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Registros recuperados: 79
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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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Automation of live food in industrial hatcheries: zootechnics and economics OMA
Dehasque, M.; Ooghe, B.; Wille, M.; Candreva, P.; Cladas, Y.; Lavens, P..
Tipo: Info:eu-repo/semantics/article
Ano: 1997 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2547
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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
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Carbon, nitrogen, oxygen, and hydrogen-stable isotope ratios in <i>Artemia</i> from different geographical origin OMA
Schimmelmann, A.; Lavens, P.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia.
Ano: 1987 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3747
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Characterization of brine shrimp <i>Artemia</i> from Cam Ranh Bay in Central Vietnam OMA
Quynh, V.D.; Lavens, P.; Léger, P.; Tackaert, W.; Sorgeloos, P..
<i>Artemia</i> cysts collected from inoculation experiments in Cam Ranh salterns are evaluated for their potential use in aquaculture. Cyst biometrics, hatching quality, naupliar fatty acid profile and naupliar growth were measured and compared to reference <i>Artemia</i> strains. Cyst characteristics reveal that the parthenogenetic strain (PR China) used in inoculations, was eliminated from the environment and that the remaining brine shrimp are likely to be composed of Macau and Great Salt Lake <i>Artemia</i> strains, and of their cross-breds. Differences in cyst diapause deactivation characteristics between Macau and Great Salt Lake <i>Artemia</i> may have resulted in the disappearance of Macau...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cysts Inoculation Inoculation Quality Salt lakes Artemia ISEW; Viet Nam; Cam Ranh Bay.
Ano: 1988 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3244
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Clownfish as a reference model for nutritional experiments and determination of egg/larval quality OMA
Delbare, D.; Lavens, P.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2549
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Cofeeding of phospholipids to turbot <i>Scophthalmus maximus</i> L. larvae as a tool to reduce live food consumption OMA
Dhert, P.; González Félix, M.; Van Ryckeghem, K.; Geurden, I.; Thysen, F.; Lebegue, E.; Lavens, P.; Sorgeloos, P..
The possible benefits of feeding a formulated diet, together with <i>Artemia</i> , to first-feeding turbot larvae were investigated. Five dietary regimes were used: control ( <i>Artemia</i> only), cofeeding with a diet rich in phospholipid (PL) from bovine brain, cofeeding with a diet rich in free fatty acids (FFA) from the same source, cofeeding with a commercial diet (Lansy A2), and a formulated feed only (PL-rich diet). All treatments with artificial diets and the control treatment that received <i>Artemia</i> exclusively gave a similar survival rate of the fish at day 29. Cofeeding with artificial diets resulted in a lower growth rate than the control treatment. Cofeeding the larvae with PL-rich or FFA-rich diets did...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture techniques; Feeding experiments; Fish culture; Fish larvae; Food organisms; Scophthalmus maximus; Artemia.
Ano: 1999 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4014
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Comparison of an artificial diet and live food as broodstock maturation diets for seabream (<i>Sparus aurata</i>): effects on spawning and egg quality OMA
Dehasque, M.; Candreva, P.; Carrascosa, M.; Lavens, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sparus aurata [Gilthead].
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2546
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Controlled production of <i>Artemia</i> cysts under standard conditions in a recirculating culture system OMA
Lavens, P.; Sorgeloos, P..
A flow-through culture system is described for the controlled production of <i>Artemia</i> cysts in 10 liter aquaria using 50 promille artificial seawater enriched with Fe-EDTA as culture medium, micronised rice bran as food source and cyclic flushes of the cultures with N<sub>2</sub>-gas as induction mechanism for oviparity. The culture water is recirculated over a rotating biological contactor, a settling tank and a UV disinfection unit. Cysts are continuously harvested by filtration of the culture effluent. Production yields average 0.5 g dry cysts per day and per aquarium.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture techniques; Artemia.
Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3267
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Decapsulated cysts and <i>Artemia</i> flakes as alternative food sources for the culture of <i>Penaeus monodon</i> postlarvae OMA
Stael, M.; Sanggontanagit, E.; Van Ballaer, E.; Puwapanich, N.; Tunsutapanich, A.; Lavens, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia; Penaeus monodon [giant tiger prawn].
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2628
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Design, operation, and potential of a culture system for the continuous production of <i>Artemia</i> nauplii OMA
Lavens, P.; Sorgeloos, P..
A flow-through system is described for the controlled production of <i>Artemia</i> nauplii. High densities of adult brine shrimp are induced to ovoviviparity through diet manipulation, optimal culture water exchange, and high constant oxygen levels. The nauplii produced are separated from the culture tank effluents in a special recuperation filter system. The culture water is recirculated over a rotating biodisc, a cross-flow sieve, and a plate separator.The potential of this nauplii production system for application in aquaculture hatcheries is discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia.
Ano: 1987 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3174
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Determination of vitamin E in aquatic organisms by high-performance liquid chromatography with fluorescence detection OMA
Huo, J.-Z.; Nelis, H.; Lavens, P.; Sorgeloos, P.; De Leenheer, A.P..
