Journals / Turkish Journal of Veterinary and Animal Sciences / 2002 / Cilt: 26 - Sayı: 5
Annual Cycle of Serum Gonadal Steroids and Serum Lipids in Capoeta capoeta umbla, Güldenstaedt, 1772 (Pisces: Cyprinidae)
- Pages
- 1093–1096
- DOI
- —
Abstract
Seasonal changes in serum concentrations of the testosterone in males, 17b-estradiol in females and triglyceride and cholesterol in both sexes of Capoeta capoeta umbla were determined. Peak concentrations of testosterone (2.828 ± 0.278 ng/mL) and 17b-estradiol (3.182 ± 0.116 ng/mL) occurred in May. The concentrations of testosterone and 17b-estradiol were significantly correlated with the gonadosomatic index in both sexes. After the spawning period, steroid hormone levels significantly diminished (P < 0.05). The triglyceride concentration was highest in April (607.611 ± 30.146 mg/dL). The serum cholesterol level showed a rising trend until April and reached peak values during this month (393.000 ± 8.991 mg/dL). In the spawning month (May), a significant decrease was observed in triglyceride and cholesterol concentrations (P < 0.05). These results suggest that seasonal changes in both serum lipids and steroid hormones were associated with reproductive activity in C. c. umbla.
Özet
Capoeta capoeta umbla’n›n kan serumunda testosteron (erkeklerde), 17β-estradiol (diflilerde), kolesterol ve trigliseridin (her iki cinsiyette) konsantrasyonlar›ndaki mevsimsel de¤iflimleri belirlendi. Testosteron (2,828 ± 0,278 ng/mL) ve 17β-estradiolun (3,182 ± 0,116 ng/mL) en yüksek konsantrasyonlar› May›s ay›nda tespit edildi. Her iki cinsiyette de testosteron ve 17β-estradiolun konsantrasyonlar›n›n gonadosomatik indeks de¤eriyle korelasyon gösterdi¤i görüldü. Yumurtlama periyodundan sonra, streoid hormonlar›n seviyeleri önemli derecede azald› (P < 0,05). Trigliserid konsantrasyonu Nisanda en yüksekti (607,611 ± 30,146 mg/dL). Serum kolesterol seviyesi Nisana kadar bir art›fl trendine girdi ve en yüksek de¤ere bu ayda ulaflt› (393,000 ± 8,991 mg/dL). Yumurtlama ay›nda (May›s) kolesterol ve trigliseridin konsantrasyonlar›nda önemli derecede bir azalma görüldü (P < 0,05). Bu sonuçlar C. c. umbla’n›n her iki cinsiyetinde de serum lipid ve streoid hormonlar›n›n mevsimsel de¤ifliminin üreme faaliyetiyle iliflkili oldu¤unu göstermifltir.