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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.


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.

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