we found fewer than a
dozen reports in the literature on experimental work directed
specifically at the effect of DO on feed intake, of which more
than half lacked replication of treatments or statistical analysis
of the results. Herrmann et al. (1962) found that food
consumption of juvenile coho salmon (Oncorhynchus kisutch)
within the weight range of 2–15 g remarkably decreased when
DO was reduced from 8 mg L−1 to lower than 5 mg L−1.
According to Tsadik and Kutty (1987), feed ingestion of Nile
tilapia (Oreochromis niloticus) of 8.1 g decreased 40% when
ambient DO fell from 7.0 mg L−1 to 1.5 mg L−1. Systematic
studies were done on only a few species, namely turbot
(Scophthalmus maximus) (Pichavant et al., 2000; Pichavant
et al., 2001), channel catfish (Ictalurus punctatus) (Buentello
et al., 2000) and European sea bass