Comparisons among paternal half-sib families by fulton and alometric condition factors and growth rate in curimbatá (Prochilodus lineatus)
DOI:
https://doi.org/10.5433/1679-0359.2008v29n4p947Keywords:
Condition factor, Fish, Carp.Abstract
The determination of the condition factor in fish has been done to inform the growth, reproduction and survival in a specific environment. With the objective of comparing groups of paternal half-sibs it was conducted an experiment at the Fish Station of the State University of Londrina. It was used a sample of 253 fishes, sons of 10 Curimbata (Prochilodus lineatus) reproducers. In order to verify the possibility of their use in selection, Fulton and alometric condition factors were determined, as well as the growth rate. The results suggested that the progeny of the majority of the reproducers presented negative alometric growth (b < 3.0). There was only one exception, where the progeny of one male showed an isometric growth (b = 3.0). The identification of reproducers, which the progeny presented greater growth rate, was done by the alometric condition factor. The condition factor of Fulton, which uses the regression coefficient of b = 3.0, was not viable. Selection to improve the traits alometric condition factor and growth rate is possible with the utilization of the progeny selection, since these traits present low heritability (h2 = 0.20).
Downloads
Published
How to Cite
Issue
Section
License
Semina: Ciências Agrárias adopts the CC-BY-NC license for its publications, the copyright being held by the author, in cases of republication we recommend that authors indicate first publication in this journal.
This license allows you to copy and redistribute the material in any medium or format, remix, transform and develop the material, as long as it is not for commercial purposes. And due credit must be given to the creator.
The opinions expressed by the authors of the articles are their sole responsibility.
The magazine reserves the right to make normative, orthographic and grammatical changes to the originals in order to maintain the cultured standard of the language and the credibility of the vehicle. However, it will respect the writing style of the authors. Changes, corrections or suggestions of a conceptual nature will be sent to the authors when necessary.