Consulta: creatorFacets:"Lavens, P."
Registros recuperados: 79
Data/hora: 01/06/2024 06:03:07

Influence of different diets on length and biomass production of brine shrimp Artemia franciscana (Kellog, 1906)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: García-Ulloa, M.; Gamboa-Delgado, J.; Zabala-Aguirre, J.L.; Ogura-Fujii, T.; Lavens, P.
Total length and biomass production of the brine shrimp Artemia franciscana were studied fed on soybean and wheat micropulverized meals (applied alone or mixed at different proportions), live microalgae (Tetraselmis suecica and Chaetoceros calcitrans), and dried Spirulina as diets. Eight diets were tested in triplicates during 10 days. Significant differences (P &lt; 0.05) were observed from day 1 onwards. The mixed meal-based diets showed better production results. At day 1, the Artemia nauplii fed on the 70% wheat meal/ 30% soya meal diet were 30% longer compared to the animals from the C. calcitrans group. At day 10, the organisms fed with the 100% soya meal diet were 68% longer than those fed on the C. calcitrans diet. The final biomass production (wet...
Tipo: Journal Contribution
Palavras-chave: Length; Biomass; Brine shrimp culture; Length; Biomass; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1999
URL: http://hdl.handle.net/1834/3327

International study on &lt;i&gt;Artemia&lt;/i&gt; : 17. Energy consumption in cysts and early larval stages of various geographical strains of &lt;i&gt;Artemia&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Vanhaecke, P.; Lavens, P.; Sorgeloos, P.
Variations in dry weight, caloric content and ash content during cyst hatching and early larval development have been studied for various geographical strains of &lt;i&gt;Artemia&lt;/i&gt; . In general, decapsulated cysts contain 30 to 40% more energy than freshly hatched nauplii; for Chaplin Lake and Buenos Aires &lt;i&gt;Artemia&lt;/i&gt; this difference amounts to 57%. Ash contents increase as decapsulated cysts hatch into instar I and molt into instar II-III nauplii. Over a 24h larval developmental period individual dry weights and energy content of the nauplii decrease with 16-34% and 22-37% respectively.A small but significant correlation exists between the survival rate of starved nauplii and either the energy content of instar I and instar II-III...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cysts; Energy budget; Larval stages; Artemia.
Ano: 1983
URL: http://www.vliz.be/imisdocs/publications/261926.pdf

The effect of dietary n-3 HUFA and 22:6n-3/20:5n-3 ratio on white shrimp larvae and postlarvae
Provedor de dados: Open Marine Archive
Autores: Wouters, R.; Van Hauwaert, A.; Naessens, E.; Ramos, X.; Pedrazzoli, A.; Lavens, P.
The influence of varying dietary n-3 HUFA concentrations and ratios of 22:6n-3/20:5n-3 (DHA/EPA) on culture performance and fatty acid composition of white shrimp (&lt;i&gt;Penaeus vannamei&lt;/i&gt;) larvae and postlarvae was verified in two experiments. In a first experiment, shrimp (zoea 2-postlarvae 11) were fed rotifers (&lt;i&gt;Brachionus plicatilis&lt;/i&gt;) and &lt;i&gt;Artemia&lt;/i&gt; spp. nauplii that were enriched with different self-emulsifying concentrates: one HUFA-free coconut oil (T1), and three iso-HUFA concentrates with DHA/EPA ratios of 0.6 (T2), 2 (T3) and 4 (T4), respectively. In a second experiment, postlarvae were fed for 25 days (starting from postlarvae 10) on isolipidic semi-purified diets: one HUFA-free control (TA), and four...
Tipo: Info:eu-repo/semantics/article
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2987

Optimized feeding strategies in the larviculture of the Asian seabass &lt;i&gt;Lates calcarifer&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Dhert, P.; Duray, M.; Lavens, P.; Sorgeloos, P.
This paper reports on the progress made at the Tigbauan hatchery of SEAFDAC in the Philippines, with the larviculture of the Asian seabass &lt;i&gt;Lates calcarifer&lt;/i&gt; when using w3-HUFA enriched &lt;i&gt;Brachionus&lt;/i&gt; and &lt;i&gt;Artemia&lt;/i&gt; .In order to optimize the transitions of the different prey types, larval mouth size was analyzed as a function of larval development: San Francisco Bay (SFB) type &lt;i&gt;Artemia&lt;/i&gt; nauplii can be ingested from days 8 to 10 onwards, and Great Salt Lake (GSL) nauplii from days 10 to 15 (with some variations depending on growth differences between culture trials). In view of the high correlation between mouth size and total larval length, the feeding of different size classes of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diets Fish larvae Food organisms Artemia Brachionus Lates calcarifer ISEW; Philippines.
Ano: 1990
URL: http://www.vliz.be/imisdocs/publications/262323.pdf

Development of a lipid-enrichment technique for &lt;i&gt;Artemia&lt;/i&gt; juveniles produced in an intensive system for use in marine larviculture
Provedor de dados: Open Marine Archive
Autores: Dhont, J.; Lavens, P.; Sorgeloos, P.
Although there exists an obvious inclination to replace live larval food by formulated feeds, &lt;i&gt;Artemia nauplii&lt;/i&gt; are still essential in the larviculture of marine fish species. So far, on-grown &lt;i&gt;Artemia&lt;/i&gt; are rarely used in larviculture although they offer several advantages over &lt;i&gt;Artemia nauplii&lt;/i&gt;: 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 &lt;i&gt;Artemia&lt;/i&gt; 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

Variation in egg and larval quality in various fish and crustacean species
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.
It is generally accepted, that a major constraint in the further development of marine fish and crustacean aquaculture, is the variable quality of eggs and larvae used for the hatchery-production of fry. Nonetheless, valid criteria to evaluate optimal egg quality have not been identified yet. Instead, particular indicators, are used, e.g. the fertilization and hatching rate, overall culture success during the first rearing period, etc., but these are not totally objective because hatchery-specific conditions may interfere. The biochemical composition of the egg may be one of the possible determinants of egg quality, which can be evaluated on a more objectie basis. In this respect, studied have been initiated to analyze in freshly-released eggs, the levels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Biochemical composition; Crustacean culture; Eggs; Fatty acids; Fish culture; Hatcheries; Quality control; Vitamin C.
Ano: 1991
URL: http://www.vliz.be/imisdocs/publications/262328.pdf

