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- Title
Size-related oxygen consumption and ammonia excretion of Eurasian perch ( Perca fluviatilis L.) reared in a recirculating system.
- Authors
Stejskal, Vlastimil; Kouřil, Jan; Valentová, Olga; Hamáčkov, Jitka; Policar, Tomáš
- Abstract
Oxygen consumption (OC) and ammonia excretion rates (AE) of perch were measured under commercial-like conditions (temperature 23.3 °C) in both fed (F) and feed-deprived groups (D). Measurements were taken in triplicate in six sized batches of perch ranging from 44.8 to 336.2 g. The mean daily OC was 288.3–180.6 mg O2 kg−1 h−1 for group F fish ranging in size from 44.8 to 279.4 g body weight. The mean daily AE expressed as total ammonia nitrogen (TAN) was 13.8–5.2 mg TAN kg−1 h−1 in the same groups. Daily peaks of OC in group F perch were observed 6 h after the onset of feeding for each size group with relatively stable values up to the end of feeding. Peaks of daily AE in group F perch were observed 10 h after the onset of feeding in each size group, with a rapid decrease up to 16 h after onset. In group D, OC was 181.1–110.5 mg O2 kg−1 h−1 in the weight range 57.9–336.2 g. The daily mean AE was 1.7–0.5 TAN kg−1 h−1 in this group. No dramatic peaks of OC and AE were observed in group D perch.
- Subjects
PHOTOSYNTHETIC oxygen evolution; AMMONIA; EUROPEAN perch; BODY composition of fish; ANTHROPOMETRY
- Publication
Aquaculture Research, 2009, Vol 41, Issue 1, p135
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/j.1365-2109.2009.02316.x