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Registros recuperados: 251
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A combined salinity/countercurrent stress test to evaluate stress sensitivity of juvenile European sea bass <i>Dicentrarchus labrax</i> L. OMA
Coutteau, P.; Geurden, I.; Schwarz, L.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dicentrarchus labrax (Linnaeus; 1758) [Bass].
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2538
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A comparative study on the use of different preparations of decapsulated <i>Artemia</i> cysts as food for rearing African catfish (<i>Clarias gariepinus</i>) larvae OMA
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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A culture system for <i>Artemia, Daphnia</i>, and other invertebrates, with continuous separation of the larvae OMA
Sorgeloos, P.; Persoone, G..
An easily constructed apparatus is described in which adult invertebrates can be reared with automatic feeding and with automatic and continuous separation of the offspring from the adults.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Culture media; Larvae.
Ano: 1973 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3471
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A new artificial diet for the early weaning of seabass (<i>Dicentrarchus labrax</i>) larvae OMA
Devresse, B.; Candreva, P.; Léger, P.; Sorgeloos, P..
The weaning of marine fish larvae is a critical step in larval rearing. The successful transition from live food to an artificial feed depends among others on the quality of the dry feed used (e.g. freshness of ingredients, digestibility, quality of the formulation) and the larvae themselves (e.g. age, behaviour towards artificial diets, development of the digestive tract, efficiency of certain metabolic pathways). The present study shows the results obtained with a new artificial diet formulated for the weaning phase of marine fish larvae (<i>Dicentrarchus labrax</i>) in commercial hatcheries.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artificial feeding; Feed composition; Fish culture; Fish larvae; Hatcheries; Dicentrarchus labrax [Bass].
Ano: 1991 URL: http://www.vliz.be/imisdocs/publications/262322.pdf
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A new test system for the evaluation of toxic levels of liposoluble products in the aquatic food chain using <i>Artemia</i> and <i>Mysidopsis bahia</i> as experimental animals OMA
Van Sprang, P.; Léger, P.; Sorgeloos, P..
A new test system is described for the evaluation of toxic levels of liposoluble products in the aquatic food chain using <i>Artemia</i> and <i>Mysidopsis bahia</i> (M.) as experimental animals. For this, freshly released juveniles (<24h old) of <i>M. bahia</i> are transferred to the experimental bioassay test system, cultured under standard conditions and fed 24h old purposely contaminated <i>Artemia</i> nauplii. After 11 days, data on survival, reproductive characteristics, individual length and dry weight are recorded and treated statistically.
Tipo: Info:eu-repo/semantics/article
Ano: 1991 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2910
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A simple semi flow-through culture technique for the controlled super-intensive production of <i>Artemia</i> juveniles and adults OMA
Dhert, P.; Bombeo, R.; Lavens, P.; Sorgeloos, P..
A simple semi flow-through <i>Artemia</i> culture unit is described for possible integration in marine fish and shellfish hatcheries as a source of a cheap nursery diet. The system does not require the use of feeding pumps and involves minimal care. Food preparation and addition to the feeding tank is reduced to one or two manipulations per day during the meta-nauplius stages (day 1-3) and the juvenile stages (day 4-14), respectively. Biomass productions are superior to those reported to those for stagnant culture systems and are comparable to those demonstrated for flow-through culture units. This simple rearing technique offers the possibility of producing brine shrimp populations with a uniform size. Furthermore, by varying the feeding...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia.
Ano: 1992 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2755
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A simple test for quality evaluation of cultured fry of marine fish OMA
Dhert, P.; Lavens, P.; Sorgeloos, P..
A stress test is proposed for the evaluation of the physiological condition of fish larvae in nutritional studies. The test was used in a study of quantitative (n-3) highly unsaturated fatty acids (HUFA) requirements in larval <i>Lates calcarifer</i> and <i>Siganus guttatus</i>. It enabled to suggest fast intervention at reduced larval quality and allowed to prevent mass mortalities. The stress test offered valuable information for the quantification study of fatty acid requirements in marine fish larvae. In <i>Lates</i> demands for fatty acids were detected in metamorphosis. In <i>Siganus</i> on the other hand, the sensitivity of the larvae was considerably reduced after short (n-3) HUFA boosting of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Fry; Quality control; Tests.
Ano: 1992 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2761
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A standard experimental diet for the study of fatty acid requirements of weaning and first ongrowing stages of European sea bass (<i>Dicentrarchus labrax</i> L.): selection of the basal diet OMA
Coutteau, P.; Van Stappen, G.; Sorgeloos, P..
