141 Berna GÜNEY SARUHAN 1 Hakan SAĞSÖZ 1 M. Aydın KETANİ 1 Nihat TEKEL 2 Deniz ŞİRELİ 2 1 Dicle Üniversitesi Veteriner Fakültesi, Histoloji ve Embriyoloji Anabilim Dalı, Diyarbakır, TÜRKİYE 2 Dicle Üniversitesi Ziraat Fakültesi, Zootekni Bölümü, Diyarbakır, TÜRKİYE Geliş Tarihi : 29.01.2009 Kabul Tarihi : 25.05.2009 The Effect of Different Feedings on Histochemical and Histometric Analysis of Awassi Race Lamb Skin * In sheep breeding, meat, milk and wool yields are sought after and therefore studies are conducted to increase these yields. Our purpose in this study was to reveal histological and histometric changes in hair follicles and skin of Awassi lambs which were subject to different feedings. In the study, 24 male, 2.5 months old, Awassi lambs breeding in the Southern Anatolia Agricultural Research Institute were used as the material. Animals were divided into three groups (1st group feed with only mothers milk, 2nd group feed with milk remaining in the mammary gland after mother’s milk was drawn and 3 rd group feed with mother milk and raw feed ), group containing 8 animals each. Animals were cared and fed for 75 days. Histological and histometric differences between the groups were determined. In conclusion, there was no difference in terms of the distribution of the connective tissue fibers and the density between the groups, for this reason, nutrition is not effective in this aspect. The group to which were given mother milk had the thickest dermis layer and lesser hair follicle; therefore, this may be said to be important in leather industry. Key Words: Hair follicle, histochemistry, lamb, nutrition, skin. Farklı Beslenme Uygulanmış İvesi Irkı Kuzu Derilerinin Histokimyasal ve Histometrik İncelenmesi Koyun yetiştiriciliğinde et, süt ve yapağı verimi ön planda tutulmakta ve bu verimlerin artırılması yönünde çalışmalar sürdürülmektedir. Bu çalışmadaki amacımız, farklı beslenme uygulanmış İvesi ırkı kuzularda deri ve kıl folliküllerindeki histolojik ve histometrik değişimleri ortaya koymaktır. Çalışmada materyal olarak Güneydoğu Anadolu Tarımsal Araştırma Enstitüsünde yetiştirilen 24 adet 2.5 aylık tekiz erkek İvesi kuzular kullanıldı. Hayvanlar her grupta 8 adet olacak şekilde üç gruba ayrıldı ve 75 gün süre ile bakım ve beslenme uygulandı. I. grup sadece anne sütü, II. grup anne sağıldıktan sonra memede kalan sütle, III. Grup ise anne sütü ile beraber kaba yem ile beslenmiştir. Deri ve kıl foliküllerindeki histolojik ve histometrik farklılıklar belirlendi. Sonuç olarak, gruplar arasında bağdoku iplikleri dağılımı ve yoğunluğu bakımından herhangi bir farklılığın olmaması beslenmenin bu yönde etkili olmadığını, ancak anne sütü ile beslenen grupda en kalın dermis katmanının ve daha az sayıda kıl folliküllerinin varlığı, dericilik sanayisinde istenilen bir kalite kriteri olduğunu söyleyebiliriz. Anahtar Kelimeler: Beslenme, deri, histokimya, kıl folikülü, kuzu. Introduction Sheep breeding has an important place in Turkish economy. Domestic races hold a significant ratio in Turkey, which has a large sheep population. In sheep breeding, meat, milk and wool yields are sought after and therefore studies are conducted to increase these yields. Their leather is valuable as a product obtained after slaughtering (1). Skin that covers the body makes up 7-12% of the live weight. Besides its biological and immunological importance, it has an economic value as a raw material in industry (2). It consists of two layers with different development and features: Epidermis and dermis. Epidermis that covers the outer surface of the skin is covered with a stratified squamous keratinized epithelium and its thickness varies depending upon the body region (3, 4, 5). Dermis is a connective tissue that supports epidermis and links to hypodermis. Histologically, it consists of two sub-layers which are papillary and reticular layers (6). Reticular fibers, collagen fibers and elastic fibers are seen in papillary layer. Collagen fibers that belong to animals that completed growth period are more strongly structured (1). This layer is rich in blood vessels and nerve endings (1, 2, 6, 7). Reticular layer is defined as the portion that remains under sweat glands and roots of hair follicles, extending to hypodermis. Connective tissue fibers that are mostly present in the nature of collagen also contain small amounts of connective tissue cells (7). * This study was presentation in International Contribution 9th National Histology and Embryology Congress, 20 to 23 May 2008, Adana/TURKEY Yazışma Adresi Correspondence Muzaffer Aydın KETANİ Dicle Üniversitesi Veteriner Fakültesi, Histoloji ve Embriyoloji Anabilim Dalı, Diyarbakır - TÜRKİYE aketani@dicle.edu.tr ARAŞTIRMA F.Ü.Sağ.Bil.Vet.Derg. 2009: 23 (3): 141 - 146 http://www.fusabil.org