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| 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 |
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| 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 |
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| Ano: 1995 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5646 |
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| Hostens, K.; HamerlyncK, O.. |
| Data on the mobile epifauna of the Oosterschelde estuary, collected by beam trawl, were compiled from several studies. Multivariate statistical techniques brought out the fact that the Oosterschelde, when compared with neighbouring areas, has a characteristic epibenthic fauna. Diversity as measured by Hill's diversity numbers N through N <sub>+infinite</sub>, is higher for the Oosterschelde (N<sub>1</sub>=4.5) than for the Voordelta (N<sub>1</sub>=3.5) and the Westerschelde (N<sub>1</sub>=2.2).Four epifaunal communities can be distinguished within the Oosterschelde, the two most seaward communities being the richest. Annual production is estimated at about 6 gADW m<sup>-2</sup>... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Production Production Production ANE; Netherlands; Oosterschelde. |
| Ano: 1994 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2585 |
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| Van Damme, P.A.; Hostens, K.; Ollevier, F.P.. |
| In the 19th century approximately 40 fish species (excluding freshwater species) were recorded in the lower Zeeschelde between the Dutch/Belgian border and Antwerpen. In comparison with the 19th century and the first half of the 20th century the total number of fish species in the Beneden-Zeeschelde has decreased considerably. The present checklist (1991-1993) of fishes of the lower Zeeschelde (excluding freshwater species) contains only 26 species. The fish community is composed of marine species (13), catadromous species (3), estaurine residents (9) and one anadromous fish species. Besides, 6 freshwater fis species have presently been recorded. The distribution of diadromous fishes, estaurine residents and freshwater fishes is probably greately affected... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1994 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=1575 |
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