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dc.contributor.author
Di Prinzio, Cecilia Yanina
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dc.contributor.author
Casaux, Ricardo Jorge
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dc.contributor.author
Miserendino, Maria Laura
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dc.date.available
2020-02-18T21:03:13Z
dc.date.issued
2009-10
dc.identifier.citation
Di Prinzio, Cecilia Yanina; Casaux, Ricardo Jorge; Miserendino, Maria Laura; Effects of land use on fish assemblages in Patagonian low order streams; EDP Sciences; Annales de Limnologie-International Journal of Limnology; 45; 4; 10-2009; 267-277
dc.identifier.issn
0003-4088
dc.identifier.uri
http://hdl.handle.net/11336/97991
dc.description.abstract
We assessed the effects of land use on the structure of stream fish assemblages in Northwest Patagonia, Argentina. To this end, a total of 18 sites distributed in 15 streams were sampled during the low water period. At each site, 26 regional and local scale variables were used to describe the environmental conditions. The macroinvertebrate density, and the composition and abundance of fish were then recorded. Statistical associations between local assemblage structures and environmental variables were quantified by canonical correspondence analyses. The results revealed that, at a regional scale, the fish assemblages were primarily determined by watershed features like altitude and catchment area, and by land use effects (exotic forest and pasture). Assemblage compositions were also related to some local-scale features such as water velocity, food availability (density of benthic macroinvertebrates), instream characteristic and riparian features. Also, the observed fish species richness was low. Overall, exotic salmonids largely dominated in the samples both in numbers of individuals (98.9%) and in biomass (99.9%), whereas native fish (Hatcheria macraei and Odontesthes hatcheri) were scarcely represented. Rainbow trout (Oncorhynchus mykiss) was the most abundant fish, and was present in all streams. Native species were restricted to five streams located in the ecotone between the Andes and the steppe, where salmonids were also present. Salmonids were the only fish at Andean streams which suggest the existence of a strong geographic segregation between native and exotic species. Some aspects related to the incidence of the introduced species in the structure of fish assemblages are discussed.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
FISH ASSEMBLAGES
dc.subject
LAND USE EFFECTS
dc.subject
NORTHWEST PATAGONIA
dc.subject.classification
Ecología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Effects of land use on fish assemblages in Patagonian low order streams
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-12-12T14:47:31Z
dc.identifier.eissn
2100-000X
dc.journal.volume
45
dc.journal.number
4
dc.journal.pagination
267-277
dc.journal.pais
Francia
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dc.journal.ciudad
Tolouse
dc.description.fil
Fil: Di Prinzio, Cecilia Yanina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Casaux, Ricardo Jorge. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina
dc.description.fil
Fil: Miserendino, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina
dc.journal.title
Annales de Limnologie-International Journal of Limnology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1051/limn/2009030
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.limnology-journal.org/articles/limn/abs/2009/04/limn09029/limn09029.html
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