A preliminary characterisation of the habitat use and feeding of Allis shad (Alosa alosa) juveniles in the Minho River tidal freshwater wetlands

The availability of high-quality rearing areas and survival during the early life-history stages are considered key factors determining the number of recruits produced and are prerequisites for the successful recruitment of several fish species. To identify the freshwater habitat use of Allis shad, several samples were collected in the tidal and non-tidal freshwater areas of the Minho River during the autumn of 2009. The two places where juveniles were found are substantially different in terms of sediment texture and organic matter but similar in depth and water current velocities. The food i... Mehr ...

Verfasser: Mota, Micaela
Antunes, Carlos
Parque do Castelinho. Aquamuseu do Rio Minho
ESG-Escola Superior Gallaecia. Largo das Oliveiras
Dokumenttyp: Artikel
Erscheinungsdatum: 2012
Schlagwörter: Allis shad / Juvenils / Conservació / Juveniles / Hàbitat / Etapa d'aigua dolça / Habitat / Freshwater stage / Conservation / Sábalo / Hábitat / Etapa de agua dulce / Conservación
Sprache: Englisch
Permalink: https://search.fid-benelux.de/Record/base-27258071
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://ddd.uab.cat/record/108881

The availability of high-quality rearing areas and survival during the early life-history stages are considered key factors determining the number of recruits produced and are prerequisites for the successful recruitment of several fish species. To identify the freshwater habitat use of Allis shad, several samples were collected in the tidal and non-tidal freshwater areas of the Minho River during the autumn of 2009. The two places where juveniles were found are substantially different in terms of sediment texture and organic matter but similar in depth and water current velocities. The food items found in the stomach contents may indicate that movements of juveniles occur in the estuary. ; La disponibilidad de áreas de crecimiento adecuadas y la supervivencia de las primeras etapas de vida de los peces están consideradas factores clave para determinar la abundancia de diferentes especies. Con el fin de identificar áreas de crecimiento de juveniles de sábalo, se han realizado en el otoño de 2009 varios estudios de campo a lo largo de la zona de agua dulce que se encuentra afectada, o no, por las mareas del río Miño. Las dos zonas donde se han encontrado juveniles difirieron considerablemente en la textura de los sedimentos y materia orgánica, pero eran similares en profundidad y velocidad de corrientes. Los alimentos encontrados en el contenido estomacal sugieren la existencia de movimientos en el estuario.