Production, utilization and manipulation of &lt;i&gt;Artemia&lt;/i&gt; as food source for shrimp and fish larvae
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Léger, P.; Sorgeloos, P.
Larval culture of fish and shrimp can be seriously improved thanks to the results of recent research and development in the field of &lt;i&gt;Artemia&lt;/i&gt; production and utilization. The present article summarizes the most recent techniques for optimation in production and use of different stages of &lt;i&gt;Artemia&lt;/i&gt; in aquaculture:- cyst selection in function of hatching quality, purity, biometric characteristics, etc. - nauplii production: techniques for hatching, disinfection and decapsulation;- nutritional value of nauplii: quantitative aspects with regard to essential components and contaminants;- bioencapsulation of nauplii with different enrichment components: methodology and results in fish and shrimp culturing;- utilization of (pre-)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Brine shrimp culture; Developmental stages; Fish culture; Food organisms; Nutritive value; Shrimp culture; Artemia.
Ano: 1986
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3245

Effects of hydrogen peroxide treatment in &lt;i&gt;Artemia&lt;/i&gt; cysts of different geographical origin
Provedor de dados: Open Marine Archive
Autores: Van Stappen, G.; Lavens, P.; Sorgeloos, P.
Short-term treatment with peroxide solutions has been tested as a chemical way to break the diapause of &lt;i&gt;Artemia&lt;/i&gt; cysts of different species and geographical strains. The methodology was further standardized by analyzing the impact of the cyst hydration level and the application conditions (concentration, duration, temperature) on the hatching percentage. The peroxide treatment was most effective in deactivating diapause when applied on fully hydrated cysts, and showed a quantitative nature: a maximal positive effect was obtained for specific combinations of peroxide concentration and exposure time. The peroxide effect was preserved after processing and storage of treated cysts. The biochemical mechanisms possibly involved in induction and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1998
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=321

Performance of &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; broodstock fed diets with different fatty acid composition
Provedor de dados: Open Marine Archive
Autores: Cavalli, R.O.; Lavens, P.; Sorgeloos, P.
The effect of linoleic acid (18:2n-6) and n-3 highly unsaturated fatty acids (HUFA) on the reproductive performance and offspring quality of the freshwater prawn &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; was evaluated in a 180-day trial. Three isonitrogenous and isolipidic diets containing different levels of fatty acids, high 18:2n-6 and n-3 HUFA concentrations, high 18:2n-6 and low n-3 HUFA, and low 18:2n-6 and n-3 HUFA, were fed ad libitum to three groups of six females. Fecundity was improved by the addition of higher amounts of 18:2n-6 (from 3 to 13 mg g&lt;sup&gt;-1&lt;/sup&gt; DW). As a consequence of higher fecundity, smaller eggs were obtained most likely because the number of oocytes competing for a limited amount of yolk was higher. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brood stocks; Fecundity; Feeding experiments; Polyunsaturated fatty acids; Prawn culture; Macrobrachium rosenbergii.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4006

Effect of dietary essential fatty acids on egg quality and larviculture success of the greasy grouper (&lt;i&gt;Epinephelus tauvina&lt;/i&gt; F.): preliminary results
Provedor de dados: Open Marine Archive
Autores: 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 (&lt;i&gt;Epinephelus tauvina&lt;/i&gt;) 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

Clownfish as a reference model for nutritional experiments and determination of egg/larval quality
Provedor de dados: Open Marine Archive
Autores: 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

Effect of broodstock nutrition on the quality of turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;) eggs and larvae
Provedor de dados: Open Marine Archive
Autores: 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

Improved larviculture outputs of postlarval shrimp &lt;i&gt;Penaeus vannamei&lt;/i&gt; through supplementation of L-ascorbyl-2-polyphosphate in the diet
Provedor de dados: Open Marine Archive
Autores: Kontara, E.K.M.; Merchie, G.; Lavens, P.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, 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=2572

Variation of ascorbic acid content in different live food organisms
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Lavens, P.; Dhert, Ph.; Dehasque, M.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P.
Ascorbic acid (AA) is an essential nutrient in particle and live aquafeeds. In order to better assess the needs for this nutrient during larviculture the AA content of algae, rotifers and &lt;i&gt;Artemia&lt;/i&gt; was studied with respect to their suitability at startfeeding. In general, the microalgae evaluated were rich in AA (1000-4000 µgAA/gDW), but showed a considerable variability among the different species: e.g. the concentration in &lt;i&gt;Isochrysis&lt;/i&gt; and&lt;i&gt;Chlorella&lt;/i&gt; reached values 3-to 4-fold the percentage of &lt;i&gt;Tetraselmis&lt;/i&gt; (0.11% of DW). &lt;i&gt;Brachionus&lt;/i&gt; routinely cultured on &lt;i&gt;Chlorella&lt;/i&gt; contained 2300 µg AA/gDW. Cysts of various batches and strains of...
Tipo: Info:eu-repo/semantics/article
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2578

Effects of dietary vitamin C on fish and crustacean larvae
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Lavens, P.; Sorgeloos, P.
In order to assess the dietary needs for ascorbic acid (AA) at startfeeding, the AA content in the various live diets currently applied in aquaculture (algae, rotifers, &lt;i&gt;Artemia&lt;/i&gt; ) was studied. Application of boosting techniques using ascorbyl palmitate (AP) as the vitamin C source enabled the transfer of elevated levels of bioactive vitamin C (up to 2500µg AA.g DW&lt;sup&gt;-1&lt;/sup&gt;) via the live food chain into larvae of fish (&lt;i&gt;Clarias gariepinus, Dicentrarchus labrax, Scophthalmus maximus&lt;/i&gt;), shrimp (&lt;i&gt;Pennaeus vannamei&lt;/i&gt;) and prawn (&lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt;). This vitamin C enrichment procedure has proven to be a valuable technique, especially for the evaluation of the effects of...
Tipo: Info:eu-repo/semantics/article
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2587

In vitro hatching of &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; eggs: optimisation of environmental conditions
Provedor de dados: Open Marine Archive
Autores: De Caluwé, J.; Korkor, A.M.E.; Hisbi, D.; Lavens, P.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macrobrachium rosenbergii.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2544

Variations in lipid classes and fatty acid content in tissues of wild &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; (de Man) females during maturation
Provedor de dados: Open Marine Archive
Autores: Cavalli, R.O.; Tamtin, M.; Lavens, P.; Sorgeloos, P.
This study describes the variations in total lipid, lipid classes and fatty acids in the midgut gland (MG), ovary, and muscle tissue of wild-caught &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; to elucidate the importance of these components during sexual maturation. Mature females were captured in the Mae Klong River, Thailand, from July to September 1998, and divided into five groups according to their ovarian development. Total lipid levels in the ovary increased with maturation, but no concomitant decrease in MG lipids was observed. Thus, the lipid requirements of the developing ovary are thought to be more dependent on the immediate ingestion of dietary lipid than on MG reserves. Higher proportions of neutral lipids (NL), mainly triacylglycerols (TG),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biochemical composition; Fatty acids; Lipids; Muscles; Natural populations; Ovaries; Polyunsaturated fatty acids; Prawn culture; Sexual maturity; Macrobrachium rosenbergii; Thailand.
Ano: 2001
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6923

