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dc.contributor.author
Cerón, Geardo Abel
dc.contributor.author
Boy, Claudia Clementina
dc.date.available
2018-02-27T21:28:23Z
dc.date.issued
2014-06
dc.identifier.citation
Cerón, Geardo Abel; Boy, Claudia Clementina; Prey selection and energy values of main food items of the torrent duck (Merganetta armata) in Northwestern Patagonia, Argentina; Waterbird Society; Waterbirds; 37; 2; 6-2014; 153-161
dc.identifier.issn
1524-4695
dc.identifier.uri
http://hdl.handle.net/11336/37353
dc.description.abstract
The Torrent Duck (Merganetta armata) is one of four species of waterfowl that live in fast flowing rivers. Torrent Ducks feed on benthic invertebrates in mountain rivers from Venezuela to Argentina. Prey selection by Torrent Ducks was investigated by comparing the proportion of prey taxa in their feces with the proportion available in river benthos. Feces and benthos were sampled during spring and autumn at sites with different precipitation levels in northwestern Argentine Patagonia. Energy values of the most important prey items were evaluated and the results adjusted for the amount of chitin body proportions. The average energy value of each individual prey item was 3.60 J in Gripopterygidae, 5.88 J in Simuliidae, 11.48 J in Atalophlebiinae and 12.25 J in Smicridea spp. These four invertebrate taxa represented approximately 80% of Torrent Duck diet. Prey availability and energy value alone could not explain the total Torrent Duck diet, and it was necessary to consider other factors such as aspects of prey natural history and their distribution in the benthos. Most consumed items were filter-feeding species (Simuliidae and Smicridea spp.) that inhabited rock surfaces that were more accessible to Torrent Ducks. Gripopterygidae and Atalophlebiinae were less accessible as they inhabit in the lower part of rocks. Diet information can be used to assess the availability of the most important prey items of Torrent Ducks in different rivers, and thus to estimate an important feature of habitat quality.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Waterbird Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Energy Values
dc.subject
Feeding Habits
dc.subject
Food Availability
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Habitat Quality Evaluation
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Merganetta Armata
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Torrent Duck
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Otras Ciencias Biológicas
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Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Prey selection and energy values of main food items of the torrent duck (Merganetta armata) in Northwestern Patagonia, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-05T17:12:25Z
dc.identifier.eissn
1938-5390
dc.journal.volume
37
dc.journal.number
2
dc.journal.pagination
153-161
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Cerón, Geardo Abel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Departamento de Zoología; Argentina
dc.description.fil
Fil: Boy, Claudia Clementina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.journal.title
Waterbirds
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1675/063.037.0204
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.1675/063.037.0204
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