms; Rearing; Scophthalmus maximus; Survival; Bacteria; Scophthalmus maximus; Vibrio mediterranei.
Ano: 2001
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5720

The effect of dietary salt (NaCl) supplementation on the growth, survival and food conversion rate of African catfish (&lt;i&gt;Clarias gariepinus&lt;/i&gt; B.) larvae
Provedor de dados: 27
Autores: Zamal, H.; Maithya, J.; Pector, R.; Ollevier, F.P.
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2917

The life cycle of &lt;i&gt;Anguillicola crassus&lt;/i&gt;
Provedor de dados: 27
Autores: De Charleroy, D.; Grisez, L.; Thomas, K.; Belpaire, C.; Ollevier, F.P.
For some years now the parasitic swim bladder nematode &lt;i&gt;Anguillicola crassus&lt;/i&gt; of the European eel &lt;i&gt;Anguilla anguilla&lt;/i&gt; L., has been reported from several European countries. The entire life history of this parasite has recently been elucidated in our laboratory. Young larvae leave the swim bladder of the host via the pneumatic duct and reach the water through the digestive tract. They are ingested by small copepods (Cyclopoida), which act as intermediate hosts. Larvae remain in the hemocoel until the copepods are eaten by the final host, the European eel. Larvae penetrate through the intestinal wall and reach the swim bladder where they develop into adults. When infected copepods are eaten by other small fish, such as carp...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological vectors; Disease transmission; Fish diseases; Food chains; Freshwater fish; Hosts; Life cycle; Parasites; Parasitic diseases; Predation; Predators; Swim bladder; Anguillicola crassus.
Ano: 1990
URL: http://www.vliz.be/imisdocs/publications/3074.pdf

Extended serotyping scheme for &lt;i&gt;Vibrio anguillarum&lt;/i&gt; with the definition and characterization of seven provisional O-serogroups
Provedor de dados: 27
Autores: 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 &lt;i&gt;Vibrio anguillarum&lt;/i&gt; 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&lt;sub&gt;2&lt;/sub&gt;3. However, the existence of further &lt;i&gt;V. anguillarum&lt;/i&gt; 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

Incorporation of brewery activated sludge-single proteins (BSCP) in diets for &lt;i&gt;Clarias gariepinus&lt;/i&gt; B. fingerlings
Provedor de dados: 27
Autores: De Muylder, E.; Van Damme, P.; Vriens, L.; Nihoul, R.; Ollevier, F.P.
Brewery activated sludge-cell protein (BSCP) was incorporated in high quality feeds for &lt;i&gt;Clarias gariepinus&lt;/i&gt; fingerlings at levels of 4-22%. BSCP incorporation was found to have a positive effect on the growth performance up to levels of 22%. The optimum concentration of BSCP in feeds for &lt;i&gt;Clarias gariepinus&lt;/i&gt; was 14%. The problems associated with the use of activated sludge are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal nutrition; Single cell proteins; Clarias gariepinus.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3170

Experimentally induced infections of European eel &lt;i&gt;Anguilla anguilla&lt;/i&gt; with &lt;i&gt;Anguillicola crassus&lt;/i&gt; (Nematoda, Dracunculoidea) and subsequent migration of larvae
Provedor de dados: 27
Autores: Haenen, O.L.M.; Grisez, L.; De Charleroy, D.; Belpaire, C.; Ollevier, F.P.
Migration patterns of third-stage &lt;i&gt;Anguillicola crassus&lt;/i&gt; larvae, and pathogenesis of the lesions induced by third-stage larvae, was investigated in European eel &lt;i&gt;Anguilla anguilla&lt;/i&gt; L. Young elvers (1g) were fed infected &lt;i&gt;Paracyclops fimbriatus&lt;/i&gt; (Copepoda). Eel samples were collected and examined histologically at varying intervals during 6 mo post-infection period. Third-stage larvae (L-III) migrated directly through the intestinal wall and body cavity to the swimbladder within 17h post-infection. L-IV larvae were detected 3 mo post-infection, and immature adults were detected within 4 mo post-infection. The parasites occasionally showed aberrant migration paths. Pathological effects caused by the parasite...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Larvae Life cycle Pathology Anguilla anguilla (Linnaeus; 1758) Anguillicola crassus.
Ano: 1989
URL: http://www.vliz.be/imisdocs/publications/3029.pdf

