ISSN: 1812-237X

Volume 13, Issue 1

Volume 13, Issue 1, Spring 2016, Page 85-0

Comparative study of fish larval communities in north and south part of Shatt Al-Arab River

Muna T. K. Al-Okailee

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 0-0

Ichthyoplankton sampling was conducted at two stations in north and south part of Shatt Al-Arab River, during January to December 2012. A total of 2709 fish larvae were collected using conical plankton net (mesh size 300µm). Five families (Mugilidae, Cyprinodontidae and Cyprinidae, Cichlidae, and Clupidae) of fish larvae were identified at Station1, while station 2 eight families (Gobiidae, Engraulidae, Sciaenidae, Soleidae, Clupeidae, Polynemidae, Bothidae and Cynoglossidae) of fish larvae were identified. The highest abundance of fish larvae occurred in May (145.17 larvae/10m²) at station 1, but station 2 in March(67.46 larvae/10m²).Water temperature showed a significant positive correlations with the number of fishes larvae families (r =0.664, r= o.830, p < 0.05 respectively) and with the total abundance of fish larvae at stations 1and 2 (r = 0.315, r= 0.470, p < 0.05 respectively). The salinity showed negative correlations with number of fishes larvae families and with abundance at station 1(r = -0.165, r = -0.700,p < 0.05 respectively), station 2 showed a significant positive correlations(r = 0.894,0.520, r= p < 0.05 respectively). Ecological indices were as follows: The highest value of diversity was in May (0.32) at station 1, while stations 2 in September (0.82), recorded highest evenness (0.42) in September at station 1, but (0.53) in October at station 2, and a peak of richness was apparent at station 1 during June (0.76), station 2 the highest value was (0.99) recorded in April. It seems that the lower reaches of Shatt Al-Arab River more diversity comparative with upper reaches of Shatt Al-Arab River, and plays a role as a spawning, feeding and nursery ground for fish larvae of freshwater and estuary species.

Environmental Assessment of Polycyclic Aromatic Hydrocarbons pollutants in the waters of the side branches of the Shatt Al-Arab River

Hamid T. Al-Saad; Dhfar. Dh. Al-Khion; Ebtihal S. Majeed; Abas A. Hantoush; Salah M. Saleh; Abdulzahra A. Alhello

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 1-12

This study was conducted in the water branches of Shatt Al-Arab River. Water samples were collected from six stations during 2013. Gas chromatography was used to identify the concentrations and type of Polycyclic Aromatic Hydrocarbons (PAHs). Total concentration of polycyclic aromatic hydrocarbons (PAHs) in water ranged from 7.24 to 17.39 ng/l. The sources of PAHs in waters were Pyrogenic and Petrogenic with predominance of etehahthNaN, Fluoreneand B(b+ k) fluoranthene the most presence and focused from PAHs compound which indicate a Pyrogenic, as well as presents of Indeno (1,2,3,cd) pyrene+ dibenzo, Benzo(g, h, i) perylene in high concentration which indicate a Petrogenic origin .
This study is a first of its kind in the branches of Shatt Al-Arab River and its represent as a background for futures studies.

The effect of various stocking densities on growth performance of Arabian yellowfin seabream (Acanthopagrus arabicus)

Abdul- Karim T. Yesser; Nawras A. Al-Faiz; Sadek A. Hussein

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 13-22

The effect of various stocking densities (20, 30, 40 fish/m3) on the final weight, weight gain, specific growth and daily growth rates in Arabian yellowfin seabream (Acanthopagrus arabicus) reared in floating cages (2m3) was studied. The trials were performed in Faw district Southern Basrah. Results indicate that stocking at 20 fish/m3 provide significant (P<0.05) final weight compared to individuals cultivated at a density 30 and 40 fish/m3, while the final weights of fish reared at a density of 30 and 40 fish/m3 didn't differ significantly (P>0.05), the highest final weight (55.58±5.84g) attained at density 20 fish/m3, 52.13 ± 6.12 at 30 fish/m3 and (50.51± 6.98) at stocking density 40 fish/m3. Statistically analysis showed that weight gain and daily growth were significant differs (P<0.05) among treatments. Specific growth rates and survival rates reveal no differences significantly (P>0.05) depending on the stocking densities 20, 30 and 40 fish/m3.

