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Register a new userAcclimation Trial of Liza aurata Fingerlings To Fresh Water and To a Low Water Salinity
أقلمة اصبعيات البوري دهبان (Liza aurata) للمياه العذبة و لدرجة ملوحة منخفضة
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كاترين منصور( باحث )
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تم إجراء البحث لدراسة مدى تأثير الأقلمة الفورية و المتدرجة للمياه العذبة و كذلك الأقلمة المتدرجة عند درجة ملوحة 3‰ على معاملات النمو عند اصبعيات البوري دهبان التي تم جمعها مباشرة من البحر و بعد استراحة قصيرة قمنا بتوزيع الاصبعيات الى أحواض زجاجية سعتها 100 ليتر و بمعدل 30 إصبعية لكل حوض. تم أقلمة اصبعيات الحوض الأول بشكل فوري مباشر للمياه العذبة, بينما أقلمت اصبعيات الحوض الثاني تدريجيا" للمياه العذبة, أما اصبعيات الحوض الثالث فتم أقلمتها بشكل تدريجي لدرجة ملوحة مختارة (3‰) و تركت اصبعيات الحوض الرابع كشاهد في مياه البحر. تم تغذية الاصبعيات بعليقه تحوي 35 % بروتين و 500 كح/100 غ عليقة بمعدل مرتين في اليوم حتى الشبع لمدة 75.يوما".
This study was conducted to investigate the effect of abrupt and gradual acclimation of Liza aurata fingerlings to fresh water and gradual acclimation to a selected salinity 3‰. L.aurata fingerlings were collected directly from the sea and duplicate groups of 30 fingerlings were distributed after rest to glass aquaria (100 liter capacity). The first group was acclimated abruptly to fresh water, the second gradually to fresh water, the third was acclimated gradually to 3‰ and the last group was left as control in sea water. The fingerlings were fed artificial diet (35% protein and 500 kcal GE/100g), twice a day to satiation for 75 days.
Artificial intelligence review:
Research summary
تتناول هذه الدراسة تأثير الأقلمة الفورية والمتدرجة لإصبعيات البوري دهبان (Liza aurata) على المياه العذبة ودرجة ملوحة منخفضة (3‰). تم جمع الإصبعيات من البحر وتوزيعها على أربعة أحواض زجاجية. الحوض الأول تم أقلمته مباشرة للمياه العذبة، الثاني تدريجياً للمياه العذبة، الثالث تدريجياً لدرجة ملوحة 3‰، والرابع ترك كشاهد في مياه البحر. تم تغذية الإصبعيات بعليقة تحتوي على 35% بروتين لمدة 75 يوماً. أظهرت النتائج أن الإصبعيات في الحوضين الأول والثاني نفقت تدريجياً، بينما بقيت الإصبعيات في الحوض الثالث على قيد الحياة حتى نهاية التجربة، وأظهرت معدلات نمو وكفاءة تحويل غذائي مشابهة لتلك التي في مياه البحر.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في فهم تأثير الملوحة على نمو وكفاءة تغذية إصبعيات البوري دهبان. ومع ذلك، يمكن توجيه بعض النقد البنّاء لتحسين الدراسات المستقبلية. أولاً، كان من الممكن توسيع نطاق الدراسة لتشمل درجات ملوحة مختلفة بين 0‰ و3‰ لتحديد النقطة الحرجة بدقة أكبر. ثانياً، لم تتناول الدراسة تأثير العوامل البيئية الأخرى مثل درجة الحرارة ومستويات الأكسجين بشكل مفصل، مما قد يؤثر على النتائج. أخيراً، كان من الممكن استخدام عدد أكبر من الإصبعيات في كل مجموعة لتحسين دقة النتائج وتقليل تأثير التباين الفردي.
Questions related to the research
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ما هو الهدف الرئيسي من هذه الدراسة؟
الهدف الرئيسي هو دراسة تأثير الأقلمة الفورية والمتدرجة لإصبعيات البوري دهبان على المياه العذبة ودرجة ملوحة منخفضة (3‰) على معدلات النمو وكفاءة التغذية.
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ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟
النتائج الرئيسية هي أن الإصبعيات التي أقلمت للمياه العذبة نفقت تدريجياً، بينما الإصبعيات التي أقلمت لدرجة ملوحة 3‰ بقيت على قيد الحياة وأظهرت معدلات نمو وكفاءة تغذية مشابهة لتلك التي في مياه البحر.
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ما هي التوصيات التي قدمتها الدراسة؟
أوصت الدراسة بإجراء مزيد من الأبحاث لتحديد النقطة الحرجة للملوحة بدقة أكبر ولتحقيق فهم أفضل لتأثير العوامل البيئية الأخرى على نمو وكفاءة تغذية إصبعيات البوري دهبان.
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ما هي العوامل التي لم تتناولها الدراسة بشكل مفصل؟
لم تتناول الدراسة بشكل مفصل تأثير العوامل البيئية الأخرى مثل درجة الحرارة ومستويات الأكسجين على نمو وكفاءة تغذية إصبعيات البوري دهبان.
References used
Agiragac,G. and Kalma,M. A research on the growth rate on the mullet (Mugil auratus Risso, 1810) fingerlings fed different diets in cages (in Turkish). Tr.J. of veterinary and animal sciences, Vol.23, No.4, 1998, 751-755
Altun,T.D. Effect of testosterneundeconoate on growth of Golden Grey Mullet (Mugil aurata, Risso, 1810) in fresh water. The 7Th Balkan Conference on Operational Research, Constanta, May, 2005, Romania, 573
Atay,D. Sea fish and culture procedure (II. Press) (in Turkish). Publication number of fisheries department of Agricultural Faculty, University of Ankara, Vol.329, 1994, 316
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