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- Potential fecundity of twaite shad Alosa fallax fallax (Pisces: Clupeidae) from the upper estuary of the river Mira (SW Portugal): preliminary resultsPublication . Pina, Teresa; Esteves, Eduardo; Coelho, M.L.; Andrade, José Pedro AndradeThe great majority of European anadromous fishes are threatened species (Leleck, 1980). Despite the existing legal protection for migration fishes, these are vulnerable and particulary threatened by antropogenic impact, by physical obstacles for migrating fish and by physical impacts on spawning and nursery areas.
- Diel variation of fish eggs and larvae in two Portuguese estuaries (rivers Mira and Guadiana)Publication . Esteves, Eduardo; Coelho, M.L.; Pina, Teresa; Andrade, José Pedro AndradeThe importance of estuaries as fish nurseries areas has been well documented. Several studies have indicated that a variety of factors, both abiotic and biotic, influence the distribution of fish species in a estuary (Robinson & Bain, 1989).