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dc.contributor.author
Cadierno, María Pilar  
dc.contributor.author
Burela, Silvana  
dc.contributor.author
Dreon, Marcos Sebastian  
dc.contributor.author
Martín, Pablo Rafael  
dc.contributor.author
Heras, Horacio  
dc.date.available
2018-12-21T20:10:12Z  
dc.date.issued
2017-10  
dc.identifier.citation
Cadierno, María Pilar; Burela, Silvana; Dreon, Marcos Sebastian; Martín, Pablo Rafael; Heras, Horacio; The influence of energy, nutritional value and noxiousness of prey in sex- and size-biased predation by Snail Kites in southern South America ; Csiro Publishing; Emu; 117; 4; 10-2017; 382-387  
dc.identifier.issn
0158-4197  
dc.identifier.uri
http://hdl.handle.net/11336/66942  
dc.description.abstract
Snail Kites (Rostrhamus sociabilis) feed almost exclusively on Apple Snails (Pomacea spp.). While field observations indicate they discard the noxious albumen gland (AG) when feeding on female snails, there is no information on the energy lost by this behaviour, the gland composition, or whether there are associated snail sex preferences. We addressed, for the first time, these aspects for Snail Kites foraging on Pomacea canaliculata in southern South America. The whole snail’s biochemical composition exhibited significant differences between sexes. Proteins and carbohydrates were the major energy-providing components. Soft parts provide ~2.91 ± 0.16 and 2.50 ± 0.14 Kcal g−1 dry weight (dw) for male and female without the AG, respectively, while the AG accounts for 15% of available energy. The size and sex of prey consumed, determined at foraging perches sampled monthly, showed that Snail Kites preferentially fed on the largest snails available throughout the sampling period. Even though the remains of the female body without the AG have less energy than males, sex preferential predation towards females was observed. Our study demonstrates, for the first time, the optimal foraging trade-off between prey size/sex and nutrition/energy in Snail Kites. After discarding the AG, male and female snails of equivalent size provide different nutrients and energy, though Snail Kite foraging is generally biased towards females mostly as a result of their larger size, suggesting that Snail Kites are unable to distinguish between the sexes.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Csiro Publishing  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Ampullariid  
dc.subject
Energetics  
dc.subject
Feeding Strategy  
dc.subject
Foraging Habit  
dc.subject
Molluscs  
dc.subject.classification
Otras Ciencias Biológicas  
dc.subject.classification
Ciencias Biológicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
The influence of energy, nutritional value and noxiousness of prey in sex- and size-biased predation by Snail Kites in southern South America   
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-11-20T15:17:20Z  
dc.journal.volume
117  
dc.journal.number
4  
dc.journal.pagination
382-387  
dc.journal.pais
Australia  
dc.journal.ciudad
Collingwood  
dc.description.fil
Fil: Cadierno, María Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; Argentina  
dc.description.fil
Fil: Burela, Silvana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina  
dc.description.fil
Fil: Dreon, Marcos Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; Argentina  
dc.description.fil
Fil: Martín, Pablo Rafael. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina  
dc.description.fil
Fil: Heras, Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina  
dc.journal.title
Emu  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/01584197.2017.1338113?journalCode=temu20  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1080/01584197.2017.1338113