Evaluation of vitamin C-enriched &lt;i&gt;Artemia&lt;/i&gt; nauplii for larvae of the giant freshwater prawn
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Lavens, P.; Radull, J.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P.
The effects of high levels of ascorbic acid (AA) delivered through enriched live food has been verified through the successful culture of larval giant freshwater prawn, &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; Two successive feeding trials were set up using a control (550 µg AA g&lt;sup&gt;-1&lt;/sup&gt; DW) and two different AA-enrichment levels in &lt;i&gt;Artemia&lt;/i&gt; (1300 and 2750 µg AA g&lt;sup&gt;-1&lt;/sup&gt; DW). Under standard culture conditions, no differences in growth nor survival could be observed demonstrating that the nutritional requirements are below 550 µg AA g&lt;sup&gt;-1&lt;/sup&gt; DW, which is the normal level occurring in freshly-hatched &lt;i&gt;Artemia&lt;/i&gt; . However, a significantly positive effect could be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2582

Improvements in the larviculture of turbot &lt;i&gt;Scophthalmus maximus&lt;/i&gt;: zootechnical and nutritional aspects, possibility for disease control
Provedor de dados: Open Marine Archive
Autores: Dhert, Ph.; Lavens, P.; Dehasque, M.; Sorgeloos, P.
The rotifer feeding regime for larval turbot could be improved by more regular feeding and adjusted food distributions as to prevent overfeeding and digestion problems. All tests were successfully run in clear-water conditions indicating that the administration of algae is not essential during the rotifer stage. Larval requirements with respect to (n-3) RUFA, and more specifically DRA and DRA/EPA ratio appeared to change according to the age of the larvae and the physiological condition at the different larval stages. As early as the first week the stress resistance of the larvae could be improved by feeding rotifers specifically enriched in DRA. However, the continuous feeding of these live preys did not result in the best larval output, indicating that...
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=2553

The effect of HUFA and vitamin C-enriched rotifers on larval growth and survival of grouper (&lt;i&gt;Epinephelus suillus&lt;/i&gt;)
Provedor de dados: Open Marine Archive
Autores: Chavez, D.R.; Estenor, D.G.; Merchie, G.; Lavens, P.
Newly-hatched grouper larvae were reared for 24 days at a density of 15 larvae.l&lt;sup&gt;-1&lt;/sup&gt; in 250-l capacity cylindro-conical tanks filled with 200l seawater. Starting day 2, the larvae were given: &lt;i&gt;Chlorella&lt;/i&gt;-fed rotifers (Chl-R) rotifers fed Culture Selco (INVE Aquaculture NV, Belgium) (CS-R), and rotifers fed Culture Selco and consequently enriched for 24h with 20% vitamin C (CSC-R). The rotifer density in the larval tanks was maintained at 15 rotifers.ml&lt;sup&gt;-1&lt;/sup&gt;. The rotifer diet was supplemented with egg yolk until day 5. Each treatment had five replicates. Preliminary results show no significant difference in the survival rate of grouper larvae given Chl-R (4.21±2.8%), CS-R (2.56±0.9%) and CSC-R...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acids; Feeding experiments; Growth; Larvae; Survival; Vitamin C; Chlorella; Epinephelus suillus; Rotifera.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2537

Production of &lt;i&gt;Artemia&lt;/i&gt; in culture tanks
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2878

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: Open Marine Archive
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

Enrichment of live food with essential fatty acids and vitamin C: effects on milkfish (&lt;i&gt;Chanos chanos&lt;/i&gt;) larval performance
Provedor de dados: Open Marine Archive
Autores: Gapasin, R.S.J.; Bombeo, R.; Lavens, P.; Sorgeloos, P.; Nelis, H.J.
The effects of essential fatty acids (EFA) and vitamin C-enriched live food on growth, survival, resistance to salinity stress and incidence of deformity in milkfish larvae reared in tanks were investigated. Larvae were either fed rotifers cultured on &lt;i&gt;Chlorella&lt;/i&gt; sp. and newly hatched &lt;i&gt;Artemia&lt;/i&gt; nauplii (control), highly unsaturated fatty acid (HUFA)-enriched rotifers and &lt;i&gt;Artemia&lt;/i&gt; nauplii or HUFA + vitamin C-enriched rotifers and &lt;i&gt;Artemia&lt;/i&gt; nauplii. Milkfish growth in outdoor nursery ponds was also assessed to compare with growth in indoor tanks. Milkfish fed rotifers/&lt;i&gt;Artemia&lt;/i&gt; enriched with HUFA (32-48 mg dry weight, DW) or HUFA + vitamin C (33-45 mg DW) exhibited...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chanos chanos [milkfish].
Ano: 1998
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=303

Presentation on the objectives of the studygroup on aquaculture of the International Scheldt Faculty
Provedor de dados: Open Marine Archive
Autores: Klaassen, R.P.; Lavens, P.
Tipo: Info:eu-repo/semantics/article
Ano: 1992
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2839

Effect of vitamin C incorporation in live food on the larviculture success of aquaculture species
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Lavens, P.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P.
A study was undertaken to upgrade the levels of vitamin C in &lt;i&gt;Artemia&lt;/i&gt; and &lt;i&gt;Brachionus&lt;/i&gt; through bioencapsulation and to investigate in this way the requirements for ascorbic acid (AA) during larviculture of fish and prawn. Ascorbyl palmitate (AP) was used as the vit C source because of its stable and lipophylic characteristics which allowed its incorporation in booster emulsions and its readily conversion into AA by &lt;i&gt;Brachionus&lt;/i&gt; and &lt;i&gt;Artemia&lt;/i&gt; . Under standard conditions very high levels of AA could be incorporated into the &lt;i&gt;Artemia&lt;/i&gt; nauplii: supplementation of the enrichment emulsion with 20% AP (w/w) increased the AA-content up to 2000 ppm after 24h enrichment. Also in...
Tipo: Info:eu-repo/semantics/article
Ano: 1993
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2743

Decapsulated cysts and &lt;i&gt;Artemia&lt;/i&gt; flakes as alternative food sources for the culture of &lt;i&gt;Penaeus monodon&lt;/i&gt; postlarvae
Provedor de dados: Open Marine Archive
Autores: 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

State of the art in larviculture of fish and shellfish
Provedor de dados: Open Marine Archive
Autores: Sorgeloos, P.; Lavens, P.; Léger, P.; Tackaert, W.
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2897

