Morphological and histological analysis of the Uropygial Gland in Barn owls (Tyto alba)

Yilmaz, Bestami; Yılmaz, Remzi

doi:10.30782/jrvm.813008

Journal of Research in Veterinary Medicine

2020

DOI: 10.30782/jrvm.813008

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Morphological and histological analysis of the Uropygial Gland in Barn owls (Tyto alba)

Bestami Yilmaz

Remzi Yılmaz

Abstract: Glandula uropygialis (uropygial bez), kuşlarda derinin holokrin yapıda bir yağ bezidir. Bu çalışma erkek peçeli baykuşlarda (Tyto alba) uropygial bezin morfolojik ve histolojik yapısını belirlemek amacıyla yapıldı. Çalışmada erişkin yaşta 4 adet erkek peçeli baykuş materyali kullanıldı. Kuşların kuyruk bölgesinde yer alan bezler diseke edilerek vücuttan ayrıldı. Bezlerin morfometrik incelemeleri yapıldı. Bezin histolojik yapısını ortaya koyabilmek amacıyla doku kesitleri Hematoksilen & Eozin (H&amp… Show more

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2024

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Cited by 3 publications

References 27 publications

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Morphometric, macroscopic and microscopic investigation of glandulae uropygiale in turkeys (Meleagris gallopavo)

İşbilir,

Özgüden Akkoç,

İşbilir

et al. 2024

Microscopy Res & Technique

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This study was carried out to investigate the macroanatomical, morphometric, histological, and electron microscopic characteristics of the uropygial gland in adult male and female turkeys (Meleagris gallopavo). The glandula uropygialis of 13 adult turkeys (6 males and 7 females) were used for this study. It was determined that this glandular structure located dorsal to the last caudal vertebrae was heart‐shaped and consisted of two lobes and a papilla system. As a result of statistical evaluation, significant differences were found between the sexes in the parameters of lobe length, papilla width and papilla height (p < .05). Also, papilla uropygialis index (PUI) value had a statistically significant difference (p < .05). Tissue samples taken to determine the histological structure of the gland were stained with Hematoxylin & Eosin, Crossman's triple, periodic acid Schiff (PAS), diastase, and orcein. Histological examination revealed that the gland had a two‐lobed structure surrounded by a capsule composed of connective tissue. It was determined that the gland had a tubular structure and the epithelial layer consisted of cellular layers as a germinative layer, intermediate layer, secretory layer, and degenerative layer from the periphery to center. In the scanning electron microscope examination, the lobe structure of the gland consisted of different shaped follicles protruding from the surface. It was observed that these glandular follicle structures were gathered together in different ways or mostly disorganized. As a result of the study, it was determined that the morphological and histological structure of the uropygial gland in turkeys was similar to that of other bird species, but showed some species‐specific and habitat‐dependent differences in general. ArıcanResearch Highlights The uropygial gland consisted of a system of two lobes and one papilla in each of male and female turkeys. The glandular lobes consisted of follicles surrounded by connective tissue, while the follicles were connected to each other by interfollicular septae. The results obtained in morphometric measurements revealed statistical differences between male and female birds. Histological examination showed periodic acid Schiff (PAS) (+) reaction in the basal membranes of tubule epithelial cells and secretion. Lymphoid cell communities were found in both connective tissue and intertubular regions. The fact that the reaction was not glycogen‐induced was determined by the observation of PAS positivity as a result of staining with the PAS‐diastase technique.

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Morphometric, macroscopic and microscopic investigation of glandulae uropygiale in turkeys (Meleagris gallopavo)

İşbilir,

Özgüden Akkoç,

İşbilir

et al. 2024

Microscopy Res & Technique

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Exploring the morphology of the glandula uropygialis in Denizli rooster: 3 tesla MRI and histological investigation

Batur,

Kutlu,

Bakıcı

et al. 2024

Veteriner Hekimler Derneği Dergisi

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The aim of this study was to examine the preen gland (uropygial gland) of Denizli rooster, an endemic species for Turkey, both macroscopic and by magnetic resonance imaging and to present its histological formation. Five adult male subjects were used for this study. Although some of the findings of the preen gland in Denizli rooster were quite similar to the previous studies on the various avian species, widely branching secondary sinuses of the both two lobes of the gland were formed different from those. It was observed that the sinuses of these two lobes were connected to each other by forming passageway at the isthmus region of the gland. MR images showed bright white hyper-echoic features due to high fat secretion of the preen gland. Therefore, it was determined that the preen gland could be easily isolated from the surrounding tissues. It was also observed in the MR images that the gland in the Denizli cock has a pair of symmetrical bilateral lobes and is located on both sides. This connection gave rise to thought that the problems occurred by the blockage of the one of the primary canals can be solved by the compensation of another canal connected through this passageway. Thus, the secretion of the gland could be maintained properly.

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Macroscopic and microscopic characteristics of uropygial gland of budgerigars (Melopsittacus undulatus)

İşbilir,

Avcı Küpeli,

İşbilir

et al. 2024

Turkish Journal of Veterinary Research

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Objective: This study was carried out to investigate the anatomical, morphometric, topographic, and histological features of the uropygial gland in adult male and female budgerigars (Melopsittacus undulatus). Material-Method: For this study, the glandula uropygialis of fourteen adult budgerigars (7 male, 7 female) were used in the study. This glandular structure located between the caudal vertebrae and pygostyle was removed by careful dissection. Morphological and histological characteristics of the dissected glandula uropygialis were determined. In addition, morphometric measurements and index calculations were performed. Tissue samples taken to determine the histological structure of the gland were stained with Hematoxylin & Eosin (H&E), Masson Trichrome's and Periodic Acid Schiff-Alcian Blue. Result: In the study, it was determined that the gland structure was heart shaped and consisted of two lobes, a papilla and a draining duct system. Uropygial gland weight was determined as 1.57±0.96 g in male birds and 1.52±0.09 g in female birds. As a result of the statistical evaluation, there were significant differences between the sexes in the parameters of lobe width (P

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Morphological and histological analysis of the Uropygial Gland in Barn owls (Tyto alba)

Cited by 3 publications

References 27 publications

Morphometric, macroscopic and microscopic investigation of glandulae uropygiale in turkeys (Meleagris gallopavo)

Morphometric, macroscopic and microscopic investigation of glandulae uropygiale in turkeys (Meleagris gallopavo)

Exploring the morphology of the glandula uropygialis in Denizli rooster: 3 tesla MRI and histological investigation

Macroscopic and microscopic characteristics of uropygial gland of budgerigars (Melopsittacus undulatus)

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