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| Registros recuperados: 34 | |
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| Herman, P.M.J.; Heip, C.H.R.; Vranken, G.. |
| The ostracod <i>Cyprideis torosa</i> Jones,1985 is a dominant species in the meiofauna of brackish water habitats. Its production in the field over a five-year period has been calculated using two production models. The first model uses the age-distribution of shells preserved in the sediment to assess the stage-specific mortality rates and the stage durations. The second model is the size-frequency model, modified for use with development stages instead of size-classes. Productions calculated with both methods agree very well. Their values are 9.7 and 9.2 g dwt.m<sup>-2</sup>y<sup>-1</sup> respectively. The yearly P/B-ratio is 2.7 or 2.6y<sup>-1</sup>, production efficiency P/A is 0.38 or 0.37. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secondary production; Cyprideis torosa. |
| Ano: 1983 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3396 |
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| Herman, P.M.J.; Heip, C.H.R.. |
| The ostracod <i>Cyprideis torosa</i> Jones 1850 is a dominant species in brackish water habitats. To assess its importance, growth and respiration were measured. The shells form an increasing part of total weight as the animals grow but there is no correlation between shell weight and soft parts weight in the adults, indicating that tissue growth is a continuous process in these ostracods. Respiration was measured at 20 °C. The slope of the log-log regression of respiration on dry weight was 0.746, showing that <i>Cyprideis torosa</i> follows the general rule for this relationship. The respiration rate per unit biomass was 0.246 nl O<sub>2</sub> µg<sup>-1</sup> h<sup>-1</sup>, which is low but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth; Respiration; Cyprideis torosa. |
| Ano: 1982 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3382 |
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| Soetaert, K.; Herman, P.M.J.. |
| The net growth rate of marine zooplankton entering the Westerschelde estuary was investigated using an advective-dispersive transport model that simulates zooplankton biomass behaving conservatively in the estuary. Total biomass of marine zooplankters in the Westerschelde was much lower than what would be expected based on transport alone, indicating negative growth rates in the estuary. Including a net consumption term in the transport model allowed the estimation of total net mortality. About 3% of all marine zooplankters that enter the Westerschelde with the flood currents are retained in the estuary, where they die. On average, 5% of the total marine zooplankton biomass in the estuary died per day. Each year a net amount of about 1500 t of zooplankton... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1994 |
URL: http://www.vliz.be/imisdocs/publications/227081.pdf |
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| Huys, R.; Herman, P.M.J.; Heip, C.H.R.; Soetaert, K.. |
| During a synoptic survey carried out in April-May 1986, 171 localities were sampled in the North Sea as delimited by the Straits of Dover in the south and approximately by the 100m isobath in the north. Meiobenthos included Nematoda, Copepoda, Turbellaria, Gastrotricha, Polychaeta, Oligochaeta, Priapulida, Kinorhyncha, Ostracoda, Halacarida, Isopoda, Tanaidacea, Bryozoa, Cnidaria, Sipunculida, Echiurida, Nemertini and Tardigrada. Nematodes were the dominant group in virtually all stations, their densities ranging from 61 to 4167 individuals. 10cm<sup>-2</sup>. Only in the Southern Bight, where nematode numbers were low, did harpacticoids sometimes represent the dominant meiobenthic taxon. There was a tendency for nematode (and total... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1992 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7250 |
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| Registros recuperados: 34 | |
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