Consulta: creatorFacets:"Persoone, G."
Registros recuperados: 50
Data/hora: 07/06/2024 06:24:52

The use of the brine shrimp (Artemia salina) in aquaculture
Provedor de dados: 5
Autores: Sorgeloost, P.; Baeza-mesa, M.; Benijts, F.; Bossuyt, E.; Bruggeman, E.; Claus, C.; Persoone, G.; Van De Putte, G.; Versichele, D.
In view of the need'for research on the practical use of the brine shrimp Artemia salina in aquaaulture, our research team at the State University of Ghent (Belgium) is studying the following aspects : 1- The automatized mass-culturing of larvae. 2- The controlled production of cysts. 3- The comparative study of geographical strains. 4- The study of the metabolism of the cysts.
Tipo: Text
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00305/41626/40835.pdf

&lt;i&gt;Artemia&lt;/i&gt; in aquatic toxicology: a review
Provedor de dados: 27
Autores: Persoone, G.; Wells, P.G.
Due to commercial availability of dried cysts from which live test material can be hatched at will, &lt;i&gt;Artemia&lt;/i&gt; is used extensively in research and applied toxicology.Despite the extensive literature on dose-effect relationships of chemicals on brine shrimp, it was not until 1980 that an experimental protocol was developed for a simple acute toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii, meeting the prerequisites for standardization.The reliability and accuracy of this short-term test were determined during an intercalibration exercise involving 80 laboratories and were found to be quite satisfactory. Consequently, the so-called ARC-test, which is one of the very few standardized marine toxicity tests, is now used routinely at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1987
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3200

Contributions à l'étude des bactéries marines du littoral belge: IV. Recherche quantitative de la richesse microbienne de l'eau du bassin de chasse d'Ostende par lecture directe sur membranes filtrantes
Provedor de dados: 27
Autores: Persoone, G.; De Pauw, N.
In a series of bi-mensual samplings in 1966, the method of direct counting on membrane filters has been used to determine the quantity of bacteria present in the water of the Sluice-dock in Ostend (Belgium) as a possible important food-stock for oysters which are reared there.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria Community composition Filters Membranes Oyster culture Quantitative distribution Shallow water ANE; Belgium; Belgian Coast ANE; Belgium; Oostende; Sluice Dock.
Ano: 1968
URL: http://www.vliz.be/imisdocs/publications/294746.pdf

The influence of temperature and salinity on the sensitivity of &lt;i&gt;Artemia&lt;/i&gt; nauplii to chemical compounds
Provedor de dados: 27
Autores: Persoone, G.; Van Steertegem, M.
The toxicity of chemicals to aquatic organisms is mostly determined in a set of experimental conditions which are close to optimal for the test species. Because in nature organisms have to cope with fluctuating environmental conditions which can range during the course of the year from optimal to suboptimal, up to the limits of the tolerance range, the conditions under which routine bioassays are normally performed do, however, not reflect the large range of situations occurring in the field. Considering the scarcity of information on the effect of fluctuating environmental conditions on the sensitivity of test species to toxicants, a comparative laboratory study has been undertaken to determine the combined influence of environmental variables on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia.
Ano: 1987
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3746

Technological improvements for the cultivation of invertebrates as food for fishes and crustaceans: 1. Devices and methods
Provedor de dados: 27
Autores: Persoone, G.; Sorgeloos, P.
Technological problems can be considered as one of the bottlenecks of research concerned with culturing aquatic invertebrates in the laboratory, as well as the pilot and mass production stages. Oxygenation problems, circulation of the food and sedimentation problems can easily be solved by adapting the shape of the culturing vessels, i. e., by using funnel-shaped bottoms or high, narrow cylinders. In both cases, the food particles, settled on a very small bottle area, can easily be blown back into suspension using an air pump, which re-aerates the medium at the same time. A number of culturing devices for different categories of organisms, including algae are described and commented on. The only power source involved is compressed air which aerates, keeps...
Tipo: Info:eu-repo/semantics/article
Ano: 1975
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3510

The influence of the formulation of the herbicide paraquat on its toxicity for aquatic organisms
Provedor de dados: 27
Autores: Benijts-Claus, C.; Persoone, G.
Short term bio-assays have been carried out on representatives of different trophic levels of the aquatic food chain. The two wetters, which are included in the commercial formulation "Gramoxone" are very harmful for fish and their combination to paraquat increases the toxicity of the herbicide. Algae and crustaceans on the contrary, are more affected by the herbicide than by the wetters, the toxicity to the latter two groups being much higher than to fish.
Tipo: Info:eu-repo/semantics/article
Ano: 1975
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3525

