Relations among growth traits in tilapia (Orechomis nilotica)

Marco Antonio da Rocha, Edson Luis de Azambuja Ribeiro, Ivone Yurika Mizubuti, Leandro das Dores Ferreira da Silva, Anaiza Braga Bignardi, Adriana Rosa Domingues

Abstract


A sample of 250 observations in tilapia (Orechomis nilotica) was used in this work. The evaluated traits were those related to growth, i.e., body weight (BW), total body length (BL), body height (BH) and head length (HL). The data were transformed to natural logarithm, and the majority of the relations obtained (BW x BL, BW x BH, HL x BL, e HL x BH) indicated a negative alometric growth. The relation BW x HL was alometric positive. Only the relation BH x BL presented an isometric growth. A prediction equation was determined using as dependent variable the natural logarithm of body weight (lnBW), and as independent variables the natural logarithms of body length (lnBL) and body height (lnBH). The prediction equation was, lnBW = -2.97041 + 2.2145 lnBL + 0,741373 lnBH; r2 = 0.99.


Keywords


Peixes crescimento; Tilápia.



DOI: http://dx.doi.org/10.5433/1679-0359.2003v24n1p119

Semin: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional