ROMINA GHIRARDI | Instituto Nacional de Limnología (CONICET-UNL) (original) (raw)

Papers by ROMINA GHIRARDI

Cuadernos de Herpetología, 2018

A partir del aporte de una red local de especialistas en diversas tematicas se ha generado un doc... more A partir del aporte de una red local de especialistas en diversas tematicas se ha generado un documentobase que sirva como guia para el desarrollo de iniciativas de conservacion de los anfibios de Argentina. Este documento constituye el punto de partida para el diseno y consolidacion de programas y proyectos especificos cuyas metas acciones puedan ser mensuradas y evaluadas periodicamente. Producto de este proceso, se concreto el presente Plan de Accion para la Conservacion de los Anfibios de la Republica Argentina que resena un conjunto de 47 acciones que responden a 18 problematicas identificadas, agrupadas en 6 componentes que pueden acometerse en plazos preestablecidos. El Plan propone ejecutar estas acciones que los especialistas convocados han considerado prioritarias o necesarias, aunque ello no implica que constituya un Plan que haya agotado y evaluado todos los problemas y acciones posibles para la conservacionde los anfibios de la Republica Argentina. Este Plan tiene como ...

Boana pulchella habita principalmente climas templados y B. punctata principalmente climas tropic... more 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 desarrollo de cuerpos grasos (CG) de Boana pulchella y B. punctata en humedales templados del río Paraná Medio. Boana pulchella presentó óvulos maduros de marzo a diciembre. En machos no hubo variación del volumen testicular a lo largo del año y el mayor desarrollo de CG de los machos se observó en invierno. Esta especie presentó un patrón reproductivo continuo. La vitelogénesis de B. punctata se inició en enero, alcanzando el mayor desarrollo ovárico en febrero (verano) y decreciendo hacia mayo (otoño). Los machos presentaron crecimiento testicular en verano, decreciendo hacia otoño y los CG presentaron su máximo desarrollo en enero para ambo...

Fig. 3. An individual of S. brasiliensis exhibiting the lip extension (left), and another individ... more Fig. 3. An individual of S. brasiliensis exhibiting the lip extension (left), and another individual showing typical lip morphology (rigth). Both fishes show a similar mouth opening. Protuberances can be seen in both jaws covering the tooth rows, which are evident in the individual with typical lip morphology. Scale bar = 1 cm.

Fig. 7. Relative position of the mouth corner in the water column during ASR in an individual of ... more Fig. 7. Relative position of the mouth corner in the water column during ASR in an individual of S. brasiliensis with typical lip (a) and another with lip protuberances (b). The drawing represents individuals with smaller mouth opening than those of Fig. 1, so that lateral lobes of the protuberance come in contact to cover the sides of the mouth.

Fig. 6. Relationship between MLW (maximum lip width) and water dissolved oxygen. Values of lip si... more Fig. 6. Relationship between MLW (maximum lip width) and water dissolved oxygen. Values of lip size are expressed as proportions of standard length of the body.

Fil: Akmentins, Mauricio Sebastian. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andi... more Fil: Akmentins, Mauricio Sebastian. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina

Fil: Lopez, Javier Alejandro. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro ... more Fil: Lopez, Javier Alejandro. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Santa Fe. Instituto Nacional de Limnologia. Universidad Nacional del Litoral. Instituto Nacional de Limnologia; Argentina

Cuadernos de Herpetología, 2014

Se reporta la presencia de Batrachochytrium dendrobatidis en Hypsiboas pulchellus del Parque Naci... more Se reporta la presencia de Batrachochytrium dendrobatidis en Hypsiboas pulchellus del Parque Nacional Islas de Santa Fe

Amphibia-Reptilia, 2017

We present the first data on age structure, growth pattern, and lines of arrested growth (LAG) fo... more We present the first data on age structure, growth pattern, and lines of arrested growth (LAG) forLeptodactylus latransin 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 through skeletochronology. Female maturity was determined by presence of differentiated ova, while male maturity was assessed through histological analysis to evaluate spermatozoid production. To establish whether this species marks one LAG per year, eight individuals were kept one year in captivity. For each specimen, LAG was compared for different phalanges of the same toe clipped at start and end of captivity.Leptodactylus latransmarked one LAG per year, indicating a growth rhythm adjusted to a seasonal environment and mainly driven by genetic factors. Longevity was five years for both sexes and frogs reached sexual maturity during the first ye...

