Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 443673
Title The impact of elevated water nitrite concentration on physiology, growth and feed intake of African catfish Clarias gariepinus (Burchell 1822)
Author(s) Roques, J.A.C.; Schram, E.; Spanings, T.; Schaik, T. van; Abbink, W.; Boerrigter, J.; Vries, P. de; Vis, J.W. van de; Flik, G.
Source Aquaculture Research 46 (2015)6. - ISSN 1355-557X - p. 1384 - 1395.
DOI https://doi.org/10.1111/are.12292
Department(s) Onderzoeksformatie
Aquaculture
Maritiem
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) channel catfish - rainbow-trout - fresh-water - ictalurus-punctatus - oncorhynchus-mykiss - na+/k+-atpase - carpio l. - toxicity - chloride - mechanism
Abstract The nitrite threshold concentration in rearing water of African catfish (Clarias gariepinus) was assessed. African catfish with an initial mean (SD) weight of 219.7 (57.8) g were exposed to an increasing range of water nitrite from 6 (Control) to 928 µM nitrite for 28 days. Mean (SD) plasma nitrite concentrations increased from 5.0 (3.6) to 32.5 (12.6) µM at 928 µM ambient nitrite. The increase in nitrite was accompanied by gradual increase in plasma nitrate from 41.6 (28.4) µM to 420.2 (106.4) µM. Haematocrit, haemoglobin, methemoglobin, plasma concentrations of cortisol, glucose, lactate, osmolality, gill morphology and branchial Na+/K+-ATPase activity were not affected. Feed intake, final weight, SGR, FCR and mortality were not affected. We advise not to exceed a water nitrite concentration of 43 µM (0.6 mg L-1 NO2--N) to prevent the risk of reduced growth and feed intake in African catfish aquaculture.
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