|
|
|
| Registros recuperados: 19 | |
|
|
| Hamerlynck, O.; Hostens, K.. |
| Frequency of occurrence of fish species was monitored on a fortnightly basis in four fykes and a weir in the Oosterschelde estuary from 1979 through 1988. This was done in order to record changes in the fish fauna that may have occurred as a response to the construction of a storm-surge barrier in the mouth of the Oosterschelde (1984-1986) and the concomitant building of compartmentalization dams in the landward part. These compartmentalization dams reduced the freshwater inflow into the system. Principal component analysis using the annual averages in frequency of occurrence suggests a slight shift occurred in the fish community separating a cluster of years 1979-1984 from the cluster 1985-1988. Many of the changes in individual species could be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fyke nets Storm surge barriers ANE; Netherlands; Oosterschelde. |
| Ano: 1994 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2584 |
| |
|
| |
|
|
| Mulder, J.P.M.; Louters, T.; Hallie, F.; Postma, R.; Craeymeersch, J.A.; Hamerlynck, O.. |
| The geomorphological and ecological response of the ebb tidal deltas of the SW Netherlands to implementation of the Delta Project during the last decades, has been the subject of an integrated research project. General observed geomorphological trends are: erosion of the delta fronts and of the relic tidal bars in the landward parts of the deltas, and sedimentation in the tidal channels and in longshore bars at the edges of the deltas. Ecologically, a general trend towards richer benthic fauna communities is observable. The integrated approach in coastal research combining geomorphological analysis of field data with numerical modelling, and integrating hydraulic, geomorphological, sedimentological and biological data, has appeared very promising. Progress... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1991 |
URL: http://www.vliz.be/imisdocs/publications/300799.pdf |
| |
|
| |
|
|
| Hamerlynck, O.; Mees, J.. |
| Monthly sampling with a sledge type gear at 24 stations in the shallow coastal area in front of the Dutch Delta (southern bight of the North Sea) shows that high densities of a variety of animals are present in the lower 1 m of the water column: the hyperbenthos. Hyperbenthic community structure is strongly dominated by seasonal fluctuations due to the sequential appearance, high abundance and disappearance of the different species of temporary hyperbenthos. In winter and early spring, when the community is dominated by its permanent residents, spatial patterns emerge. Averaged over the year, these spatial patterns are consistent with the hydrodynamic regime in the system. Sedimentation of silt occurs in the same sheltered areas where the highest biomass... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1991 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2699 |
| |
|
|
| Hamerlynck, O.; Cattrijsse, A.; Arellano, R.V.. |
| In order to estimate daily ration of juvenile <i>Potamoschistus lozanoi</i> and to evaluate the effect of tide and daylight on its feeding activity, two 24h samplings were performed, one (in 1985) with high water around midnight, the other (in 1986) with low water around midnight. Incidently, the sampling in 1985 was around neap tide and in 1986 it was around spring tide. The fish were observed to feed more intensively during the night. Daily ration in 1985 was estimated to be about 1% of body ash-free dry weight (ADW). For 1986, the estimate is about 5% of body ADW in spite of similar water temperatures at both sampling dates. It is suggested that a semilunar rhythm, either in the fish or in the invertebrate prey, is the basis of the observed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pomatoschistus lozanoi [Lozano's goby] ANE; Belgium; Zwin Belgium; Het Zwin natuurreservaat. |
| Ano: 1993 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2691 |
| |
|
|
| Arellano, R.V.; Hamerlynck, O.; Vincx, M.; Mees, J.; Hostens, K.; Gijselinck, W.. |
| The <i>Pomatoschistus minutus</i> (Pallas) and <i>P. lozanoi</i> (de Buen) stock of the ebb-tidal delta of the former Grevelingen estuary was sampled monthly from September 1992 to October 1993. Sagittae were extracted and the areas of the sagitta and sulcus acusticus were measured with a digitizer. The frequency response and auditory threshold of these two sympatric goby species were determined from the ratio of the sulcus acusticus area to the sagitta area (S:O ratio). The S:O ratio of <i>P. minutus</i> increased while in <i>P. lozanoi</i> the S:O ratio was constant with increasing standard length. The average S:O ratio of <i>P. lozanoi</i> was significantly higher than that of <i>P.... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1995 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5646 |
