Ünver, 1998



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Leuciscus cephalus Spawning conditions Spawning period duration At the end of the observation of gonads, it was determined that the fish has laid from May to the end of June. In other studies, described as between April and May, and if the altitude is more than 1000 meters, spawning occurs in June 1000.0 weeks
Leuciscus cephalus Male Onset of spermatogenesis After August, the gonads began to develop and the values of GSI again started to increase gradually until November ['August', 'November']
Leuciscus cephalus Female Relative fecundity Linear increase between fecundity and weight: n=1588.6+120.53 x W 1588.6 thousand eggs/kg
Leuciscus cephalus Female Onset of oogenesis After August, the gonads began to develop and the values of GSI again started to increase gradually until November ['August', 'November']
Leuciscus cephalus Egg Oocyte diameter The highest mean egg diameter was found in May (1.04 mm) and the lowest values was found in July (0.46 mm). Eggs diameters were determine din other studies at 0.78-1.20 mm, 0.55-1.38 mm, 1.03 mm, and 0.83-1.50 mm 0.99 mm
Leuciscus cephalus Female Absolute fecundity The mean fecundity was found to be 1158 in age group II and 28664 in age group VII. In other studies, described as: 1909-15680, 1960, 61808, 13269-59200, 2050-20140 eggs 8794.5 thousand eggs
Leuciscus cephalus Female Weight at sexual maturity Means of 11.44 g [Age 2], 47.05 [Age 3], 71.15 [Age 4], 114.60 [Age 5], 159.9 [Age 6], and 240.3 [Age 7] for females 11.44 kg
Leuciscus cephalus Female Length at sexual maturity Means of 95.6 [Age 2], 153.1 [Age 3], 175.9 [Age 4], 206.0 [Age 5], 226.2 [Age 6], and 258.5 [Age 7] for females 95.6 cm
Leuciscus cephalus Spawning conditions Parity Maximum ages observed were VI in males and VII in females No category