Anna CHARUTA, Malgorzata DZIERZECKA, Marcin KOMOSA, Barbara DRZAZGA BIESIADA, Ewa SZCZEPANCZYK DZIALA, G. Ross COOPER

Age- and sex-related changes in mineral density and mineral content of the tibiotarsal bone in quails during post-hatching development

Bıldırcınların yumurtadan çıkışını takip eden süreçte, ilk kez bilgisayarlı tomografi kullanılarak tibiotarsal kemik mineral yoğunluğu (vBMD) ve mineral içeriği (BMC) analizi gerçekleştirilmiştir. Analiz, yaşları 2, 4, 6 ve 8 haftalık seksen erkek ve dişi bıldırcın üzerinde gerçekleştirilmiştir. İstatistiksel hesaplamalar iki yönlü ANOVA kullanılarak yerine getirilmiştir. vBMD’nin genellikle, metafiz ile karşılaştırıldığında, bıldırcınların tibiotarsal kemik içi diyafizinde 2 kat daha fazla olduğu saptanmıştır. Erkek bıldırcınların tibiotarsal kemik içi metafizinde vBMD ve BMC azalması, yumurtan çıkışını takip eden gelişme döneminin 4. ve 6. haftalarında meydana gelmektedir; erkeklerde en düşük vBMD (217 mg/ccm) ve BMC (3.68 mg/mm) değerleri 6. haftada gözlemlenmiştir. Buna karşın, dişilerde metafiz içinde vBMD azalması 4. ve 8. haftalarda oluşmuştur. Metafiz vBMD ve erkek vücut ağırlığı arasındaki Pearson’ın korelasyon katsayısı negatif olup 4. haftada r = - 0.71 ve 6. haftada r = -0.44 değerine sahiptir. Diyafizde ise her iki cinsiyet için 4. ve 8. haftada vBMD’de azalma olduğu gözlemlenmiştir. Yaptığımız çalışma, vBMD ve BMC değişikliklerinin mineralizasyon sürecini bozduğunu göstermiştir. Her iki cinsiyete yürüme konusunda isteksizliğe neden olup şekil bozuklukları ve çatlama olasılıklarını yükseltmişlerdir.

Anahtar Kelimeler:

kemik hastalıkları, kemik kırıkları, kemik minerelizasyonu, mineral madde içeriği, ontogeni, kümes hayvanları, bıldırcın, cinsiyet farklılıkları, tibia, vücut ağırlığı, biyolojik gelişim, yaş farklılıkları

Bıldırcınların yumurtadan çıkışını takip eden dönemde tibiorsal kemikte yaş ve cinsiyet ile ilişkili mineral yoğunluk ve mineral içerik değişiklikleri

For the first time computed tomography has been used to analyse tibiotarsal bones volumetric mineral density (vBMD) and mineral content (BMC) in quails during their post-hatching development. The analysis was performed including eighty male and female quails aged 2, 4, 6 and 8 weeks, respectively. Statistical calculations were performed using two-way ANOVA. It was found that vBMD generally in the middle of the diaphyses in the tibiotarsal bones in quails was two-fold higher vs. the metaphyses. Decrease of vBMD and BMC in the metaphyses of the tibiotarsal bones in males occurred between the 4 wk and 6 wk of the post-hatching development; the lowest values of vBMD (217 mg/ccm) and BMC (3.68 mg/mm) were observed in 6 wk males. In turn, in females, the decrease of vBMD in the metaphyses occurred in the 4th and 8th wk. Pearson’s correlation coefficient between the metaphyseal vBMD and body weight in males was negative and amounted to r = - 0.71 in the 4 wk and r = -0.44 in the 6 wk. In the middle of the diaphyses, decrease in vBMD was observed in both sexes in the 4 wk and 8 wk. Our research showed that changes in vBMD and BMC are disorders in the process of mineralisation. In both sexes, they caused reluctance to walk and increased the likelihood of deformities and fractures.

Keywords:

bone diseases, bone fractures, bone mineralization, mineral content, ontogeny, poultry, quails, sex differences, tibia, body weight, biological development, age differences,

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