Zohar et al, 1984


Citation

Zohar, Y. and Billard, R. and Weil, C. (1984) La reproduction de la daurade (Sparus aurata) et du bar (Dicentrarchus labrax) : connaissance du cycle sexuel et contrôle de la gémétogénèse et de la ponte., pp.

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Dicentrarchus labrax Egg Oocyte diameter 1.15 1.15 mm
Dicentrarchus labrax Female Age at sexual maturity 4-5 [Female in Meditterranean Sea] and 5-8 [Off Irlande] 4.5 year
Dicentrarchus labrax Female Relative fecundity About 200 [Extreme values range from 293-358 for Irlande's populations to 492-955 for Tunisian populations] 325.5 thousand eggs/kg
Dicentrarchus labrax Female Onset of oogenesis December [At Arcachon, France] ['December']
Dicentrarchus labrax Female Intensifying oogenesis activity February-March [At Arcachon, France] ['February', 'March']
Dicentrarchus labrax Female Maximum GSI value About 7.5 [In April, at Arcachon] 7.5 percent
Dicentrarchus labrax Female Resting period < 0.5 [Between June to October, at Arcachon] 6.0 months
Dicentrarchus labrax Male Age at sexual maturity 2-3 [Female in Meditterranean Sea] and 4-7 [Off Irlande] 2.5 years
Dicentrarchus labrax Male Onset of spermatogenesis December-January ['January', 'December']
Dicentrarchus labrax Male Main spermatogenesis activity January-February [in Arcachon] ['January', 'February']
Dicentrarchus labrax Male Maximum GSI value 2.5 [March in Arcachon] to 5 [February, Sète] 2.5 percent
Dicentrarchus labrax Male Resting period < 0.5 [March to September] 8.0 months
Dicentrarchus labrax Spawning conditions Spawning season December to January with an optimum in January [Mediterranean Sea] and April-May [Britany] and June [Irlande] ['January', 'April', 'May', 'June', 'December']
Dicentrarchus labrax Spawning conditions Nycthemeral period of oviposition It does not seem that there is a specific hour, spawn all day long [in reared conditions, seem to spawn mostly during the morning] Day
Dicentrarchus labrax Spawning conditions Spawning release Once a year [One batch per female released during few hours] Multiple
Dicentrarchus labrax Spawning conditions Parity Iteroparous Iteroparous