| |
|
| |
|
| |
|
|
| Cattrijsse, A.; Makwaia, E.S.; Dankwa, H.R.; Hamerlynck, O.; Hemminga, M.A.. |
| The utilization of an estuarine brackish marsh in the Westerschelde estuary (southwest Netherlands) by fish and crustaceans visiting the intertidal creeks at rising tides was investigated over an 18 mo period. Samples were collected every month over a tidal cycle. A stow net passively fished the nekton migrating in and out of the marsh habitat. Simultaneous measurements of current speed and waterheight allowed for quantification of the catches. Multivariate clustering and ordination techniques were applied to assess temporal changes in the nekton assemblage. A total of 68 fish and crustacean species were caught but only 38 were regular visitors of the marsh creek. The marsh nekton community proved to have a very stable character. Only 40% of the observed... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1994 |
URL: http://www.vliz.be/imisdocs/publications/316179.pdf |
| |
|
| |
|
|
| Mees, J.; Cattrijsse, A.; Hamerlynck, O.. |
| The hyperbenthic mysids and euphausiids of the subtidal shallow coastal waters (the Voordelta) and the Westerschelde estuary in the Delta area (SW Netherlands) were regularly sampled between 1988 and 1991. Two salt marshes in the brackish part of the estuary were studied in the same period. Eight mysid species and one euphausiid species were identified. The spatial and seasonal distribution patterns of all species are described. The most abundant species in the coastal area is <i>Schistomysis spiritus</i>, followed by <i>Mesopodopsis slabberi, Schistomysis kervillei</i>, and <i>Gastrosaccus spinifer</i>. In the marine part of the Westerschelde the same four species are dominant but densities are generally higher in the... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1993 |
URL: http://www.vliz.be/imisdocs/publications/316194.pdf |
| |
|
|
| Mees, J.; Hamerlynck, O.. |
| A first assessment of the ecological importance of the hyperbenthic fauna in coastal and estuarine systems was made in December 1988 in a pilot study (41 stations) covering the Westerschelde and Oosterschelde estuaries, and part of the neighbouring shallow coastal area, the Voordelta. Multivariate analysis revealed three major gradients which could be divided into seven spatially defined hyperbenthic communities. Canonical Correspondence Analysis was applied to correlate these species assemblages with a number of environmental variables measured at each station. Species distributions in the Westerschelde appear to be primarily determined by a gradient involving salinity, turbidity and dissolved oxygen. Hyperbenthic animals, mainly the mysid... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1992 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2741 |
| |
|
| |
|
|
| Hamerlynck, O.; Vanreusel, A.. |
| The nematode Mesacanthion diplechma Southern is relatively rare in sediments of the Southern Bight of the North Sea and the Dutch Delta. Strangely, it is about the only free-living nematode found in the stomachs of the sand goby Pomatoschistus minutus Pallas from the same general area and even more peculiarly several hundred animals were found in sand gobies from the central part of the Oosterschelde. The large size of the nematode and its preference for the superficial sediment layers are probable causes for the first observation. For the second observation there is at present no explanation that can be substantiated. Some nematodes are known to aggregate on dead animals and possibly the Oosterschelde gobies may have been feeding on such an aggregation. |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1993 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7256 |
| |
|
| |
|
| |
|
|
| Cattrijsse, A.; Mees, J.; Hamerlynck, O.. |
| Data are reported on the amphipods and isopods taken in a sledge-type hyperbenthos sampler in the subtidal of the Voordelta, a shallow coastal area in the Westerschelde, the last estuary of the delta area (SW Netherlands). More than 300 samples were collected between 1988 and 1991. Two salt marches in the brackish part of the estuary were sampled monthly with a flume net in 1990 and 1991.A total of 46 amphipod species (42 gammarideans, 3 caprellids and 1 hyperiid), 19 of which are new for the area were recorded. The dominant amphipod species in the Voordelta and the marine part of the Westerschelde estuary are <i>Atylus swammerdami</i> and <i>Gammarus crinicornis</i>. Estimated densities of both species are high comparison to these... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1993 |
URL: http://www.vliz.be/imisdocs/publications/316190.pdf |
| |
|
| |
| Registros recuperados: 19 | |
|
|
|