Morphological and morphometric study of crustacean parasites within the genus &lt;i&gt;Lernaeocera&lt;/i&gt;
Provedor de dados: 27
Autores: Van Damme, P.A.; Ollevier, F.P.
Two species of &lt;i&gt;Lernaeocera&lt;/i&gt; are present in the southeastern North Sea. &lt;i&gt;Lernaeocera lusci&lt;/i&gt; infects bib &lt;i&gt;Trisopterus luscus&lt;/i&gt;, dragonet &lt;i&gt;Callionymus lyra&lt;/i&gt; and sand goby &lt;i&gt;Pomatoschistus minutus. L. minuta&lt;/i&gt; is a junior synonym of &lt;i&gt;L. lusci.&lt;/i&gt;. The second valid species, &lt;i&gt;L. branchialis&lt;/i&gt;, infects whiting &lt;i&gt;Merlangius merlangus&lt;/i&gt;. The two species can be morphologically separated by the antennary processes, which are present in &lt;i&gt;L. lusci&lt;/i&gt; and absent in &lt;i&gt;L. branchialis&lt;/i&gt;. Discriminant functions allow complete separation between &lt;i&gt;L. lusci&lt;/i&gt; and &lt;i&gt;L. branchialis&lt;/i&gt;. 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

Four polymorphic microsatellite markers in the European eel &lt;i&gt;Anguilla anguilla&lt;/i&gt; (L.)
Provedor de dados: 27
Autores: Daemen, E.; Volckaert, F.A.M.J.; Cross, T.F.; Ollevier, F.P.
Clones (&lt;i&gt;Anguilla anguilla&lt;/i&gt;) 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

Use of computer assisted sperm analysis (CASA) for monitoring the effects of pollution on sperm quality of fish: application to the effects of heavy metals
Provedor de dados: 27
Autores: Kime, D.E.; Ebrahimi, M.; Nysten, K.; Roelants, I.; Rurangwa, E.; Moore, H.D.M.; Ollevier, F.P.
Computer assisted sperm analysis (CASA) has been used to analyse the effects of cadmium and zinc on the motility of fish sperm treated either for 24h after partial dilution in an extender, or during the final dilution step on the microscope stage during video recording. The progressive motility of catfish sperm, which was not affected by storage for 24h, was decreased after exposure to 100 ppm cadmium or 2000 ppm zinc in extender for 24h. Only 1000 ppm cadmium or 2000 ppm zinc had any effect on motility when added to sperm at the final dilution stage. These results suggest that concentrations of cadmium which have been found to be present in fish gonads as a result of bioaccumulation from the water or diet may decrease the motility of sperm during...
Tipo: Info:eu-repo/semantics/article
Ano: 1996
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2993

The composition of the fish and crustacean community of the Zeeschelde estuary (Belgium)
Provedor de dados: 27
Autores: 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
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=1409

Population biology of &lt;i&gt;Anguillicola crassus&lt;/i&gt; in the final host &lt;i&gt;Anguilla anguilla&lt;/i&gt;
Provedor de dados: 27
Autores: Thomas, K.; Ollevier, F.P.
Eels were sampled twice a month (March 1990 though March 1991) at the Kolenhaven (Albertcanal, Genk, Belgium) and examined for &lt;i&gt;Anguillicola crassus&lt;/i&gt; nematodes in the swimbladder. Averaged over all samples, 90.2% of the 345 eels were infected with a mean intensity (averaged for all stages) of 17 nematodes. Thirty-one percent of all nematodes, which were adult worms or their remnants, were present in the swimbladder lumen, while the other 69% which consisted of the third or fourth larval stage and preadults were found in the swimbladder wall. No clear seasonal fluctuations in parasite prevalence or mean intensity were observed. Both L&lt;sub&gt;3&lt;/sub&gt;-larvae and mature adult worms were present throughout the year. Eggs or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance Endoparasites Life history Parasitic diseases Population density Seasonality Statistical analysis Swim bladder Anguilla anguilla (Linnaeus; 1758) Anguillicola crassus Belgium.
Ano: 1992
URL: http://www.vliz.be/imisdocs/publications/299071.pdf

Fish species of the lower Zeeschelde (Belgium): a comparison with historical checklists
Provedor de dados: 27
Autores: 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
Ano: 1994
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=1575

An index of biotic integrity characterizing fish populations and the ecological quality of Flandrian water bodies
Provedor de dados: 27
Autores: 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

The effect of supplemental ascorbic acid in enriched live food for &lt;i&gt;Clarias gariepinus&lt;/i&gt; larvae at startfeeding
Provedor de dados: 27
Autores: 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 (&lt;i&gt;Clarius gariepinus&lt;/i&gt;) larvae has been assessed in two 10-day culture trials. Three treatments received only &lt;i&gt;Artemia&lt;/i&gt; nauplii enriched with an experimental emulsion containing 0, 10 or 20% ascorbyl palmitate (AP) and yielding 530, 1200 and 1600 µg AA g&lt;sup&gt;-1&lt;/sup&gt; DW &lt;i&gt;Artemia&lt;/i&gt; , respectively; the other three treatments were fed the same &lt;i&gt;Artemia&lt;/i&gt; 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

