The social media network FacebookTM was used to gather information on the occurrence and geographical distribution of dusky grouper dermatitis, a skin lesion affecting the dusky grouper, Epinephelus marginatus. Dusky grouper are common targets for spear fishermen in the Mediterranean and by monitoring spearfishing activity in Libyan waters, it was possible to document skin lesions from their entries on Facebook. Thirty-two Facebook accounts and 8 Facebook groups posting from 23 Libyan coastal cities provided a retrospective observational data set comprising a total of 382 images of dusky grouper caught by spearfishing between December 2011 and December 2015. Skin lesions were observable on 57/362 fish, for which images were of sufficient quality for analysis, giving a minimal prevalence for lesions of 15.75%. Only dusky grouper exceeding an estimated 40 cm total length exhibited lesions. The ability to collect useful data about the occurrence and geographical distribution of pathological conditions affecting wild fish using social media networks demonstrates their potential utility as a tool to support epidemiological studies and monitor the health of populations of aquatic animals. To our knowledge, this represents the first time that such an approach has been applied for assessing health in a wild population of fish. arabic 29 English 133
Jamila Rizgalla(1-2016)

The social media network Facebook™ was used to gather information on the occurrence and geographical distribution of dusky grouper dermatitis, a skin lesion affecting the dusky grouper, Epinephelus marginatus. Dusky grouper are common targets for spear fishermen in the Mediterranean and by monitoring spearfishing activity in Libyan waters, it was possible to document skin lesions from their entries on Facebook. Thirty-two Facebook accounts and 8 Facebook groups posting from 23 Libyan coastal cities provided a retrospective observational data set comprising a total of 382 images of dusky grouper caught by spearfishing between December 2011 and December 2015. Skin lesions were observable on 57/362 fish, for which images were of sufficient quality for analysis, giving a minimal prevalence for lesions of 15.75%. Only dusky grouper exceeding an estimated 40 cm total length exhibited lesions. The ability to collect useful data about the occurrence and geographical distribution of pathological conditions affecting wild fish using social media networks demonstrates their potential utility as a tool to support epidemiological studies and monitor the health of populations of aquatic animals. To our knowledge, this represents the first time that such an approach has been applied for assessing health in a wild population
Jamila taher ahmed rizgalla(1-2017)

تم تجميع 235 عينة من النوعين منها 128من النوع Trachurus trachurusو107 منTrachurus mediterraneus من الساحل الغربي الممتد من ساحل مدينة صرمان شرقاً إلى رأس أجدير غرباً ودرس محتوى المعدة والنشاط الغذائي باستخدام مؤشر الأهمية النسبية ومعامل الانفراغ و قياس معامل الحالة الغذائية خلال فصلي الشتاء والربيع ،وجد أن النوع T. trachurus يتغذى على القشريات (shrimp , isopoda) و يرقة Megalop larvae و الديدان الحلقية (polychaeta)، اما النوع T.mediterraneus يتغذى على Teleostei،و القشريات و يرقاتها Shirmp,Isopoda,megalop larvae) ) , كان الغذاء الرئيسي للنوعين القشريات والغذاء العرضي الديدان متعددة الأشواك ، كما أن نشاط التغذية ونوع الغذاء يتأثر بتغير الفصل .
هالة محمد الاسود(12-2021)