Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)

Background: Since its accidental introduction in 1991, - Limnoperna fortunei has spread throughout the del Plata basin becoming established as a new non-indigenous freshwater bivalve in South America. Results: I compared its population dynamics between two - sites in the Río de la Plata Estuary at B...

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Autor principal: Spaccesi, Fernando G.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Zoología
Biological invasion
Brackish water
Hard substrate
Population dynamics
South America
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84972
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84972
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Biological invasion
Brackish water
Hard substrate
Population dynamics
South America
spellingShingle Zoología
Biological invasion
Brackish water
Hard substrate
Population dynamics
South America
Spaccesi, Fernando G.
Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)
topic_facet Zoología
Biological invasion
Brackish water
Hard substrate
Population dynamics
South America
description Background: Since its accidental introduction in 1991, - Limnoperna fortunei has spread throughout the del Plata basin becoming established as a new non-indigenous freshwater bivalve in South America. Results: I compared its population dynamics between two - sites in the Río de la Plata Estuary at Bagliardi Beach (freshwater) and Punta Indio Beach (saltwater-influenced) 90 km to the south, by monthly sampling of mussel conglomerates on hard substrate - during low tides for 1 year and observed significant variability over space and time. Punta Indio exhibited lower abundances of recruits (<1 mm) and post-recruits along with a larger adult size than those at Bagliardi Beach. The extent of air exposure appeared to be a major constraint regulating mussel densities in these areas. The high recruitment at Bagliardi Beach indicated continuous reproduction that was positively correlated with temperature changes. Recruits survived in low water temperatures (10.7°C). The species' abundance had stabilized by several years after the invasion. In contrast, at Punta Indio, settlement availability depended on critical environmental conditions. The multivariate analysis- identified a combination of physicochemical variables, of temperature, dissolved solids, and oxygen saturation, that best explained the golden mussel's abundance. Possible north-to-south larval dispersal may have influenced recruitment patterns. The von Bertalanffy growth model suggested that populations consisted of three principal cohorts at both Bagliardi Beach and Punta Indio: Lt = 18 to 20 mm (first-year growth) and Linf = 30 mm. Mussels of Punta Indio showed faster growth rates (k) than those at Bagliardi Beach, probably because of wave exposure and low population densities. Conclusions: This work provides specific information that complements our present knowledge of the ecology of this invasive mollusk. Further studies will be essential to gain an understanding of the population dynamics and the way in which the golden mussel reacts to stressful conditions.
format Articulo
Articulo
author Spaccesi, Fernando G.
author_facet Spaccesi, Fernando G.
author_sort Spaccesi, Fernando G.
title Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)
title_short Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)
title_full Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)
title_fullStr Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)
title_full_unstemmed Abundance, recruitment, and shell growth of the exotic mussel Limnoperna fortunei in the Río de la Plata (Argentina)
title_sort abundance, recruitment, and shell growth of the exotic mussel limnoperna fortunei in the río de la plata (argentina)
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/84972
work_keys_str_mv AT spaccesifernandog abundancerecruitmentandshellgrowthoftheexoticmussellimnopernafortuneiintheriodelaplataargentina
bdutipo_str Repositorios
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