Improved larval survival at metamorphosis of Asian seabass (&lt;i&gt;Lates calcarifer&lt;/i&gt;) using omega3-HUFA-enriched live food
Provedor de dados: Open Marine Archive
Autores: Dhert, P.; Lavens, P.; Duray, M.; Sorgeloos, P.
Asian seabass (&lt;i&gt;Lates calcarifer&lt;/i&gt;) larvae were fed &lt;i&gt;Brachionus&lt;/i&gt; cultured on &lt;i&gt;Chlorella&lt;/i&gt; and, as soon as ingestion was possible, different types of &lt;i&gt;Artemia&lt;/i&gt; , i.e., nauplii of the San Francisco Bay (SFB) strain, Great Salt Lake (GSL) strain or GSL nauplii that had been bioencapsulated with an emulsion containing high levels of the omega3-HUFAs (highly unsaturated fatty acids) 20:5 and 22:6. San Francisco Bay &lt;i&gt;Artemia&lt;/i&gt; with a good natural fatty acid profile and small body size could be offered earlier than the larger but HUFA-poor Great Salt Lake strain. The poor nutritional quality of the latter, however, could be corrected by enriching the nauplii with an omega3-HUFA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acids; Feeding experiments; Food additives; Food organisms; Metamorphosis; Nutritional requirements; Polyunsaturated fatty acids; Lates calcarifer.
Ano: 1990
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3079

International study on &lt;i&gt;Artemia&lt;/i&gt; : 41. Influence of culture conditions and specific diapause deactivation methods on the hatchability of &lt;i&gt;Artemia&lt;/i&gt; cysts produced in a standard culture system
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Tackaert, W.; Sorgeloos, P.
Using cyst material produced in an indoor cyst production system from 4 &lt;i&gt;Artemia&lt;/i&gt; strains belonging to the species &lt;i&gt;A. franciscana&lt;/i&gt; (San Francisco Bay, California, USA; Macau, Brazil; Great Salt Lake, Utah, USA) and &lt;i&gt;A. parthenogenetica&lt;/i&gt; (Lavalduc, France), different factors were studied that affect dormancy in brine shrimp cysts. Preliminary experiments under varying (a)biotic culture conditions revealed an interaction between environmental conditions and hatching characteristics. Results obtained under better-defined conditions demonstrated a significant positive correlation between the amount of food available to the adult &lt;i&gt;Artemia&lt;/i&gt; populations and the hatchability of their encysted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cysts; Diapause; Food availability; Hatching; Artemia; Artemia franciscana; Artemia parthenogenetica.
Ano: 1986
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3227

A simple test for quality evaluation of cultured fry of marine fish
Provedor de dados: Open Marine Archive
Autores: 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 &lt;i&gt;Lates calcarifer&lt;/i&gt; and &lt;i&gt;Siganus guttatus&lt;/i&gt;. 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 &lt;i&gt;Lates&lt;/i&gt; demands for fatty acids were detected in metamorphosis. In &lt;i&gt;Siganus&lt;/i&gt; 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

Maturation performance of &lt;i&gt;Penaeus vannamei&lt;/i&gt; co-fed &lt;i&gt;Artemia&lt;/i&gt; biomass preparations
Provedor de dados: Open Marine Archive
Autores: Naessens, E.; Lavens, P.; Gomez, L.; Browdy, C.L.; McGovern-Hopkins, K.; Spencer, A.W.; Kawahigashi, D.; Sorgeloos, P.
Few shrimp hatcheries successfully propagate captive broodstock on a commercial scale. Diets for acceptable maturation performance of &lt;i&gt;Penaeus vannamei&lt;/i&gt; have typically relied on the inclusion of marine polychaetes (bloodworm) from Panama or Maine, USA, which are expensive and are of unpredictable supply. Studies were therefore undertaken at experimental and commercial scale to replace or supplement the polychaetes by frozen ongrown &lt;i&gt;Artemia&lt;/i&gt; which were either non-enriched or bioencapsulated with specific boosters. In experiment 1 the control diet consisted of frozen squid only and was evaluated against broodstock diets where 60% of the squid was substituted by bloodworm or enriched &lt;i&gt;Artemia&lt;/i&gt; biomass....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Feeding experiments; Sexual maturity; Artemia; Penaeus vannamei.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2967

Preparation and use of &lt;i&gt;Artemia&lt;/i&gt; as food for shrimp and prawn larvae
Provedor de dados: Open Marine Archive
Autores: Dhont, J.; Lavens, P.; Sorgeloos, P.
The brine shrimp,&lt;i&gt;Artemia&lt;/i&gt; has played a significant role in the expansion of the commercial production of shrimp and prawn during the last decade. Being an off-the-shelf and easily usable live food,&lt;i&gt;Artemia&lt;/i&gt; is the main alternative for the natural diet of shrimp larvae. It appeared in the late 1970s that the nutritional value of &lt;i&gt;Artemia&lt;/i&gt;, especially for marine organisms, is not constant, but varies both geographically and temporally, causing unreliable outputs in marine larviculture. Through multidisciplinary studies in Japan and by the International Study on &lt;i&gt;Artemia&lt;/i&gt;, both the causes for nutritional variability in &lt;i&gt;Artemia&lt;/i&gt; and methods to improve poor-quality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1993
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2579

New developments in the high density flow-through culturing of brine shrimp &lt;i&gt;Artemia&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Baert, P.; De Meulemeester, A.; Van Ballaer, E.; Sorgeloos, P.
A closed culture system for the high density culturing of &lt;i&gt;Artemia spp.&lt;/i&gt; in 300-liter tanks using a new formula of artificial seawater and micronized waste products from agricultural crops as food is described. Culture conditions are greatly improved by applying a new filter technique and an electronic transparency meter which controls food distributions automatically. A total volume of 6,000 liters of culture water recirculated over a rotating biological contactor, a cross-flow sieve and a plate separator at a flow rate of 3000 liters per hour.Production yields obtained with this culture system, when extrapolated to a 1 m³ tank, indicate that 50 g of brine shrimp cysts can be converted into 20 kg of fresh (wet dry) pre-adult...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture systems; Brine shrimp culture; Recirculating systems; Artemia.
Ano: 1985
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3232

Effect of n-3 HUFA and DHA/EPA ratio in enriched live feed on fatty acid composition and culture performance of &lt;i&gt;Penaeus vannamei&lt;/i&gt; larvae
Provedor de dados: Open Marine Archive
Autores: 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

The history, present status and prospects of the availability of &lt;i&gt;Artemia&lt;/i&gt; cysts for aquaculture
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.
This paper provides an overview of the history of &lt;i&gt;Artemia&lt;/i&gt; cyst provision worldwide since the 1950s. It allows a better assessment of the current situation, characterized by poor yields from the main harvest site, the Great Salt Lake in Utah, USA, and to make prognoses about future supplies and demands.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cysts Hatcheries Literature reviews Zooplankton culture Artemia USA; Utah; Great Salt L.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=43

Progrès dans la larviculture des poissons grâce à une meilleure nutrition et à l'amélioration des zootechnies
Provedor de dados: Open Marine Archive
Autores: Dhert, Ph.; Lavens, P.; Dehasque, M.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2555

Laboratory and field variation in HUFA enrichment of &lt;i&gt;Artemia nauplii&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Coutteau, P.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2576

