92
Aquaculture of Cypriniäs
ï
EFFECT OE A FAT—FREE DIET ON CARP
(Cyprinus carpio). H.A. KARAPA cmd 11.11.
551
KHALIL. DepmÆmem 05 Food
and Tccñno£ogy, CoUâegc 05 AgMQœÊZÏU/LQ,
_}ÈJ}}
Univ…äg 05 AZcxand/uÇa, AZcxandfuÇa, EGVPT.
To
determine the effect of a fat—free diet on growth, two—summer mirror
(Cyprinus carpio) were divided into 5 groups and reared on different diets;
they were weighed and observed over an experimental period of 90 days. The
1st group received a control diet (Vitakraft); the 2nd group was raised on
a
fat—free
diet
(defatted control diet); the 3rd and the 4th groups were fed “
the defatted diet containing 12 methyl linoleate and 12 methyl linolenate.
respectively; the 5th group was given the defatted diet containing 1% each
methyl of linoleate and linolenate. Carp raised on & fat—free diet gained
less weight than the control group. The group receiving IZ linoleate gained
more
weight than the group receiving 12 linolenate, but still less than the
controls.
The
group receiving both linoleate and linolenate had almost the
same
weight gain as the control group, but it increased noticeably after 50
'
days. Thus, both linoleate and linolenate at a level of 1% in the diet appeared to
improve the growth of carp. The feeding behavior and the physiological
?
status
of all groups were observed during the course of the experiment. Feed
was
promptly taken and all the fish were active and did not swim abnormally.
Ÿ
Changes in the fatty acid composition of total lipids in muscle and liver of
carp were
determined for the
1st and the
2nd groups.
Results show that
;
monoenoic fatty acids increased in both groups, with a rather marked increase
in the muscle and liver of the group reared on a fat—free diet.
Polyunsatu—
rated fatty acids decreased gradually in the group reared on a fat—free diet,
1
while in the control group they increased markelly.
1
MINERAL CONTENT
(MAJOR AND TRACE ELEMENTS) OF CARP (Cyprinus carpi0) FED WIË1
DIFFERENT PROTEIN AND ENERGY SUPPLIES.
M. KIRCHGEBNER and J
.
SCHŒARZ,ImLŒuÆ
5ä/L
dm Tech…chen
München, F/uzMingwuhemtephan, 19—8050, GERMANY.
In
two
trials
(I and Il),carp (Cyprinus carpio)were kept in tanks and given
six feed mixtures, with two different protein levels (41 — 51 % in trial I
and
20 — 41
% in trial II) and two different energy levels (18.3 — 20.1 MJ
digestible energy (DE) in trial I and 16.9 — 18.3 MJ (DE) in trial 11).
Mineral supplementation of all twelve diets and single components were the
same.
Both
trials were divided into two growth periods. In period ] live
weight increased from 170 to about 600 g, and in period 2 from.about 600
to
1000 g. At the end of each growth period six carp per treatment were
killed without any loss and their carcasses analysed. A total of 144 carp
were
analysed for major elements (calcium, phosphorus, sodium, potassium
and magnesium) and for trace elements (iron, zinc, manganese and copper)Because
type of diet or carp weight influenced the crude ash content of
the carp in some treatments
:
the results were
different—depending on
whether they were expressed in per g of dry matter or per g of ash. In total,
type of diet (different protein and energy supply) and different live weight
had a minor influence on the different mineral retention5. Table showing
the mean values
of all analysis for the carp (n = 144 par element) and for
the
diets
(n = 12 per element), gives an excellent overview of the mineral
composition of carp under definite feeding conditions.
Aquaculture of Cypriniäs
ï
EFFECT OE A FAT—FREE DIET ON CARP
(Cyprinus carpio). H.A. KARAPA cmd 11.11.
551
KHALIL. DepmÆmem 05 Food
and Tccñno£ogy, CoUâegc 05 AgMQœÊZÏU/LQ,
_}ÈJ}}
Univ…äg 05 AZcxand/uÇa, AZcxandfuÇa, EGVPT.
To
determine the effect of a fat—free diet on growth, two—summer mirror
(Cyprinus carpio) were divided into 5 groups and reared on different diets;
they were weighed and observed over an experimental period of 90 days. The
1st group received a control diet (Vitakraft); the 2nd group was raised on
a
fat—free
diet
(defatted control diet); the 3rd and the 4th groups were fed “
the defatted diet containing 12 methyl linoleate and 12 methyl linolenate.
respectively; the 5th group was given the defatted diet containing 1% each
methyl of linoleate and linolenate. Carp raised on & fat—free diet gained
less weight than the control group. The group receiving IZ linoleate gained
more
weight than the group receiving 12 linolenate, but still less than the
controls.
The
group receiving both linoleate and linolenate had almost the
same
weight gain as the control group, but it increased noticeably after 50
'
days. Thus, both linoleate and linolenate at a level of 1% in the diet appeared to
improve the growth of carp. The feeding behavior and the physiological
?
status
of all groups were observed during the course of the experiment. Feed
was
promptly taken and all the fish were active and did not swim abnormally.
Ÿ
Changes in the fatty acid composition of total lipids in muscle and liver of
carp were
determined for the
1st and the
2nd groups.
Results show that
;
monoenoic fatty acids increased in both groups, with a rather marked increase
in the muscle and liver of the group reared on a fat—free diet.
Polyunsatu—
rated fatty acids decreased gradually in the group reared on a fat—free diet,
1
while in the control group they increased markelly.
1
MINERAL CONTENT
(MAJOR AND TRACE ELEMENTS) OF CARP (Cyprinus carpi0) FED WIË1
DIFFERENT PROTEIN AND ENERGY SUPPLIES.
M. KIRCHGEBNER and J
.
SCHŒARZ,ImLŒuÆ
5ä/L
dm Tech…chen
München, F/uzMingwuhemtephan, 19—8050, GERMANY.
In
two
trials
(I and Il),carp (Cyprinus carpio)were kept in tanks and given
six feed mixtures, with two different protein levels (41 — 51 % in trial I
and
20 — 41
% in trial II) and two different energy levels (18.3 — 20.1 MJ
digestible energy (DE) in trial I and 16.9 — 18.3 MJ (DE) in trial 11).
Mineral supplementation of all twelve diets and single components were the
same.
Both
trials were divided into two growth periods. In period ] live
weight increased from 170 to about 600 g, and in period 2 from.about 600
to
1000 g. At the end of each growth period six carp per treatment were
killed without any loss and their carcasses analysed. A total of 144 carp
were
analysed for major elements (calcium, phosphorus, sodium, potassium
and magnesium) and for trace elements (iron, zinc, manganese and copper)Because
type of diet or carp weight influenced the crude ash content of
the carp in some treatments
:
the results were
different—depending on
whether they were expressed in per g of dry matter or per g of ash. In total,
type of diet (different protein and energy supply) and different live weight
had a minor influence on the different mineral retention5. Table showing
the mean values
of all analysis for the carp (n = 144 par element) and for
the
diets
(n = 12 per element), gives an excellent overview of the mineral
composition of carp under definite feeding conditions.