Abstract
ABSTRACT The objective of this study was to describe the growth of freshwater angelfish (Pterophyllum scalare) using the Gompertz model, determining the relative growth and allometric coefficients of body components in relation to body weight and protein weight. Six hundred animals were grown until 233 days of age. Data on chemical composition (water, lipid, protein, and ash) and weight measurements were obtained each 30 days. The Gompertz growth equation was used to analyze chemical allometry and to estimate growth parameters. [...]
Highlights
The freshwater angelfish (Pterophyllum scalare) is an ornamental fish native to the Amazon, Orinoco, and Essequibo rivers in South America
The objective of this study was to describe the growth of freshwater angelfish (Pterophyllum scalare) using the Gompertz model, determining the relative growth and allometric coefficients of body components in relation to body weight and protein weight
This study provided a useful equation to predict the growth, chemical body composition, and rate of nutrient deposition across the life stages of freshwater angelfish
Summary
The freshwater angelfish (Pterophyllum scalare) is an ornamental fish native to the Amazon, Orinoco, and Essequibo rivers in South America. It is a popular aquarium species because of its characteristics such as beauty, reproductive behavior, and adaptability to captivity (Sharon et al, 2013). Several studies on different strains are available, very little is known about the nutrition, growth, and nutritional requirements of this species, factors that are essential for the release of a species on the aquaculture market. Growth and nutrient deposition are accurate parameters to investigate the feed efficiency and nutrient requirements of fish; to predict the quantitative relationship between nutrient intake and growth and/or nutrient deposition, it is necessary to apply an appropriate model (Belal, 2005)
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