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The Effect of Eyestalk Ablation on Moulting and Ovarian Maturation in The Green Tiger Prawn, PenaeusSemisulcatus De Haan,1844

تأثير استئصال السويقة العينية في الانسلاخ و نضوج المبايض عند جمبري النمر الأخضر PenaeussemisulcatusDe Haan, 1844

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 Publication date 2015
and research's language is العربية
 Created by Shamra Editor




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This researchwas conducted for the first time in Syria in order to studytheeffect of eyestalk ablation on moulting and ovarian maturation in PenaeusSemisulcatusas on essential step in most shrimp hatcheries . 12 females 15,5-17,5 cm and 6 adult males with a length of 14-16 cm were colectedat the sublittoal zone of city Jableh during the period from the beginning of the month of April 2012 until the end of June 2013. Eyestalks for 6 females were ablated while other females were left as control, and females were gathered with males by 2 : 1 in 150 L- tank connected to the basin 's filtering, controlled temperature range between 27-29 co and 38 ‰ salinity and oxygen dissolved 4 mg / l , Animals were fed individual once daily at a rate of 12 % of body weight with stuffed squid and shrimp. the study showed that all femaleswith eyestalk ablation were molted during the period of 2-6 days, the ovaries of five females began activeand one of female died, while females withnon of eyestalk ablation over a period of 8-20 days and ovaries oftwoof them showed development.


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Research summary
تتناول هذه الدراسة تأثير استئصال السويقة العينية على عملية الانسلاخ ونضوج المبايض عند جمبري النمر الأخضر Penaeus semisulcatus. تم انتقاء 12 أنثى و6 ذكور من منطقة تحت الشاطئ بمدينة جبلة، وتم تقسيم الإناث إلى مجموعتين: مجموعة تم استئصال السويقة العينية لها، وأخرى بقيت كعينة شاهدة. أظهرت النتائج أن الإناث المستأصلة السويقة انسلخت خلال فترة قصيرة (2-6 أيام) وبدأت مبايضها بالتطور، بينما استغرقت الإناث الشاهدة فترة أطول (8-20 يوماً) لتنسلخ وتطورت مبايض اثنتين فقط منها. الدراسة تشير إلى أن استئصال السويقة العينية يسرع من عملية الانسلاخ ونضوج المبايض، ولكن قد يؤدي إلى نفوق بعض الإناث بنسبة 6.6%. توصي الدراسة بإنشاء مزارع بحثية قريبة من البحر لمواصلة دراسة هذا النوع والأنواع الاقتصادية الأخرى.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال استزراع الجمبري في سورية، حيث تقدم معلومات قيمة حول تأثير استئصال السويقة العينية على نضوج المبايض. ومع ذلك، يمكن توجيه بعض النقد البناء للدراسة. أولاً، العينة المستخدمة صغيرة نسبياً مما قد يؤثر على تعميم النتائج. ثانياً، لم يتم التطرق بشكل كافٍ إلى الآثار البيئية المحتملة لاستئصال السويقة العينية على الجمبري. ثالثاً، كان من الممكن تحسين تصميم التجربة بإضافة مجموعات تحكم إضافية لتقليل التباين في النتائج. وأخيراً، يجب إجراء دراسات مستقبلية تشمل أنواعاً أخرى من الجمبري لتأكيد النتائج وتوسيع نطاق التطبيق.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو تحديد تأثير استئصال السويقة العينية على عملية الانسلاخ ونضوج المبايض عند جمبري النمر الأخضر Penaeus semisulcatus.

  2. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    النتائج الرئيسية تشير إلى أن استئصال السويقة العينية يسرع من عملية الانسلاخ ونضوج المبايض، حيث انسلخت الإناث المستأصلة السويقة خلال فترة قصيرة (2-6 أيام) وبدأت مبايضها بالتطور، بينما استغرقت الإناث الشاهدة فترة أطول (8-20 يوماً) لتنسلخ وتطورت مبايض اثنتين فقط منها.

  3. ما هي التوصيات التي قدمتها الدراسة؟

    توصي الدراسة بإنشاء مزارع بحثية قريبة من البحر لمواصلة دراسة هذا النوع والأنواع الاقتصادية الأخرى، وذلك بوصفه مقدمة لإقامة أحواض تفريخ على المستوى التجاري.

  4. ما هي نسبة النفوق بين الإناث المستأصلة السويقة العينية؟

    نسبة النفوق بين الإناث المستأصلة السويقة العينية بلغت 6.6%.


References used
ABDEL RAZEK, F. Contribution to the biology of penaeid prawns of the Mediterranean coast of Egypt. Maturation and spawing.J, Egypt, Vet. Med. Ass., 1985,45 (2): 17-28
ABDEL RAZEK F; EL-SHERIEF, S; TAHA .S; AND MUHAMAD, E.G. Some biological studies of parapenaeuslongirostris (Lucas, 1846) (Crustacea, Decapoda) in the Mediterranean coast of Egypt. Egyptian journal of aquatic research, 32 (1) 2006, 385-400
AKTAŞ, M., KUMLU, M. Gonadal Maturation and Spawning of Penaeussemisulcatus (Penaeidae: Decapoda). Turk J. Biol.vol 23,1999, 61-66
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