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| Registros recuperados: 251 | |
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| 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 |
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| Vanhaecke, P.; Persoone, G.; Claus, C.; Sorgeloos, P.. |
| Although standardization of toxicity tests on aquatic organisms is an urgent necessity, very little has yet been achieved for the marine environment. As a first step in this direction, a simple, inexpensive and reliable short-term routine test with <i>Artemia</i> larvae is proposed. This test is the result of an extensive study in our laboratory, taking into account the advantages and disadvantages of <i>Artemia</i> bioassays published by various authors. The major advantage of the brine shrimp as a test species is its continuous availability under the form of dry cysts which can be hatched very easily; this eliminates all biological, technological, and financial problems of stock recruitment and/or culturing. The acute test... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nauplii; Toxicity tests; Artemia. |
| Ano: 1981 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3711 |
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| Sorgeloos, P.. |
| The first written record of the existence of the brine shrimp only dates back to 1755 (Schlosser in Kuenen and Baas-Becking, 1938). Nonetheless this "filtering animal" was already known since much longer times by different ethnic groups who attributed a better salt production in the brine pools to the presence of <i>Artemia</i> ; hence its popular names such as brineworm, Salztierchen, verme de sale, sóféreg, Bahar el dud, Fezzanwurm, etc. Despite the primitive optical equipment available at that time Schlosser's drawings were very detailed and rightly give the adult animal 11 pairs of thoracopods. Several other scientists, including Linnaeus (1758), later described adult <i>Artemia</i> with only 10 thoracopods. This controversy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia. |
| Ano: 1977 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3555 |
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| Dhert, Ph.; Sorgeloos, P.; Devresse, B.. |
| This paper reports on enrichment techniques oriented towards a specific DHA accumulation in the live prey <i>Brachionus plicatilis</i> and <i>Artemia sp.</i> The product used in these experiments (DHA7) is an experimental emulsion with a DHA/EPA ratio 6.7:1. Rotifers enriched with this pure DHA7 emulsion contained up to 69 mg/g DW DHA and a DHA/EPA ratio of 1.6. The DHA/EPA ration could be increased to a much higher level by different enrichment techniques. Dilution of the DHA7 emulsion with coconut oil prior to enrichment also had a beneficial effect on the DHA/EPA ratio of the rotifers. Using a mixture DHA7/coconut oil 3:7 the DHA/EPA ratio could be raised to 4.9. In <i>Artemia</i> DHA levels were slightly influenced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia; Brachionus plicatilis. |
| Ano: 1993 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2688 |
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| Vanhaecke, P.; Tackaert, W.; Sorgeloos, P.. |
| An updated list of more than 350 <i>Artemia</i> sites is provided. It includes geographical coordinates of the sites and available data on the mode of reproduction of the locally occurring brine shrimp.The geographical distribution of <i>Artemia</i> is related to different types of climate. The classification of climate according to Thornthwaite provides a good correlation with the geographical occurrence of <i>Artemia</i> , as a result of which the world distribution pattern of <i>Artemia</i> can be predicted. Moreover, areas with possible <i>Artemia</i> sites and areas suited for transplantation and/or inoculation with <i>Artemia</i> can be identified on the basis of water balance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogeography; Artemia. |
| Ano: 1987 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3215 |
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| Rombaut, G.; Dhert, P.; Vandenberghe, J.; Verschuere, L.; Sorgeloos, P.; Verstraete, W.. |
| The effect of bacterial strains on the growth rate of rotifers, Brachionus plicatilis, was determined under monoxenic conditions. The first objective was to obtain sterile rotifer cultures starting from rotifer resting eggs using merthiolate or glutaraldehyde as disinfectant. Sterile rotifer cultures were obtained, without affecting the hatching ability of the resting eggs, when 0.05 µl/l glutaraldehyde was used. This disinfection procedure was used to examine the effect of 20 bacterial strains, isolated from well-performing live-feed production systems, on the population growth rate of rotifers cultured under monoxenic conditions. Five out of the 20 bacterial strains tested were able to improve significantly the asexual reproduction of rotifers. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Aquaculture techniques; Bacterial diseases; Disease transmission; Disinfection; Hatching; Zooplankton; Zooplankton culture; Brachionus plicatilis; Rotifera. |
| Ano: 1999 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4030 |
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| Triantaphyllidis, G.V.; Abatzopoulos, T.J.; Miasa, E.; Sorgeloos, P.. |
| Two parthenogenetic <i>Artemia</i> populations from southern Africa, one from Swakopmund (Namibia) and another from Ankiembe saltworks (Madagascar) have been studied. The population of Namibia is mainly diploid (2n=42) with few tetraploid individuals (4n=84), while the one from Madagascar was found to be triploid (3n=63). No chromocenters have been observed in either of the two populations. The Namibian population has smaller cysts and nauplii compared to those of the Madagascar population. Discriminant analysis revealed significant differences in the biometry of the adults from the two populations. The two populations exhibited very good hatching characteristics. The study of fatty acid methyl esters revealed that the Namibian population... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1996 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3110 |
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| Verschuere, L.; Rombaut, G.; Huys, G.; Dhont, J.; Sorgeloos, P.; Verstraete, W.. |
