Critical oxygen tension increases during digestion in the perch Perca fluviatilis

Authors: Thuy, N. H.; Tien, L. A.; Tuyet, P. N.; Huong, D. T. T.; Cong, N. V.; Bayley, M.; Wang, T.; Lefevre, S.

Source: Journal of Fish Biology, Volume 76, Number 4, March 2010 , pp. 1025-1031(7)

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Abstract:

Oxygen uptake ( ) and critical oxygen tension (P_crit) were measured in resting perch Perca fluviatilis that were either fasting or digesting. Digestion caused to double (from 61 to 117 mg O₂ kg⁻¹h⁻¹) and was associated with a rise in P_crit (from 3·4 to 4·9 kPa), showing that the animal's digestive state must be considered when assessing the effect of hypoxia in natural conditions, and when defining optimal oxygen conditions in aquaculture.

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1095-8649.2009.02533.x

Affiliations: 1: Zoophysiology, Department of Biological Sciences, Aarhus University, C.F. Møllersvej Building 1131, 8000, Aarhus C, Denmark

Publication date: 2010-03-01