Avian physiological ecology: old questions, new systems and new approaches Fisiología ecológica de aves: preguntas viejas, sistemas y aproximaciones nuevas by FRANCISCO BOZINOVIC, CARLOS MARTINEZ DEL RIO

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Seasonal changes in the use of marine food resources by Cinclodes nigrofumosus (furnariidae, aves): carbon isotopes and osmoregulatory physiology Cambios estacionales en el uso de... by PABLO SABAT, CARLOS MARTÍNEZ DEL RÍO

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Parasitismo floral por abejas sociales (Meliponinae; Apidae) en el árbol quiropterófilo <em>Crescentia alata</em> (Bignoniaceae) by Carlos Martínez del Río, Stephen H. Bullock

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Using stable isotopes in hummingbird breath to estimate reliance on supplemental feeders by Nathan Wolf, T. Scott Smeltz, Craig Cook, Carlos Martinez del Rio

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Modeling the distribution of Norway rats (Rattus norvegicus) on offshore islands in the Falkland Islands by Michael A. Tabak, Sally Poncet, Ken Passfield, Carlos Martinez del Rio

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Isotopic incorporation rates and discrimination factors in mantis shrimp crustaceans. by Maya S deVries, Carlos Martínez Del Rio, Tate S Tunstall, Todd E Dawson

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Effects of trophic level and metamorphosis on discrimination of hydrogen isotopes in a plant-herbivore system. by Jacob M Peters, Nathan Wolf, Craig A Stricker, Timothy R Collier, Carlos Martínez del Rio

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Sucrose digestion capacity in birds shows convergent coevolution with nectar composition across continents by Todd J. McWhorter, Jonathan A. Rader, Jorge E. Schondube, Susan W. Nicolson, Berry Pinshow, Patricia A. Fleming, Yocelyn T. Gutiérrez-Guerrero, Carlos Martínez del Rio

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