| The use of juvenile <i>Artemia</i> as feed in aquaculture and in the pet shop industry has been getting more attention during the last decade. In this study, the use of selected bacterial strains to improve the nutritional value of dry food for <i>Artemia</i> juveniles and to obtain control of the associated microbial community was examined. Nine bacterial strains were selected based on their positive effects on survival and/or growth of <i>Artemia</i> juveniles under monoxenic culture conditions, while other strains caused no significant effect, significantly lower rates of survival and/or growth, or even total mortality of the <i>Artemia</i> . The nine selected strains were used to preemptively colonize the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Biological control; Brine shrimp culture; Chemotaxonomy; Colonization; Feeds; Interspecific relationships; Nutrition; Polyculture; Survival; Artemia. |
| Ano: 1999 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4039 |
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| Vanhaecke, P.; Siddall, S.E.; Sorgeloos, P.. |
| The brine shrimp inhabits geographically isolated biotopes with specific biotic and abiotic conditions. This has resulted in various geographical strains between which marked genetica, biological and chemical differentiation exists. The response of 13 different <i>Artemia</i> strains to the combined effect of temperature and salinity has been studied. Experimental temperatures tested ranged from 18 to 34°C and salinities from 5 to 120 promille. Except for Chaplin Lake (Canada) <i>Artemia</i> , all strains showed high survival over a wide range of salinities (35-110 promille). For all strains the common temperature optimum was between 20 and 25°C. Interaction between temperature and salinity was negligible or very limited.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salinity effects; Survival; Temperature effects; Artemia. |
| Ano: 1984 |
URL: http://www.vliz.be/imisdocs/publications/261924.pdf |
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| 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 <i>Artemia</i> . In general, decapsulated cysts contain 30 to 40% more energy than freshly hatched nauplii; for Chaplin Lake and Buenos Aires <i>Artemia</i> 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 |
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| Gajardo, G.; Colihueque, N.; Parraguez, M.; Sorgeloos, P.. |
| Six <i>Artemia</i> populations from coastal and inland sites in Chile, ranging from 20 to 50 degrees latitude south, were compared morphologically. The study included reference samples of <i>A. franciscana</i> (San Fransisco Bay, California-USA) and <i>A. persimilis</i> (Buenos Aires, Argentina). These species are likely to be found in Chile. Samples from Peru (Piura) and Brazil (Macau, Rio Grande do Norte) are two known examples of deliberate introduction of <i>A. franciscana</i>. The hypothesis of <i>A. franciscana</i> being the dominant species in South America was tested by multivariate morphological analyses based on ten body measurements. In addition, laboratory cross-fertility tests were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia. |
| Ano: 1998 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=302 |
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| Tzovenis, I.; De Pauw, N.; Sorgeloos, P.. |
| The culture of <i>Isochrysis</i> aff. <i>galbana</i> Green (T-ISO) in hatcheries is promoted for its high docosahexaenoic acid (DHA) content which favours the successful rearing of aquatic larvae. In this paper we identified the need for well-defined culture conditions of microalgae if sufficient DHA content is the final goal. Using photoperiods of 24:0h, 12:12h and 16:8h L/D combined with photon flux densities (PFD's) of 110, 220 and 460 µE m<sup>-2</sup> s<sup>-1</sup>, batch cultures of T-ISO were sampled for DHA content in the exponential as well as the post-exponential (light-limited) growth phase. The various light regimes resulted in differences of DHA content of T-ISO revealing influences and strong... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhodomonas salina. |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2979 |
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| Romdhane, M.S.; Devresse, B.; Léger, Ph.; Sorgeloos, P.. |
| Larvae of the freshwater prawn (<i>Macrobrachium rosenbergii</i>) were reared to post-larvae in a closed recirculation system. Six treatments were designed where freshly-hatched <i>Artemia</i> nauplii were first given to the larvae for 3, 7, 11, 15, 17 and 25 days according to the treatment. After that (omega-3) HUFA-enriched <i>Artemia</i> were given until the 28th day at which time the test was terminated and evaluated. The requirement for (omega-3) Highly Unsaturated Fatty Acids (HUFA) for the larval stages of <i>M. rosenbergii</i> was confirmed by this experiment. Moreover, the longer the period of feeding on (omega-3) HUFA-enriched <i>Artemia</i> nauplii , the better the results in terms of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia. |
| Ano: 1995 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2600 |
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| Merchie, G.; Lavens, P.; Verreth, J.; Ollevier, F.P.; Nelis, H.; De Leenheer, A.P.; Storch, V.; Sorgeloos, P.. |
| The effect of three dietary ascorbic acid (AA) concentrations, each applied via two feed types, on production characteristics and physiological condition of African catfish (<i>Clarius gariepinus</i>) larvae has been assessed in two 10-day culture trials. Three treatments received only <i>Artemia</i> nauplii enriched with an experimental emulsion containing 0, 10 or 20% ascorbyl palmitate (AP) and yielding 530, 1200 and 1600 µg AA g<sup>-1</sup> DW <i>Artemia</i> , respectively; the other three treatments were fed the same <i>Artemia</i> diets which were partially substituted by an artificial diet containing no vitamin C (ratio 20:80). No differences in survival could be observed: however, from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish larvae; Food organisms; Vitamin C; Clarias gariepinus. |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2963 |
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| Registros recuperados: 251 | |
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