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Título

Field distribution and osmoregulatory capacity of shrimps in a temperate European estuary (SW Spain)

AutorGonzález-Ortegón, Enrique CSIC ORCID ; Pascual Vázquez, Emilio CSIC; Cuesta, José A. CSIC ORCID ; Drake, Pilar CSIC ORCID
Palabras claveCrustacean decapod
Estuary
Osmoregulation
Isosmotic point
Field distribution
SW Spain
Guadalquivir estuary
Fecha de publicaciónmar-2006
EditorElsevier
CitaciónEstuarine Coastal and Shelf Science 67(1-2): 293-302 (2006)
ResumenThe spatial distribution of the six most common crustacean decapods in the benthos and hyperbenthos of the Guadalquivir estuary (SW Spain) has been analysed in relation to their osmoregulatory capacities (at 20 °C). Field densities along the estuarine salinity gradient revealed that, although the species studied showed salinity tolerance ranges in the field that do overlap to some extent, there was a considerable spatial and/or salinity-related segregation between several of them. Concerning their isosmotic points and their osmoregulatory salinity ranges, two main groups of species were distinguished: species with higher isosmotic points and tight ranges in osmoregulation, represented by marine species that entered the estuary from open sea and remained there for only part of the year (Crangon crangon, Melicertus kerathurus and Palaemon serratus); and those with slightly lower isosmotic points and wide ranges in osmoregulation, represented by estuarine species which completed their life cycle in brackish water (Palaemon longirostris, Palaemon macrodactylus and Palaemonetes varians). For all the species studied, their field distributions were clearly biased towards the lower end of the salinity ranges within which they osmoregulate. Nevertheless, individuals of the less euryhaline species (M. kerathurus and P. serratus) were mainly found in less saline water when the estuarine gradient was displaced downstream and low salinities occurred close to the river mouth.
Descripción10 páginas, 7 figuras, 2 tablas.-- © 2005 Elsevier Ltd. All rights reserved.
Versión del editorhttp://dx.doi.org/10.1016/j.ecss.2005.11.025
URIhttp://hdl.handle.net/10261/43683
DOI10.1016/j.ecss.2005.11.025
ISSN0272-7714
E-ISSN1096-0015
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