Romina Ghirardi

Romina Ghirardi
Instituto Nacional de Limnología (INALI) · Laboratorio de Herpetología

Dr. en Ciencias Naturales

About

40
Publications
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343
Citations
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April 2007 - present
Instituto Nacional de Limnología (INALI)
Position
  • Dr. en Ciencias Naturales

Publications

Publications (40)
Article
Water moulds are pathogens of amphibian eggs and embryos. However, little is known about oxidant or antioxidant status of amphibians in response to stress caused by water moulds. We exposed embryo stages of two-coloured oval frogs Elachistocleis bicolor (Guérin-Méneville, 1838) to Saprolegnia -like sp. water mould in order to explore homeostatic ad...
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Boana pulchella habita principalmente climas templados y B. punctata principalmente climas tropicales, lo que permitiría suponer la presencia de estrategias reproductivas diferentes, aún en la región en la que sus poblaciones son simpátricas. En el presente estudio se analizaron y compararon los ciclos reproductivos, parámetros reproductivos y desa...
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In September 2005, the IUCN Species Survival Commission (SSC) held a summit for the conservation of amphibians where specialists from around the world agreed that, in addition to the need to document the declines and extinctions, we need to promote action strategies designed to respond to the global biodiversity crisis. The outcome of this summit w...
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El público general desconoce que la República Argentina es uno de los países con mayor diversidad de anfibiosen América Latina, presentando unas 175 especies, con una gran proporción de endemismos, ciclos de vidaúnicos y adaptaciones fisiológicas y/o comportamentales a ambientes extremos (entre otras). La visión generales que la diversidad de anfib...
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Infections by water molds of the genus Saprolegnia (Oomycetes) have been associated with the death of eggs and embryos in many anuran species; however, how water molds induce physiological responses in early and susceptible developmental stages of anurans is poorly known. To assess whether or not embryos of Physalaemus albonotatus (immobile and sus...
Article
We present the first data on age structure, growth pattern, and lines of arrested growth (LAG) for Leptodactylus latrans in temperate wetlands. Based on these data, we estimate LAG periodicity, age, size at sexual maturity and longevity for this species. We also tested for differences of these parameters between sexes. The age was determined throug...
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Analizamos los patrones espacio-temporales y comportamiento de forrajeo de la rana mirmecófaga Elachistocleis bicolor. Delimitamos diez cuadrantes de 1 m2 en los que registramos el número de ranas, distancia entre individuos y comportamiento a intervalos de media hora durante nueve días. Utilizando modelos lineales mixtos generalizados evaluamos el...
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Habitat destruction and alteration are among the major causes of worldwide amphibian declines. Resource limitation in altered environments can potentially affect trophic ecology of amphibians and contribute to decline. In this work, we analyzed changes in resource availability and use, and the population abundance of eight amphibian species from si...
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Albinism is a rare congenital and inherited condition characterized by an alteration in the amount and distribu-tion of dermal pigment via recessive allele expression that causes an enzyme deficiency involving the metabolism of melanin during prenatal development. Phenotypically, this condition is expressed as: (a) total albinism: absence of melani...
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Se reporta la presencia de Batrachochytrium dendrobatidis en Hypsiboas pulchellus del Parque Nacional Islas de Santa Fe
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Hypsiboas punctatus (Schneider 1799) has a wide distribution in South America, throughout a latitudinal and environmental gradient (tropical/temperate), thus, supporting significantly different pressures among populations. Until now, only tropical populations’ reproductive parameters have been recorded. Then, our goal was to study reproductive para...
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Infections caused by the chytrid fungus Batrachochytrium dendrobatidis (Bd) have been highlighted as a driver of worldwide amphibian declines. In austral temperate wetlands of South America, anurans are exposed to stressors that can increase the negative effects of emerging infectious diseases. We assessed the presence of Bd infecting anurans from...
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Full-text available
Hypsiboas punctatus (Schneider 1799) has a wide distribution in South America, throughout a latitudinal and environmental gradient (tropical/temperate), thus, supporting significantly different pressures among populations. Until now, only tropical populations' reproductive parameters have been recorded. Then, our goal was to study reproductive para...
