Digital.CSIC > Recursos Naturales > Instituto de Ciencias Marinas de Andalucía (ICMAN) > (ICMAN) Artículos >





Closed Access item Assessment of the interaction between the white shrimp, Palaemon longirostris, and the exotic oriental shrimp, Palaemon macrodactylus, in a European estuary (SW Spain)

Authors:González-Ortegón, Enrique
Cuesta, José A.
Pascual, E.
Drake, Pilar
Keywords:Palaemon macrodactylus, Oriental shrimp, Palaemon longirostris, Interaction, Guadalquivir estuary
Issue Date:23-Sep-2009
Citation:Biological Invasions 12(6): 1731-1745 (2010)
Abstract:Results of field surveys, stomach content analysis, and laboratory measurements of oxygen consumption at different salinities in the exotic shrimp Palaemon macrodactylus and its native counterpart P. longirostris from the Guadalquivir estuary (SW Spain) were used to assess interaction between both species. After its first record in this estuary in 1998, P. macrodactylus has shown a gradual increase in density and its estuarine population has been clearly dominated by juveniles. Feeding habits of both shrimps indicated a strong trophic overlap between them, with mysids as main prey. Their salinity-related and spatial distribution patterns show that maximal inter-specific overlap between the two populations occurs in the inner, less saline part of the estuary. Specific oxygen consumption rates under different salinities and water oxygen concentrations suggest a more efficient metabolism and a higher tolerance to hypoxic conditions in brackish waters by P. macrodactylus than by P. longirostris. Such inter-specific physiological differences could have made it possible for the exotic P. macrodactylus to invade an estuarine stretch that, prior to its arrival, was infra-utilized by native species.
Description:15 páginas, 6 figuras, 4 tablas.
Publisher version (URL):http://dx.doi.org/10.1007/s10530-009-9585-2
E-ISSNmetadata.dc.identifier.doi = DOI:1573-1464
Appears in Collections:(ICMAN) Artículos

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.