The population dynamics of &lt;i&gt;Lernaeocera lusci&lt;/i&gt; and &lt;i&gt;L. branchialis&lt;/i&gt; on intermediate hosts
Provedor de dados: 27
Autores: Van Damme, P.A.; Ollevier, F.P.
The metapopulation dynamics of &lt;i&gt;Lernaeocera lusci&lt;/i&gt; and &lt;i&gt;L. branchialis&lt;/i&gt; on sole &lt;i&gt;Solea solea&lt;/i&gt; and flounder &lt;i&gt;Pleuronectes flesus&lt;/i&gt; were studied in the Dutch coastal area. Both fish species harboured large numbers of parasites when they arrived in the coastal area in the spring. Between April and June all parasites detached from the intermediate hosts and infected the definitive hosts (0+ whiting &lt;i&gt;Merlangius merlangus&lt;/i&gt; for &lt;i&gt;L. branchialis&lt;/i&gt;, and possibly sand goby &lt;i&gt;Pomatoschistus minutus&lt;/i&gt; for &lt;i&gt;L. lusci&lt;/i&gt;). Thereafter, flounder remained almost parasite-free until autumn. This suggests that &lt;i&gt;L. branchialis&lt;/i&gt; has...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parasites Population dynamics Lernaeocera branchialis Lernaeocera lusci ANE; North Sea.
Ano: 1996
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3143

The population dynamics of the parasitic copepode &lt;i&gt;Lernaeocera lusci&lt;/i&gt; (Bassett-Smith, 1896) on its definitive host
Provedor de dados: 27
Autores: Van Damme, P.A.; Hamerlynck, O.; Ollevier, F.P.
The mesoparasitic copepod &lt;i&gt;Lernaeocera lusci&lt;/i&gt; (Bassett-Smith, 1896) was recovered from first-year bib (&lt;i&gt;Trisopterus luscus&lt;/i&gt; L.) in the Voordelta (Southern Bight of the North Sea) from May until December 1989. Analysis of the seasonal abundance and of the population structure showed that transmission of infective stages to bib mainly occurred from June to September. From September to December the overall prevalence fluctuated around 70%. Maximum parasite population size (47/10&lt;sup&gt;4&lt;/sup&gt;m²) and the highest total egg number were recorded in September and October, respectively. It was found that total parasite mortality was significantly influenced by mortality of hosts carrying parasites. Natural mortality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parasites Population dynamics Lernaeocera lusci ANE; North Sea.
Ano: 1996
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3115

Efficacy of some anthelmintics against the swimbladder nematode &lt;i&gt;Anguillicola crassus&lt;/i&gt; of eel &lt;i&gt;Anguilla anguilla&lt;/i&gt; under saltwater conditions
Provedor de dados: 27
Autores: 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 &lt;i&gt;Anguillicola crassus&lt;/i&gt;, a swimbladder nematode of European eel &lt;i&gt;Anguilla anguilla&lt;/i&gt;. 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&lt;sup&gt;-1&lt;/sup&gt; showed a lower efficacy against &lt;i&gt;Anguillicola crassus&lt;/i&gt;. 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

Phenotypic characterization of the marine pathogen &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;piscicida&lt;/i&gt;
Provedor de dados: 27
Autores: Thyssen, A.; Grisez, L.; van Houdt, R.; Ollevier, F.P.
The taxonomic position of &lt;i&gt;Photobacterium damselae&lt;/i&gt; subsp. &lt;i&gt;piscicida&lt;/i&gt;, the causative agent of fish pasteurellosis, is controversial as this organism has also been described as '&lt;i&gt;Pasteurella piscicida&lt;/i&gt;'. To clarify the taxonomic position of the pathogen, a total of 113 &lt;i&gt;P. damselae&lt;/i&gt; subsp. &lt;i&gt;piscicida&lt;/i&gt; strains and 20 &lt;i&gt;P. damselae&lt;/i&gt; subsp. &lt;i&gt;damselae&lt;/i&gt; 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 &lt;i&gt;Photobacterium&lt;/i&gt; species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Numerical taxonomy.
Ano: 1998
URL: http://www.vliz.be/imisdocs/publications/238535.pdf

Paratenic hosts of the swimbladder nematode &lt;i&gt;Anguillicola crassus&lt;/i&gt;
Provedor de dados: 27
Autores: Thomas, B.; Ollevier, F.P.
The host specificity and population dynamics of &lt;i&gt;Anguillicola crassus&lt;/i&gt; 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&lt;sub&gt;3&lt;/sub&gt;-larvae of &lt;i&gt;Anguillicola crassus&lt;/i&gt;. Sixteen species were found to be infected: all the physoclist species examined (&lt;i&gt;Gymnocephalus cernua, Lepomis gibbosus, Ictalurus nebulosus, Stizostedion lucioperca, Gasterosteus aculeatus, Oreochromis niloticus&lt;/i&gt; and &lt;i&gt;Perca fluviatilis&lt;/i&gt;) and those physostome species of which a sufficient number could be examined to detect the infection (&lt;i&gt;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