Maturation performance, offspring quality and lipid composition of &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; females fed increasing levels of dietary phospholipids
Provedor de dados: Open Marine Archive
Autores: Cavalli, R.O.; Menschaert, G.; Lavens, P.; Sorgeloos, P.
The effects of increasing levels of dietary phospholipids (PL) on the reproductive performance, egg and larval quality, and lipid composition of females of the freshwater prawn &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; were investigated. Three isolipidic diets containing similar amounts of highly unsaturated fatty acids but varying levels of PL (0.8, 2.4 and 4.6%) were fed during 180 days to three groups of eight females originating from Thai ponds. No significant differences were observed for fecundity, egg size and hatchability, starved larvae size, and size, survival and tolerance to stress of 8 day-old larvae. Similarly, no major differences in the lipid composition of the midgut gland, ovaries and muscle tissue of females could be detected. Results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal nutrition; Brood stocks; Complex lipids; Diets; Eggs; Feed composition; Feeding experiments; Females; Prawn culture; Sexual maturity; Sexual reproduction; Macrobrachium rosenbergii; Thailand.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3347

Carbon, nitrogen, oxygen, and hydrogen-stable isotope ratios in &lt;i&gt;Artemia&lt;/i&gt; from different geographical origin
Provedor de dados: Open Marine Archive
Autores: 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

Characterization of brine shrimp &lt;i&gt;Artemia&lt;/i&gt; from Cam Ranh Bay in Central Vietnam
Provedor de dados: Open Marine Archive
Autores: Quynh, V.D.; Lavens, P.; Léger, P.; Tackaert, W.; Sorgeloos, P.
&lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; strains, and of their cross-breds. Differences in cyst diapause deactivation characteristics between Macau and Great Salt Lake &lt;i&gt;Artemia&lt;/i&gt; 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

Maturation of &lt;i&gt;Penaeus vannamei&lt;/i&gt; by using dry pellets as a partial substitute of the natural diet
Provedor de dados: Open Marine Archive
Autores: Verstraete, P.; De La Mora, B.; Lavens, P.
Tipo: Info:eu-repo/semantics/article
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2657

Controlled production of &lt;i&gt;Artemia&lt;/i&gt; cysts under standard conditions in a recirculating culture system
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.
A flow-through culture system is described for the controlled production of &lt;i&gt;Artemia&lt;/i&gt; 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&lt;sub&gt;2&lt;/sub&gt;-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

Dietary n-3 HUFA and DHA/EPA requirements of &lt;i&gt;P. vannamei&lt;/i&gt; postlarvae
Provedor de dados: Open Marine Archive
Autores: 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

Solid-phase extraction of ascorbic acid 2-sulfate from cysts of the brine shrimp &lt;i&gt;Artemia fransiscana&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Nelis, H.J.; Merchie, G.; Lavens, P.; Sorgeloos, P.; De Leenheer, A.P.
Two producers are described for the solid-phase extraction of ascorbic acid 2-sulfate from cysts of the brine shrimp &lt;i&gt;Artemia&lt;/i&gt; . The first one is based on reversed-phase ion pair extraction on an octadecylsilica cartridge using tetrabutylammonium as the counterion, followed by elution with methanol. In the second procedure ascorbic acid 2-sulfate is retained on a DEAE silica cartridge and eluted with 0.1M sodium salicylate. Both approaches were used as part of a quantitative reversed-phase ion pair liquid chromatographic method with detection at 254nm. The anion exchange extraction procedure is superior to its ion pair counterpart in terms of recovery (88.7±3,5% versus 63.0±12.7%), reproducibility (CVs of 3.6-7.7% versus 6.3-18.7%), and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia franciscana.
Ano: 1994
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2643

Design, operation, and potential of a culture system for the continuous production of &lt;i&gt;Artemia&lt;/i&gt; nauplii
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.
A flow-through system is described for the controlled production of &lt;i&gt;Artemia&lt;/i&gt; 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

Dietary effects of DHA/EPA on culture performance and fatty acid composition of&lt;i&gt;Penaeus monodon&lt;/i&gt; postlarvae
Provedor de dados: Open Marine Archive
Autores: 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

The use of manipulated baker's yeast as an algal substitute for the laboratory culture of &lt;i&gt;Anostraca&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Coutteau, P.; Brendonck, L.; Lavens, P.; Sorgeloos, P.
The production of unicellular algae is laborious and is a major constraint for the culturing of aquatic filter-feeders. Because of their small particle size and their high protein content yeasts are considered as a promising substitute for micro-algae. Furthermore, recent work has shown that baker's yeast can be converted into a digestible diet for &lt;i&gt;Artemia&lt;/i&gt; by chemical treatment. The present study documents the use at laboratory scale of this manipulated yeast as an algal substitute for the culture of two anostracan species.The experiments were conducted with the brine shrimp &lt;i&gt;Artemia franciscana&lt;/i&gt; and the fairy shrimp &lt;i&gt;Streptocephalus proboscideus&lt;/i&gt;. A similar experimental set-up was used for both species....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anostraca.
Ano: 1992
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2720

Experiences on importance of diet for shrimp postlarval quality
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.
This paper gives an overview of own experiences with respect to the impact of dietary conditions on the quality of postlarval penaeid shirmp. Direct nutrient-specific effects are documented for highly unsaturated fatty acid (HUFA), phosphatidyl choline (PC) and ascorbic acid (AA). Specific immunostimulants may also contribute to an improved stress resistance of the shrimp fry. Last, but not least, some emphasis is placed on the role of the microflora during the hatchery rearing, the possible reduction of bacteria in the live food adminstered, and the use of probionts through the diet.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal nutrition; Condition factor; Diets; Disease resistance; Feed composition; Microorganisms; Polyunsaturated fatty acids; Rearing; Shrimp culture; Vitamin C; Artemia; Penaeidae [Penaeid shrimps].
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3876

Review of some aspects of marine fish larviculture
Provedor de dados: Open Marine Archive
Autores: Sorgeloos, P.; Dehasque, M.; Dhert, Ph.; Lavens, P.
Dependable availability of quality fry to stock grow-out production systems has been one of the most critical factors in the commercial success of industrial production of fish and shellfish. Large-scale production of marine fish fry was realized only from the 1980s onwards. Although Japan was the pioneer with the red sea bream (&lt;i&gt;Pagrus major&lt;/i&gt;), the most competitive hatchery methods were eventually developed in Europe for the sea bass (&lt;i&gt;Dicentrarchus labrax&lt;/i&gt;) and the gilthead sea bream (&lt;i&gt;Sparus aurata&lt;/i&gt;). Improved knowledge of larval dietary requirements, not the least with regard to (n-3) highly unsaturated fatty acids (HUFAs), combined with the adoption of live-food enrichment protocols allowed the...
Tipo: Info:eu-repo/semantics/article
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2627