Preparation of Artificial Diets to Barbus xanthopterus larvae and Juveniles

Abdul- Karim T. Yesser

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 23-40

The study was aimed to prepare artificial diets from local ingredient to larvae and juveniles of Barbus xanthopterus, in order to examine its ability to eat dry food as a substitute to the expensive live food and study its effects on survival and growth rates. Four types of diets were processed to larvae which were: standard artificial diet as a control T1, fish meal diet T2, starter diet T4 and egg and milk mixture diet T3. Two additional diets were used for juveniles as well as the control diet which were crumbles and pellets. Aquaria and cages were employed to culture fishes on these diets. Results showed that larvae and juveniles of B. xanthopterus had accepted the dry food and showed a good survival and growth rates.

The Effect of Growth Hormone on Growth of Cyprinus carpio (L. 1758) and Tilapia zillii (Gervais, 1848) and their Muscles

Abdul- Karim T. Yesser; Akeil J. Mansour; Saad M. Saleh Abdulsamad

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 41-54

The present study investigate the effect of injections of Recombinant Human Growth Hormone (by LG® Life Sciences) on growth indicators of common carp Cyprinus carpio (L. 1758) and red belly tilapia Tilapia zillii (Gervais, 1848) and their muscles by injection of this hormone intraperitoneally (IP) with three replicates for two doses low and high, with 60 and 120 µg of human growth hormone/g Body weight respectively for both species, along with a control of 120 µg of normal saline/g Body weight. Then the changes were followed up in each treatment after every two weeks to pursue histological changes in the muscular tissue by using Cell Profiler software and measuring of growth indicators (specific growth rate (SGR) and condition factor (Kn)). The results of the study revealed that the maximum rate of percentages of the muscle fibers with area less than 314 µm2 for region R1(Dorsal side) was 88.29% in carp in high dose treatment after the eighth week of injection, while it was 88.00% for tilapia in high dose treatment after the eighth week of injection, too. In the region R2 (in tail) the maximum rate of percentages of muscle fibers with area less than 314 µm2 was recorded after the eighth week from the beginning of injection was 73.3553% for carp in high dose treatment and 85.935% for tilapia in high dose treatment. The results showed that 1.00984 and 1.000074 were the highest and the lowest values of condition factor for carp respectively. For tilapia those were 1.009993 and 1.000151 the highest and the lowest values of it respectively. The rate of specific growth rate for length was 0.3616 and 0.44866 cm/day% for carp and tilapia respectively. While the specific growth rates for weight were higher than the comparable one for length and were 1.3489 g/day% for carp and 1.6085 g/day% for tilapia.

Design and implementation of a recirculating aquaculture system for research purposes in Marine science center, university of Basrah- IRAQ

mustafa A. Al-Mukhtar; malik H. Ali; Arafat R. Ahmed; S. H. Sabir

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 55-65

The design and implementation a recirculating aquaculture system was discussed, which is considered to be the first of its kind at Iraqi universities and research centers that specialize in aquaculture. The system was designed based on standard specifications and built from materials available in local markets. The system consists of 16 fiberglass tanks (each measuring approximately 75×75×45 cm with a capacity of roughly 250 L). We showed that the new system maintained appropriate environmental conditions for aquatic organisms during the trial period. Moreover, this type of rearing system aids in water conservation and keep on controlled experiment condition.

Seasonal variations of the Cladocerans in the Shatt Al-Arab River, Southern Iraq

Mohammed F. Abbas; Shaker G. Ajeel

Iraqi Journal of Aquaculture, Volume 13, Issue 1, Pages 66-85

Samples were collected seasonally from three stations (Al-Ashar, Abu Al-Khasib and Al-Faw) in the Shatt Al-Arab River by a plankton net (85 μm mesh-size and 40 cm mouth aperture), from January to November 2013. Some physical and chemical parameters of the water were monitored such as, water temperature, salinity, pH, dissolved oxygen, Total Dissolved Solids (TDS) and turbidity. The density of Cladocera ranged between 0.0 ind/m3 during spring and summer at Al-Faw station to 18922 ind/m3 during summer at Al-Ashar station. Five, two and one species of Cladocera were recorded at the three stations, respectively. Moina affinis and Diaphanosoma brachyurum were the dominant species at study area. Maximum diversity index (H) (0.7) was obtained at stations 1 and 2 during winter and spring respectively and higher evenness value (J) (0.4) was recorded at station 1 and 2 during winter, while higher richness (D) (6.1) was obtained at station 1 during winter and lowest value (0.0) at station 3. Jaccard׳s index revealed higher similarity between stations 1 & 2 and lower values between station 1 and 3.