Relación entre factores dimensionales y de composición en la determinación de la calidad del huevo en tilapia roja (Oreochromis spp)
Loading...
Date
2013-09-24
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. The quality of eggs is an inclusive
and necessary module for fish cultivation, and its
applicability has been demonstrated in species of
production interest. Objective. As an strategy to improve
the production standards for red tilapia, this
research work aimed to determine the existence of
functional relationships between the egg´s structure
under dimension and composition terms, and the
quality results defined in terms of survival during
the first stages. Materials and methods. A follow
up process was performed on the spawnings of 50
females and, for each one and her corresponding oviposition, records of 15 morphometric and dimensional
variables were taken, respectively, and complemented
with 11 variables more, associated to the
egg´s composition. The efficiency of the production
process was determined departing from survival,
which was registered through three efficiency rates
(IEINC: incubation; IELARV: larvae culture and IETOTAL,
which gathers the first two). The analysis
of the data was performed based on significant correlations
(α=0.05), determined between the pairs
of variables and between these and the indexes.
When it was pertinent, descriptive models were determined
via simple and multiple linear regressions.
Results. No significant relationship was established
in the efficiency between the incubation and larviculture
stages. Linear equations were obtained, thus
explaining IEINC through the volume of the oviposition
and the IELARV through the density of the egg,
although the determination coefficients were low in
the models defined. The significant linear relationships,
which with a major adjustment explain the indexes,
included the content of saturated fat acids in
particular. Conclusions. Despite the fact the models
calculated were significant, their practical usefulness
is limited because the low prediction capability provided
by the reduced determination coefficients defined.
The total efficiency of the process depends,
mainly, on the results that appear during the incubation,
because there was no relationship between the
survival during the incubation and larvae culture stages
in the production of fingerlings of this species.
Description
Keywords
Corporación Universitaria Lasallista, Tilapia (Oreochromis Niloticus), Tilapia roja, Larvicultura, Tilapia roja - Cultivo, Acuicultura