Marisia - Maros Megyei Múzeum Évkönyve 29-30/2. (2010)

Zoology

Gabriela GRIGORAS

Tab. 10: Allometric Condition Factor (variable and constant b coefficients both) and statistically comparisons (P<0,05, t-Student test) between the samples collected in autumn and spring in bighead carp Aristichthys nobilis (Richardson, 1845) during the experiments

Allometric Condition Factor, K’ Allometric Condition Factor, K”

g (variable b coefficient) (constant b coefficient)

u Season Statistical Statistical

j* Range differences Range differences

(T-Student test) (T-Student test)

Autumn 1,6—2,3 1,8—2,5

Exp. 1--------------------------------------------P < 0.05 --------------------------- P < 0.05

Spring 1,0—2,1 1,0-2,2

Autumn - -Exp. 2-------------------------------------------Spring 0,6—1,3 0,6—1,3

Autumn 2,7—3,7 2,3—3,0

Exp. 3--------------------------------------------P < 0.05 --------------------------d.n.

Spring 0,9-1,4 ____________ 2,1-3,1 __________________

The fish sampled before and after cold season show statistically significant differences (P < 0.05) that are in connection with depreciation of condition state during the wintering.

The average values and also the minim, maxim and quartile range (25-75%) for K’ (with variable b coefficient) and K” (with constant b coefficient) are shown in figure 2, 3, 4, 5, 6, 7.

□ average ■ sim ciuarlile И MAX mf quartile MINI

Fig. 2: The variation of Allometric Condition Factor (variable b coefficient) in reared juvenile cyprinids species during on experiment no 1 (Brates station)

□ average ■ sun cmartile IMAX mfuuaitile MINI

Fig. 3: The variation of Allometric Condition Factor (constant b coefficient) in reared juvenile cyprinids species during on experiment no 1 (Brates station)

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