ISSN: 1812-237X

Volume 6, Issue 1

Volume 6, Issue 1, Spring 2009, Page 1-58

The impacte of the use different sources of oil on the growth performance fingerling of common carp (Cyprinus carpio L.)

Ahmad S. Al-Hason; J. H. Saleh; Nawras A. Al-Faiz

Iraqi Journal of Aquaculture, Volume 6, Issue 1, Pages 1-10

This study was conducted to determine the influence of oil sources on growth performance of fish common carp Cyprinus carpio. Four diets were formed which similar in their protein content and contains four different sources of oil which (Corn oil[A], palm oil[B], sunflower oil[C] and fish oil[D] ) 64 fish average weight ranged between (1.598 - 1.544 g) were distributed randomly on eight plastic circular form basins with capacity of 20 liters of water. Feeding fish have been tested diets on the rate of 5% of body weight by repeating each treatment for a period of 42 days. The results showed that there is no significant difference between the treatments (p> 0.05) in the values of the final weight , specific growth rate , relative growth rate and food conversion rate. As the weight increase was no significant differences (p> 0.05) between treatments (C, B, A), The treatment D (fish oil) was better than treatments (B, A) with significant difference (p <0.05) and did not different significantly (p> 0.05) from the treatment (C).

Assessment of the semen of common carp males (Cyprinus carpio) induced with Ovaprim and (CPG) during propagation processes

Faleh M. Auda; Sajed S. Al-Noor; Mustafa A. Al-Mukhtar

Iraqi Journal of Aquaculture, Volume 6, Issue 1, Pages 11-24

The biological aspects for the semen of males (Cyprinus carpio) were assessed during the spawning season, after they were artificially induced for spawning. The males were induced for insemination by injecting with Ovaprim and pituitary gland extract. Two dosages had been used 0.5 ,0.3 ml and 2,4 mg per Kg of body weight respectively. After that the volume of semen, pH, number of sperms in one ml and motility were estimated. The total volume of semen obtained from males ranged between 72 - 117 ml by using Ovaprim and pituitary respectively. while the average concentration of sperms changed between 35.3 ± 9.1×109 sperm /ml to 28.2 ± 5.2×109 sperm /ml for the Ovaprim and PG respectively. The mean of Spermatocrite value was 65.3 ±15.8 % for Ovaprim and 52.33 ±10.4 % for PG. The average motility of sperm fluctuated between 90 ±10 % and 95.4 ±5.6 % for semen were obtained from males injected by Ovaprim and pituitary respectively. The effectiveness period of sperms ranged between 101 ± 30.9 sec and 113 ±34.2 sec for the two hormone respectively. This study indicated that the males in this range of length and weight had semen suitable for the hatchery requirements.

Using the natural live food in feeding of Al-Gattan larvae ( Barbus xanthopterus Heckel )

Abdul-Hussein H. Ghazi

Iraqi Journal of Aquaculture, Volume 6, Issue 1, Pages 25-36

This study showed that the natural food could be used successfully in the rearing of Al- Gattan larvae( Barbus xanthopterus). Some types of life food were collected by by different nets , the collection site was a fish pond manure by liquid cow manure. The life food was used for the feeding of Gattan larvae and compared with artificial food coming to this pond liquid manures of cows. At the end of experiment ( 28 days), the results showed the average weight and length of larvae when fed on rotifer were 25.6 mg/ larvae and 29.3 mm/ larvae respectively. While the lowest average weight and length were for the larvae which fed on artificial food, 12.4 mg/larvae and 18.5 mm/larvae respectively. The survival rate for larvae fed on rotifer , phytoplankton and artificial food were 85 , 79 and 65 % respectively.

Preliminary Study on Hydrophytes Planted in Acidic Media

Abdul M.H. Talal

Iraqi Journal of Aquaculture, Volume 6, Issue 1, Pages 37-50

Two aquatic plants species were treated with different pH values (4, 5 and 6) for a period of one week. The experiment was carried out in laboratory conditions. Physico-chemical parameters; temperature, salinity, oxygen, total dissolved solids (TDS) and electrical conductivity (EC) were detected. Tissue analysis of the treated hydrophytes species was calculated as well; chlorophyll a content, ash, proteins, fats, carbohydrates and moisture of the tissue. The results of water analysis indicated that the salinity and conductivity were under oligohaline level, the TDS values ranged between 1.218mgl-1 and 1.396mgl-1 in pH 6 and pH 4 media respectively. The tissue analysis revealed that the carbohydrates in Ceratophyllum demersum was more than that of Salvinia natans while the ash in the later was more than that the former species ,Ceratophyllum demersum. The Chlorophyll a content had been destroyed in the tissues of Ceratophyllum demersum species, but less damage was recorded in case of Salvinia natans species when was treated with low pH media. A marked decrease in the ash contents of Ceratophyllum demersum tissues and a slight decrease in case of Salvinia natans. Increasing in protein contents were detected for both species. Low acidity had no effect on the fat contents in Ceratophyllum demersum tissues while a clear increase was detected in Salvinia natans species.. The low acidity media could cause retardation to the growth of the hydrophytes.

Synthesis and Characterization of New Biodegradable Polymers and Study of Some Properties in Phosphate Buffers

Raheem J.M; Ali K.S; Husein N.Kh

Iraqi Journal of Aquaculture, Volume 6, Issue 1, Pages 51-58

Copolymers between polylactic acid and polyethylene glycol, also alganic acid and polyethylene glycol were synthesized and diisocynate (MDI) were prepared and characterized. Swelling behaviors and loss of weight of these polyurethanes were studied by immersion of the gels in various buffer solutions. Particularly the polyurethane foam showed the highest EWC (equilibrium water constant) in time-dependent and pH-dependent swelling.