Aprahamian, 2001



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Alosa fallax Spawning conditions Nycthemeral period of oviposition Mainly nocturnal though has been reported during daylight Ambiguous
Alosa fallax Spawning conditions Spawning substrate Occurs over susbtrate ranging from mud to sandy-gravel Ambiguous
Alosa alosa Spawning conditions Spawning temperature Above 15 15.0 °C
Alosa fallax Spawning conditions Spawning water type Occurs in fresh water No category
Alosa fallax Spawning conditions Spawning depth 0.15 to 8 m 0.15 m
Alosa alosa Female Female sexual dimorphism Females grow faster and mature later than males Absent
Alosa fallax Male Male sexual dimorphism Males mature a year earlier Absent
Alosa fallax Egg Incubation time 3-5 [Incubation takes 72 to 120 hours depdning on temperature] 4.0 days
Alosa fallax Female Relative fecundity 42,540-302,358 421.0 thousand eggs/kg
Alosa alosa Female Age at sexual maturity Adults range from 3 and 8 years 3.0 years
Alosa fallax Female Age at sexual maturity From 2 to 9 years, with males from 3-4 years 3.5 years
Alosa fallax Egg Temperature for incubation Successfully develop between 15 and 25°C 15.0 °C
Alosa fallax Egg Egg size after water-hardening 1.7-4.5 3.1 mm
Alosa alosa Spawning conditions Spawning migration period All anadromous populations have common biological characteristics: the migration (december-June) ['June']
Alosa fallax Spawning conditions Spawning migration period The spawning migration into the estuary begins between February (southern populations) and May (northern populations), extends for thee months and is temperature depend ['February', 'May']
Alosa fallax Female Absolute fecundity 25,942-675,000 808.5 thousand eggs
Alosa alosa Spawning conditions Spawning season All anadromous populations have common biological characteristics: the reproduction (April-July), above 11 ['April', 'July']
Alosa fallax Larvae Initial larval size 4.24-9.2 at hatching 6.72 mm
Alosa alosa Female Age at sexual maturity Adults range from 3 and 8 years 3.0 year
Alosa fallax Female Age at sexual maturity From 2 to 9 years with females mainly at 4-5 years 4.5 year
Alosa alosa Spawning conditions Parity Populations are semelparous No category
Alosa fallax Spawning conditions Parity All populations are iteroparous, having a high proportion of repeat spawners No category