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Verspreidingspatronen en bedreigingen van de arthropodenfauna van het Schelde-estuarium OMA
Hendrickx, F.; Desender, K.; Maelfait, J.-P..
Tipo: Info:eu-repo/semantics/article
Ano: 2001 URL: http://www.vliz.be/imisdocs/publications/280701.pdf
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Morphodynamics and sediment dynamics in the Southern Bight, Belgium OMA
Lanckneus, J.; De Moor, G.; Vande Velde, L.; De Winne, E.; Sanchez Almazo, I.; Garrido Martín, T..
The Research Unit Marine and Coastal Geomorphology of the University of Ghent has been involved for 15 years in research projects dealing with the genesis, the present-day morphodynamics and sediment dynamics and the maintenance mechanisms of sandbanks. Such a research has, in addition to the scientific value, several applications in the field of offshore engineering, management of natural resources, coastal protection and environment policy, which are discussed in the present paper.
Tipo: Info:eu-repo/semantics/article
Ano: 1993 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2717
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Description of <i>Diplolaimella dievengatensis</i> sp. n. (Nematoda: Monhysteridae) OMA
Jacobs, L.; Van De Velde, M.; Geraert, E.; Vranken, G..
<i>Diplolaimella dievengatensis</i> sp. n. was sampled from the Dievengat, a thalassic water pond situated near Knokke in North Western Belgium. The different juvenile and adult stages are described in detail. The male of D. dievengatensis is characterised by the length of the spicules ( > 25 μm), the prominence of the gubernacular apophyses and the presence and position of five pairs of equal and prominent post-cloacal genital papillae. The female is characterised by the sclerotizations of the vaginal cuticle and the absence of a postvulval uterine sac.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal morphology Brackish water Taxonomy Diplolaimella dievengatensis Jacobs & Vrancken; 19 Nematoda [Nematodes].
Ano: 1990 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7189
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Sedimentologische kartering van mariene bodemsedimenten aan de hand van akoestische parameters OMA
De Maeyer, P..
Cartography of sea-floor sediments is troubled by the limited number of observation points. The new techniques that have come up and their use allow for calculation of acoustic parameters (speed and reflection coefficient) that can be correlated with sedimentological parameters.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acoustic properties; Cartography; Sediments.
Ano: 1981 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3706
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Technological improvements for the cultivation of invertebrates as food for fishes and crustaceans: 2. Hatching and culturing of the brine shrimp, <i>Artemia salina</i> L. OMA
Sorgeloos, P.; Persoone, G..
Although extensive fundamental research has been performed on the brine shrimp, the yields from hatching and culturing this organism which is widely used in mariculture, can be greatly improved. By exposing the immersed cysts to light and by using a new type of hatching cylinder and separator box, greater hatching and separation efficiencies can be obtained. Controlled mass culture of brine shrimp larvae to the adult stage has been extremely difficult until now; the literature on the subject is reviewed and a new technique of high density culturing at the pilot-stage is described.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia salina.
Ano: 1975 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3511
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A time-dependent flow model for heavy metals in the Scheldt estuary OMA
De Smedt, F.; Vuksanovic, V.; Van Meerbeeck, S.; Reyns, D..
The main processes that determine the behaviour of heavy metals in the Scheldt estuary are tidal hydrodynamics, sediment transport, and sorption of heavy metals on suspended matter. The water quality model WASP is applied to simulate the spatial distribution of five heavy metals in the estuary, under average hydrodynamic and suspended sediment transport regimes. First, the hydrodynamical part of the model is constructed and the results are verified by comparison with measured water levels and flow velocities. Secondly, a salt transport model is set up in order to evaluate the hydrodynamical dispersive mixing characteristics. Thirdly, a suspended sediment transport model is constructed and finally a transport model for heavy metals. The simulated...
Tipo: Info:eu-repo/semantics/article
Ano: 1998 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7065
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A study of pigments in some developmental stages of <i>Aurelia aurita</i> Lam OMA
Van den Branden, C.; Van den Sande, P.; Decleir, W..