The Herpetological …, 2007

Cuadernos de Herpetología, Aug 1, 2018

Caldasia, 2017

Analizamos los patrones espacio-temporales y comportamiento de forrajeo de la rana mirmecófaga El... more 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 poder explicativo de las variables: temperaturas diarias máximas, mínimas y medias, temperatura de microhábitat, humedad relativa, presión atmosférica, días transcurridos desde la última lluvia y pluviosidad acumulada en las últimas 48 horas, sobre la actividad de las ranas. Las variables que mejor explicaron la actividad de las ranas fueron: presión atmosférica media, días desde la última lluvia y pluviosidad acumulada. Las ranas mostraron un patrón de distribución agregado durante el forrajeo (índice estandarizado de Morisita = 0,501). La distancia media entre ranas fue 47,53±25,28 mm. Las ranas exhibieron un comportamiento de forrajeo ...

Revista de Biología Tropical, 2009

The study of the feeding ecology of amphibians is an old issue in herpetology. Notwithstanding, t... more 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 Middle Paraná River floodplain pond in Argentina, and discuss the importance of prey availability data when interpreting results from diet analysis. We analyzed the gut contents of 47 H. punctatus adults and compared frog's diet with the environmental food resources. Prey availability was estimated by systematically seep-netting the microhabitat where anurans were localized foraging. We identified 33 taxonomic categories from gastrointestinal contents. Numerically, the most important prey categories were dipterans, followed by hemipterans, homopterans and coleopterans. The diet similarity between males and females was high and no statistic...

Abstract: The study of the feeding ecology of amphibians is an old issue in herpetology. Notwiths... more Abstract: 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 feed-ing strategies. In this study we evaluate the trophic selectivity of a red spotted green frog (Hypsiboas punctatus) population from a Middle Paraná River floodplain pond in Argentina, and discuss the importance of prey avail-ability data when interpreting results from diet analysis. We analyzed the gut contents of 47 H. punctatus adults and compared frog’s diet with the environmental food resources. Prey availability was estimated by systemati-cally seep-netting the microhabitat where anurans were localized foraging. We identified 33 taxonomic catego-ries from gastrointestinal contents. Numerically, the most important prey categories were dipterans, followed by hemipterans, homopterans and coleopterans. The diet similarity between males and females was high and no...

Cuadernos de Herpetología, 2021

In this work, we report the amphibian fauna composition of a natural protected area locatednear E... more In this work, we report the amphibian fauna composition of a natural protected area locatednear Esperanza city, Province of Santa Fe, Argentina. It opened to the public in 2015, with yetno baseline inventory of amphibian species. Additionally, we evaluated the presence of the amphibianparasitic fungus Batrachochytrium dendrobatidis (Bd). We carried out eleven samplingsfrom October 2015 to March 2016 in three environmental units: native forest, exotic forest,and floodplain grasslands. The sampling methods we used were live pit-fall traps with driftfences, auditory encounters, and visual encounters. Sixteen species belonging to 9 genera and4 families were recorded. October was the month with the highest specific richness. Bd-specificreal-time Taqman qPCR made on skin swabs made on 11 species were all negative. Even small,the amphibian species identified in the protected area represent ca. 30% of the anurans alreadyreported for Santa Fe, and 9% of the Argentinean batracofauna.

