Iraqi Journal of Aquaculture

This review article deals with the documentation of all the
previous work on the propagation of Gattan. It was found that
the induced spawning of Gattan is similar to that of common
carp and Bunnei. The sensitive brooders needs a great care
during handling and transportation. The brooders weight
5 were 1.5-10 kg for females and 1-2.5 kg for males, with age
of 4-9 and 3-6 for the females and males respectively. The
artificial breeding season continue from10 March till mid June.
The MS222 was used for anesthesia with a concentration of
1/10000. Carp pituitary gland extract (CPG) was used in all
the previous work, with different dosage wobbled between
3-6 mg/kg for females and 2-3 mg/kg for males. The total
dosage was divided to 10 % for the first injection and 90 %
for the second. The sex products was obtained after 12-14h
from the second injection. The fertilized eggs were incubated
in Zoug jars, at 23-25 ºC and water current of 0.5-0.7 l /min.
The hatching was complete within three days. The larvae were
reared in two stages the first in indoor incubators and the
second in earthen ponds.

A field survey had been done for 41 fish farms in the districts of
Maysan governorate during 2008.The Results showed that the highest
number of fish farms was at the centre of the city of Amarah and
Alkahala(24.4%). The highest number of fish farms (16) was established
during 2007.The total area of the fish farms is 1262.5donam (donam= 1/4
hectare). The largest water area was found in Almejar (853 donam= 67.5%)
and the lowest area in Almaemona (13 donam= 2.44%.). The number of
farms with area less than 10 donam were 26 farms (63.4%). The highest
number recorded in Almaemona district (30.8%), while the farms less than
50 donam were 13 farms (31.7%). Only one farm more than 100 donam was
found in the district of Almejar. The highest proportion of dyke pond farms
was in the district of Almejar (16.66%). Three methods were used to fill the
ponds were diesel pumps, electricity and runoff, with a proportion of 57.4%,
33.33%, 9.25% respectively. The pliers for the fingerlings were either the
hatchery of Marine Sciences Centre(25%), Al Suwayrah Hatchery(51%),
farmer ponds or the environment. Highest number of farmed fish was
1181100 fish of C.carpio (84.5% of the total number).

Fishes of buni ,(Barbus sharpeyi (Gunther,1874)) with
average weight (20.13 ± 1.77) gm and common carp
,(Cyprinus carpio) with average weight (20.63 ± 0.56) gm
were reared in eight plastic aquariums of 15 L cabacity. Four
treatments (two replicates) were carried out as following:(1) 10
common carp per aquarium, (2) 8 buni and 8 common carp in
one aquaria, (3) 6 buni and 6 common carp in another
aquarium and (4) 10 buni per aquarium. Artificial food
(29.31 % protein) was fed to the fishes once daily 3 % of body
weight.Water temperature was 26-28ºC, Oxygen concentration
6.2 mg/L and pH 8.1. Results showed no significant (P>0.05)
differences between buni in 2 ,3 ,4 treatments, however fish in
treatments 4 (0.059 gm) mean growth rate showed better
growth than of fish in both 2 , 3 (0.053 , 0.056gm). The
experiment showed highest growth parameters of common
carp compared with buni .This may be due to its efficiency in
utilization of food comparing to buni, which showed lower
growth parameters. More experiments are needed, using
different types of diets to achieve better growth of buni

The study include the description of fish assemblage in Al
Saffia reservation during the period March 2006 to February
2007. Sixteen of osteichthyes species were obtained, the
highest number of species 13 was recorded during July and the
lowest 7 in November and January. The largest number of
individuals collected was obtained during July (212) and the
lowest in February (124). Four species formed 71.02% include
Alburnus mossulensis 20.64 % Liza abu19.62 % Barbus
luteus16.13 % Carassius auratus 14.46 %. The annual
values of richness (D), diversity (H) and evenness (J) were
1.95 , 2.12 and 0.76 respectively

The study is part of a comprehensive work to investigate impact of fish
enemies on cultivated species. It has taken in consideration some vital abiotic
characteristics necessary for cultivated fishes. Three fish farms were selected
in two provinces, namely Al-Manahel fish farm (presently called Al-Belad)
in Babylon province; Basrah University fish farm (Marine Science Center)
and Al-Mutawaa fish farm situated south to city of Basrah. Water samples
were monitored on monthly basis for the period from January to October
2002. Several parameters namely, temperature, pH, salinity, total alkalinity
and total hardness were measured. The highest water temperature (31ºC) was
recorded in July and August from Al-Mutawaa fish farm and the maximum
pH value 8.0 was encountered during January from Basrah university fish
farm and the lowest pH= 7.2 in May from the same farm. Results indicate a
notable rise in salinity in Al-Mutawaa fish farm and the highest (6.0 g/L)
encountered in June and the lowest (2.8 g/L) in March. The maximum
concentration of total alkalinity (172 mg/L) was from Al-Mutawaa as well
recorded in September. Values of total hardness were almost similar in Al
Manahel and Basrah university fish farms, but the latter revealed a bit higher
value in May (581 mg/L), whereas Al-Mutawaa fish farm showed, by no
means, the highest concentrations all the year round, but the maximum
(880 mg/L) was detected in March.