Unfed polyps of <i>Aurelia aurita</i> are white. Fed with <i><i>Artemia</i> salina</i> nauplii they turn to pinkish because of the canthaxanthin present in the food. The deep brown-red colour of strobila and ephyra is due to melanin.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Developmental stages; Pigments; Polyps; Aurelia aurita.
Ano: 1980 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3702
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Sedimentation model of Eocene continental shelf deposits offshore the Belgian coast OMA
Jacobs, P.; Sevens, E..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Continental shelves Eocene ANE; Belgium; Belgian Coast.
Ano: 1994 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2619
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Observations sur l'éclosion de larves d'huîtres dans le bassin de chasse d'Ostende OMA
Polk, P..
Tipo: Info:eu-repo/semantics/book Palavras-chave: Larval settlement Oyster culture Ostrea edulis Linnaeus; 1758 ANE; Belgium; Oostende; Sluice Dock.
Ano: 1965 URL: http://www.vliz.be/imisdocs/publications/131225.pdf
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Sur <i>Polysiphonia banyulensis</i> nov. sp. (Ceramiales, Rhodophyceae) OMA
Coppejans, E..
<i>Polysiphonia banyulensis</i> nov. sp. (section <i>Oligosiphonia</i>) is a species with four pericentral cells, without any cortication. The isolated erect thalii have pseudodichotomous ramifications that are markedly narrower at their base: they originate in the axils of trichoblasts. These are very large and are characterized by the very large sub-basal cell. The phyllotaxis of the trichoblasts is 1/4 but the number of segments that occur between two trichoblasts is variable. The tetraspores occur isolated or in two contiguous segments in the upper half of the thallus. The male and female gametophytes are still unknown. Collected at Banyuls-sur-Mer, Pyrénées-Orientales, France in July 1974.
Tipo: Info:eu-repo/semantics/article
Ano: 1975 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3541
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Calculations of results in grazing experiments using the counting method OMA
Tackx, M.L.M.; Van de Vrie, E.M..
Different formulae used in the literature for calculation of ingestion rates are reviewed. Their applicability is discussed in relation to two criteria: the occurrence of saturation of the feeding and/or growth of the food particles. It is shown by simulations that the differences in results obtained by calculating ingestion following a linear or an exponential model are restricted to a few percent. Calculation of ingestion rates by substantial over- or underestimation depending on the growth constant of the food particles and the grazing time.The formula I = Vk(C<sub>zt</sub>C<sub>zo</sub>e<sup>kt</sup>)/N(I-e<sup>kt</sup>) is proposed for the calculation of ingestion rates under saturated circumstances.It...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Food intake; Food intake; Grazing; Ingestion; Mathematical analysis; Measuring devices; Phytoplankton; Zooplankton.
Ano: 1985 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3212
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Drug assimilation in the tissue of European sea bass (<i>Dicentrarchus labrax</i>) fry delivered orally through bioencapsulation OMA
Gapasin, R.S.J.; Nelis, H.; Chair, M.; Sorgeloos, P..
Assimilation levels of the antibacterials trimethoprim (TMP) and sulfamethoxazole (SMX) in sea bass (<i>Dicentrarchus labrax</i>) fry tissue administered orally were investigated. A 1:5 TMP and SMX combination incorporated in oil emulsion (Selco) at 20% and 40% concentrations (w/w) were bioencapsulated in <i>Artemia</i> (Instar II) nauplii. Chemotherapeutics-loaded ('medicated') nauplii were fed to the sea bass fry and drug concentration in the tissue were analysed by high-performance liquid chromatography (HPLC). Fish fed 40% 'medicated' <i>Artemia</i> assimilated significantly higher levels of chemotherapeutics compared with those fed 20% 'medicated' <i>Artemia</i> . Chemotherapeutics given at 40% reached...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dicentrarchus labrax (Linnaeus; 1758) [Bass].
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2964
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The new geological map of Northwestern Flanders, Southern Bight North Sea: techniques and methodology OMA
Jacobs, P.; De Ceukelaire, M..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Geological maps Methodology ANE; North Sea; Southern Bight.
