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Energy budgets for Stentor coeruleus Ehrenberg (Ciliophora)

journal contribution
posted on 2023-05-16, 20:46 authored by Laybourn-Parry, J
Growth and feeding rates in Stentor coeruleus fed on Tetrahymena are described in relation to prey concentrations ranging from 10:1-50:1 at 15°C and 20°C. Feeding rate was independent of temperature, but governed by prey concentration. Stentor decreased in size where less than 1,000 μJ were consumed in 24 hrs. A maximum level of growth was attained at 15°C, but not at 20°C within the range of prey concentration offered. Energy budgets, constructed using respiratory data published elsewhere (Laybourn, 1975), are presented. Assimilation efficiencies ranged from 74.4-76.4% at 20°C and 65.1-83.2% at 15°C. Gross growth efficiencies were between 70.9-73.6% at 20°C and 63.7-81.6% at 15°C. Net growth efficiencies were very high, 95.6-96.3% at 20°C and 97.5-97.9% at 15°C. The results are explained and discussed in relation to other Protozoa. © 1976 Springer-Verlag.

History

Publication title

Oecologia

Volume

22

Issue

4

Pagination

431-437

ISSN

0029-8549

Publisher

Springer

Place of publication

Germany

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in philosophy and religious studies

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