J
Johan A.J. Verreth
Researcher at Wageningen University and Research Centre
Publications - 255
Citations - 10180
Johan A.J. Verreth is an academic researcher from Wageningen University and Research Centre. The author has contributed to research in topics: Clarias gariepinus & Catfish. The author has an hindex of 51, co-authored 251 publications receiving 8768 citations.
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Journal ArticleDOI
Effects of dietary carnitine and protein energy: non-protein energy ratios on growth, ammonia excretion and respiratory quotient in African catfish (Clarias gariepinus) (Burchell) juveniles
TL;DR: Two separate feeding experiments were carried out to determine the effects of dietary carnitine supplements on growth rates, total ammonia nitrogen excretion and respiratory quotient rates in the African catfish, Clarias gariepinus (Burchell), juveniles fed various diets differing in protein energy:nonprotein energy ratio (PE:NPE).
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Oxygen consumption constrains food intake in fish fed diets varying in essential amino acid composition.
Subramanian Saravanan,Subramanian Saravanan,Inge Geurden,A. Cla´udia Figueiredo-Silva,Suluh Nusantoro,Sadasivam Kaushik,Johan A.J. Verreth,Johan W. Schrama +7 more
TL;DR: A difference in food intake between diets under normoxia together with the identical oxygen consumption supports the hypothesis that food intake in fish can be constrained by a set-point value of oxygen consumption.
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Changes in oxygen content and acid-base balance in arterial and portal blood in response to the dietary electrolyte balance in pigs during a 9-h period after a meal.
TL;DR: DEB changed blood oxygen content and pH, and influenced the acid-base buffer system in pigs, and maintained a relatively constant blood pH level during the 9-h period after feeding.
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A preliminary model for dynamic simulation of growth in fish larvae: application to the African catfish (Clarias gariepinus) and turbot (Scophthalmus maximus).
TL;DR: An explanatory model that simulates growth and body composition of fish larvae is described, which indicates that an increase in the dietary protein level of currently used diets would stimulate growth and lead to a reduction in lipid deposition, providing the dietary AA profile is well balanced.
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WSSV risk factors related to water physico-chemical properties and microflora in semi-intensive Penaeus monodon culture ponds in the Philippines
TL;DR: The effect of some biotic and abiotic components of the pond ecosystem on WSSV infection and outbreak is investigated; further studies are needed to clarify the effects of water depth, water transparency, and various bacterial counts.