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Article
Impact of Seasonal Variation on The Spermatozoa Reproductive Cycle of Hemantura Walgo (Müller & Henle, 1841) From Iraqi Marine Waters

Author: Noori Abdul-Nabi Nasir
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2019 Volume: 60 Issue: 1 Pages: 29-35
Publisher: Baghdad University جامعة بغداد

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Abstract

The impact of seasonal variation on the spermatozoa reproductive cycle ofHemantura walgo in Western North of Arabian Gulf from January 2016 toDecember 2017 was studied. A total 225 individuals males of H. walga werecollected using beach net. Gonads Somatic index (GSI) was high during May (10.1)and September (9.98) and the lowest values were recorded during on February, Julyand October with their values were 0.85, 1.21 and 1.43 respectively. Mature maleswere noticed during May and September which indicates there are two reproductionperiods for H. walga during the year. The relationship between weight and widthdesk of H. walga was also investigated and generally demonstrated positiveallometric growth (b > 3) for this species Thus, this study supplies to a betterunderstand of seasonal variation on the spermatozoa reproductive cycle of H.walgo. The findings of this study also are essential to the estimation, protection andmanagement of H. walgo , in addition to providing plan for the improvement ofconservation strategies


Article
Feeding Eology of 0-group fishes from Shatt al-Basrah , Basrah/Iraq

Author: Noori Abdul-Nabi Nasir
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2015 Volume: 1 Issue: 4 Pages: 57-66
Publisher: Babylon University جامعة بابل

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Abstract

The food and feeding of four species of the young )0-group) fishes in Shatt al-Basrah were studied from February 2011 to April 2012. Twelve food groups were recorded during this study. Crustaceans (copepods, amphipods, shrimps and crabs) were the most important prey for tilapia (Tilapia zilli) and mosquitofish (Gumbosia affinis) (Relative Importance indices (% RII) = 82.7 and 40.2 respectively). Plant was the most important food for mullet ( Liza subviridis ) (86.8%). Plant and fishes were considered most important food for whitehead's thryssa ( Thryssa white headi ) ( 32.3% and 32.7% of the total RII respectively). Tilapia (T. zilli) clearly shows only significant overlap with (G. affinis ) ( Cλ= 0.76). The overall degree of dietary overlap among all the species was 41.7%. This information is when the complex association between fishes and identifying groups of species using similar resources.


Article
Distribution of silver pomfret ( Pampus argenteus) in Iraqi marine water

Author: Noori Abdul-Nabi Nasir
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2016 Volume: 2 Issue: 4 Pages: 67-77
Publisher: Babylon University جامعة بابل

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Abstract

The fishery and population characteristics of silver pomfret Pampus argenteus (Euphrasen) landed in basrah were studied for the period from 2005 to 2015. The average annual landing of Silver Pomfrets was about 68.273 tonnes, which contributed 2.04% to the annual marine fish landings in Iraq. The total catches of Silver Pomfrets have declined from 378.16 tonnes in 2012 to 27 tonnes in 2015.It is suggested that the fishery stocks of the northern Arabian Gulf are under ecological stress due to high fishing pressure, and to ecological changes in the area.Length frequency data collected suggested that the general size range of Silver pomfrets in Iraq is 65 to 320 mm total length. The size group (138- 208 mm) was the most fish size landed during the period of the study (59%). The landed Silver Pomfrets was dominated by male individuals (73.3%) with maximum size reached 270mm.


Article
Growth development of young common carp Cyprinus carpio through dietary sodium chloride supplementation

Authors: Noori Abdul-Nabi Nasir --- Qusey Hamed
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2016 Volume: 2 Issue: 2 Pages: 12-18
Publisher: Babylon University جامعة بابل

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Abstract

This study was designed to evaluate the growth response of young common carp Cyprinus carpio to dietary salt levels. Five different test diets were prepared as a control diet without added salt, and four diets with 0.5, 1.0, 1.5 and 2.0% added salt. Fish (20.15 ± 0.21 to 20.65 ± 0.64 gm /fish) was randomly distributed into the aquaria at a rate of 12 fish / 40 L . The water temperature was in the region of 27 ± 0.130 °C. Fish were fed either a diet containing 0.5, 1.0, 1.5 and 2.0% sodium chloride with a feeding rate of 3% of life body weight twice daily for 7 days a week for 60 days. No significant difference between the treatments was noticed. The best Final body weight, percent weight gain, and specific growth rate (SGR) were found with 1.5 % salt diet (P<0.05), whereas the lowest growth was gained in 2% salt. Generally, Food conversion ratio (FCR) and food conversion efficiency (FCE) were improved for carp fingerlings fed on diets contain NaCl ranged from 0.1 to 1.5% (P<0.05). The results suggested that dietary supplementation of NaCl influenced the body composition and can be beneficial for the young common carp reared in freshwater used in the fish culture.


