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            <front>

                <journal-meta>
                                                                <journal-id>ankara univ vet fak derg</journal-id>
            <journal-title-group>
                                                                                    <journal-title>Ankara Üniversitesi Veteriner Fakültesi Dergisi</journal-title>
            </journal-title-group>
                            <issn pub-type="ppub">1300-0861</issn>
                                        <issn pub-type="epub">1308-2817</issn>
                                                                                            <publisher>
                    <publisher-name>Ankara University</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id pub-id-type="doi">10.1501/Vetfak_0000002832</article-id>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Veterinary Surgery</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Veteriner Cerrahi</subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <article-title>Effects of conventional and organic rearing systems and hen age on  oxidative stress parameters of blood and ovarian tissues in laying hens</article-title>
                                                                                                                                                                                                <trans-title-group xml:lang="tr">
                                    <trans-title>Konvansiyonel ve organik yetiştirme sistemleri ile tavuk yaşının yumurta tavuklarının kan veyumurtalık dokusundaki oksidatif stres parametreleri üzerine etkisi</trans-title>
                                </trans-title-group>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                <name>
                                    <surname>Şimşek</surname>
                                    <given-names>Ülkü Gülcihan</given-names>
                                </name>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                <name>
                                    <surname>Baykalır</surname>
                                    <given-names>Yasin</given-names>
                                </name>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                <name>
                                    <surname>Erişir</surname>
                                    <given-names>Mine</given-names>
                                </name>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                <name>
                                    <surname>Benzer</surname>
                                    <given-names>Fulya</given-names>
                                </name>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20180301">
                    <day>03</day>
                    <month>01</month>
                    <year>2018</year>
                </pub-date>
                                        <volume>65</volume>
                                        <issue>1</issue>
                                        <fpage>85</fpage>
                                        <lpage>91</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20180301">
                        <day>03</day>
                        <month>01</month>
                        <year>2018</year>
                    </date>
                                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 1954, Ankara Üniversitesi Veteriner Fakültesi Dergisi</copyright-statement>
                    <copyright-year>1954</copyright-year>
                    <copyright-holder>Ankara Üniversitesi Veteriner Fakültesi Dergisi</copyright-holder>
                </permissions>
            
                                                                                                <abstract><p>In this study, effects of hen age and rearing systems on some oxidative stress parameters in serum and ovarian tissues of hens are investigated. For this purpose, total of 48 Bovans White commercial laying hybrids from two different rearing systems (conventional cage and organic) at 30 and 60 weeks of age were used. Serum and ovarian tissues of the hens were collected following slaughter process and malondialdehyde (MDA), glutathione (GSH), glutathione peroxidase (GSH-Px) and catalase (CAT) levels of serum and ovarian tissues were determined. MDA levels of serum was found significantly higher in conventional system, both in 30 and 60 weeks old (P&amp;lt;0.05). GSH-Px activity was lower, conversely CAT activity was significantly higher in conventional system (P&amp;lt;0.05). Hen age didn’t affect MDA, GSH, GSH-Px and CAT levels of serum (P&amp;gt;0.05). In addition, there weren’t any significant interactions between rearing system and hen age in serum (P&amp;gt;0.05). MDA (P=0.010) and GSH (P&amp;lt;0.01) levels of ovarian tissue were found significantly higher in conventional system while GSH levels of ovarian tissue had increased in 60 weeks old (P&amp;lt;0.01). GSH-Px and CAT activity was similar between groups (P&amp;gt;0.05). Interaction between rearing system and hen age affected activity of CAT in ovarian tissue (P&amp;lt;0.05). As a result, conventional battery cages caused oxidative stress interrelated with increasing lipid peroxidation and MDA levels in laying hens. Antioxidant enzymes that play role in reduction of MDA were inadequate in this system. Oxidant/antioxidant balance can be established at 30 or 60 weeks of age by hen organism and therefore MDA levels of tissues would not be affected by age</p></abstract>
                                                                                                                                    <trans-abstract xml:lang="tr">
                            <p>Bu çalışmada yetiştirme sistemleri ve tavuk yaşının, tavukların serum ve yumurtalık dokusundaki bazı oksidatif stres parametreleri üzerine etkileri incelendi. Bu amaçla 30 ve 60 haftalık yaşta, iki farklı sistemden (konvansiyonel kafes ve organik) toplam 48 adet ticari yumurtacı hibrit olan Bovans White kullanıldı. Kesim işlemini takiben tavukların serum ve yumurtalık dokuları toplanarak, malondialdehid (MDA), glutatyon (GSH), glutatyon peroksidaz (GSH-Px) ve katalaz (CAT) düzeyleri belirlendi. Konvansiyonel kafeste yetiştirilen hem 30, hem de 60 haftalık tavukların serum MDA düzeyleri önemli derecede yüksek bulundu (P&amp;lt;0.05). Konvansiyonel kafeste GSH-Px aktivitesi düşük, aksine CAT aktivitesi önemli düzeyde yüksek tespit edildi (P&amp;lt;0.05). Tavuk yaşı serum MDA, GSH, GSH-Px ve CAT düzeylerini etkilemedi (P&amp;gt;0.05). Buna ek olarak, serumda, yetiştirme sistemi ve tavuk yaşı arasında önemli bir etkileşim bulunmadı (P&amp;gt;0.05). Konvansiyonel sistemdeki tavukların yumurtalık dokusunda MDA (P=0.010) ve GSH (P&amp;lt;0.01) seviyeleri önemli düzeyde yüksek bulunurken, GSH seviyesi 60 haftalık yaşta arttı (P&amp;lt;0.01). GSH-Px ve CAT aktiviteleri gruplar arasında benzer çıktı (P&amp;gt;0.05). Yetiştirme sistemi ve tavuk yaşı arasındaki etkileşim yumurtalık dokusunda CAT aktivitesini etkiledi (P&amp;lt;0.05). Sonuç olarak, konvansiyonel bataryalı kafesler, lipid peroksidasyon ve MDA düzeylerinin artmasıyla ilişkili olarak tavuklarda oksidatif strese neden oldu. Bu sistemde MDA’nın azalmasında rol oynayan antioksidan enzimler yetersiz kaldı. Oksidan/antioksidan dengesi 30 ve 60 haftalık yaşlarda tavuk organizması tarafından kurulabildi ve dolayısıyla dokuların MDA düzeyleri yaştan etkilenmedi</p></trans-abstract>
                                                            
            
                                                            <kwd-group>
                                                    <kwd>Antioxidant activity</kwd>
                                                    <kwd>   hen age</kwd>
                                                    <kwd>   lipid peroxidation</kwd>
                                                    <kwd>   rearing system</kwd>
                                            </kwd-group>
                                                        
                                                                            <kwd-group xml:lang="tr">
                                                    <kwd>Antioksidan aktivite</kwd>
                                                    <kwd>   lipit peroksidasyon</kwd>
                                                    <kwd>   tavuk yaşı</kwd>
                                                    <kwd>   yetiştirme sistemi</kwd>
                                            </kwd-group>
                                                                                                            </article-meta>
    </front>
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