PMID: 9798252Nov 3, 1998Paper

The influence of dietary salt and energy on the response to low pH in juvenile rainbow trout

Physiological Zoology
L M D'Cruz, C M Wood

Abstract

This study evaluated the role of diet, specifically the relative importance of salt content versus energy content, in the response of juvenile rainbow trout to environmental acid stress in soft water ([Ca2+] = 0.057 mmol L-1, [Na+] = 0.047 mmol L-1). Diets were formulated at two energy levels (regular, 16.3 MJ kg-1, and low, 9.8 MJ kg-1) and two levels of NaCl (regular, approximately 263 mmol kg-1, and low, approximately 64 mmol kg-1), yielding four treatment combinations, each fed at a ration of 0.6% body weight d-1. A fifth group of fish was not fed during the experiment. All groups were subjected to an initial acid challenge (24 h at pH 5.0 plus 12 h at pH 4.0), followed by 28 d of exposure to pH 5.2. Following the initial acid challenge, typical ionoregulatory disturbances were seen, but most effects had attenuated or disappeared by day 20 of chronic low-pH exposure. However, after 28 d, fish fed the regular-salt diets maintained the restored ionic homeostasis, whereas those fed low-salt diets did not, regardless of the energy content of the diet. Growth and food conversion efficiency were greatest in trout fed the regular-energy/regular-salt diet, negative in fish fed the low-energy/regular-salt diet, and intermediate in t...Continue Reading

Citations

Sep 4, 2014·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Sunita R NadellaChris M Wood
Oct 3, 2002·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Paul R PaquinDominic M Di Toro
Jan 27, 2010·Physiological and Biochemical Zoology : PBZ·R J GonzalezA L Val
Jul 26, 2011·Ecotoxicology and Environmental Safety·Tania Y-T NgChris M Wood
Jan 12, 2010·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Carol BuckingChris M Wood
Apr 17, 2016·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Dennis Kolosov, Scott P Kelly
Aug 12, 2006·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Carol Bucking, Chris M Wood
Dec 28, 2002·The Journal of Experimental Biology·G G PyleC M Wood
Oct 3, 2002·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·James C McGeerChris M Wood
Jul 30, 2010·Environmental Science & Technology·Tania Y-T NgChris M Wood

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