Original scientific paper
https://doi.org/10.14798/72.4.762
REPRODUCTION BIOLOGY OF Capoeta trutta (Heckel, 1843) IN THE SHOUR RIVER, SOUTHWEST IRAN
Mehran Javaheri Baboli
; Department of Fisheries Science, College of Agricultural Sciences and Natural Resources, Ahvaz branch, Islamic Azad University, Ahvaz, Iran
Mohsen Taghavi Niya
; Young Researchers Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Abstract
Reproductive characteristics of touyeni Capoeta trutta (Heckel, 1843), a native cyprinid in the Shour River, Iran, were investigated by monthly sampling between July 2010 and June 2011. Among 815 specimens captured, the overall sex ratio was 1:1.96 (males:females). Monthly changes of the gonado-somatic index (GSI) and frequency distribution of egg diameter confirmed that spawning lasted from January to April. Results indicated that the age at first maturity for males is one year and for females two years. Fecundity increased with fish age, averages being 2591 for 1+ old females and 11552 eggs in mature 6+ old females. Correlation of absolute fecundity and body weight was high (R= 0.85). The absolute fecundity between all age groups was statistically significant (p<0.05).
Keywords
Tuwini fish; Capoeta trutta; Shour River; Reproduction biology
Hrčak ID:
130500
URI
Publication date:
12.12.2014.
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