Sex structure and fecundity of pontic shad (Alosa immaculata) in the Romanian sector of the Danube river

Key Points

• Fecundity of pontic shad varies significantly with sex structure, affecting population sustainability.
• Key findings show reproductive output is linked to environmental factors and habitat conditions across seasons.
• Observational analysis across the Romanian Danube River assessed fish populations and reproductive traits.
• Findings highlight the need for conservation strategies to support reproductive biology in river ecosystems.