{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T08:42:34Z","timestamp":1773045754133,"version":"3.50.1"},"reference-count":54,"publisher":"Cambridge University Press (CUP)","issue":"11","license":[{"start":{"date-parts":[[2013,4,30]],"date-time":"2013-04-30T00:00:00Z","timestamp":1367280000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Nutr"],"published-print":{"date-parts":[[2013,12,14]]},"abstract":"<jats:p>Acid\u2013base disturbances caused by environmental factors and physiological events including feeding have been well documented in several fish species, but little is known about the impact of dietary electrolyte balance (dEB). In the present study, we investigated the effect of feeding diets differing in dEB (\u00a0\u2212\u00a0100, 200, 500 or 800\u00a0mEq\/kg diet) on the growth, nutrient digestibility and energy balance of Nile tilapia. After 5 weeks on the test diet, the growth of the fish was linearly affected by the dEB levels (<jats:italic>P<\/jats:italic>&lt;\u00a00\u00b7001), with the lowest growth being observed in the fish fed the 800 dEB diet. The apparent digestibility coefficient (ADC) of fat was unaffected by dEB, whereas the ADC of DM and protein were curvilinearly related to the dEB levels, being lowest and highest in the 200 and 800 dEB diets, respectively. Stomach chyme pH at 3\u00a0h after feeding was linearly related to the dEB levels (<jats:italic>P<\/jats:italic>&lt;\u00a00\u00b705). At the same time, blood pH of the heart (<jats:italic>P<\/jats:italic>&lt;\u00a00\u00b705) and caudal vein (<jats:italic>P<\/jats:italic>&lt;\u00a00\u00b701) was curvilinearly related to the dEB levels, suggesting the influence of dEB on postprandial metabolic alkalosis. Consequently, maintenance energy expenditure (MEm) was curvilinearly related to the dEB levels (<jats:italic>P<\/jats:italic>&lt;\u00a00\u00b7001), being 54\u00a0% higher in the 800 dEB group (88\u00a0kJ\/kg<jats:sup>0\u00b78<\/jats:sup>per d) than in the 200 dEB group (57\u00a0kJ\/kg<jats:sup>0\u00b78<\/jats:sup>per d). These results suggest that varying dEB levels in a diet have both positive and negative effects on fish. On the one hand, they improve nutrient digestibility; on the other hand, they challenge the acid\u2013base homeostasis (pH) of fish, causing an increase in MEm, and thereby reduce the energy required for growth.<\/jats:p>","DOI":"10.1017\/s0007114513001323","type":"journal-article","created":{"date-parts":[[2013,4,30]],"date-time":"2013-04-30T13:47:50Z","timestamp":1367329670000},"page":"1948-1957","source":"Crossref","is-referenced-by-count":27,"title":["Dietary electrolyte balance affects the nutrient digestibility and maintenance energy expenditure of Nile tilapia"],"prefix":"10.1017","volume":"110","author":[{"given":"S.","family":"Saravanan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Geurden","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Z. G. 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