Mann, 1976



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Leuciscus cephalus Female Maximum GSI value 9-10% [In Mid-May] 9.5 percent
Leuciscus cephalus Male Onset of spermatogenesis The redevelopment of gonads did not begin until September ['September']
Leuciscus cephalus Male Maximum GSI value Most between 2.5-4, some almost 6% [June] 3.25 percent
Leuciscus cephalus Female Age at sexual maturity The majority of males are mature at age V though some are ripe as early as age III No data
Leuciscus cephalus Female Resting period June-September quiescent period, About 1% 1.0 months
Leuciscus cephalus Male Main spermatogenesis activity March, but increase quite regularly between September to May ['March', 'May', 'September']
Leuciscus cephalus Female Onset of oogenesis The redevelopment of gonads did not begin until September ['September']
Leuciscus cephalus Female Intensifying oogenesis activity Increase regularly from September to May, but most between March-April ['April', 'March', 'May', 'September']
Leuciscus cephalus Male Resting period June-September quiescent period, About 1% 1.0 months
Leuciscus cephalus Female Absolute fecundity Lowest fecundity observed at 32155 for a female 41.5 cm long and 1253 g and highest 64658 for a female 46 cm long and 1660 g 32155.0 thousand eggs
Leuciscus cephalus Spawning conditions Spawning season Spawning occurred from the end of May into June ['May', 'June']
Leuciscus cephalus Female Weight at sexual maturity Mean weight of 92 g [Age 4] and 174 [Age 5] 92.0 kg
Leuciscus cephalus Female Length at sexual maturity Size in different regions, for females varie between 19.4-22.2 [Age 4] and 24.1-25.1 [Age 5] and 15.2 and 20.8 for both sex at age 4 20.8 cm
Leuciscus cephalus Male Length at sexual maturity Size in different regions, for males varie between 13.8-20.1 [Age 3] and 19.4-22 [Age 4] and 15.2 and 20.8 for both sex at age 4 16.95 cm
Leuciscus cephalus Male Weight at sexual maturity Mean weight of 33 g [Age 3] and 92 g [Age 4] 33.0 kg
Leuciscus cephalus Female Age at sexual maturity Most females are mature at age VII and some at V or VI No data
Leuciscus cephalus Spawning conditions Parity Each fish appeared to spawn every year No category