Doherty, 2004



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Alosa fallax Spawning conditions Nycthemeral period of oviposition Spawning usually takes place at dusk Dusk
Alosa fallax Spawning conditions Spawning substrate Mainly gravel Lithophils
Alosa fallax Spawning conditions Spawning site preparation No, eggs are released directly into the water column Open water/substratum scatter
Alosa fallax Spawning conditions Spawning water type Upper tidal limit of the River No category
Alosa fallax Spawning conditions Spawning depth Less than 1.5 m 1.5 m
Alosa fallax Female Maximum GSI value 18.8 ± 7.5% 18.8 percent
Alosa fallax Egg Incubation time 4-8 6.0 days
Alosa fallax Male Maximum GSI value 11.4 ± 2.9 11.4 percent
Alosa fallax Female Age at sexual maturity Mean age of 2.95 for males 2.95 years
Alosa fallax Egg Egg Buoyancy Sink to the bottom Semi-Pelagic
Alosa fallax Spawning conditions Spawning migration period In Ireland, mature fish enter from April to June, with peak spawning activity occuring in late May ['April', 'May', 'June']
Alosa fallax Larvae Initial larval size About 10 10.0 mm
Alosa fallax Female Age at sexual maturity Mean age of 5.6 for female 5.6 year