Characterization of morphological and meristic traits and their variations between two different populations (wild and cultured) of <i>Cichlasoma festae</i>, a species native to tropical Ecuadorian rivers

Abstract

Abstract. This study was carried out to determine morphometric and meristic characteristics of two populations (wild and cultured) of Cichlasoma festae and to establish whether populations could be discriminated based on morphometric variability. Twenty-two morphometric and four meristic characters were used to test the hypothesis differentiation. Univariate analysis of variance (ANOVA) from 100 adult specimens showed significant differences (p < 0.05) for 21 standardized morphometric measurements out of 26 characters among the means of the wild and cultured Cichlasoma festae populations tested. Cross correlation amongst certain morphometric variables (i.e. body weight, total length, standard length, pre-ventral length, AC1, LC1 and P1) were medium-strong (r ≥ 0.5), while the remaining were weakly correlated (r < 0.5). The length-weight relationship parameter b and condition factor (K) values were respectively 2.21 and 1.97 (indicating allometric growth) for cultured fish groups and 2.86 and 4.07 (p < 0.05) for wild fish groups. The condition factor values were significantly different from each other and showed that feeding of cultured fish should be improved. Both groups were accurately separated (> 80 % success rate) by linear discriminant functions that included only four morphometric measures.

Application of multifactorial discriminant analysis in the morphostructural differentiation of wild and cultured populations of Vieja Azul (Andinoacararivulatus)

“…In the current study, only 2 morphometric parameters (DFRL and P3) differ between populations. In contrast, several authors (Solomon et al, 2015;González et al, 2016) found significant differences between natural and domesticated fish populations. Besides, a few of the registered meristic characters (PcFR and RPcF) showed significant differences between populations, similar to the findings of Solomon et al (2015).…”

Yield, flesh parameters, and proximate and fatty acid composition in muscle tissue of wild and cultured Vieja Colorada (Cichlasoma festae) in tropical Ecuadorian river

“…Although comparisons of the morphology between cultured and wild fishes from several species have already been carried out by several authors (Solomon et al, 2015;González et al, 2016), differences based on nutritional composition among cultured and wild C. festae stocks, have not been studied yet.…”

Fry growth modelling in Cichlasoma festae (Cichlidae) with Biobloc technology (BFT)

“…Los animales crecen de modo progresivo con diferencias significativas entre controles (p<0,05) y manteniendo en los pesos finales bajo error estándar y muy bajo coeficiente de variación. Con la tecnología Biofloc se obtuvieron crecimientos superiores a los reportados por Rodríguez et al (2017) (2) y González et al (2016) (14) para la misma especie en sistemas con recirculación de agua. Los pesos finales no se ajustaron a una distribución normal (p<0,05).…”