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Full-text available
Revisamos el método utilizado para determinar especies amenazadas en la Argentina, con los objetivos de: (1) que pueda ser empleado consistentemente por diferentes personas reduciendo la subjetividad, (2) brindar una guía sobre cómo evaluar los factores que conducen al riesgo de extinción, (3) proporcionar a los usuarios de listas rojas una mejor c...
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Chytridiomycosis, a disease caused by the chytrid fungus Batrachochytrium dendrobatidis (B.d.), is recognized as one of the major factors of amphibian decline. Global trade of amphibians has been identified as one of the causes of B.d. spread, involving hundreds of species world wide. In this work we detected the presence of B.d. through histologic...
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Full-text available
Chytridiomycosis, a disease caused by the chytrid fungus Batrachochytrium dendrobatidis (B.d.), is recognized as one of the major factors of amphibian decline. Global trade of amphibians has been identified as one of the causes of B.d. spread, involving hundreds of species world wide. In this work we detected the presence of B.d. through histologic...
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Full-text available
The ability to develop reversible dermal extensions on the lower jaw in some South American characiform fishes has been proposed as a way to optimize the performance of aquatic surface respiration (ASR) during hypoxic conditions. These structures are formed by edema of the hypodermal tissues and can develop in a large proportion of individuals inha...
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Some South American freshwater fishes can improve their capability of aquatic surface respiration (ASR) by developing dermal lip protuberances in the lower jaw. This adaptation was thought to be limited to omnivorous or herbivorous fishes. The present work provides the first evidence that juveniles of a piscivorous characid, Salminus brasiliensis,...
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Argentina is the country with the most geographically extended biological invasion of the American bullfrog (Lithobates catesbeianus) in South America after Brazil. Here, we used a maximum entropy ecological niche modeling algorithm (using records of the native range of American bullfrog) to project the model onto the whole of Argentina. We determi...
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The seasonality of amphibian activity is a long studied and recognized feature but generally includes only the analysis of adult calling males. In this study, seasonal variation in abundance of a whole assemblage (adults and juveniles), coexistence patterns and phenology were analyzed in a community of 16 amphibian species inhabiting lowland river...
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Within the last two decades Batrachochytrium dendrobatidis (B.d.), the causative agent of chytridiomycosis, seems to have become a pandemic parasite, and is proposed as one of the more important causes of amphibian declines worldwide. In Argentina, the first report was in 2002 in Leptodactylus ocellatus. Since then, the fungus has expanded through...
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The study of the feeding ecology of amphibians is an old issue in herpetology. Notwithstanding, the lack of food resources data in many studies of amphibians feeding has lead to partial understanding of frog feeding strategies. In this study we evaluate the trophic selectivity of a red spotted green frog (Hypsiboas punctatus) population from a Midd...
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Full-text available
Some South American freshwater fishes can improve their capability of aquatic surface respiration (ASR) by developing dermal lip protuberances in the lower jaw. This adaptation was thought to be limited to omnivorous or herbivorous fishes. The present work provides the first evidence that juveniles of a piscivorous characid, Salminus brasiliensis,...
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Full-text available
Many amphibian larvae live in turbid and vegetated habitats with very limited visibility. In these habitats, the use of chemical cues for predator detection may be more reliable than visual ones. Odontophrynus americanus tadpoles inhabit floodplain ponds of the middle Paraná River, Argentina, where they frequently encounter low visibility condition...
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Elachistocleis bicolor is a poorly known South American microhylid frog. Although it has been claimed to be an ant specialist, there have been no detailed studies of ontogenetic diet change and prey selectivity in this species. We analysed the diet of 114 individuals of this frog through the post-metamorphic ontogeny. We also studied the anurans' m...
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94 El 2 de febrero de 2006, durante el proceso de recolección de huevos dentro del Programa de reintroducción del Cocodrilo del Orinoco (Crocodylus intermedius) en los Llanos de Venezuela, se encontraron fortuitamente 30 huevos correspondientes a un número indeterminado de puestas de Terecay (Podocnemis unifilis). La puesta se encontró en las orill...

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