A comparative study on the use of different preparations of decapsulated &lt;i&gt;Artemia&lt;/i&gt; cysts as food for rearing African catfish (&lt;i&gt;Clarias gariepinus&lt;/i&gt;) larvae
Provedor de dados: 27
Autores: Pector, R.; Tackaert, W.; Abelin, P.; Ollevier, F.P.; Sorgeloos, P.
African catfish (&lt;i&gt;Clarias gariepinus&lt;/i&gt;) larvae were fed on five preparations of decapsulated Great Salt Lake &lt;i&gt;Artemia&lt;/i&gt; 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

Comparison of the fatty acid profile of wild caught fingerlings and yolk sac sea bass (&lt;i&gt;Dicentrarchus labrax&lt;/i&gt;) larvae with cultured healthy larvae and larvae suffering from whirling disease
Provedor de dados: 27
Autores: Corneille, S.; Agius, C.; Ollevier, F.P.
Analysis of the fatty acids of total lipids of wild fingerlings (1-4 g) of sea bass (&lt;i&gt;Dicentrarchus labrax&lt;/i&gt;) 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

Palatability enhancing nutrients for the European eel, &lt;i&gt;Anguilla anguilla&lt;/i&gt; L.
Provedor de dados: 27
Autores: Pacolet, W.; Reynders, K.; Ollevier, F.P.
Feeding experiments with European glass eels &lt;i&gt;Anguilla anguilla&lt;/i&gt; L. demonstrated a high degree of attractiveness for the natural diets Tubifix and cod roe. Previous experiments had indicated that incorporation of bovine spleen and/or blood into paste feeds significantly improved the growth rate and survival. To increase feed consumption, the effect of some basic components available from the current generation of chemo-attractants were evaluated. Using a modified Omission Test Procedure, we focused on monosodiumglutamate, betaine, the nucleotides IMP and GMP, and fractions of cattle blood. These components were incorporated into non-attractive casein-based test diets and administered following standardized procedures to intensively...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed composition; Fish culture; Food additives; Food consumption; Food organisms; Nutritive value; Organoleptic properties.
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2884

An improved method for artificial infection of the European eel, &lt;i&gt;Anguilla anguilla&lt;/i&gt;, with &lt;i&gt;Anguillicola crassus&lt;/i&gt; (Nematoda, Dracunculoidea)
Provedor de dados: 27
Autores: 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 &lt;i&gt;Anguillicola crassus&lt;/i&gt;, a parasitical swim bladder nematode. For this purpose, an intermediate host, &lt;i&gt;Paracyclops fimbriatus&lt;/i&gt;, and a paratenic host, &lt;i&gt;Cyprinus carpio&lt;/i&gt;, 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

The future of population and molecular genetics of marine organisms: capita selecta
Provedor de dados: 27
Autores: Volckaert, F.A.M.J.; Beullens, K.; Ollevier, F.P.
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2902

Marine aquaculture in Flanders
Provedor de dados: 27
Autores: Ollevier, F.P.; Lavens, P.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2882

The role of &lt;i&gt;Callionymus lyra&lt;/i&gt; and &lt;i&gt;C. reticulatus&lt;/i&gt; in the life cycle of &lt;i&gt;Lernaeocera lusci&lt;/i&gt; in Belgian coastal waters (Southern Bight of the North Sea)
Provedor de dados: 27
Autores: Van Damme, P.A.; Maertens, D.; Arrumm, A.; Hamerlynck, O.; Ollevier, F.P.
A survey of the dragonet &lt;i&gt;Callionymus lyra&lt;/i&gt; and the reticulated dragonet &lt;i&gt;C. reticulatus&lt;/i&gt; from Belgian coastal waters (Southern Bight of the North Sea) in June 1991 revealed 34% of dragonets infected with 1-7 &lt;i&gt;Lernaeocera lusci&lt;/i&gt;. This same parasite infected 9% of the reticulated dragonets (mean intensity = 1). Parasite size is host-size-dependent. Of the parasites collected from &lt;i&gt;C. lyra&lt;/i&gt; 64% were gravid adults (substage X), and a significant positive relationship between the number of eggs and axial length of the parasite was found. The parasites were overdispersed within the dragonet population (&lt;i&gt;s²/m&lt;/i&gt;=1.67).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Callionymus lyra (Linnaeus; 1758) Callionymus reticulatus Valenciennes; 1837 Lernaeocera lusci.
Ano: 1993
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2793