Research on the culturing of the brine shrimp &lt;i&gt;Artemia salina&lt;/i&gt; L. at the State University of Ghent (Belgium)
Provedor de dados: 27
Autores: Sorgeloos, P.; Baeza-Mesa, M.; Benijts, F.; Persoone, G.
In the framework of research on mariculture at the "Institute for Marine Scientific Research" (IZWO), the "Laboratory for Biological Research in Environmental Pollution" at the State University of Ghent, is focusing on culturing problems of the brine shrimp &lt;i&gt;Artemia salina&lt;/i&gt;.  The following research topics are discussed: 1. The mechanisms leading to the hatching of &lt;i&gt;Artemia&lt;/i&gt; cysts are reviewed and complemented with new data on the sensitivity to light and temperature, and on the reversibility of the development within the cyst. The possible influences of the collecting, sorting, and packaging processes on the quality of the cysts are discussed. 2. Since in the literature much confusion exists concerning the mechanisms...
Tipo: Info:eu-repo/semantics/article
Ano: 1976
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3533

Determination of the toxicity of four heavy metal compounds and three carcinogens using two marine nematode species, &lt;i&gt;Monhystera microphthalma&lt;/i&gt; and &lt;i&gt;Diplolaimelloides bruciei&lt;/i&gt;
Provedor de dados: 27
Autores: Bogaert, T.; Samoiloff, M.R.; Persoone, G.
Bioassays with two marine nematode species were used to determine the toxicity of four heavy metal compounds and three carcinogens. The test using the marine species &lt;i&gt;Diplolaimelloides bruciei&lt;/i&gt; is more sensitive than the existing nematode test using the freshwater nematode &lt;i&gt;Panagrellus redivivus&lt;/i&gt; for mercury chloride and 2-acetamidofluorene, but less sensitive for methylmercury chloride, phenacetin, and 4-aminobiphenyl. The &lt;i&gt;Monhystera microphthalma&lt;/i&gt; test is less sensitive than the nematode test with &lt;i&gt;P. revivus&lt;/i&gt; for mercury chloride, selenium oxide, and cesium chloride. The range between the concentrations at which no toxic effects are observed and the concentrations at which 100%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcinogens Heavy metals Toxicity Diplolaimelloides bruciei Monhystera microphtalma de Man; 1880 Nematoda [Nematodes].
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3262

Technological improvements for the cultivation of invertebrates as food for fishes and crustaceans: 2. Hatching and culturing of the brine shrimp, &lt;i&gt;Artemia salina&lt;/i&gt; L.
Provedor de dados: 27
Autores: 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

Mass culture of microalgae in aquaculture systems: progress and constraints
Provedor de dados: 27
Autores: De Pauw, N.; Morales, J.; Persoone, G.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Algal culture; Aquaculture; Cultivation; Cultivation; Cultivation.
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3263

A simple volumeter for small invertebrates
Provedor de dados: 27
Autores: Persoone, G.
The displacement technique for measuring the volume of plankton catches is well established, and a number of papers have been published describing suitable apparatus for this purpose including those by Frolander (1957), and Yentsch &amp; Hebard (1957). Gnanamuthu (1952) reviews several papers dealing with equipment for measuring the volume of small aquatic animals and discusses his own volumeter. The apparatus here described employs a water column and is, therefore, more convenient to handle than previous designs which used a mercury column. It is inexpensive and simple to construct, and will measure to 0.01 or even 0.005 ccm. We have found it most useful in quickly measuring the volume of polychaetes or oligochaetes, small bivalves, small crustaceans, etc.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Instruments; Marine invertebrates.
Ano: 1971
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3430

The ARC-test: a standardized short-term routine toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii: methodology and evaluation
Provedor de dados: 27
Autores: Vanhaecke, P.; Persoone, G.
Considering the need for reliable standardized routine toxicity tests for the marine environment, a short-term bioassay with &lt;i&gt;Artemia&lt;/i&gt; nauplii has been developed for routine testing. The major reason for the selection of brine shrimp as test species is the continuous availability of &lt;i&gt;Artemia&lt;/i&gt; under the form of dry cysts from which the larvae are hatched very easily. This unique advantage solves one of the major problems of aquatic ecotoxicological tests, namely stock recruitment and/or culturing; the &lt;i&gt;Artemia&lt;/i&gt; test can be performed anywhere and at any time from dry biological material available "on the shelf".An extensive study has been performed on various brine shrimp tests published in scientific...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Methodology; Nauplii; Toxicity tests; Artemia.
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3275