&lt;i&gt;Cis&lt;/i&gt;- and &lt;i&gt;trans&lt;/i&gt;-canthaxanthin levels in &lt;i&gt;Artemia&lt;/i&gt; cysts of different geographical origin
Provedor de dados: Open Marine Archive
Autores: Nelis, H.; Lavens, P.; Sorgeloos, P.; Van Steenberge, M.; De Leenheer, A.P.
The carotenoid composition of &lt;i&gt;Artemia&lt;/i&gt; cysts from 17 geographical strains was studied. All-&lt;i&gt;trans&lt;/i&gt;-canthaxanthins and &lt;i&gt;cis&lt;/i&gt;-canthaxanthins were quantitatively determined using a non-aqueous reversed phase chromatographic method. In dehydrated cysts, the average &lt;i&gt;cis&lt;/i&gt;- and &lt;i&gt;trans&lt;/i&gt;-canthaxanthin levels (+/- SD) were 152 +/- 52 and 134 +/- 42 µg/g, respectively (range 38-227 and 67-201µg/g). The corresponding concentrations in hydrated cysts were (&lt;i&gt;cis&lt;/i&gt;) 177 +/- 60 µg/g (range 47-271 µg/g) and (&lt;i&gt;trans&lt;/i&gt;) 112 +/- 35 µg/g (range 52-169 µg/g). The &lt;i&gt;cis/trans&lt;/i&gt; concentration ratios averaged 1.13 (range 0.57-1.47) and 1.60 (range...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1987
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3196

Comparison of an artificial diet and live food as broodstock maturation diets for seabream (&lt;i&gt;Sparus aurata&lt;/i&gt;): effects on spawning and egg quality
Provedor de dados: Open Marine Archive
Autores: 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

HUFA levels in eggs of wild and cultured broodstock of &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Piyatiratitivorakul, S.; Menasveta, P.; Sorgeloos, P.
The variation in egg quality, i.e. the potential of the egg to produce viable fry, is still a limiting factor in the commercial production of marine fish and crustacean fry. Better knowledge in this field would contribute to improved and especially more consistent hatchery outputs and to the development of more suitable broodstock diets. So far, objective criteria to evaluate egg quality are scarce. However, it is very likely that the nutrient composition of the eggs may be a good indicator for egg viability as it reflects the nutrient demands of the developing embryo and larva. Since (n-3) highly unsaturated fatty acids (HUFAs) have been identified as essential nutrients for the larvae of marine fish, shrimp and prawn a case study has been initiated with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biochemical composition; Brood stocks; Comparative studies; Eggs; Fatty acids; Prawn culture; Shrimp culture; Macrobrachium rosenbergii.
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2876

Relationship between egg quality and fatty acid content of various turbot broodstocks (&lt;i&gt;Scophthalmus maximus&lt;/i&gt; L.)
Provedor de dados: Open Marine Archive
Autores: Peleteiro, J.B.; Lavens, P.; Rodríguez-Ojeja, G.; Iglesias, J.
The paper presents the data relating to the spawning quality of 20 turbot females (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;L.) subjected to natural and controlled photoperiods and fed with two different types of food. A comparison is made between the data usually utilized in hatcheries for defining the spawning quality (number of viable eggs, fertilization and hatching rates, number of larvae produced) and the highly unsaturated fatty acid (HUFA) content of fertilized eggs at the two-cell stage. The results indicate that there is no correlation between the HUFA content of the eggs and any of the egg quality criteria examined. Nevertheless, significant differences (p&lt;0,05) are found between the females fed with fresh trash fish (higher 18:3n-3, 20:4n-6,...
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=2591

Baker's yeast as a potential substitute for live algae in aquaculture diets: &lt;i&gt;Artemia&lt;/i&gt; as a case study
Provedor de dados: Open Marine Archive
Autores: Coutteau, P.; Lavens, P.; Sorgeloos, P.
In this study baker's yeast was evaluated as a substitute for live &lt;i&gt;Dunaliella tertiolecta&lt;/i&gt; algae in the culture of the brine shrimp &lt;i&gt;Artemia&lt;/i&gt; . 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 &lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; . 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

The use of yeast as single-cell protein in aquacultural diets
Provedor de dados: Open Marine Archive
Autores: Coutteau, P.; Lavens, P.
Aquaculture is becoming more and more an industrial practice. However, feed cost, which may mount up to around 30% of the total operating costs still appears to be one of the major constraints for further expansion of aquaculture. Due to the relatively inexpensive mass-production of yeasts, serious efforts have been made to evaluate the incorporation of these Single-Cell Proteins in aquaculture diets. The aim of this communication is to review the most important results obtained with yeast diets in the different fields of aquaculture. Several authors have reported on the utilization of yeast in fish feeds. Successful incorporation of yeast into fish diets allows replacement of 25-50% of the fish meal component. Because of their small particle size yeasts...
Tipo: Info:eu-repo/semantics/article
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3008

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: Open Marine Archive
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

A simple semi flow-through culture technique for the controlled super-intensive production of &lt;i&gt;Artemia&lt;/i&gt; juveniles and adults
Provedor de dados: Open Marine Archive
Autores: Dhert, P.; Bombeo, R.; Lavens, P.; Sorgeloos, P.
A simple semi flow-through &lt;i&gt;Artemia&lt;/i&gt; 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

Dietary ascorbic acid requirements during the hatchery production of turbot larvae
Provedor de dados: Open Marine Archive
Autores: 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 &lt;i&gt;Scophthalmus maximus&lt;/i&gt; 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&lt;sup&gt;-1&lt;/sup&gt;) 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

The influence of &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; broodstock diet on egg and larval characteristics
Provedor de dados: Open Marine Archive
Autores: De Caluwé, J.; Lavens, P.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macrobrachium rosenbergii.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2545

Simultaneous determination of a-tocopheryl acetate and tocopherols in aquatic organisms and fish feed
Provedor de dados: Open Marine Archive
Autores: Huo, J.-Z.; Nelis, H.; Lavens, P.; Sorgeloos, P.; De Leenheer, A.P.
In aquaculture, alpha-tocopheryl acetate (alpha-TA) is the main source of vitamin E used to fortify fish feed. Alpha-TA in fish is often determined indirectly, i.e. by alkaline hydrolysis, followed by quantitation of ‘total alpha-tocopherol’ (alpha-T) and substraction of the natively present alpha-T. The aim of this study was to develop an HPLC method for the simultaneous quantitative determination of alpha-TA and free tocopherols in aquatic organisms and fish feed. The assay consists of a simple extraction with methanol containing butylhydroxytoluene (BHT) as an antioxidant, followed by reversed-phase chromatography with consecutive UV and fluorescence detection of alpha-TA and tocopherols, respectively. The peak of the internal standard tocol in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitamin E; Vitamins.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4020

