Osman ÖZEL, İsa COŞKUN, Eyüp ÇAKMAK, Recayi CİMAGİL

Histomorphological Study on the Pyloric Caeca and Intestine of Black Sea Trout (Salmo labrax Pallas, 1814)

This study was conducted to determine about the histomorphology of anterior, middle and posterior intestines and pyloric caeca of fifth-generation Black Sea trout (Salmo labrax Pallas, 1814). The adult Black Sea trout were 29 month age and averagely weighted 1106.9±73.88g. Pyloric caeca and intestine tissue of twenty fish were taken in seawater. Intestine was divided into three sections: anterior, middle and posterior. Pyloric caeca and intestine had four layers from the inside to outside: mucosa, submucosa, muscularis and serosa. Muscularis was gradually decreased from the beginning of the anterior intestine to the end of the posterior intestine. While pyloric caeca had the lowest muscularis, anterior intestine had the highest muscularis. The highest villi length was obtained in middle 1, and also posterior intestine had two types of villi as simple and complex villi. Simple villi had lower villi length and fewer villi number. Complex villi, branched out along the intestine, contained a large of simple villi. As a result, the histomorphological structure of the midgut section of the adult Black Sea trout shown an alteration section by section.

Karadeniz Alabalığı (Salmo labrax Pallas, 1814)’nın Pilorik Kese ve Bağırsak Dokusu Üzerine Histomorfolojik Çalışma

Bu çalışma beşinci nesil Karadeniz alabalığı (Salmo labrax Pallas, 1814)’nın ön, orta ve arka bağırsak ile pilorik kesenin histomorfolojisinin belirlenmesi amacıyla yapılmıştır. Çalışmada kullanılan Karadeniz alabalıkları 29 aylık ve ortalama 1106,9±73,88g ağırlığa sahipti. Balıklar deniz suyunda iken, 20 adet balığın pilorik kese ve bağırsak dokusu alındı. Pilorik kese tek parça olarak, bağırsak üç bölgeye ayrılarak incelendi: ön, orta ve arka. Elde edilen sonuçlara göre, pilorik kese ve bağırsak içten dışa doğru dört tabakaya sahipti: mukoza, altmukoza, muskularis ve serosa. Muskularis ön bağırsağın başlangıcından arka bağırsağın ucuna kadar kademeli olarak azaldığı tespit edildi. Pilorik kese en ince muskularis tabakasına sahipke, ön bağırsak en kalın muskularis tabakasına sahipti. En yüksek villi uzunluğu orta bağırsağın başlangıç kısmında görüldü. Ayrıca, arka bağırsak basit ve karmaşık olmak üzere iki tip villiye sahipti. Basit villi daha düşük villi uzunluğuna ve daha az sayıda villiye sahipti. Karmaşık villi ise bağırsağın lumenine doğru dallanmış olup, çok sayıda basit villiye sahipti. Sonuç olarak, yetişkin Karadeniz alabalığının midgut bölgesinin histomorfolojik yapısı bölüm bölüm değişiklik göstermektedir.

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