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(2007-2008). The maximum avarege level of gills (7±2 µg/g dry wt.) was detected in summer (2010-2011). In
summer, highest mean concentration of gonads (4±2 µg/g dry wt.) was obtained (2007-2008) (Table 4).
Table 4 Mean Cu concentrations (µg/g dry wt.) in selected organs of
K. pelamis
from the Karachi coast
Years
Seasons
n
Muscles (X±SD)
Liver (X±SD) Kidney (X±SD)
Gills (X±SD)
Gonads (X±SD)
2006-2007
autumn
16
4±2
48±21
4±2
3±1
3±1
winter
14
3±1
36±20
5±2
5±1
2±1
spring
16
4±1
41±14
2±1
4±1
2±1
summer
20
4±1
39±22
5±2
3±1
3±1
2007-2008
autumn
14
4±2
49±25
6±2
5±2
3±1
winter
16
3±1
63±26
5±1
4±1
3±1
spring
12
3±1
56±21
3±1
5±2
3±1
summer
18
4±1
67±17
6±1
4±2
4±2
2008-2009
autumn
16
4±1
50±21
5±2
4±2
4±1
winter
18
3±2
51±12
4±2
6±1
3±1
spring
14
5±2
41±16
5±1
5±1
3±1
summer
23
6±2
36 ±13
5±2
6±2
4±1
2009-2010
autumn
12
5±1
50±17
3±2
5±1
2±1
winter
18
3±2
44±18
5±1
5±1
3±1
spring
16
5±2
50±22
5±2
5±2
3±1
summer
18
6±2
53±20
5±2
6±1
4±1
2010-2011
autumn
14
6±1
61±16
4±2
6±2
3±1
winter
18
7±2
50±18
5±2
6±1
3±1
spring
12
3±1
63±21
5±2
5±1
2±1
summer
20
4±1
62±23
4±2
7±2
2±1
Table 5 Mean Zn concentrations (µg/g dry wt.) in selected organs of
K. pelamis
from the Karachi coast
Years
Seasons
n
Muscles (X±SD)
Liver (X±SD) Kidney (X±SD)
Gills (X±SD)
Gonads (X±SD)
2006-2007
autumn
16
2±2
35±18
3±2
2±1
2±1
winter
14
6±3
24±22
4±2
2±1
2±1
spring
16
2±1
22±18
4±1
3±1
2±1
summer
20
4±2
51±19
5±2
4±1
3±2
2007-2008
autumn
14
2±1
36±20
5±1
2±1
4±1
winter
16
5±2
39±12
5±1
3±2
2±1
spring
12
3±2
34±17
4±1
3±2
3±2
summer
18
5±2
35±20
5±2
4±1
2±1
2008-2009
autumn
16
4±2
45±18
4±1
4±2
3±1
winter
18
4±2
38±19
3±2
4±1
3±2
spring
14
6±2
54±22
4±2
5±1
4±2
summer
23
4±2
56 ±21
5±1
5±1
4±1
2009-2010
autumn
12
6±3
47±20
5±1
6±2
5±2
winter
18
6±2
68±21
4±2
5±2
4±1
spring
16
5±2
49 ±19
6±3
5±2
5±2
summer
18
6±3
49±20
4±2
5±2
3±1
2010-2011
autumn
14
4±2
50±18
5±2
4±3
4±2
winter
18
7±2
44±13
5±1
5±2
3±1
spring
12
6±2
37±17
8±1
5±1
2±1
summer
20
6±3
35±11
6±1
6±2
4±1
(iv) Zn (Zinc):
The maximum mean value of Zn (68±21 µg/g dry wt.) was found in liver during winter
(2009-2010) and the minimum mean value in liver (22±18 µg/g dry wt.) was determined in spring (2006-2007). In
winter, highest mean concentration of muscles (7±2 µg/g dry wt.) were obtained (2010-2011) and the lowest