Article
Effects of different artificial light colors on the growth of juveniles common carp (Cyprinus carpio)

Authors: Noori Abdul-Nabi Nasir --- Khalid Willaim Farmer
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2017 Volume: 3 Issue: 3 Pages: 79-86
Publisher: Babylon University جامعة بابل

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Abstract

The experiment was carried out to investigate the effects of light colors on growth and survival of juvenile common carp Cyprinus carpio. Five different light colors were tested in triplicates. Juveniles fish were fed to satiation twice a day for 60 days. The fish was significantly affected by light intensity. The survival percentage rate of the fish was also assessed and varied from 40% to 90% at different treatments. The results also showed that growth performance was significantly affected by the light colors. The effect of red light was better than other colors lights , where the red light gave the best fish percentage weight gain (WG = 88.5 %), specific growth rate (SGR = 2.90 %) and daily growth rate (DGR = 12.81 %) . The lowest mean values of feed conversation ratio (FCR = 0.564) was showed in red light while The highest mean values of feed conversation ratio (FCR = 0.603) was found in dark condition. These details can be applied to start steady mass-scale and sustainable farming technology for common carp and will improve the culturing effectiveness of the fish juveniles.


Article
Bioaccumulation of heavy metals concentration in mullet fish (Palaniza abu), waters and sediments from al-hammar marsh, Iraq

Authors: Noori Abdul-Nabi Nasir --- Ghassan Adnan Al- Najare
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2015 Volume: 2 Issue: 1 Pages: 24-32
Publisher: Babylon University جامعة بابل

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Abstract

The present study was carried out to assess the concentrations of some heavy metals in waters, sediments and mullet fish from al-Hammar marsh southern Iraq, which is potentially polluted from industrial, domestic and sewage effluents during the period between September 2010 to August 2011. Concentrations of six heavy metals (copper, cadmium, lead, nickel, magnesium and cobalt were determined on temporal basis in gills, muscles , ovaries, intestine and skin of Palaniza abu species using atomic absorption spectrophotometer. The order of heavy metal concentrations in fish tissues was arranged as follows: intestine > gills > skin > gonads > muscles. The order of heavy metals concentrations in fish tissues on descending trend were found to be Fe > Ni > Cu > Co > Mn > Cd. The heavy metal concentrations in the edible parts of mullet fish were within the acceptable level for human health. The order of heavy metal accumulation in waters was arranged from higher to lower as follow Ni > Fe > Cd > Cu> Co> Mn. However, in sediment was in the rank follow Fe > Mn > Cu > Cd > Co>Ni. The transfer factors of all metals to the fish tissues from water were larger than those from sediments. This led to the conclusion that fish bioaccumulation with these metals came from the water.


Article
Effect of Ph on the Growth and Survival of Juvenile Common Carp (Cyprinus Carpio L.)

Authors: Noori Abdul-Nabi Nasir --- AbdulKareem Taher Yesser --- Qusay Hamid Al-Hamadany
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2019 Volume: 60 Issue: 2 Pages: 234-238
Publisher: Baghdad University جامعة بغداد

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Abstract

Common carp ( Cyprinus carpio L.) juveniles averaging 7.68± 0.25 - 8.12± 1.14 g in weight were used for 6 weeks to investigate their survival and growth preferences. The experimented carp were stocked at 12 tanks formerly adjusted with different pH levels values as: 6.0, 7.0, 8.0 and 9.0. Growth and survival of common carp was assessed every Sunday of each week. Growth rates significantly (P < 0.05 ) increased at pH 7 and pH8 respectively. Therefore, the results suggest that the water with pH ranged from 7 to 8 was the best range for growth performance and survival rate of carp. Feed conversion ratio (FCR) improved at pH 6 and 9 respectively. In general, the results indicated that water pH 7- 8 could be more appropriate to juvenile carp culture for best growth performance and survival rate.

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