Open WL Archief (OWA)

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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.

Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.

Basisinformatie over ‘Open Access to scholarly information'.

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one publication added to basket [3212]
Calculations of results in grazing experiments using the counting method Tackx, M.L.M.; Van de Vrie, E.M. (1985). Calculations of results in grazing experiments using the counting method. Hydrobiol. Bull. 19(1): 29-36 In: Hydrobiological Bulletin. Netherlands Hydrobiological Society: Amsterdam. ISSN 0165-1404; e-ISSN 2214-708X, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 129120 [ download pdf ]

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Trefwoorden

Analysis > Mathematical analysis Aquatic communities > Plankton > Phytoplankton Aquatic communities > Plankton > Zooplankton Behaviour > Feeding behaviour > Grazing Equipment > Measuring devices Food intake Ingestion Ingestion > Intake > Food intake > Ingestion > Intake > Food intake > Ingestion > Intake > Food intake Marien/Kust

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Auteurs		Top
Tackx, M.L.M., meer Van de Vrie, E.M.

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Abstract

Different formulae used in the literature for calculation of ingestion rates are reviewed. Their applicability is discussed in relation to two criteria: the occurrence of saturation of the feeding and/or growth of the food particles. It is shown by simulations that the differences in results obtained by calculating ingestion following a linear or an exponential model are restricted to a few percent. Calculation of ingestion rates by substantial over- or underestimation depending on the growth constant of the food particles and the grazing time.The formula I = Vk(CztCzoekt)/N(I-ekt) is proposed for the calculation of ingestion rates under saturated circumstances.It is demonstrated that, with data obtained by multi-size class analysis, calculations on total particle concentrations are only feasible when growth constants and grazing coefficients are equal for all size classes considered.Attention is drawn to calculation problems resulting from non-normally distributed results and from non equal particle concentrations in control and grazing bottles at the beginning of the experiment. For the latter problem, two correction methods are proposed.

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