International Journal of Aquaculture, 2016, Vol.6, No.5, 1
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14
5
years for their growth and reproduction (Raiaguru, 1992), this result with a complete agreement with that reported
by (Abou-Seedo and Stephen, 2004; Javadzadeh, 2004; Hashemi et al., 2013) for the same species and (Albieri
and Araújo, 2010) for
Mugil liza
.
Figure 4 Length at first sexual maturity (L
50
) for female
L. carinata
in Suez Bay
3.4 Condition factor
(K)
The data of condition factor (K) available reflected a decrease of K value of female
L. carinata
from December
(1.02) to January (0.99), increased to (1.11) in February and showed another decrease in March (1.10) and April
(0.88) at which the lowest value was recorded, but increased afterwards to reach the maximum value in September
(1.23). K value
for male
L. carinata
showed the same decrease in value during winter from October (1.17) to
reach the minimum value in January (0.97) followed by increase in February (1.06) till May (1.13). June showed a
slight decrease of K value (1.12) while August represented the maximum K value (1.21). These results are
represented graphically in (Figure 6).
Figure 5 Length at first sexual maturity (L
50
) for male
L.
carinata
in Suez Bay
Figure 6 Condition factor for female and male of
L. carinata
in
Suez Bay
In the present study low K value of female and male of
L. carinata
during the early spawning period from October
to January was due to the fasting of fish as well as the gonadal maturation. Condition factor increase in spring
(from March to May) in male and followed by slight decrease in June, which could be explained by a loss of
organic matter associated with the laying period, while the female continued decreasing of K value in spring and
this could explained due to losing of gonads weight after spawning period to reach the minimum in April. (K)
Attained higher values in (September and August) for female and male, respectively.
The fish begin to feed vigorously before spawning period to help in maturation of gonads. The K value obtained
for
L. carinata
in Suez bay ranged between (0.88 - 1.23) for all population, and it was greater than one during
most of study time which suggests that the fish was in good condition. The ‘K’ value of
L. ramada
recorded in
Gökova bay by (Kasimoǧlu et al., 2011) was 0.45 to 1.12. (Balik et al., 2011) records mean condition factor at
0.89 in Beymelek Lagoon. The value obtained in this study is within the range obtained by (Mohamed, 1982;