A liquid chromatographic (HPLC) method has been developed for the quantitative determination of different forms of vitamin E (alpha-, gamma-, and delta-tocopherol) in aquatic organisms. The assay consists of a simple extraction with methanol containing butylhydroxytoluene (BHT) as an antioxidant, followed by reversed phase chromatography with fluorescence detection. The efficiency of the extraction method was equivalent or superior to that of more complex approaches for the isolation of tocopherols. Linearity has been achieved over the range of 0.02 to 3 µg/ml for alpha-tocopherol and within-run and between-run coefficients of variation at three levels were 0.7-2.9 and 1.2-3.7%, respectively. The recovery at three concentrations ranged from 73.8 to 96.6%...
Tipo: Info:eu-repo/semantics/article
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2978
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Development of a lipid-enrichment technique for <i>Artemia</i> juveniles produced in an intensive system for use in marine larviculture OMA
Dhont, J.; Lavens, P.; Sorgeloos, P..
Although there exists an obvious inclination to replace live larval food by formulated feeds, <i>Artemia nauplii</i> are still essential in the larviculture of marine fish species. So far, on-grown <i>Artemia</i> are rarely used in larviculture although they offer several advantages over <i>Artemia nauplii</i>: e.g. they contain a higher individual protein and energy content thus improving the fish larvae's energy budget; an equal amount of live food is reached with far less individuals thus a considerable saving of <i>Artemia</i> cysts; their composition of (n-3) highly unsaturated fatty acids (HUFA) may easily be improved by applying enrichment techniques. This study deals with the development of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish culture; Fish larvae; Food organisms; Intensive culture; Lipids; Nutritive value; Artemia.
Ano: 1991 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2854
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Dietary ascorbic acid requirements during the hatchery production of turbot larvae OMA
Merchie, G.; Lavens, P.; Dhert, Ph.; Garcia Ulloa Gómez, M.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P..
The effect of the high ascorbic acid (AA) levels transferred through enriched live food was evaluated for turbot <i>Scophthalmus maximus</i> larvae in two consecutive feeding experiments. The same feeding strategy was applied to all treatments, except for the AA content in the live food which was manipulated through bioencapsulation with ascorbyl palmitate. This resulted finally in a low, medium and high-AA treatment. The AA incorporation levels in the turbot larvae (up to 1400 µg AA g DW<sup>-1</sup>) were correlated with the AA content of the live food administered. However, feeding the high AA concentration resulted in the same values as for the medium treatment, indicating a saturation of the body AA reserves. Under standard...
Tipo: Info:eu-repo/semantics/article
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3022
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Dietary effects of DHA/EPA on culture performance and fatty acid composition of<i>Penaeus monodon</i> postlarvae OMA
Kontara, E.K.M.; Lavens, P.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Penaeus monodon [giant tiger prawn].
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2571
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Dietary n-3 HUFA and DHA/EPA requirements of <i>P. vannamei</i> postlarvae OMA
Naessens, E.; Van Hauwaert, A.; Cobo, M.L.; Townsend, S.; Ramos, X.; Wouters, R.; Lavens, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Penaeus vannamei.
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2588
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Effect of broodstock nutrition on the quality of turbot (<i>Scophthalmus maximus</i>) eggs and larvae OMA
Dhert, Ph.; Lavens, P.; Bijnens, R.; Brunel, A.; Merchie, G.; Sorgeloos, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Scophthalmus maximus (Linneaus; 1758).
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2551
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Effect of dietary essential fatty acids on egg quality and larviculture success of the greasy grouper (<i>Epinephelus tauvina</i> F.): preliminary results OMA
Dhert, P.; Lim, L.C.; Lavens, P.; Chao, T.M.; Chou, R.; Sorgeloos, P..
In spite of its aquaculture potential, the larval rearing of greasy grouper (<i>Epinephelus tauvina</i>) remains problematic and is not yet commercially feasible. The low and unpredictable larval survival is due to difficulties encountered in spawning the broodstock, the small size of the larvae at first feeding, and the high sensitivity of the larvae until day 45. The nutritional requirements for the broodstock as well as for the young larvae are still enigmatical. In this presentation the impact of supplementing the highly unsaturated fatty acids (HUFA), eicosapentaenoic (EPA), and docosahexaenoic acid (DHA) to the broodstock and larval diets is illustrated.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diets; Fatty acids; Fish culture; Fish eggs; Fish larvae; Nutritional requirements; Survival.
Ano: 1991 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2852
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Effect of n-3 HUFA and DHA/EPA ratio in enriched live feed on fatty acid composition and culture performance of <i>Penaeus vannamei</i> larvae OMA
Naessens, E.; Wouters, R.; Cobo, M.L.; Vargas, V.; Pedrazzoli, A.; Van Hauwaert, A.; Lavens, P..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Penaeus vannamei.
Ano: 1995 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2589
Registros recuperados: 79
Primeira ... 1234 ... Última
 

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