Assessment of ammonia toxicity in contaminated sediments in the upper Scheldt (Belgium): the development and application of toxicity identification evaluation procedures
Provedor de dados: 27
Autores: Van Sprang, P.; Janssen, C.R.; Sabayasachi, M.; Benijts, F.; Persoone, G.
The toxicity of sediment pore waters from 4 sites in the Upper Scheldt war characterized using modified Toxicity Identification Evaluation (TIE) procedures The samples from all locations exhibited acute toxicity to the freshwater crustacean Thamnocephalus platyurus. The IIE approach was conducted using an enlarged battery of fractionation tests. Toxicity was removed or reduced significantly by the cation exchange resins and the air-stripping test at pH 11. Additionally, increased toxicity war observed at higher pH while a reduced toxicity war found at a decreased pH. From these TIE studies, ammonia war identified as the dominant toxic agent.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metals; River; Toxicants; Water.
Ano: 1996
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7459

New type of turbidostat with intermittent determination of cell density outside the culture vessel
Provedor de dados: 27
Autores: Sorgeloos, P.; Van Outryve, E.; Persoone, G.; Cattoir-Reynaerts, A.
An inexpensive turbidostat featuring intermittent determination of optical density in an interchangeable measuring tube and incorporating electronic circuits for the automated mechanics is described.
Tipo: Info:eu-repo/semantics/article
Ano: 1976
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3529

The use of &lt;i&gt;Artemia&lt;/i&gt; nauplii for toxicity test: a critical analysis
Provedor de dados: 27
Autores: Sorgeloos, P.; Remiche-Van der Wielen, C.; Persoone, G.
Because of their easy hatching from dry cysts and their year-round availability, nauplii of the brine shrimp &lt;i&gt;&lt;i&gt;Artemia&lt;/i&gt; salina&lt;/i&gt; are most convenient test organisms for toxicity studies. The bioassays mentioned in literature have, however, mostly been carried out with larvae of which neither the exact instar stage nor the geographical origin is known. The incubation of the cysts should always be carried out under strictly controlled temperature conditions since both the onset of hatching and the length of the hatching period are temperature-dependent. Moreover, the experiments should only be carried out with populations of nauplii of the same stage of development since it is demonstrated that the second and third instars are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nauplii; Toxicity tests; Artemia.
Ano: 1978
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3588

Protozoa as test organisms in marine ecotoxicology: luxury or necessity?
Provedor de dados: 27
Autores: Dive, D.; Persoone, G.
A critical examination of the utility of protozoan bioassays in marine as well as in freshwater ecotoxicology implies the answer to three basic questions: why, how and when. Arguments in favor of tests with Protozoa are: protozoans combine all biological mechanisms and functions in one single cell; the physiology and biochemistry of several species has been studied extensively; the generation time of Protozoa is very short in comparison to Metazoa; large numbers of organisms can be produced in a small volume; induction of cryptobiotic stages is possible with some species; Protozoa play a significant role in aquatic ecosystems; test methodologies with very sensitive criteria can be worked out. The two basic approaches for bioassay are &lt;i&gt;in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecotoxicology; Test organisms; Protozoa.
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3264

Three simple culture devices for aquatic invertebrates and fish larvae with continuous recirculation of the medium
Provedor de dados: 27
Autores: Sorgeloos, P.; Persoone, G.
The 3 culturing devices described are based on the principle of the classic air-water lift, which facilitates continuous recirculation and aeration of the cultivation medium. The first device is a "circulation cylinder", convenient for hatching eggs of the brine shrimp &lt;i&gt;Artemia salina&lt;/i&gt; and for culturing algae and protozoans. In the second device, an internal basket (i.e., a glass cylinder with plankton-gauze bottom) prevents the animals being carried along in the air-water lift. The third device, analogous to the second, is provided with a lateral waste-drain and a water collector with siphon, which empties regularly into the main culture vessel. The second and third devices proved to be excellent for the cultivation of a variety of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Fish larvae; Instruments; Marine invertebrates.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3461

Ecotoxicological testing for the marine environment: report on an international Symposium held in Belgium in 1983
Provedor de dados: 27
Autores: Persoone, G.; Jaspers, E.; Claus, C.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecotoxicology; Marine environment; Toxicity tests.
Ano: 1986
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3224

