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| Heip, C.H.R.. |
| The spatial pattern of the ostracod <i>Cyprideis torosa</i> (Jones. 1850) is aggregated and can be described by the negative binomial distribution. The fit of the observed distribution to the negative binomial is less well for the total number of females because females that are not carrying eggs tend to be independently distributed from both females carrying eggs and males. The aggregations are roughly circular with a radius of about 13 cm and may be themselves aggregated. A method to picture the aggregations is described. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyprideis torosa. |
| Ano: 1976 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3527 |
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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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| 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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