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An assessment study of growth performance and gonads development of mono sex nile tilapia in different age stages during the production period
العناوين الأخرى
دراسة تقييمية لأداء النمو و تطور الغدد التناسلية للبلطي النيلي آحادي الجنس في المراحل العمرية المختلفة خلال فترة الإنتاج
المؤلفون المشاركون
Uthman, Muhammad Fathi
Amir, Muhammad Abd al-Baqi
al-Nahal, Sarah Shahat
Ali, Tariq Abu al-Makarim
المصدر
Arab Universities Journal of Agricultural Sciences
الناشر
تاريخ النشر
2019-03-31
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الموضوعات
الملخص الإنجليزي
The objective of this study was to follow up the growth performance and gonads development of sex reversed male Nile tilapia.
Fish fed commercial diet contained 30% crude protein at a rate of 3% of the biomass and 10 fish were randomly taken biweekly during the experimental period (16 weeks).
Growth performance, feed utilization and survival rate were calculated.
Histological examination of the gonads was done every two weeks to follow the growth and development of the gonads.
Results showed positive interactions between growth parameters and reproductive development during different periods of fish productive cycle.
Histological examination illustrated that during early ages, testicular sections of mono sex male's tilapia had abnormal architecture with deterioration of germinative tissue.
Despite abnormal testis texture, fish started spermatogenesis, a step toward puberty when their body weight reached 29.16g.
As fish reached 4-5 months, male start to recover their testes normal structures and at age of 5.5-6 months, testicular sections appeared normally as pointed out by firmed testicular lobules, existence of all germ cell types and the intensively stored spermatozoa in testicular lumen and testicular ducts, confirming the full maturity of males.
Based on the obtained results, it can clearly conclude that there is a relationship between age, body weight and development of sexual glands.
It has also been shown that the hormonal treatment of tilapia seeds in the early stages for production of mono sex (all males) leads to a marked deterioration in the testes structure, continues near the fish enters the sexual maturity.
At a later age, males can overcome this deterioration, restore the histological
structure of the testes and achieve full sexual maturity at the age around from 5.5 to 6 months.
نوع البيانات
أوراق مؤتمرات
رقم السجل
BIM-999827
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
al-Nahal, Sarah Shahat& Amir, Muhammad Abd al-Baqi& Uthman, Muhammad Fathi& Ali, Tariq Abu al-Makarim. 2019-03-31. An assessment study of growth performance and gonads development of mono sex nile tilapia in different age stages during the production period. . Vol. 27, no. 1 (s) (2019), pp.395-404.Cairo Egypt : Ain Shams University Faculty of Agriculture.
https://search.emarefa.net/detail/BIM-999827
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
al-Nahal, Sarah Shahat…[et al.]. An assessment study of growth performance and gonads development of mono sex nile tilapia in different age stages during the production period. . Cairo Egypt : Ain Shams University Faculty of Agriculture. 2019-03-31.
https://search.emarefa.net/detail/BIM-999827
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
al-Nahal, Sarah Shahat& Amir, Muhammad Abd al-Baqi& Uthman, Muhammad Fathi& Ali, Tariq Abu al-Makarim. An assessment study of growth performance and gonads development of mono sex nile tilapia in different age stages during the production period. .
https://search.emarefa.net/detail/BIM-999827
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر
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