La pollution dans le port d'Ostende et ses répercussions sur la réproduction de l'huître plate dans le Bassin de Chasse = La pollution dans le port d'Ostende et ses répercussions sur la réproduction de l'huître plate dans le Bassin de Chasse
Provedor de dados: 27
Autores: Persoone, G.
The oyster culture, flourishing along the Belgian coast at the beginning of the century, perished entirely in the course of two World Wars. In 1956, it was taken on again intensively in the Scour Basin of Ostend. If we consider the obtained results with the affination of Flat and Portuguese oyster, this 86 ha closed basin, is of an exceptional productivity. Essays on the understanding of the origin of calcified oysters, done from 1960 until 1966, turned out to be very promising and an integral oyster culture from the larvae up to the adult oyster could be observed. In any case the last few years, eventhough compared to before a normal emission of larvae of &lt;i&gt;Ostrea edulis&lt;/i&gt;, there has not been a fixation of the origin. Regular samples of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brackishwater pollution Harbours Oyster culture Reproduction Ostrea edulis Linnaeus; 1758 ANE; Belgium; Oostende Harbour; Sluice Dock.
Ano: 1971
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3467

General aspects of the ecology and biogeography of &lt;i&gt;Artemia&lt;/i&gt;
Provedor de dados: 27
Autores: Persoone, G.; Sorgeloos, P.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Autecology; Biogeography; Artemia.
Ano: 1980
URL: http://www.vliz.be/imisdocs/publications/260376.pdf

De pollutie van de haven van Oostende en haar gevolgen op de reproductie van de platte oester (Ostrea edulis L.) in de Spuikom (extended abstract)
Provedor de dados: 27
Autores: Persoone, G.
Tipo: Info:eu-repo/semantics/article
Ano: 1971
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7918

Influence de quelques facteurs écologiques sur la vitesse de reproduction du cilié hypotriche &lt;i&gt;Euplotes vannus&lt;/i&gt; Muller
Provedor de dados: 27
Autores: Persoone, G.; Deplaecie, M.
During ecological investigations on the optimum culturing conditions of ciliates, we studied the influence of a number of abiotic factors on the reproductive potential of the hypotrichous ciliate &lt;i&gt;Euplotes vannus&lt;/i&gt; Muller, such as the nature and the quantity of food, the temperature and the salinity. The experiments were run in petri dishes of 5 cm diameter containing 5 ml of food suspension, and were always started with conjugants. The microphagous &lt;i&gt;Euplotes vannus&lt;/i&gt; thrives on a variety of food media. Excellent results were observed on homogenized bakers yeast, i.e. 10.000-20.000 animals in 5 ml of food suspension. In good culturing conditions the stationary phase was reached in 7 days, which implicates a mean rate of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproduction Euplotes vannus ANE; Belgium; Oostende Harbour.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3468

Decapsulation of &lt;i&gt;Artemia&lt;/i&gt; cysts: a simple technique for the improvement of the use of brine shrimp in aquaculture
Provedor de dados: 27
Autores: Sorgeloos, P.; Bossuyt, E.; Laviña, E.; Baeza-Mesa, M.; Persoone, G.
Although it is a common practice in different disciplines of fundamental research on the brine shrimp, and despite the very interesting applications that it offers for the use of &lt;i&gt;Artemia&lt;/i&gt; in aquaculture, the "decapsulation" technique, which removes the outer layer of the cyst shell of &lt;i&gt;Artemia&lt;/i&gt; , is not known to shrimp and fish aquaculturists. The present paper describes the technology developed by the authors for the routine decapsulation of &lt;i&gt;Artemia&lt;/i&gt; cysts. The advantage which result from the use of decapsulated cysts in aquacultural hatcheries are discussed.
Tipo: Info:eu-repo/semantics/article
Ano: 1977
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3572

The flow-through column: a simple and multipurpose rearing device
Provedor de dados: 27
Autores: Mertens, J.; Persoone, G.
A simple flow-through system for culturing or colonization purpose is described. It consists of piled up petri-dishes placed on top of a water reservoir with an air-water lifting tube. Each of the seperately removable units is composed of the bottom of a petri-dish glued on top of the lid of another one. A short piece of plastic tubing, fitting tightly into an exentrically drilled hole in the bottom part of the unit, permits a continuous flow of water through the whole column.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Experimental rearing; Instruments.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3454

