The effect of food on the respiration rates of Daphnia magna using a flow-through system

Authors

  • Claire Schmoker Institut de Zoologie, Université de Liège
  • Santiago Hernández-León Biological Oceanography Laboratory, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria

DOI:

https://doi.org/10.3989/scimar.2003.67n3361

Keywords:

zooplankton, metabolism, feeding

Abstract


Respiration rates and gut fluorescence of the cladoceran Daphnia magna were studied using a flow-through system. This open system has the advantage of introducing food or producing a starvation effect during the course of the experiment. Severe variations in respiratory rates were observed in relation to the presence or absence of food, indicating short-term variability. Organisms kept starved or at low food for a long period (15-20 h) responded to a sudden increase in food by increasing their respiration rates three- to four-fold in parallel with their gut content. A significant relationship between gut fluorescence and respiration rates was observed, suggesting that feeding and the related swimming activity were responsible for the observed metabolic variability.

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Published

2003-09-30

How to Cite

1.
Schmoker C, Hernández-León S. The effect of food on the respiration rates of Daphnia magna using a flow-through system. scimar [Internet]. 2003Sep.30 [cited 2021Sep.28];67(3):361-5. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/486

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