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Use of a flooded salt marsh habitat by an endangered cyprinodontid fish (Aphanius iberus)

We report the first data on the use of occasionally inundated habitats in a Mediterranean coastal lagoon by the Spanish toothcarp (Aphanius iberus), a cyprinodontid fish in danger of extinction. During a flooding period, we sampled the fish population and the macroinvertebrate community in three contrasting habitats: mats of green algae, open water, and a habitat dominated by glasswort (Salicornia patula) that is occasionally inundated. The three habitats displayed strong variation in density and species composition of invertebrates in the water column and the benthos. In general, algal mats had higher invertebrate biomasses, but glasswort had higher diversity of organisms, in part of terrestrial origin. The density of toothcarp was very low in the open water. The habitat that is occasionally inundated (glasswort) significantly had the highest density of mature toothcarp, while immature fish were similarly abundant in the glasswort and algal mat habitats. Condition (weight-length relationship) and total food biomass in the gut contents of immature toothcarp was significantly higher in algal mats than in glasswort, whereas there were no such differences for mature fish. Therefore, the occasionally flooded habitat (glasswort) was positively selected by large mature toothcarp but seemed a disadvantageous habitat for immature individuals

Financial support was provided by the Spanish Ministry of Science and Technology (REN2003-00477), the Government of Catalonia (Catalan Government Distinction Award for university research 2004 to EGB) and a LIFE-Nature project (LIFE 99 NAT/E/00 6386)

© Hydrobiologia, 2008, vol. 600, núm. 1, p. 177-185

Springer Verlag

Author: Alcaraz Cazorla, Carles
Pou i Rovira, Quim
García-Berthou, Emili
Date: 2008
Abstract: We report the first data on the use of occasionally inundated habitats in a Mediterranean coastal lagoon by the Spanish toothcarp (Aphanius iberus), a cyprinodontid fish in danger of extinction. During a flooding period, we sampled the fish population and the macroinvertebrate community in three contrasting habitats: mats of green algae, open water, and a habitat dominated by glasswort (Salicornia patula) that is occasionally inundated. The three habitats displayed strong variation in density and species composition of invertebrates in the water column and the benthos. In general, algal mats had higher invertebrate biomasses, but glasswort had higher diversity of organisms, in part of terrestrial origin. The density of toothcarp was very low in the open water. The habitat that is occasionally inundated (glasswort) significantly had the highest density of mature toothcarp, while immature fish were similarly abundant in the glasswort and algal mat habitats. Condition (weight-length relationship) and total food biomass in the gut contents of immature toothcarp was significantly higher in algal mats than in glasswort, whereas there were no such differences for mature fish. Therefore, the occasionally flooded habitat (glasswort) was positively selected by large mature toothcarp but seemed a disadvantageous habitat for immature individuals
Financial support was provided by the Spanish Ministry of Science and Technology (REN2003-00477), the Government of Catalonia (Catalan Government Distinction Award for university research 2004 to EGB) and a LIFE-Nature project (LIFE 99 NAT/E/00 6386)
Format: application/pdf
ISSN: 0018-8158 (versió paper)
1573-5117 (versió electrònica)
Document access: http://hdl.handle.net/10256/12419
Language: eng
Publisher: Springer Verlag
Collection: MICYT/PN 2003-2006/REN2003-00477
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s10750-007-9230-y
Articles publicats (D-CCAA)
Is part of: © Hydrobiologia, 2008, vol. 600, núm. 1, p. 177-185
Rights: Tots els drets reservats
Subject: Cipriniformes
Cypriniformes
Fartet
Spanish toothcarp
Espècies amenaçades
Endangered species
Title: Use of a flooded salt marsh habitat by an endangered cyprinodontid fish (Aphanius iberus)
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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