Some Aspects of The biology of Black Spot Sea Bream, Pagellus bogaraveo (Brunnich, 1768) in Umm al-Rizam Coast,  Eastern Libya

عزالنصر عاشور أبزيو

doi:10.59743/jmset.v6i1.48

المؤلفون

عزالنصر عاشور أبزيو قسم الغابات والمراعي، كلية الموارد الطبيعية وعلوم البيئة، جامعة عمر المختار، درنة، ليبيا.

DOI:

https://doi.org/10.59743/jmset.v6i1.48

الكلمات المفتاحية:

الخصائص البيولوجية، سمكة المرجان ذو النقطة السوداء، ساحل ام مرزم، درنة، البحر الأبيض المتوسط، ليبيا

الملخص

تم جميع عينات شهرية حوالي 600 عينه اسماك من سمكة المرجان ذو النقطة السوداء من الصيادين لساحل ام مرزم شرق ليبيا المطل على البحر المتوسط خلال عام 2009، حيث كان معدل الطول الكلي لدي الاسماك يتراوح طولها ما بين 16.5– 38.4 سم، وتم دراسة العلاقة بين الاطوال والأوزان وكانت العلاقة مثالية النمو حيث ان قيمة α= 0.008 و b= 3.0993. وبدراسة الشق الجنسي للأسماك وجد أن الاناث هي السائدة طوال شهور التجميع خصوصا في شهور التكاثر، وكان الشق الجنسي العام بنسبة 1: 1.45، وبأوزان تتراوح ما بين 68.5– 401.8 جم. والسمكة كان لها قائمة غذائية كبيره تتكون من صغار الاسماك العظمية (41.2%) والرخويات من أحاديات وثنائيات المصرع (22.9%) والقشريات من الجمبري والكابوريا (20.1%) والديدان عديدة الاشواك (7.5%) والطحالب الخضراء (4.4%) والجلد شوكيات من نجوم البحر (3.9%)، وكانت السمكة شديدة الاغتذاء في الصيف والخريف.

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