Abstract: | The researches focused toward the study of relationships that exists between diverse pairs of corporal variables (total length, standard length, head length, height, and circumference and body weight) at two species of crap that belongs to the Chinese complex. Thus, we worked on a number of 100 exemplars for each analyzed specie (Aristichthys nobilis and Hypophthalmichthys molitrix). The analysis of the obtained results showed that at the two summer individuals belonging to Hypophthalmichthys molitrix specie, the variance and standard deviation values are higher. The same situation is registered in case of Aristichthys nobilis that had the same age regarding the total length, standard length and the body weight. Though the smallest coefficient of variation was observed for the average total weight of body (7.418%), while at marble crap with the same age, the body medium circumference was occupying the first place and the average body weight hold the highest values at the individuals belonging to the two genus (20,79%). The applying of the evaluation test for the significance of correlation coefficient Pearson for all the pairs of variables investigated, lead to the rejection of the null hypothesis and the acceptance of alternative hypothesis due the fact that the t calculated is higher than the critical t, so we can state that there are positive correlations. If there are positive correlations we can affirm that when the dependent variable increases, the independent variable increases too and vice versa. |
