Estimation of Phosphorus Metabolic Rates of Daphnia-Galeata Using a 3-Compartment Model

TY - JOUR

T1 - Estimation of Phosphorus Metabolic Rates of Daphnia-Galeata Using a 3-Compartment Model

AU - Perez-Martinez, C.

AU - Van Tongeren, O.F.R.

AU - Gulati, R.D.

N1 - Reporting year: 1995 Metis note: 2037; CL; AFW ; AqE; file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs1995\Perez-Martinez_ea_2037.pdf

PY - 1995

Y1 - 1995

N2 - A compartment model to estimate the different phosphorus metabolic rates in Daphnia galeata is presented. The model has three compartments: gut, metabolic pool and structural pool. Existing two-compartment models used for carbon and phosphorus turnover in Daphnia do not allow estimation of ingestion and egestion rates. We extended existing two-compartment models with one more compartment, the gut, which allowed us to estimate both the ingestion and the egestion rates. Parameters of the model are estimated from a single experiment of feeding unlabelled Daphnia with P-32-labelled Scenedesmus obliquus. Separate experiments with juvenile and adult daphnids were carried out in order to compare their metabolisms. This model permits a reliable estimation of the different metabolic rates of Daphnia in a single experiment and discriminates clearly between animals of different sizes. [KEYWORDS: Scenedesmus-acutus; food; zooplankton; release; assimilation; ingestion; quality; carbon; dependence; nitrogen]

AB - A compartment model to estimate the different phosphorus metabolic rates in Daphnia galeata is presented. The model has three compartments: gut, metabolic pool and structural pool. Existing two-compartment models used for carbon and phosphorus turnover in Daphnia do not allow estimation of ingestion and egestion rates. We extended existing two-compartment models with one more compartment, the gut, which allowed us to estimate both the ingestion and the egestion rates. Parameters of the model are estimated from a single experiment of feeding unlabelled Daphnia with P-32-labelled Scenedesmus obliquus. Separate experiments with juvenile and adult daphnids were carried out in order to compare their metabolisms. This model permits a reliable estimation of the different metabolic rates of Daphnia in a single experiment and discriminates clearly between animals of different sizes. [KEYWORDS: Scenedesmus-acutus; food; zooplankton; release; assimilation; ingestion; quality; carbon; dependence; nitrogen]

U2 - 10.1093/plankt/17.8.1605

DO - 10.1093/plankt/17.8.1605

M3 - Article

VL - 17

SP - 1605

EP - 1619

JO - Journal of Plankton Research

JF - Journal of Plankton Research

SN - 0142-7873

IS - 8

ER -