IJA-2015v5n31 - page 8

International Journal of Aquaculture, 2015, Vol.5, No.31 1
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Table 1 Mean Morphometric Measurements And Meristic Counts of Selected Fish Species from Doma Dam
Parameters
Alestes dentex
Brycinus leuciscus
Hydrocynus breves
Hydrocynus foskali
P-value
Standard length
20.88 + 0.59
a
5.89 + 0.08
c
19.11 + 0.37
b
18.84 + 0.25
b
0.001
Weight
119.40 + 7.81
a
14.24 + 0.19
c
94.60 + 3.62
b
96.93 + 3.005
b
0.001
Body depth
9.64 + 0.41
a
3.53 + 0.04
c
4.73 + 0.13
b
4.70 + 0.12
b
0.001
Pre-dorsal distance
9.08 + 0.63
a
2.57 + 0.03
d
6.54 + 0.59
c
8.09 + 0.15
b
0.001
Eye diameter
3.36 + 0.39
b
0.41 + 0.02
d
2.21 + 0.23
c
8.74 + 0.24
a
0.001
Pectoral fin ray
12.40 + 0.05
a
11.09 + 0.08
b
9.35 + 0.36
c
12.39 + 0.04
a
0.001
Pelvic fin ray
9.00 + 0.00
b
9.00 + 0.00
b
8.67 + 0.10
c
12.78 + 0.05
a
0.001
Dorsal fin ray
10.00 + 0.00
a
7.78 + 0.05
c
10.26 + 0.47
a
8.37 + 0.04
b
0.001
Anal fin ray
19.47 + 0.00
b
13.12 + 0.11
c
22.05 + 0.85
a
9.01 + 0.05
d
0.001
Caudal fin ray
22.37 + 0.22
ab
22.22 + 0.14
b
23.21 + 0.80
a
12.23 + 0.09
c
0.001
Pored lateral line
2.82 + 0.06
d
4.22 + 0.06
c
5.16 + 0.36
b
5.76 + 0.03
a
0.001
Upper teeth rows
2.00 + 0.00
b
2.00 + 0.00
b
3.07 + 0.30
a
2.03 + 0.04
b
0.001
Lower teeth rows
2.00 + 0.00
2.00 + 0.00
2.00 + 0.00
1.00 + 0.00
0.243
Mean in the same column with different superscript differ significantly (P<0.05)
Figure 1 Discriminant Function Scores Based On Morphometric
Measurements for the Selected Fish Species from Doma Dam
Figure 2 Discriminant Function Scores Based On Meristic
Count for the Selected Fish Species From Doma Dam
Plots of canonical discriminant functions 1 for meristic
count as shown in Fig. 2 however shows overlap of
A.
dentex,
B. leuciscus
and
H. breves
and completely
separated from
H. foskali
.
4 Discussions
Fish has been said to demonstrate greater variances in
morphological traits both within and between populations
of species than any other vertebrates (Allendorf
et al
.
1987, Wimberger 1992). This study recorded significant
differences in among morphometric parameters of the
four fish species considered from Doma dam. Beacham
(1985), Beacham & Murray (1985), Beacham & Withler
(1985), Beacham et al. (1988), Lund et al. (1989) and
Kinnison et al. (1998) had earlier stated that variation
in morphometric parameters of fish is largely due to
factors such as geographical and habitat variation or
differences in genetic component based on differences
among groups in a common environment. Solomon et
al., (2015) further suggested genetic variation caused
by inbreeding, crossbreeding and other practices
leading to dilution of gene pool as the major cause of
differences in cultured and wild species of African
catfish. However the marked differences of morphology in
the present study may be linked to genetic differences of
the species. Reported morphological parameters of the
species in this study as given by
Paugy (2003) and Paugy (1990) are in line with the
results of the present study. More so this study can
serve as a useful reference material for some
parameters (such as caudal fin ray, pectoral fin rays,
spine number and lent of most fins etc.) not reported
in the previous study but measured in this study. The
1,2,3,4,5,6,7 9,10,11,12,13,14
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