Barnabé, 1980



Citation


Barnabé, G. (1980) Exposé synoptique des données biologiques sur le loup ou bar Dicentrarchus labrax (Linné, 1758).
FAO Fish.Synop.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Dicentrarchus labrax Spawning conditions Mating system 1 or 2 males, always smaller than a female, with a female No category
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] but in the wild, fish were observed spawing during the day Day
Dicentrarchus labrax Spawning conditions Parental care Not any parental care is provided to eggs No category
Dicentrarchus labrax Spawning conditions Spawning substrate Above rocks Lithophils
Dicentrarchus labrax Spawning conditions Spawning temperature Vary between 10.6-12.6 11.6 °C
Dicentrarchus labrax Spawning conditions Spawning depth Mostly at depth < 10 m, yet spawners ready to spawn were found at 40-50 m deep 45.0 m
Dicentrarchus labrax Female Maximum GSI value About 7.5, in March [In Arcachon, France], 8% in January[In Sète, France], 7.5 in December [Tunisia] 7.5 percent
Dicentrarchus labrax Egg Incubation time 112 hours at 15°C, but vary from 70-120 hours dpeending on temperature 95.0 days
Dicentrarchus labrax Male Onset of spermatogenesis December [In Arcachon, France], October [In Sète, France], September [Tunisia] ['October', 'December', 'September']
Dicentrarchus labrax Female Relative fecundity 293-358 eggs/g for females 32.2-42.4 cm, also 492-955 eggs/g 325.5 thousand eggs/kg
Dicentrarchus labrax Male Maximum GSI value 2.5 in March [In Arcachon, France], 5% In January [In Sète, France], 5.2 in December [Tunisia] 2.5 percent
Dicentrarchus labrax Female Age at sexual maturity 4-7 [Great Brittany], 4 [Arcachon, France], 2 [Sète, France] and 2-3 [Tunisia] 5.5 years
Dicentrarchus labrax Egg Degree-days for incubation 70 DD [112 hour at 15°C] 70.0 °C * day
Dicentrarchus labrax Egg Temperature for incubation Rearing temperature 15°C 15.0 °C
Dicentrarchus labrax Female Resting period June-October [In Arcachon, France], May-October [In Sète, France], April-July [Tunisia] No data
Dicentrarchus labrax Male Main spermatogenesis activity January-February [In Arcachon, France], October-November [In Sète, France], October-November [Tunisia] ['February', 'October', 'November', 'January']
Dicentrarchus labrax Spawning conditions Spawning migration distance Not true migrations but rather small movements between feeding and spawning areas No data
Dicentrarchus labrax Female Onset of oogenesis October-November [In Arcachon, France], September [In Sète, France], October [Tunisia] ['October', 'November', 'September']
Dicentrarchus labrax Egg Egg size after water-hardening Mean of 1.115, range 1.12-1.19. In different studies vary from 1.15-1.20 in Mediterranean Sea and 1.08-1.51 in Atlantic Ocean [Fertilized eggs] 1.155 mm
Dicentrarchus labrax Egg Egg Buoyancy Pelagic Pelagic
Dicentrarchus labrax Female Intensifying oogenesis activity February [In Arcachon, France], October-November [In Sète, France], October-November [Tunisia] ['February', 'October', 'November']
Dicentrarchus labrax Spawning conditions Spawning migration period In England: In October, towards south (Cornouailles coast) then a back migration in spring following the spawning ['April', 'October', 'May', 'June']
Dicentrarchus labrax Male Resting period May-November [In Arcachon, France], May-October [In Sète, France], February-September [Tunisia] No data
Dicentrarchus labrax Spawning conditions Spawning season According to the lattitudes, spawns in winter, December to March with an optimum in January in Mediterranean Sea, April-May in Brittany (France), and up to June (Irland) ['April', 'March', 'January', 'May', 'December', 'June', 'February']
Dicentrarchus labrax Larvae Temperature during larval development Rearing temperature vary between 15-20, mostly at 18-19°C 17.5 °C
Dicentrarchus labrax Larvae Reaction to light Positively phototropic Photopositive
Dicentrarchus labrax Larvae Sibling intracohort cannibalism NO INFORMATIONS Absent
Dicentrarchus labrax Female Length at sexual maturity 37.7 [Great Brittany], 42.5 [Arcachon, France], 37.1-40 [Sète, France] and 31.4-32.6 [Tunisia] 38.55 cm
Dicentrarchus labrax Larvae Onset of exogeneous feeding First feeding about 6-7 days 6.5 °C * day
Dicentrarchus labrax Male Length at sexual maturity 33.7 [Great Brittany], 31.9-37.2 [Arcachon, France], 28-30 [Sète, France] and 23.1-25.5 [Tunisia] 34.55 cm
Dicentrarchus labrax Larvae Initial larval size 3.5-4, data based on a graph 3.75 mm
Dicentrarchus labrax Larvae Larvae behaviour Pelagic Pelagic
Dicentrarchus labrax Female Age at sexual maturity 5-8 [Great Brittany], 6 [Arcachon, France], 3 [Sète, France] and 4-5 [Tunisia] 6.5 year
Dicentrarchus labrax Spawning conditions Parity Could live up to 20 years, even 30 years in reared conditions No category