Natural Feeding and Description of Clausocalanus furcatus Order Calanoida (Copepoda) in the coastal waters of Baniyas City (Eastern Mediterranean)
Wassim Mahmoud Mayya
Kamal Salem Al- Hanoun
Faculty of Sciences || Tishreen University || Syria
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Tab title This study, included the feeding of Clausocalanus furcatus of crustacean zooplankton (Calanoida), by studying the structure of the mandible and the gut content of this previous species to determine their favorite food. 93 samples have been collected vertically in period between March and October 2020. The samples were also accompanied with different hydrophysical and hydrochemical measurements in three regions that differ from each other with their environmental properties. The number of members of (C.furcatus) that were studied reached (64) individuals, of which (44) are female and (20) are male. On the other hand, determining the morphology, studying its structure, and knowing the content of the gut of the aforementioned species helped in expanding knowledge about the conditions and strategies of feeding it under the influence of environmental factors. The number of algae species (phytoplankton) that C.furcatus fed reached (9) species, of which (6) belong to the Dinophyceae, (2) species to Bacillariophyceae earth, and (1) only one species to the group Cryptophyceae. The highest average number of Dinophyceae was (1755), followed by Bacillariophyceae (505) individuals, then the group of Cryptophyceae (189) individuals. Keywords: Natural Feeding, Mandible, Gut Content, Hydrophysical and Hydrochemical Measurements, Feeding Strategies.
Tab title
This study, included the feeding of Clausocalanus furcatus of crustacean zooplankton (Calanoida), by studying the structure of the mandible and the gut content of this previous species to determine their favorite food. 93 samples have been collected vertically in period between March and October 2020. The samples were also accompanied with different hydrophysical and hydrochemical measurements in three regions that differ from each other with their environmental properties. The number of members of (C.furcatus) that were studied reached (64) individuals, of which (44) are female and (20) are male. On the other hand, determining the morphology, studying its structure, and knowing the content of the gut of the aforementioned species helped in expanding knowledge about the conditions and strategies of feeding it under the influence of environmental factors. The number of algae species (phytoplankton) that C.furcatus fed reached (9) species, of which (6) belong to the Dinophyceae, (2) species to Bacillariophyceae earth, and (1) only one species to the group Cryptophyceae. The highest average number of Dinophyceae was (1755), followed by Bacillariophyceae (505) individuals, then the group of Cryptophyceae (189) individuals. Keywords: Natural Feeding, Mandible, Gut Content, Hydrophysical and Hydrochemical Measurements, Feeding Strategies.
التغذية الطبيعية ووصف النوع Clausocalanus furcatus رتبة Cyclopoida (Copepoda) في المياه الشاطئية لمدينة بانياس (شرق المتوسط)
وسيم محمود ميّا
كمال سالم الحنون
كلية العلوم || جامعة تشرين || سوريا
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تضمنت الدراسة الحالية دراسة الطيف الغذائي لنوع من العوالق الحيوانية القشرية من رتبة Cyclopoida وهو النوع Clausocalanus furcatusمن خلال دراسة بنية الفقيم ومحتوى المعي لتحديد الغذاء المفضل للنوع. جمعت 93 عينة عمودياً بشكل مستمر ومتدرج في الفترة الممتدة بين أذار وتشرين الأول 2020، كما ترافق جمع العينات بأخذ قياسات هيدروفيزيائية وهيدروكيميائية من ثلاث مناطق مختلفة عن بعضها البعض بخصائصها البيئية. بلغ عدد أفراد النوع Clausocalanus furcatus المدروسة (64) منها (44) إناث و (20) ذكور. من ناحية أخرى فإن تحديد شكل الفقيم ودراسة بنيته ومعرفة محتوى المعي عند النوع المذكور أعلاه ساعد في اتساع المعارف عن ظروف واستراتيجيات تغذيته تحت تأثير العوامل البيئية المختلفة، بلغ عدد العوالق النباتية التي تغذى عليها النوع Clausocalanus furcatus(9) أنواع، منها (5) من السوطيات ونوعين من المشطورات ونوع واحد من مجموعة Cryptophyceae، كان أعلى متوسط للسوطيات (1755) فرداً، تلتها المشطورات(505) فرداً، ثم مجموعة الـــ Cryptophyceae (189) فرداً. الكلمات المفتاحية: التغذية الطبيعية، الفقيم، محتوى المعي، القياسات الهيدروفيزيائية والهيدروكيميائية، استراتيجية التغذية.