Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Nonlinear Models Explain the Growth of Pure and Hybrid Neotropical Fish Fed with Different Food Programs

Woshinghton Rocha Gervaz Gervaz
,
Antonio Fernando Leonardo
,
Diogo Teruo Hashimoto
ORCID logo ,
Ivan Bezerra Allaman
,
Gabriel Rinaldi Lattanzi
,
Rafael Vilhena Reis Neto
*
Version 1 : Received: 13 July 2023 / Approved: 13 July 2023 / Online: 14 July 2023 (09:17:22 CEST)

A peer-reviewed article of this Preprint also exists.

Gervaz, W.R.; Leonardo, A.F.; Hashimoto, D.T.; Allaman, I.B.; Lattanzi, G.R.; Reis Neto, R.V. Dynamics of Growth in Purebred Pacu (Piaractus mesopotamicus) and Tambaqui (Colossoma macropomum), and Their Reciprocal Hybrids, under Varied Feeding Programs: Insights from Nonlinear Models. Genes 2023, 14, 1976. Gervaz, W.R.; Leonardo, A.F.; Hashimoto, D.T.; Allaman, I.B.; Lattanzi, G.R.; Reis Neto, R.V. Dynamics of Growth in Purebred Pacu (Piaractus mesopotamicus) and Tambaqui (Colossoma macropomum), and Their Reciprocal Hybrids, under Varied Feeding Programs: Insights from Nonlinear Models. Genes 2023, 14, 1976.

Abstract

We evaluated the growth of four genetic groups, two pure (pacu and tambaqui) and two hybrids (tambacu and paqui) of Serrasalmidae fish fed with different feeding programs. Over the five months, 30 animals from each genetic group that were evaluated in three cages with 10 animals from each genetic group per cage. A different feeding program was used for each cage, consisting of three commercial diets containing 24, 28, or 32% crude protein (CP) in different combinations. A logistic model or an exponential were used to fit the growth curves. The evaluation time did not allow the adjustment of the logistic model for the tambaqui and paqui groups, as well as for the animals fed the food program with the highest initial protein intake. Pure pacu proved to be an early performing group, while tambacu hybrid reached a higher final weight without slowing down growth.

Keywords

growth potential; growth rate; hybridization; serrasalmidae

Subject

Biology and Life Sciences, Animal Science, Veterinary Science and Zoology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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