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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Image analysis as a tool for measuring particulate matter concentrations and gut content, body size, and clearance rates of estuarine copepods: validation and application Billiones, R.G.; Tackx, M.L.M.; Flachier, A.T.; Zhu, L.; Daro, M.H. (1999). Image analysis as a tool for measuring particulate matter concentrations and gut content, body size, and clearance rates of estuarine copepods: validation and application. J. Mar. Syst. 22: 179-194 In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963; e-ISSN 1879-1573, meer

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Beschikbaar in	Auteurs | Dataset
VLIZ: Open Marine Archive 280853 [ download pdf ]

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Trefwoorden

Analysis > Image analysis Image analysis Image interpretation > Image analysis Marien/Kust

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Auteurs		Top | Dataset
Billiones, R.G., meer Tackx, M.L.M., meer Flachier, A.T.	Zhu, L. Daro, M.H., meer

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Abstract

The performance of image analysis in measuring suspended particulate matter concentrations was compared with that of the Coulter counter in different samples including latex spheres, diatoms and natural estuarine waters. The two techniques gave comparable numerical concentrations. Image analysis results also correlated positively with dry weight measurements of estuarine suspended particulate matter samples. The conversion of particle areas measured by image analysis into volumes was addressed by trying to determine the average height of the particles. This was done by plotting volume concentrations from the Coulter counter against area concentrations from image analysis. The resulting linear relationships were found to be significant in homogeneous samples like the spheres and diatoms but not in natural estuarine samples. Further measurements were done on cross-section views of natural particulate matter to estimate the actual height, which was found to be on the average 34% of its average diameter. Also validated is the use of image analysis in measuring body sizes and gut contents of copepods. Results show that the gut resembles a cylinder and its measurement is independent of the animal's orientation at the time of measurement. Body size measurements converted into carbon compared favorably with literature data.

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Dataset

Verspreiding van zwevende stof in het Schelde estuarium en de relatie met Mesozooplankton, meer

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