La toxicité de trois herbicides sur l'écosystème aquatique
Provedor de dados: 27
Autores: Benijts-Claus, C.; Persoone, G.
Tipo: Info:eu-repo/semantics/article
Ano: 1975
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3516

Report on an intercalibration exercise on a short-term standard toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii (ARC-test)
Provedor de dados: 27
Autores: Vanhaecke, P.; Persoone, G.
Considering the necessity for standardization of toxicity tests and the need for simple and reliable routine tests, the &lt;i&gt;Artemia&lt;/i&gt; Reference Center at the State University of Ghent in Belgium has developed a short term standard toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii. This simple and inexpensive bioassay which can be used as a screening test to determine the toxicity of chemicals to aquatic organisms, has been discussed in detail during a special workshop devoted to toxicity tests with brine shrimp, at the occasion of the "International Symposium on the brine shrimp &lt;i&gt;&lt;i&gt;Artemia&lt;/i&gt; salina&lt;/i&gt;"(Corpus Christi, Texas, USA; August 1979). Besides a few minor modifications, the test methodology was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intercalibration; Nauplii; Toxicity tests; Artemia.
Ano: 1981
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3377

Nursery culturing of bivalve spat in heated seawater
Provedor de dados: 27
Autores: Claus, C.; Van Holderbeke, L.; Maeckelberghe, H.; Persoone, G.
The controlled nursery culturing of mollusc spat produced to date by millions in commercial hatcheries is an intermediate step in mollusc farming which is receiving more and more attention. Different technologies for nursery culturing indoors as well as outdoors have been developed at different places.The principles are always basically the same and consist of culturing postlarvae of a few millimeters to a size of a few centimeters in densities as high as possible in specific devices containing seawater which is eventually enriched with live unicellular algae or inert foods. This paper reports on the first results obtained in Belgium in an indoor experimental nursery with spat of &lt;i&gt;Ostrea edulis, Crassostrea gigas&lt;/i&gt; and &lt;i&gt;Venerupis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mollusc culture; Spat; Bivalvia.
Ano: 1981
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3402

A culture system for &lt;i&gt;Artemia, Daphnia&lt;/i&gt;, and other invertebrates, with continuous separation of the larvae
Provedor de dados: 27
Autores: Sorgeloos, P.; Persoone, G.
An easily constructed apparatus is described in which adult invertebrates can be reared with automatic feeding and with automatic and continuous separation of the offspring from the adults.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Culture media; Larvae.
Ano: 1973
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3471

Research on the development of a short term standard toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii
Provedor de dados: 27
Autores: Vanhaecke, P.; Persoone, G.; Claus, C.; Sorgeloos, P.
Standardization of toxicity tests on aquatic organisms to detect the impact of chemicals on freshwater or marine ecosystems is an urgent necessity. From the variety of methods, criteria, and test species proposed, simple standardized tests for algae, crustaceans, and fish are now close to being adopted at the international level for the freshwater environment. Despite the same urgency, very little has been achieved for the marine environment. &lt;i&gt;Artemia&lt;/i&gt; is an extremely suitable test-species since, contrary to all other organisms, it does not require continuous maintenance of stock cultures. Unfortunately none of the &lt;i&gt;Artemia&lt;/i&gt; toxicity tests that have been worked out so far can be adopted as such as a representative standard...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nauplii; Toxicity tests; Artemia.
Ano: 1980
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3698

Contributions à l'étude des bactéries marines du littoral belge: II. Comparaison de plusieurs méthodes pour détacher et obtenir en suspension les bactéries contaminant des surfaces
Provedor de dados: 27
Autores: Persoone, G.
Comparison of different methods to remove and to suspend bacteria which contaminate surfaces.The waterpressure and suction-rinsing method gave most satisfactory results as to the percentage of removed organisms and the number of them that we could bring into culture on agar-media.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria ANE; Belgium; Belgian Coast.
Ano: 1965
URL: http://www.vliz.be/imisdocs/publications/282301.pdf

An improved separator box for &lt;i&gt;Artemia&lt;/i&gt; nauplii and other phototactic invertebrates
Provedor de dados: 27
Autores: Persoone, G.; Sorgeloos, P.
1. A simple cylindrical hatching and separator box is described for &lt;i&gt;Artemia salina&lt;/i&gt;nauplii (and other phototactic invertebrates), in which the "corner seeking effect" responsible for poor separation is avoided, and from which nauplii can be recovered very conveniently. 2. Separation is achieved by partly unscrewing an internal and closed cylinder from its fixed counter-part glued to the bottom of the box, till two slits are freed through which the nauplii migrate from the darkened internal hatching cylinder into the illuminated exterior compartment. Rescrewing the former cylinder separates the larvae from debris and unhatched eggs.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hatching; Instruments; Nauplii; Phototaxis; Artemia.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3460

