Abstract
Effects of temperature on body chemical composition and incidence of deformities in juvenile tench, Tinca tinca (Actinopterygii: Cypriniformes: Cyprinidae), fed a commercial dry diet and/or natural food
Highlights
Increasing the water temperature results in an increaseWater temperature is a major factor regulating fish in the standard metabolic rate (SMR) up to a certain level metabolic rates, energy expenditure, food intake, and from which a further increase in temperature depresses the nutritional efficiency
Fish growth tends to increase as the water with temperature, and, at any given temperature, the temperature increases within an optimum range of water difference between the energy gained by fish via food intake temperatures for the growth of a given species (Sadler et and the energy consumption by metabolism determines the al. 1986)
For 1758), a temperature range of 28–31°C is considered cultured fish species, these are key parameters to maximize optimal for growth (Peňáz et al 1989, Wolnicki and the efficiency with which consumed food is converted into Korwin-Kossakowski 1993)
Summary
Increasing the water temperature results in an increaseWater temperature is a major factor regulating fish in the standard metabolic rate (SMR) up to a certain level metabolic rates, energy expenditure, food intake, and from which a further increase in temperature depresses the nutritional efficiency. Water temperature is a major factor regulating fish metabolism It can influence body chemical composition and the incidence of body deformities. Determining the effects of water temperature on body chemical composition and fish body deformities is an important subject for research in fish biology and nutrition, and aquaculture. Two hypotheses were tested: 1) temperature can significantly influence body chemical composition and the incidence of body deformities in fish; 2) the effects of temperature on fish depend on their diet. Water temperature proved to significantly influence fish chemical body composition and the incidence of body deformities in fish fed dry diet. The major factor that caused fish P deficiency, and resulted in low body ash content and body deformities, was insufficient bioavailability of P in the dry diet. Water temperature appeared to only modify P deficiency symptoms in fish
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