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2991
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A new thalassocypridine genus (Crusacea, Ostracoda) from brackish waters in the Indian and Pacific Oceans, with the description of a new species OMA
Wouters, K..
<i>Mangalocypria</i>, a new genus of the tribe Thalassocypridini, is described, with a new species, and two previously described species, from Papua New Guinea, the Comoros and Indonesia. The new genus has a remarkable set of characters separating it from other members in the tribe: thin-shelled, translucent and smooth valves, V-process of lower lip developed as a rake, and postero- distal claw of furca fixed to shaft without a joint. The affinities of <i>Mangalocypria</i> gen. nov. with other genera is discussed, and some taxonomical problems in the tribe Thalassocypridini are commented upon. The diagnostic value of incompletely differentiated Zenker organs of premature males is discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal morphology New genera New species Taxonomy Mangalocypria Ostracoda ISEW; Indonesia ISEW; Papua New Guinea ISW; Comoro I..
Ano: 1998 URL: http://www.vliz.be/imisdocs/publications/303554.pdf
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Effects of hydrogen peroxide treatment in <i>Artemia</i> cysts of different geographical origin OMA
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 <i>Artemia</i> 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
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Waterboatmen, and testing for Lotka-Volterra-type interactions OMA
Bergmans, M..
A previous paper by Istock, in which this author claims to have successfully applied the Lotka-Volterra model to his observations on corixid population dynamics, is criticised for the shortcomings in evidence cited to support the model's fit with the data. It is contended that the dynamic behaviour of the system of Hesperocorixa lobata - Sigara macropala interaction is not in accordance with the Lotka-Volterra model. ThIs brief critique is followed by comments by istock in reply to the points raised in Bergmans' letter.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Models; Population dynamics; Corixidae.
Ano: 1979 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3600
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Improvements in the decapsulation technique of <i>Artemia</i> cysts OMA
Bruggeman, E.; Sorgeloos, P.; Vanhaecke, P..
Because bleaching powder is the cheapest source of hypochlorite in many countries of the world, a decapsulation procedure has been worked out in which technical calciumhypochlorite Ca(OCl)<sub>2</sub> is utilized.A standard procedure has been developed for the deactivation of the chlorine residues adsorbed on the decapsulated cysts. Proper dehydration and storage of the decapsulated cysts assure maximum viability of the embryos in diapause. A prototype system for routine decapsulation and processing of large quantities of cysts is proposed.Beneficial effects of the decapsulation process on both the hatching percentage and the individual dry weight of the hatched nauplii are discussed in detail.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia.
Ano: 1980 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3611
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Microplankton de la Mer Flamande: 3. Les Péridiniens OMA
Meunier, A..
Tipo: Info:eu-repo/semantics/book Palavras-chave: Holocene Nannoplankton Picoplankton Dinoflagellata Peridiniaceae ANE; Belgium.
Ano: 1919 URL: http://www.vliz.be/imisdocs/publications/249021.pdf
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Belgium extends its territorial sea up to 12 nautical miles OMA
Franckx, E..
Tipo: Info:eu-repo/semantics/article
Ano: 1987 URL: http://www.vliz.be/imisdocs/publications/277142.pdf
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Redescription and morphological variability of <i>Darwinula stevensoni</i> (Brady & Robertson, 1870) (Crustacea, Ostracoda) OMA
Rossetti, G.; Martens, K..
The species <i>Darwinula stevensoni</i> is extensively redescribed. Morphological variability of both valves and soft parts is assessed in several geographical and climatically distant populations and is found to be minimal or non-existant. Only size significantly varies between populations and this can be attributed to the differences in ambient temperatures during the larval development. Number and shape of muscle scars also vary, but this both within and between populations. Valve shape and chaetotaxy of limbs are remarkably constant. One female from an Italian population has aberrant Mx2-palps, but this specimen is considered a teratological case. Earlier records of males of <i>D. stevensoni</i> and the taxonomic position of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal morphology; Taxonomy; Darwinula stevensoni; Ostracoda.
Ano: 1996 URL: http://www.vliz.be/imisdocs/publications/303568.pdf
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