Standardization of aquatic bioassays: compromises between biological and economical criteria
Provedor de dados: 27
Autores: Persoone, G.
A variety of ecotoxicological methods have been worked out and are described in the scientific literature to experimentally predict the impact of chemical substances on aquatic terrestrial biota. Only during recent years have serious efforts been made at both the national and international level to select a few bioassays which should be standardized for general applicability. The choice for a standard bioassay, of the test species as well as of the criterion to assess the dose-effect relationship is a matter of the compromises which one is willing to make between the factors ecological representativeness and sensitivity on one hand, and mangeability in the laboratory and cost of the test on the other hand. This assertion is demonstrated for the aquatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioassays; Standardization.
Ano: 1980
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3686

Ecology of fouling on submerged surfaces in a polluted harbour
Provedor de dados: 27
Autores: Persoone, G.
Growth on submerged substrates (fouling or "Aufwuchs") has already been the object of numerous studies especially with regard to its economic implications.  The scarcity of investigations on the influence of pollution on development and evolution of the fouling-biocoenosis is surprising. As far as we know the smaller fauna and flora in this particular situation have never been studied quantitatively.  Therefore, in 1963, 1964 and 1965, a number of experiments were carried out in the harbour of Ostend (Belgium) on submerged substrates of different nature, in order to study the following less known aspects of fouling: a) the successive stages in the development of fouling, from bacteria to macro-organisms.  b) the influence of several factors on its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fouling Harbours Marine pollution ANE; Belgium; Oostende Harbour.
Ano: 1971
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3431

Contributions à l'étude des bactéries marines du littoral belge: III. Milieux de culture et ensemencements
Provedor de dados: 27
Autores: Persoone, G.
In order to detect a suitable medium for the enumeration of marine bacteria, several culture media were compared by two methods of plating: « pour plates » after Koch, and « spread plates ».The optimum period of incubation to get a maximum number of colonies on the dishes was determined.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria ANE; Belgium; Belgian Coast.
Ano: 1966
URL: http://www.vliz.be/imisdocs/publications/289062.pdf

Recyclage van biodegradeerbare afvalstoffen door aquatische voedselketens: wetenschappelijk eindverslag
Provedor de dados: 27
Autores: Persoone, G.
Tipo: Info:eu-repo/semantics/book
Ano: 1980
URL: http://www.vliz.be/imisdocs/publications/314902.pdf

Kennen Sie die Lebensgeschichte von &lt;i&gt;Artemia salina&lt;/i&gt;?
Provedor de dados: 27
Autores: Sorgeloos, P.; Persoone, G.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Life history; Artemia salina.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3437

Contributions à l'étude des bactéries marines du littoral belge: 1. Un appareil simple pour détacher et obtenir en suspension les bactéries contaminant des surfaces
Provedor de dados: 27
Autores: Persoone, G.
Description of a simple aparatus to remove and suspend bacteria contaminating surfaces.
Tipo: Info:eu-repo/semantics/article
Ano: 1964
URL: http://www.vliz.be/imisdocs/publications/294267.pdf

Perspectives in maricultural technologies
Provedor de dados: 27
Autores: Persoone, G.; Sorgeloos, P.
Starting with the major issues of the recent World Conference on Aquaculture, organized in 1981 jointly by the European Mariculture Society and the World Mariculture Society, the paper indicates a number of new and appealing maricultural technologies in shellfish and fish farming. It is postulated that several of the techniques described will have a far-reaching impact on maricultural production in the next decade. Special attention is given to the potential of the mass production of brine shrimp &lt;i&gt;Artemia&lt;/i&gt; in extensive and intensive operations, and in particular to its key role in vertically integrated aquaculture.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Literature reviews.
Ano: 1982
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3385

Proposal for a short-term toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii
Provedor de dados: 27
Autores: 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 &lt;i&gt;Artemia&lt;/i&gt; larvae is proposed. This test is the result of an extensive study in our laboratory, taking into account the advantages and disadvantages of &lt;i&gt;Artemia&lt;/i&gt; 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