A standard experimental diet was developed to study lipid nutrition in marine fish larvae during weaning and first ongrowing. Basal diets were prepared by extrusion-cooking, crumbling of the pellets, and sieving to obtain particles in the size ranges 150-300 µm and 300-500 µm. Three protein sources in the extruded basal diet were evaluated: (1) micronized cod protein granulate (COD); (2) a mixture of casein, gelatin, and albumin (CGA); (3) a mixture of cod fish meal, whey protein, soybean protein concentrate, albumin, hemoglobin meal, and wheat gluten (MIX). A variable lipid fraction was added to the extruded nucleus by coating the particles with an emulsion, coconut oil (COCO), or fish oil emulsion (FO), in a fluidized bed granulator. European sea bass...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dicentrarchus labrax (Linnaeus; 1758) [Bass].
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2541
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A study on the DHA content of T-ISO and its impact on preparing rations for larviculture OMA
Tzovenis, I.; De Pauw, N.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2644
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Accumulation of trimethoprim, sulfamethoxazole, and <i>N</i>-acetylsulfamethoxazole in fish and shrimp fed medicated <i>Artemia franciscana</i> OMA
Chair, M.; Nelis, H.J.; Leger, P.; Sorgeloos, P.; De Leenheer, A.P..
In a previous paper (H.J. Nelis, P. Léger, P. Sorgeloos, and A.P. De Leenheer, Antimicrob. Agents Chemother. 35:2486-2489, 1991) it was reported that two selected antibacterial agents, i.e. trimethoprim and sulfamethoxazole, can be efficiently bioencapsulated in nauplii of the brine shrimp <i><i>Artemia</i> franciscana</i> for administration to fish. This follow-up study showed that larvae of the sea bass and the turbot as well as postlarvae of the white shrimp accumulate the therapeutic agents in high quantities when fed medicated <i>A. franciscana</i>. To monitor their levels as a function of time, the liquid chromatographic method originally developed for the analysis of <i>A. franciscana</i> was modified...
Tipo: Info:eu-repo/semantics/article
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2923
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Advances in the enrichment of rotifers and <i>Artemia</i> as food sources in marine larviculture OMA
Léger, P.; Grymonpré, D.; Van Ballaer, E.; Sorgeloos, P..
A summary is given of experiments conducted regarding the enrichment of rotifers and <i>Artemia</i> for use as food sources marine larviculture, with particular reference to levels of omega 3-HUFA.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brine shrimp culture; Crustacean culture; Fatty acids; Food organisms; Nutritive value; Artemia; Rotifera.
Ano: 1989 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2880
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An improved separator box for <i>Artemia</i> nauplii and other phototactic invertebrates OMA
Persoone, G.; Sorgeloos, P..
1. A simple cylindrical hatching and separator box is described for <i>Artemia salina</i>nauplii (and other phototactic invertebrates), in which the "corner seeking effect" responsible for poor separation is avoided, and from which nauplii can be recovered very conveniently. 2. Separation is achieved by partly unscrewing an internal and closed cylinder from its fixed counter-part glued to the bottom of the box, till two slits are freed through which the nauplii migrate from the darkened internal hatching cylinder into the illuminated exterior compartment. Rescrewing the former cylinder separates the larvae from debris and unhatched eggs.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hatching; Instruments; Nauplii; Phototaxis; Artemia.
Ano: 1972 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3460
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An inexpensive automatic counter for cultures of aquatic organisms OMA
Van Outryve, E.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article
Ano: 1976 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3530
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An inexpensive turbidimeter for the automatic culturing of filter feeders OMA
Versichele, D.; Bossuyt, E.; Sorgeloos, P..
Automatization in the food distribution is necessary for the controlled culturing of filter feeders in high densities. Numerous devices have been described to distribute specific quantities of food suspension at preset time intervals (cf. review in Kinne, 1977). The number of systems which, however, add food whenever a preset critical turbidity of the medium is exceeded are rather limited. They furthermore are either very expensive (sophisticated equipment) or have to be cleaned very often (cf. review in Sorgeloos et al., 1976). We tried to simplify the technological complexity of the existing systems and developed an inexpensive, automatic, self cleaning food distributor. This apparatus measures the turbidity of the culturing medium which is pumped into a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture techniques; Filter feeders; Turbidity sensors.
