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[Biometric analysis of hybrid fishes from experimental populations. I. Interpretation of morphological characteristics and quantification of their variability].

Variability of 8 meristic and 27 morphometric characters in 4 groups of laboratory-reared fishes have been studied. There were 2 parental groups of Barbus conchonius and Barbus sp. respectively and 2 groups of their hybrids from reciprocal crossings. Evaluation of individual characters' variability was made by using of univariate statistics including the coefficient of variation, in each group. Relation between hybrids and parental species based on hybridity quotient showed that there was no form of hybrids accurately intermediate in any evaluated character. There were found some differences between reciprocal crosses in number and configuration of the characters. By these differences, they are more related to one parental species or to the second one, respectively.