Pollution in the harbour of Ostend (Belgium): biological and hydrographical consequences
Provedor de dados: 27
Autores: Persoone, G.; De Pauw, N.
1. Ostend, situated in the middle of the Belgian coast, is a typical seaside resort with a population of 60,000 in the winter and up to 200,000 in summer. All sewage (to the major part raw dornestic sewage, to a lesser extent sewage of industrial origin) flows into its harbour, causing a daily in flow of ca. one part of sewage per 100 parts of harbour  water. This heavy pollution load causes significant physico-chemical and biological consequences. 2. The number of "estuarine" bacteria has increased enormously due to the great daily input of organic matter. The number of coliform bacteria is high; it decreases towards the seaward entrance of the harbour. 3. The beach in the small vicinity of the harbour is polluted. 4. The harbour water contains low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Harbours Pollution ANE; Belgium; Oostende Harbour.
Ano: 1968
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3438

The influence of inorganic and organic pollutants on the rate of reproduction of a marine hypotrichous ciliate: &lt;i&gt;Euplotes vannus&lt;/i&gt; Muller
Provedor de dados: 27
Autores: Persoone, G.; Uyttersprot, G.
Within the Belgian interdisciplinary research program "Mathematical model of the North-Sea", experiments are being carried out in order to determine the toxicity of various inorganic and organic compounds on marine pelagic and benthic organisms. Several concentrations of 5 heavy metal ions, 5 common pesticides and one PCB have been tested. The present report concerns the effect of lead, copper, mercury, zinc and cadmium ions, as well as DDT, DDE, hexachlorobenzene, heptachlor, hexachlorcyclohexane and Aroclor ® 1245, on the rate of reproduction of a common marine hypotrichous ciliate: &lt;i&gt;Euplotes vannus&lt;/i&gt; Muller. Among the heavy metals tested mercury is the most toxic: total inhibition at the 1 ppm level; copper gives a 50 % inhibition at 1...
Tipo: Info:eu-repo/semantics/article
Ano: 1975
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3503

Predictive value of laboratory tests with aquatic invertebrates: influence of experimental conditions
Provedor de dados: 27
Autores: Persoone, G.; Van de Vel, A.; Van Steertegem, M.; De Nayer, B.
Considering the difficulty of making meaningful extrapolations of laboratory bioassay data to real world situations, short-term tests have been carried out in a factorial pattern to determine the magnitude of effect variation resulting from changes in experimental abiotic conditions.Three selected zooplankton species (the rotifer &lt;i&gt;Brachionus plicatilis&lt;/i&gt;, the brine shrimp &lt;i&gt;&lt;i&gt;Artemia&lt;/i&gt; salina&lt;/i&gt; and the waterflea &lt;i&gt;Daphnia magna&lt;/i&gt;) have been exposed to increasing concentrations of two chemicals (one inorganic and one organic) in different combinations of two major environmental variables.For the brackish water rotifer &lt;i&gt;B. plicatilis&lt;/i&gt; the acute toxicity of potassium dichromate and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia salina; Brachionus plicatilis; Daphnia magna.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3189

Air-lift pumps and the effect of mixing on algal growth
Provedor de dados: 27
Autores: Persoone, G.; Morales, J.; Verlet, H.; De Pauw, N.
Since turbulence is an important factor for the growth of microscopic algae, the effect of mixing intensity and mixing time, has been assessed by means of air-lift pumps as an alternative technology for the agitation of algal cultures. Batch culture experiments in enriched sea water were carried out indoors with &lt;i&gt;Chlorella&lt;/i&gt; in 100 liter tanks and outdoors with natural phytoplankton populations in 70 m³ tanks. The respective culturing depths in these tanks were 25 and 180 cm. The role of the mixing was also evaluated against that of the pH regulation of the cultures. Mixing with air-lift pumps increased the algal growth rate significantly in comparison to non-agitated cultures. The yields were also much higher (up to 30%) in mixed than in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Algae culture.
Ano: 1980
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3692

The use of &lt;i&gt;Artemia&lt;/i&gt; cysts in aquaculture: the concept of "hatching efficiency" and description of a new method for cyst processing
Provedor de dados: 27
Autores: Sorgeloos, P.; Persoone, G.; Baeza-Mesa, M.; Bossuyt, E.; Bruggeman, E.
The quality of brands of &lt;i&gt;Artemia&lt;/i&gt; cysts should be expressed on a weight basis, namely the number of live nauplii hatching out per unit of weight of product and not as a "hatching percentage" since the latter concept does not take into account the degree of impurity of the material. A standardized method for the determination of the hatching efficiency is proposed. A new methodology for cyst processing has been worked out at laboratory scale, based on a 2-step cleaning (brine and tap water) followed by dehydration (air or brine) or decapsulation and dehydration (brine).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Cysts; Hatching; Artemia.
Ano: 1978
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3615

