Dergiler / Turkish Journal of Zoology / 2007 / Cilt: 31 - Sayı: 2
Karasu Nehri Aşkale Mevkiinde Yaşayan Chalcalburnus mossulensis (Heckel, 1843)`in Bazı Üreme Özellikleri
- Sayfa
- 193–200
- DOI
- —
Özet
Kas›m 1995 ile Ekim 1997 tarihleri aras›nda Karasu Nehri Aflkale mevkiinden yakalanan Chalcalburnus mossulensis`in cinsiyet oran›, üreme mevsimi, ilk olgunluk, yumurta verimi gibi üreme özellikleri araflt›r›lm›flt›r. Erkek difli oran› 1:1,08 ve istatistik olarak önemsiz bulunmufltur. Yumurta verimi 3012 ile 11.417 yumurta/birey aras›nda de¤iflmifltir. Yumurta verimi ile boy, a¤›rl›k, gonat a¤›rl›¤› ve yafl aras›nda korelasyonlar bulunmufltur. ‹lk olgunluk yafl› ve boyu da, erkek ve difliler için s›ras›yla, 1,26 y›l, 9,24 cm ve 1,81 y›l, 9,65 cm olarak hesaplanm›flt›r. Üreme su sicakl›¤›n›n 15 °C ulaflt›¤› Haziran ile A¤ustos aras›nda meydana gelmifltir.
Abstract
Some reproduction characteristics of Chalcalburnus mossulensis from the Aşkale region of the Karasu River, including sex ratio, spawning season, first maturity, and fecundity, were investigated between November 1995 and October 1997. The male to female ratio was 1:1.08, which was not significantly different from 1:1. Fecundity ranged from 3012 to 11,417 ova per female. There were significant correlations between fecundity, and fork length, total weight, age, and gonad weight. The length and age at first maturity for the males and females were 1.26 years and 9.24 cm, and 1.81 years and 9.65 cm, respectively. The spawning period was from June to August, when the water temperature reached 15 °C.