Lopez, 2007



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Alosa fallax Spawning conditions Nycthemeral period of oviposition Spawning was observed to occur between 02:00 and 4:00 h No category
Alosa fallax Spawning conditions Spawning substrate Gravel susbtrate Lithophils
Alosa fallax Spawning conditions Spawning temperature Water ranged from 21.7°C to 24.5°C 21.7 °C
Alosa fallax Spawning conditions Spawning water type Enter the lower and middle rivers to spawn. Ebro River characterized by laminar fast flow areas No category
Alosa fallax Spawning conditions Spawning depth 3-4 m water depth 3.5 m
Alosa fallax Female Female sexual dimorphism Females were larger and heavier than males Absent
Alosa fallax Female Maximum GSI value Mean of 8.30 ± 0.83 [Between May and July] 8.3 percent
Alosa fallax Female Relative fecundity Mean of 46.83 ± 5.25 (n=9) 46.83 thousand eggs/kg
Alosa fallax Female Oocyte development Histological data showed that the ovary of twaite shad exhibited group-synchronous development Group-synchronous
Alosa fallax Egg Oocyte diameter Oocyte diameter 1.325 ± 0.032 1.325 mm
Alosa fallax Female Absolute fecundity Mean of 54294 ± 6174 (n=9) 54294.0 thousand eggs
Alosa fallax Female Weight at sexual maturity 970 to 1519 g [Female specified] 970.0 kg
Alosa fallax Female Length at sexual maturity Sizes range from 47.6 to 52.9 cm [Female specified] 47.6 cm
Alosa fallax Male Length at sexual maturity Range from 36.5 to 46 [Male specified] 36.5 cm
Alosa fallax Male Weight at sexual maturity Range from 523 to 905 g [Male specified] 523.0 kg
Alosa fallax Spawning conditions Spawning release Batch spawning reproductive behavior Mutliple