|
|
|
| Registros recuperados: 10 | |
|
|
| Smol, N.; Huys, R.; Vincx, M.. |
| Sublittoral meiofauna of 24 stations was monitored over 4 years (1984-1987) in and around a dumping site for TiO<sup>2-</sup> acid waste in the Southern Bight of the North Sea off the Dutch coast. The meiofauna was examined quantitatively and qualitatively with special reference to the nematode and the copepod community structure down to species level and to the trophic structure of the nematodes. Biological, sedimentological, geographical parameters and the concentration of several heavy metals were subject to multivariate statistical analysis and classification techniques to evaluate the impact of the TiO<sup>2-</sup> dumping activities. The meiofauna is dominated by nematodes, copepods, gastrotrichs and turbellarians. There is a... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1991 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2890 |
| |
|
|
| Heip, C.H.R.; Smol, N.; Hautekiet, W.. |
| The extraction of nematodes and harpacticoid copepods from muddy sediments or sediments containing a large amount of organic detritus can be achieved through a series of centrifugations of the material in a sacharose solution of at least 900 g/l. The number of individuals appearing in the supernatant after each centrifugation forms a geometric series, with a ratio which is dependent on the amount of material, the concentration of the saccharose solution, and the acceleration of the centrifuge. Knowledge of this ratio allows an estimation of density after only one centrifugation. More than 90 % of the animals present in the sample can be extracted after only two centrifugations. |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1974 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3492 |
| |
|
| |
|
|
| Heip, C.H.R.; Smol, N.; Absillis, V.. |
| The large nematode <i>Oncholaimus oxyuris</i> Ditlevsen, 1911 is a dominant predator in a shallow polyhaline brackish-water pond in Belgium. The reproductive potential of this species was calculated as the intrinsic rate of natural increase r = 1/<i>G</i> ln <i>pN<sub>e</sub></i>, in which <i>D</i> is the generation time, <i>p</i> is the percentage of females, and <i>N<sub>e</sub></i> is the number of eggs per female. The generation time varies between 570 days at 5°C and 101 days at 25°C and is the main factor in the determination of <i>r</i>. The relationship between <i>r</i> and temperature is nearly linear and is given by... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1978 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3577 |
| |
|
|
| Heip, C.H.R.; Smol, N.. |
| The reproductive potential of two harpacticoid copepods, <i>Tachidius discipes</i> and <i>Paronychocamptus nanus</i>, as measured by the intrinsic rate of natural increase, r<sub>m</sub>, has been studied. The influence of temperature on all factors used in the calculation of r<sub>m</sub> has been taken into account. Generation time, which has also been detected in a third species, <i>Nitocra typica</i>, is the single factor which is most affected by temperature and which has the most pronounced effect on r<sub>m</sub>. Values of the reproductive potential differ considerably according to temperature, and thus to the time of the year; during the spring bloom more than half the... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1976 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3528 |
| |
|
| |
|
|
| Heip, C.H.R.; Smol, N.. |
| The predator-prey system between the polyp <i>Protohydra leuckarti</i> and the harpacticoid copepod <i>Tachidius discipes</i> is investigated using the results of a 3 year field survey and laboratory experiments involving the cultivation of the species. In the field a close relationship between numbers of predator and prey was observed. The possible influence of environmental factors on this relationship is discussed. A number of mathematical models is compared to investigate the possibility of realistic description of the system. It is concluded that, even during relatively long time intervals, the number of prey can be predicted from the reproductive potential of the prey on the one hand and the rate of predation and predator... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1976 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3534 |
| |
|
| |
|
| |
|
|
| Heip, C.H.R.; Vincx, M.; Smol, N.; Vranken, G.. |
| Nematodes are the most abundant metazoans in marine (littoral, estuarine, coastal and oceanic) sediments, extending from the high-water mark into the deepest oceanic trenches (Nicholas, 1975). All marine free-living nematodes are considered to be members of the meiobenthos; small organisms, mainly metazoans, which are separated from the larger macrobenthos either on a methodological basis (i.e. as all animals passing a 1 mm or a 0.5 mm sieve) or a taxonomic basis (i.e. particular animal groups such as Nematoda, Harpacticoida, Gastrotricha, Kinorhyncha, Tardigrada, Foraminifera etc. which consist exclusively or mainly of small species living in sediments). In most circumstances, nematodes are numerically the dominant group of the meiofauna. In fact, they... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Systematics; Taxonomy; Nematoda [Nematodes]. |
| Ano: 1982 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3417 |
| |
| Registros recuperados: 10 | |
|
|
|