Hazard prediction and relevance of laboratory-scale studies
Provedor de dados: 27
Autores: Persoone, G.
Predictive hazard assessment of chemicals, pure, in mixtures, or as wastes, is based on the comparison of exposure to effect concentrations. Experimental determination of no-effect levels can be carried out at various levels of biological organisation: within the organism (suborganismal), on individual species (organismal), or with biological communities (supraorganismal). The difficulty of predictive effect analysis consists of relating endpoints determined at various levels of biological organisation to the impact on structure and/or function impairment of natural ecosystems. Examples are given of effect-extrapolations which have been validated at different levels, and which carry promising predictive values.
Tipo: Info:eu-repo/semantics/article
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3154

Preliminary experiments with the ciliate &lt;i&gt;Fabrea salina&lt;/i&gt; as a potential live food for mariculture purposes
Provedor de dados: 27
Autores: De Winter, F.; Persoone, G.
Mass culturing of suitable live foods for mariculture purposes is slowed down by the lack of fundamental knowledge on interesting food species with high nutritional value. Research at the laboratory level has shown that in this regard &lt;i&gt;Fabrea salina&lt;/i&gt;, a pelagic heterotrichous marine ciliate, seems to be a promising species for the following reasons. a) It can easily be fed with inert foods such as dry yeast as well as with live algae. b) With &lt;i&gt;Dunaliella viridis&lt;/i&gt; as sole food source, densities of several hundreds of ciliates per ml can be obtained quite easily. c) &lt;i&gt;Fabrea salina&lt;/i&gt; is a very euryhaline organism: the tolerance range extends from normal seawater to over 100 promille salinity. d) The ciliate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabrea salina.
Ano: 1976
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3532

&lt;i&gt;Artemia salina&lt;/i&gt; as live food in aquaculture
Provedor de dados: 27
Autores: Sorgeloos, P.; Baeza-Mesa, M.; Claus, C.; Vandeputte, G.; Benijts, F.; Bossuyt, E.; Bruggeman, E.; Persoone, G.; Versichele, D.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia salina.
Ano: 1977
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3557

A simple method for subsampling zooplankton
Provedor de dados: 27
Autores: Persoone, G.
A simple and accurate method for subsampling zooplankton suspensions is described for which one only needs graduated plastic syringes and penicillin vials with a rubber stopper.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sampling; Sampling methods; Zooplankton.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3455

Mass culture of algae: a bottleneck in the nursery culturing of molluscs
Provedor de dados: 27
Autores: Persoone, G.; Claus, C.
The controlled culture of larvae of molluscs of commercial importance (oysters, clams, etc.) till spatfall implies the daily production of substantial volumes of suitable species of microscopic algae. For economic reasons, industrial mollusc hatcheries cannot, however, upscale the very expensive indoor algal production to fulfill the increasing food demands of the growing spat. As too early transplantation of the postlarvae to the natural environment results in various technological and biological problems, the intermediate semi-controlled "nursery" culturing of the spat up to a few centimeters in length is presently more and more preconized. The different technologies utilized for nursery culturing are reviewed with special emphasis on the major problem:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Algae culture; Mollusc culture.
Ano: 1980
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3691

Establishment of a test guideline for the evaluation of fish tainting
Provedor de dados: 27
Autores: Poels, C.L.M.; Fischer, R; Fukawa, K.; Howgate, P.; Maddock, B.G.; Persoone, G.; Stephenson, R.R.; Bontinck, W.J.
A test guideline has been established for determining the potential of a chemical to taint seafood. This guideline, based on the exposure of fish and the evaluation of the imparted taint by a triangular test, has been evaluated in a small ring test in which five laboratories tested four chemicals with three fish species. The guideline also contains a procedure for estimating the loss of taint from the test species during a depuration phase in clean water. None of the following factors appeared to have a large or systematic effect on the evaluation of the potential to cause taint: the performing laboratory; type of water used (sea- or freshwater); fish species; evaluation by flavour or by odour; method of preparation and presentation of samples for sensory...
Tipo: Info:eu-repo/semantics/article
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3155