Yeşilbaş Ördeklerde (Anas platyrhynchos) Glandula Uropygialis’in Makroanatomik ve Histolojik Özellikleri

Abstract

Bu çalışma, erişkin erkek ve dişi yeşilbaş ördeklerde (Anas platyrhynchos) glandula uropygialis’in anatomik, topografik ve histolojik özelliklerini araştırmak amacıyla yapıldı. Çalışmada on yetişkin yeşilbaş ördek (5 erkek, 5 dişi) materyali kullanıldı. Kuyruk bölgesinde yerleşen glandula uropygialis’ler önce topografik olarak incelendi. Ardından diseksiyonları yapılarak morfolojik ve histolojik yapıları belirlendi. Bezin histolojik yapısını belirlemek için alınan doku örnekleri Hematoksilen & Eozin (H&E) ve Masson Trichrome ile boyandı. Yapılan incelemelerde glandula uropygialis’in son kuyruk omurları düzeyinde yerleşen “V” şeklinde bir yapı olduğu belirlendi. Morfometrik incelemelerde bezin ağırlığı erkeklerde ortalama 5.10±0.22 g, dişilerde ise 4.02±0.26 g bulundu. Relatif bez ağırlığı erkek bireylerde ortalama 0.31±0.01, dişlerde ise 0.28±0.01 olarak tespit edildi. Erkek ve dişiler arasında glandula uropygialis genişliği, glandula uropygialis yüksekliği, papilla uropygialis uzunluğu, papilla uropygialis yüksekliği ve tüy uzunluğu parametrelerinde fark olmadığı (P<0.05), glandula uropygialis ağırlığı ve uzunluğu parametrelerinde ise istatistiksel olarak anlamlı farklar bulunduğu tespit edildi (P>0.05). Histolojik incelemede bezin kapsülle çevrili iki lobdan oluştuğu gözlendi. Her bir lob merkezde boşaltıcı bir kanal etrafında çevrelenmiş tubuler yapıda bezler içeriyordu. Bezler şekil ve hücre yapısı bakımından üç farklı bölgeden oluşmaktaydı. Bezi oluşturan hücreler de şekil ve kalınlık bakımından bazal, intermediyer, sekretorik ve dejeneratif hücre tiplerine ayrılmıştı. Glandula uropygialis’in genel histolojik yapısı diğer kuşların anatomik ve histolojik özelliklerine benzerdi. Çalışmanın sonuçları, yeşilbaş ördeklerde glandula uropygialis'in genel yapısında bazı türlere özgü farklılıklar gözlense de diğer kuş türlerine benzer olduğunu göstermiştir.

Keywords

• Glandula uropygialis,Yeşilbaş ördek,Anatomi,Histoloji

Macroanatomical and Histological Features of Uropygial Gland in Mallard Ducks (Anas platyrhynchos)

Abstract

This study was carried out in order to examine the anatomical, topographical and histological features of glandula urpygialis in male and female mallards (Anas platyrhynchos). In the study ten adult mallards (five males and five females) were used. The topographical localisation of the glandula uropygialis was examined. Afterwards morphological and histological structure of the dissected gland was assessed. Histological structure of the gland was examined using tissue samples stained with Hematoxylene & Eosin (H&E) and Masson Trichrome. The gland was detected to localize at the level of the last caudal vertebrae and have a “V” shape. Morphometric examination revealed that the mean weight of the gland was 5.10±0.22 g and 4.02±0.26 in males and females respectively. The relative gland weight (gland weight/body weigth) was found 0.31±0.01 and 0.28±0.01 in males and females respectively. There was no significant differences with respect to width and height of the glandula uropygialis, papilla length and height and feather legth (P<0.05) parameters, while statistically significant differences were found with respect to gland weight and gland length parameters between males and females (P>0.05). In the histological examination the gland was observed consisted of two lobes surrounded within a capsule. Each lobe contained tubular glands localized around a central excretion duct. The glands were composed of three distinct region with respect to form and cellular structure. Three distinct types of cells constructiong the gland were observed which were classified as intermediary, secretoric and degenerative. The results of the study indicated that the general structure of the glandula uropygialis in the mallard was similar to those in other bird species although certain species specific differences were observed.

Keywords

• Uropygial gland,Mallard duck,Anatomy,Histology

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