Irak, Musul'daki Yetişkin Insectivor Yarasanın (Pipistrellus kuhlii) Göz Yapılarının Morfolojik ve Histolojik İncelemesi

Öz

Farklı organizmaların göz anatomisinin incelenmesi, evrimsel stratejileri ve adaptasyonları hakkında önemli bilgiler sunmaktadır. Bu çalışma, Irak’ın Musul bölgesinde yaygın olarak bulunan bir yarasa türü olan Pipistrellus kuhlii'nin göz yapısının incelenmesine odaklanmaktadır. Araştırmamız, bu yarasanın görsel sistemini çevresel nişine nasıl uyarladığını anlamaya katkı sağlamayı amaçlamaktadır. 5.5 - 6 gram ağırlığında 12 yetişkin yarasa canlı olarak yakalanmıştır. Yarasalara anestezi uygulanmış ve gözler yuvadan çıkarılarak %10 formaldehit içinde muhafaza edilmiştir, ardından histolojik analiz süreci gerçekleştirilmiştir. Bu çalışma, ilk olarak Pipistrellus kuhlii’nin gözünün, düşük ışık koşullarında etkili avlanmaya kesinlikle bağlı olan oldukça gelişmiş adaptasyonlara sahip olduğunu göstermiştir. Retina yapısı, katlanma olmadan, düşük ışık için yüksek yoğunlukta çubuk hücrelerine sahip olup, gece aktiviteleri sırasında av takibi için de özelleşmiştir. İkinci olarak, renkli görme ile ilgili fotoreseptör hücrelerinin (koniler) oldukça farklı bir düzeni ortaya konmuştur. Bu bulgular, yarasaların renkli görmelerinin çok sınırlı olduğu yönündeki genel fikirleri sorgulayacaktır. Şüphesiz, mevcut araştırma, uçan memelilerin karmaşık görsel ayarlamaları hakkında faydalı bilgiler sunabilir ve yarasa görmesi hakkındaki anlayışımızı artırabilir.

Anahtar Kelimeler

• Pipistrellus kuhlii
• yarasa görmesi
• göz yapısı
• uçan memeliler
• avlanma adaptasyonları

Morphological and Histological Investigation of the Ocular Structures in the Adult Insectivorous Bat (Pipistrellus kuhlii) in Nineveh, Iraq

Öz

Studying the anatomy of the eye in different organisms offers considerable insights into their evolutionary strategies and adaptations. The present work focuses on the examination of the ocular structure in Pipistrellus kuhlii, a common species of bat found in Nineveh, Iraq. Our research aimed to contribute to enhancing the understanding of how this bat has altered its visual system in response to its environmental niche. Twelve adult bats weighing 5.5 - 6g were captured alive. Bats were anesthetized, and eyeballs were enucleated from the orbit, maintained in 10 % formaldehyde, and then the histological analysis process was performed. The present study first indicated that the Pipistrellus kuhlii eye has quite elaborate adaptations, certainly connected with efficient foraging in low light conditions. The retinal structure is specific, with no folding, but features a high density of rod cells for dim light and tracking prey during nocturnal activities. Second, a quite different layout of photoreceptor cells (cones) concerning color vision. These findings would challenge the general idea that bats have very limited color vision. The current research may offer useful information on the complex visual adjustments of flying mammals and increase our understanding of bats' vision.

Anahtar Kelimeler

• Pipistrellus kuhlii
• bat vision
• eye structure
• foraging Adaptations
• flying mammals

Kaynakça

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