Reproduction of Alosa pseudoharengus
Document source: http://fishbase.mnhn.fr/Reproduction/FishReproSummary.php?ID=1583&GenusName=Alosa&SpeciesName=pseudoharengus&fc=43&StockCode=1776
 
Main Ref. Whitehead, P.J.P., 1985
Mode dioecism
Fertilization external
Mating type
Spawning frequency one clear seasonal peak per year
Spawning aggregation Ref.  
Batch spawner Ref.  
Reproductive guild nonguarders
open water/substratum egg scatterers
Parental Care none
Description of life cycle and mating behavior Adults migrate up rivers and even small streams, spawn in lakes and quiet stretches of rivers; landlocked populations also ascend affluent rivers and streams; the fry descend in summer and autumn or even as late as November or December. Spawning activity has been observed both diurnally and nocturnally, but with greatest activity at night (Ref. 38797). Spawning activity stops above 27.8°C (Ref. 38881). Freshwater populations mature earlier and at a smaller average size than saltwater populations (Ref. 4639).
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