Ano: 1979 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3625
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An intensive approach to Atlantic halibut fry production OMA
Holmefjord, I.; Gulbrandsen, J.; Lein, I.; Refstie, T.; Léger, P.; Harboe, T.; Huse, I.; Sorgeloos, P.; Bolla, S.; Olsen, Y.; Reitan, K.I.; Vadstein, O.; Øie, G.; Danielsberg, A..
The larval stage is regarded to be the main bottleneck of halibut production. Halibut eggs were obtained from captive broodstock both by stripping and by natural spawning. Artificial photoperiods were used to increase the total spawning season. Yolk sac larvae are presently produced either in small stagnant units or in large flow through systems. A major consideration is to avoid stress of the larvae, caused by mechanical disturbances of the larvae and by high bacterial load or high ammonia levels in the water.The experimentation showed that halibut larvae began to ingest algae earlier than rotifers <i>Brachionus</i> sp. Supplementation of algae to first feeding tanks resulted in enhanced survival and growth rate of the larvae. Both rotifers...
Tipo: Info:eu-repo/semantics/article
Ano: 1993 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2709
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An oral challenge for turbot larvae with <i>Vibrio anguillarum</i> OMA
Chair, M.; Dehasque, M.; Van Poucke, S.; Nelis, H.; Sorgeloos, P.; De Leenheer, A.P..
There is a need for a standard in vitro procedure to infect larval fish with bacteria. Such a procedure could be used as a tool to evaluate fish quality, verify fish sensitivity to a certain bacterial strain or evaluate the pathogenicity of a bacterium towards a given fish species. The availability of a challenge test is a prerequisite in studies dealing with the effect of different medicinal treatments on diseased fish. An oral challenge test would offer the possibility to investigate the routes of infection via the digestive tract, i.e. after feeding contaminated feeds. The present study aims to verify this hypothesis and proposes a standard challenge procedure for turbot (<i>Scophthalmus maximus</i>) larvae with a pathogenic <i>Vibrio...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial diseases; Digestive system; Disease control; Fish culture; Fish diseases; Fish larvae; Marine fish; Pathogenic bacteria; Vibrio anguillarum.
Ano: 1994 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2552
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Automation in stock-culture maintenance and juvenile separation of the mysid <i>Mysidopsis bahia</i> (Molenonck) OMA
Léger, P.; Sorgeloos, P..
A batch system with subgravel filter for stock-culture maintenance of <i>Mysidopsis bahia</i> in artificial sea water is described. The feeding of mysids on <i>Artemia</i> is optimized through the cyclic pumping of brine shrimp instar I nauplii from a refrigerator to the stock-cultures. An easily constructed incubator-separator apparatus is described for the standardized harvesting of mysid juveniles to be used as test organisms.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Automation; Crustacean culture; Mysidopsis bahia.
Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3419
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Availability of reference <i>Artemia</i> cysts OMA
Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cysts; Artemia.
Ano: 1981 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3708
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Availability of reference <i>Artemia</i> cysts OMA
Sorgeloos, P..
Biometrical, biochemical and food-value characteristics of <i>Artemia</i> nauplii vary with the source of the cyst material. In order to facilitate intercalibration and/or comparison of research conducted with cysts from different sources, homogenous cyst material can now be obtained from the <i>Artemia</i> Reference Center (State University of Ghent, J. Plateaustraat 22, B-9000 Ghent, Belgium). The reference cysts have been tested extensively for hatching characteristics, biometrics, fatty-acid content, pesticide contamination and effectiveness as larval food for various crustaceans and fishes.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cysts; Artemia.
Ano: 1980 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3694
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Baker's yeast as a potential substitute for live algae in aquaculture diets: <i>Artemia</i> as a case study OMA
Coutteau, P.; Lavens, P.; Sorgeloos, P..
In this study baker's yeast was evaluated as a substitute for live <i>Dunaliella tertiolecta</i> algae in the culture of the brine shrimp <i>Artemia</i> . Consumption of fresh baker's yeast resulted in poor growth and survival of brine shrimp. However, the nutritional value of the yeast significantly improved after complete removal of the yeast cell wall by enzymatic treatment. Baker's yeast was also made digestible for <i>Artemia</i> by simple chemical treatment which did not reduce rigidity of the yeast cell. The external mannoprotein layer of the yeast cell wall is probably the major barrier to digestion by <i>Artemia</i> . Chemically treated baker's yeast offers promising possibilities as a substitute for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diets; Yeasts; Artemia; Saccharomyces cerevisiae.
Ano: 1990 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3064
Registros recuperados: 251
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