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A new radiotracer technique involving 14C and 51Cr, for estimating the assimilation efficiencies of aquatic, primary consumers

A new radiotracer technique involving 14C and 51Cr, for estimating the assimilation efficiencies... Gravimetric, radiotracer, and indicator methods currently available for estimating assimilation efficiencies, have been reviewed and their associated limitations have been discussed. It was concluded that the basic assumption implicit to gravimetric and indicator techniques, i.e. that all material contained within the faeces is derived from the food, does not generally hold. Radiotracer techniques are not based on this assumption but are time consuming. Consequently a new radiotracer technique analogous to indicator methods has been developed. In this technique the concentration of a non-absorbed indicator is expressed in terms of a radiotracer, 14C, which can be absorbed but which, at least initially, is only present in the food, rather than expressing it in terms of dry weight. 51Cr has been used as the nonabsorbed indicator. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Oecologia Springer Journals

A new radiotracer technique involving 14C and 51Cr, for estimating the assimilation efficiencies of aquatic, primary consumers

Calow, P.; Fletcher, C.
Oecologia , Volume 9 (2) – Sep 2, 2004
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References (41)

Publisher
Springer Journals
Copyright
Copyright © 1972 by Springer-Verlag
Subject
Life Sciences; Ecology; Plant Sciences; Hydrology/Water Resources
ISSN
0029-8549
eISSN
1432-1939
DOI
10.1007/BF00345880
Publisher site
See Article on Publisher Site

Abstract

Gravimetric, radiotracer, and indicator methods currently available for estimating assimilation efficiencies, have been reviewed and their associated limitations have been discussed. It was concluded that the basic assumption implicit to gravimetric and indicator techniques, i.e. that all material contained within the faeces is derived from the food, does not generally hold. Radiotracer techniques are not based on this assumption but are time consuming. Consequently a new radiotracer technique analogous to indicator methods has been developed. In this technique the concentration of a non-absorbed indicator is expressed in terms of a radiotracer, 14C, which can be absorbed but which, at least initially, is only present in the food, rather than expressing it in terms of dry weight. 51Cr has been used as the nonabsorbed indicator.

Journal

Oecologia – Springer Journals

Published: Sep 2, 2004

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