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| Registros recuperados: 1.500 | |
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| Vranken, G.; Thielemans, L.K.; Heip, C.H.R.; Vandycke, M.. |
| <i>Monhystera parelegantula</i> (De Coninck,1943) was collected from the sediment of the Sluice-dock, a euhaline-polyhaline lagoon near the harbour of Ostend (Belgium). The species was cultivated in large numbers on a bacto-agar medium with bacterial growth. Embryonic growth was studied at 30 °C and 30 promille S. Maximum embryonic length-growth occurs at the vermiform stage. Post-embryonic length-growth, studied at 25 °C and 30 promille S, is a linear function of time and may be expressed as l = 160.46 + 29.55(t-t<sub>o</sub>), where t<sub>o</sub> = time at the beginning of development; t and l = time (d) and length (µm). At 25 °C and 30 promille S, average embryonic development time and generation time are 4 and 9 d... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Life cycle Monhystrella parelegantula ANE; Belgium; Oostende Harbour; Sluice Dock. |
| Ano: 1981 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3410 |
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| Podamo, J.. |
| As nutrients are withdrawn from the environment in the proportions required for the growth of primary producers, the C/N ratio known from the literature provides a stoechiometric basis for evaluating the uptake of nitrogen resulting from phytoplankton and phytobenthos activity. This activity has been measured respectively by <sup>14</sup>CO<sub>2</sub> incorporation and O<sub>2</sub> production in <i>in situ</i> and<i> in vitro</i> experiments. The production of the phytoplankton community for the period considered (6 months) amounts to 112 g C/m². That of phytobenthos might well be one third of this amount (37 g C/m²). Therefore, nitrogen uptake would have been 14 g and 4 g C/m². As the yearly... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1974 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3485 |
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| Baeyens, W.F.J.; Goeyens, L.; Monteny, F.; Elskens, I.. |
| Samples from the Scheldt estuary have been assayed for dissolved Cd, Cu and Zn using differential pulse anodic stripping voltammetry, either as total (after UV irradiation) or labile concentrations. Under these experimental conditions, labile concentrations ranged between 51-65% of total Cu, 16-66% of total Zn and 53-91 % of total Cd. The metal-organic interactions were assessed by evaluating (a) the distribution coefficient K<sub>d</sub> for the distribution of the metals between the liquid phase (complexation) and their binding to particulate matter, and (b) the competitive effect exerted by inorganic complexing ligands using a multi-element interaction model. The proportion of organically bound metals (strong and labile) was estimated, in... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1998 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7051 |
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| Sorgeloos, P.; Tackaert, W.. |
| The recent developments in aquaculture production of fish and shrimp have resulted in increased demands for <i>Artemia</i> cysts and biomass as valuable sources of life food. Solar salt works are suitable biotopes for the integrated exploitation of salt, <i>Artemia</i> and eventually fish or shrimp. <i>Artemia</i> may be present as a natural resource in local saltworks; however in some situations characteristics of the endemic strain might justify the introduction of another <i>Artemia</i> species to increase productivity. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia. |
| Ano: 1991 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2861 |
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| Hoornaert, S.; Treiger, B.; Van Grieken, R.; Laane, R.W.P.M.. |
| A literature review is given of atmospheric trace metal concentrations in aerosols above the North Sea and the English Channel over the period 1971-1994. Literature data have been gathered and intercompared to look for possible trends in the reported concentrations. Six trace metals are considered: Cd, Cu, Pb, Zn, Ni, and Cr. A distinction is made between measurements in different regions of the North Sea, and between coastal and marine areas. The majority of the data deals with the Southern Bight, providing the most reliable trends. Strong decreasing trends are observed for the Pb and Zn concentrations above the North Sea during the years 1971-1994. For Cd, Cu, Ni, and Cr, much less data are available in the literature. Despite this, also for Cd and Cu a... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1999 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=8158 |
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| Li, J.; Vincx, M.; Herman, P.M.J.. |
| A time dynamic model was used to estimate carbon flows through nematodes in an intertidal benthic ecosystem in the Westerschelde Estuary, The Netherlands. The model calibrated the nematode biomass observed from March 1991 to February 1992. The forcing functions of the model included meiobenthos biomass, macrobenthos biomass, bacterial density, chlorophyll-a concentration, and other abiotic data such as temperature and day length. We estimate that the nematode population had a low level of standing stock 249 mg C m(-2), but a high level of carbon flow. It consumed 98 mg C m(-2) d(-1) and produced 22 mg C m(-2) d(-1). Defecation was 73 mg C m(-2) d(-1). Losses in respiration, excretion and natural death were only 3 mg C m(-2) d(-1). The annual P/B was 32 for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degradation; Ecology; Marine nematodes; Meiobenthos; Respiration. |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7296 |
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| Boudouresque, C.F.; Coppejans, E.; Marcot, J.. |
| <i>Metapeyssonnelia</i>, a new genus of the Peyssonneliaceae (Rhodophyta), is described. This encrusting orbicular alga is completely calcified by aragonite. Small unicellular rhizoids are present. The centre of the thallus shows a <i>Peyssonnelia</i>-like structure that metamorphes towards the margins of older thalli: in these metamorphosed parts, an inferior perithallus is generated downwards. Each hypothallic cell gives rise to only one coxal cell, even in the metamorphosed parts: this characteristic distinguishes the structure of <i>Metapeyssonnelia</i> from that of <i>Polystrata</i>. The type species is <i>M. feldmannii</i> nov. sp., collected at Port-Cros island (Mediterranean, France). |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1976 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3544 |
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| 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 |
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| Huys, R.. |
| A new genus and species of misophrioid copepod is described from an anchihaline lava pool on Lanzarote, Canary Islands. Boxshallia bulbantennulata gen. et spec. nov. lacks any trace of a carapace, possesses a genital double somite, and can be distinguished from other misophrioids by the presence of a bulb-shaped process on the first antennular segment, the loss of the inner coxal spine in leg 1 and the presence of 3 setae on the mandibular basis. The new genus also exhibits many plesiomorphic features such as the 27-segmented antenulla and the biramous leg 5 with a 2-segmented protopod and a well developed intercoxal sclerite in the female. On the basis of urosome segmentation and gonopore location, the holotype of... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1988 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7048 |
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| Registros recuperados: 1.500 | |
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