Reproductive performance of &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; females in captivity
Provedor de dados: Open Marine Archive
Autores: Cavalli, R.O.; Lavens, P.; Sorgeloos, P.
The breeding frequency, fecundity, egg hatchability, larval output and viability of pond-reared, mature &lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt; females were individually followed up during 180 d. Sexually mature prawns were maintained under controlled laboratory conditions (28.7 C and 12-h light/d) in a 190-L freshwater recirculation system and fed a formulated diet. Ovarian development, moulting and spawning events were checked daily. At least six consecutive moults were recorded for each of the 18 females. The duration of the intermoult period averaged 27.5 d and was not affected by ovarian development or spawning, but intermoult periods followed by spawning had significantly lower growth rates. From a total of 126 moulting events recorded, egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fecundity; Moulting; Prawn culture; Rearing; Recirculating systems; Reproductive cycle; Macrobrachium rosenbergii.
Ano: 2001
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=8494

Cofeeding of phospholipids to turbot &lt;i&gt;Scophthalmus maximus&lt;/i&gt; L. larvae as a tool to reduce live food consumption
Provedor de dados: Open Marine Archive
Autores: 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 &lt;i&gt;Artemia&lt;/i&gt; , to first-feeding turbot larvae were investigated. Five dietary regimes were used: control ( &lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; 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

Nutritional and zootechnical aspects in the hatchery production of seabream &lt;i&gt;Sparus aurata&lt;/i&gt; without algae: preliminary results
Provedor de dados: Open Marine Archive
Autores: De Wolf, T.; Dehasque, M.; Candreva, P.; Cirillo, A.; Caggiano, 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=2550

Larviculture of marine finfish: the current status
Provedor de dados: Open Marine Archive
Autores: Sorgeloos, P.; Dehasque, M.; Dhert, Ph.; Lavens, P.
Tipo: Info:eu-repo/semantics/article
Ano: 1994
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2670

Evaluation of mono- and mixed diets as food for intensive &lt;i&gt;Artemia&lt;/i&gt; culture
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; De Meulemeester, A.; Sorgeloos, P.
In order to alleviate the problems encountered when using live algae or rice bran as &lt;i&gt;Artemia&lt;/i&gt; food in intensive culturing, different alternative types of brine shrimp diets have been evaluated. Using a high-density flow-through recirculation culture system, a Single Cell Protein yeast and mixed diets, consisting of this yeast and micronized waste products from agricultural corps, were selected as suitable &lt;i&gt;Artemia&lt;/i&gt; feeds.Production yields after 2 weeks culturing varied from 2 to 5 kg live weight brine shrimp biomass per culture tank of 300 l. The mixed diets corn/soybean, corn/ wheat husks, and corn/yeast were found to be suitable or even better alternatives for the rice bran diet which is commonly used for feeding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1987
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3173

Automation of live food in industrial hatcheries: zootechnics and economics
Provedor de dados: Open Marine Archive
Autores: 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

Determination of vitamin E in aquatic organisms by high-performance liquid chromatography with fluorescence detection
Provedor de dados: Open Marine Archive
Autores: 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

The cryptobiotic state of &lt;i&gt;Artemia&lt;/i&gt; cysts, its diapause deactivation and hatching: a review
Provedor de dados: Open Marine Archive
Autores: 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=3179

Influence of dietary vitamin C dosage on turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;) and European sea bass (&lt;i&gt;Dicentrarchus labrax&lt;/i&gt;) nursery stages
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Lavens, P.; Storch, V.; Übel, U.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P.
Stable forms of vitamin C were verified as dietary sources of ascorbic acid (AA) for the nursery stages of European sea bass and turbot. In a first experiment, various concentrations of ascorbyl palmitate (AP) and one level of AA 2-polyphosphate (ApP) were evaluated in a semi purified diet for European sea bass, &lt;i&gt;Dicentrarchus labrax&lt;/i&gt;. A significantly lower AA concentration was detected in the fry fed the AP-supplemented diets compared to the ApP-fed group, providing evidence that AP is an inferior source of vitamin C for young stages of sea bass. ApP was subsequently selected for the determination of the AA requirements of both sea bass and turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;) fry. The AA levels incorporated in the body...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dicentrarchus labrax (Linnaeus; 1758) [Bass] Scophthalmus maximus (Linneaus; 1758).
Ano: 1996
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3045

Effect of vitamin C and astaxanthin on stress and disease resistance of postlarval tiger shrimp, &lt;i&gt;Penaeus monodon&lt;/i&gt; (Fabricius)
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Kontara, E.K.M.; Lavens, P.; Robles, R.; Kurmaly, K.; Sorgeloos, P.
Postlarvae of tiger shrimp, &lt;i&gt;Penaeus monodon&lt;/i&gt; (Fabricius), were fed semipurified diets supplemented with various levels of astaxanthin (AX) and ascorbic acid-polyphosphate (ApP): three groups were fed 230 mg AX kg&lt;sup&gt;-1&lt;/sup&gt; diet combined with 100, 1700 and 3400 mg ascorbic acid (AA) kg&lt;sup&gt;-1&lt;/sup&gt; diet, respectively; two diets contained 810 mg AX kg&lt;sup&gt;-1&lt;/sup&gt; mixed with 200 and 1700 mg AA kg&lt;sup&gt;-1&lt;/sup&gt;, respectively. Each treatment was run in four replicates. Incorporated levels of AA and AX, production output, and physiological condition were recorded after 4 weeks feeding. Whole-body AA (21-47 µg&lt;sup&gt;-1&lt;/sup&gt;) and AX concentrations (19-35 µg&lt;sup&gt;-1&lt;/sup&gt;)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Penaeus monodon [giant tiger prawn].
Ano: 1998
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=312

State of the art of Asian seabass &lt;i&gt;Lates calcarifer&lt;/i&gt; larviculture
Provedor de dados: Open Marine Archive
Autores: Dhert, P.; Lavens, P.; Sorgeloos, P.
Innovative techniques opened new perspectives in the larviculture or the Asian seabass in the 1980s. Induced spawning maximized egg production while sperm preservation reduced the problem of male brood-stock supply. Studies of biometric characteristics of the fish larvae resulted in improved feeding strategies with live food. This in turn permitted a more rational use of expensive &lt;i&gt;Artemia&lt;/i&gt; nauplii. Nutritional enhancement of the highly unsaturated fatty acid (HUFA) composition of the life food resulted in significant improvement of survival and physiological condition of the larvae of the metamorphosis. A salinity stress test enabled the evaluation of the larvae's physiological status and estimation of their HUFA-requirements during the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Larvae; Lates calcarifer.
Ano: 1992
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2767

