CURVAS DE CRESCIMENTO MORFOMÉTRICO DE GUPPY (Poecilia reticulata) DO NASCIMENTO À MATURIDADE SEXUAL.

Abstract

The ornamental aquaculture in the world is an activity of economic and social importance since it can be conducted under family, generating income and serving as an option to keep the population in the rural areas. The cultivation of ornamental fish is considered one of the most profitable sectors of Brazilian fish. The Guppy is an omnivore and teleost ornamental fish originating in Central America. This is one of the best-selling fish in the world followed by Kinguios. One of the characteristics of the Guppy sexual dimorphism is present. The Guppies born with about 6mm long. There are several factors that affect the growth rate of fish, such as temperature, pH, ammonia levels, dissolved oxygen in water, power, density, and genetics. This work aims to establish morphometric growth curves based on age for the Guppy, using - if different nonlinear models. The study was conducted in the Research Lab and Production of Aquatic Organisms (LAPO), located at Campus II of the Pontifical Catholic University of Goiás (PUC - GO) in the period from February 11 to June 21, 2011. We used 128 fish species Poecilia reticulata. Were made during the trial period 64 randomized trials, with a total of 128 fish Guppy, and 2 individuals / sample of each box. For morphometric measurements were made of the head length (CCAB), standard length (CP), Height (AND) and width (NLD). For each measure and reason morphometric growth curves were estimated using the roles of Von Bertalanffy, Richards, Brody, Gompertz and Logistics. The correlation between standard length, head length, width and height taken on the dorsal fin is high and Meaningful. The models of Gompertz, Brody and Bertalanffy were the ones that best described the growth of morphometric Guppies.