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Trophic and microhabitat niche overlap in two sympatric dendrobatids from La Selva, Costa Rica
(Asociación Herpetológica Argentina, 2010-12)
We studied the trophic ecology of Dendrobates auratus and Oophagapumilio in La Selva Biological Station, Costa Rica. At this site, both dendrobatids are sympatricdue to the introduction and naturalization of D. auratus ...
Contribución al conocimiento del paisaje de cacaotales, como hábitat para el mantenimiento de la diversidad de herpetofauna en Talamanca, Costa Rica
(2009-08-08)
En las últimas décadas la modificación de las superficies boscosas con fines productivos y otros factores que son causas en la pérdida de biodiversidad se vienen acentuando. Actualmente, existen sistemas productivos ...
Tadpole begging reveals high quality
(2017)
Parents can benefit from allocating limited resources non randomly among offspring, and offspring solicitation (i.e. begging) is often hypothesized to evolve because it contains information valuable to choosy parents. We ...
Empirical evidence for multiple costs of begging in poison frog tadpoles
(2018)
In recent decades, theoretical and empirical work has investigated the relative roles of costs and benefits in inhibiting excessive displays of begging to parents. Whether costs are important in maintaining reliability of ...
Larval aggression is independent of food limitation in nurseries of a poison frog
(2016)
Aggression between nurserymates is common in animals and often hypothesized to result from proximate resource limita- tion. In numerous terrestrial frogs, larvae develop in phytotelmata, tiny water bodies where resources ...
Developmental morphology of granular skin glands in pre-metamorphic egg-eating poison frogs
(2017)
Parents in many taxa, including insects, mol- luscs, fish, snakes, and amphibians provision chemical defences, such as peptides, steroids, or alkaloids to their offspring to reduce the risk of predation. In most cases, ...
Convergent evolution of neo-functionalized duplications of ATP1A1 in dendrobatid and grass frogs
(Universidad de los AndesMaestría en Ciencias BiológicasFacultad de CienciasDepartamento de Ciencias Biológicas, 2022-06-17)
Gene duplication followed by adaptive divergence is an important source of molecular novelty and thus evolutionary innovation. Gene duplication followed by neofunctionalization can create a tension between natural selection ...
Patterns of second‐to‐fourth digit length ratios (2D:4D) in two species of frogs and two species of lizards at La Selva, Costa Rica
(2012)
It is now well documented that androgen and estrogen signaling dur-
ing early development cause a sexual dimorphism in second-to-fourth digit length ratio (2D:4D). It is also well documented that males of mam- malian ...