Promising results in the seed culturing of the Manila clam &lt;i&gt;Tapes semidecussata&lt;/i&gt; with a manipulated yeast product as a partial substitute for algae
Provedor de dados: Open Marine Archive
Autores: Albentosa, M.; Naessens, E.; Léger, P.; Coutteau, P.; Lavens, P.; Sorgeloos, P.
The results are presented of preliminary trials conducted with &lt;i&gt;Tapes semiducussata&lt;/i&gt; spat using manipulated yeast products as substitutes for unicellular algae in their diets. Findings showed that spat growth increased with increasing amounts of algae in the artificial diet; growth was very poor when no algae were offered at all. It is concluded that manipulated yeasts may replace a substantial part of the algae in clam diets, but complete replacement is not possible, yet.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial feeding; Clam culture; Diets; Nutritive value; Yeasts.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2801

Improved production of postlarval white shrimp through supplementation of L-ascorbyl-2-polyphosphate in their diet
Provedor de dados: Open Marine Archive
Autores: Kontara, E.K.M.; Merchie, G.; Lavens, P.; Robles, R.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P.
L-ascorbyl-2-polyphosphate (ApP) was used as a vitamin C source to study the ascorbic acid (AA) requirements for the early postlarval stages of white shrimp (&lt;i&gt;Penaeus vannamei&lt;/i&gt;). First the stability of ApP in the diets was determined: ApP losses after pelletizing and 10 min immersion in seawater were 25-35% and 30%, respectively. Semipurified diets with five levels of ApP (0, 20, 40, 100 and 200 mg kg&lt;sup&gt;-1&lt;/sup&gt; expressed as active AA were fed &lt;i&gt;ad libitum&lt;/i&gt; to &lt;i&gt;P. vannamei&lt;/i&gt; (PL-14 stage, mean dry weight 0.73 mg) for 26 days. Each treatment was run in five replicates. No significant differences in growth were observed among treatments after 26 days of feeding. As of day 19 of feeding, increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diets; Polyunsaturated fatty acids; Shrimp culture; Penaeus vannamei.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2959

Optimization of dietary vitamin C in fish and crustacean larvae: a review
Provedor de dados: Open Marine Archive
Autores: Merchie, G.; Lavens, P.; Sorgeloos, P.
HPLC techniques were adapted and standardized for quantification of ascorbic acid (AA) and its derivates in both diets and target organisms. To assess the dietary needs for AA at start of exogenous feeding, the AA content in the various live diets currently used in aquaculture (algae, rotifers, &lt;i&gt;Artemia&lt;/i&gt; ) was analyzed. Application of techniques for boosting vitamin C using ascorbyl palmitate as the source enabled the transfer of elevated levels (up to 2,500 µg AA/g DW) of bioactive vitamin C. Larvae of fish (&lt;i&gt;Clarias gariepinus, Dicentrarchus labrax, Scophthalmus maximus&lt;/i&gt;), white shrimp (&lt;i&gt;Penaeus vannamei&lt;/i&gt;) and prawn (&lt;i&gt;Macrobrachium rosenbergii&lt;/i&gt;) were enriched via the live food chain....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacean larvae; Diets; Vitamin C.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2962

The use of &lt;i&gt;Artemia&lt;/i&gt; in marine fish larviculture
Provedor de dados: Open Marine Archive
Autores: Sorgeloos, P.; Lavens, P.; Léger, Ph.; Tackaert, W.
Among the live diets used in the larviculture of fish and shellfish, the brine shrimp &lt;i&gt;Artemia&lt;/i&gt; nauplii constitute the most widely used food item; i.e., over 700 metric tons of dry &lt;i&gt;Artemia&lt;/i&gt; cysts are annually marketed worldwide for on-site hatching into 0.4 mm nauplii.Although the use of &lt;i&gt;Artemia&lt;/i&gt; appears to be simple, considerable progress has been made in the past decade in improving and increasing its value as a larval diet for marine fish larvae. The improvements include: identification of the most appropriate strains and batches; new techniques for cyst disinfection; decapsulation and hatching; and enrichment and cold storage of nauplii. Using particulate or emulsified products rich in highly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1993
URL: http://www.vliz.be/imisdocs/publications/135452.pdf

Larval foods
Provedor de dados: Open Marine Archive
Autores: Lavens, P.; Sorgeloos, P.; Dhert, P.; Devresse, B.
Larval ontogeny in fish is characterized by important anatomical and physiological phases with consequent changes in nutrient requirements. Depending on the size of the larva and the specialization of its digestive system at the initiation of exogenous feeding, live food remains an essential requirement for many marine and some freshwater fish species. This paper reviews the latest developments in the selection, production and/or use of the most commonly used live feeds in larviculture, i.e. micro-algae, rotifers, and brine shrimp.Species-specific dietary requirements are met by application of live food enrichment techniques with selected nutrients. It is very likely that broodstock nutrition and conditioning might influence the nutritional requirements of...
Tipo: Info:eu-repo/semantics/article
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2577

Marine aquaculture in Flanders
Provedor de dados: Open Marine Archive
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

Manipulated yeast diets as a partial algal substitute for rearing bivalve molluscs: laboratory trials with &lt;i&gt;Tapes semidecussata&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Coutteau, P.; Lavens, P.; Léger, P.; Sorgeloos, P.
The development of a cost-effective algal substitute would greatly reduce operating costs of bivalve hatcheries and has therefore been the subject of many studies. Previous work has resulted in the development of a yeast diet with improved digestibility and nutritional composition. Preliminary trials showed that this diet can substitute up to 80% of the algal diet in the seed culture of the Manila clam &lt;i&gt;Tapes semidecussata&lt;/i&gt;. In this communication we propose a culture test diet which will be used to study further dietary improvements of the yeast product.Juveniles of the Manila clam (1 to 5 mg unit weight) were batch cultured in a 51 recirculating system. Optimal daily ration for the algal control diet &lt;i&gt;Chaetoceros...
Tipo: Info:eu-repo/semantics/article
Ano: 1990
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2812

&lt;i&gt;cis&lt;/i&gt;-Canthaxanthins: unusual carotenoids in the eggs and the reproductive system of female brine shrimp &lt;i&gt;Artemia&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Nelis, H.J.C.F.; Lavens, P.; Moens, L.; Sorgeloos, P.; Jonckheere, J.A.; Criel, G.R.J.; De Leenheer, A.P.
The significance of carotenoid accumulation in crustacean eggs remains obscure, particularly because neither eggs nor female animals have been found to display specific pigment patterns in relation to reproduction. We report here the first example of carotenoids found exclusively in the ovaries, the eggs, and the hemolymph, but not in the carcass of a female, reproductively active crustacean, i.e. the brine shrimp &lt;i&gt;Artemia&lt;/i&gt; . These pigments are virtually absent in males and in immature animals and disappear very rapidly in growing nauplii following hatching of encysted embryos. Within the cysts, they are preferably localized in the yolk platelets. We have identified them as mono-&lt;i&gt;cis&lt;/i&gt;-canthaxanthins on the basis of their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal reproductive organs; Brine shrimp eggs; Carotenoids; Artemia.
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3269