Herpetological Journal, 2014

Fil: Ghirardi, Romina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientif... more Fil: Ghirardi, Romina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Santa Fe. Instituto Nacional de Limnologia. Universidad Nacional del Litoral. Instituto Nacional de Limnologia; Argentina

Cuadernos de Herpetología, 2018

A partir del aporte de una red local de especialistas en diversas tematicas se ha generado un doc... more A partir del aporte de una red local de especialistas en diversas tematicas se ha generado un documentobase que sirva como guia para el desarrollo de iniciativas de conservacion de los anfibios de Argentina. Este documento constituye el punto de partida para el diseno y consolidacion de programas y proyectos especificos cuyas metas acciones puedan ser mensuradas y evaluadas periodicamente. Producto de este proceso, se concreto el presente Plan de Accion para la Conservacion de los Anfibios de la Republica Argentina que resena un conjunto de 47 acciones que responden a 18 problematicas identificadas, agrupadas en 6 componentes que pueden acometerse en plazos preestablecidos. El Plan propone ejecutar estas acciones que los especialistas convocados han considerado prioritarias o necesarias, aunque ello no implica que constituya un Plan que haya agotado y evaluado todos los problemas y acciones posibles para la conservacionde los anfibios de la Republica Argentina. Este Plan tiene como ...

Boana pulchella habita principalmente climas templados y B. punctata principalmente climas tropic... more 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 desarrollo de cuerpos grasos (CG) de Boana pulchella y B. punctata en humedales templados del río Paraná Medio. Boana pulchella presentó óvulos maduros de marzo a diciembre. En machos no hubo variación del volumen testicular a lo largo del año y el mayor desarrollo de CG de los machos se observó en invierno. Esta especie presentó un patrón reproductivo continuo. La vitelogénesis de B. punctata se inició en enero, alcanzando el mayor desarrollo ovárico en febrero (verano) y decreciendo hacia mayo (otoño). Los machos presentaron crecimiento testicular en verano, decreciendo hacia otoño y los CG presentaron su máximo desarrollo en enero para ambo...

Fig. 3. An individual of S. brasiliensis exhibiting the lip extension (left), and another individ... more Fig. 3. An individual of S. brasiliensis exhibiting the lip extension (left), and another individual showing typical lip morphology (rigth). Both fishes show a similar mouth opening. Protuberances can be seen in both jaws covering the tooth rows, which are evident in the individual with typical lip morphology. Scale bar = 1 cm.

Fig. 7. Relative position of the mouth corner in the water column during ASR in an individual of ... more Fig. 7. Relative position of the mouth corner in the water column during ASR in an individual of S. brasiliensis with typical lip (a) and another with lip protuberances (b). The drawing represents individuals with smaller mouth opening than those of Fig. 1, so that lateral lobes of the protuberance come in contact to cover the sides of the mouth.

Fig. 6. Relationship between MLW (maximum lip width) and water dissolved oxygen. Values of lip si... more Fig. 6. Relationship between MLW (maximum lip width) and water dissolved oxygen. Values of lip size are expressed as proportions of standard length of the body.

Fil: Akmentins, Mauricio Sebastian. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andi... more Fil: Akmentins, Mauricio Sebastian. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina

Fil: Lopez, Javier Alejandro. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro ... more Fil: Lopez, Javier Alejandro. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Santa Fe. Instituto Nacional de Limnologia. Universidad Nacional del Litoral. Instituto Nacional de Limnologia; Argentina

Cuadernos de Herpetología, 2014

Se reporta la presencia de Batrachochytrium dendrobatidis en Hypsiboas pulchellus del Parque Naci... more Se reporta la presencia de Batrachochytrium dendrobatidis en Hypsiboas pulchellus del Parque Nacional Islas de Santa Fe

Amphibia-Reptilia, 2017

We present the first data on age structure, growth pattern, and lines of arrested growth (LAG) fo... more We present the first data on age structure, growth pattern, and lines of arrested growth (LAG) forLeptodactylus latransin 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 through skeletochronology. Female maturity was determined by presence of differentiated ova, while male maturity was assessed through histological analysis to evaluate spermatozoid production. To establish whether this species marks one LAG per year, eight individuals were kept one year in captivity. For each specimen, LAG was compared for different phalanges of the same toe clipped at start and end of captivity.Leptodactylus latransmarked one LAG per year, indicating a growth rhythm adjusted to a seasonal environment and mainly driven by genetic factors. Longevity was five years for both sexes and frogs reached sexual maturity during the first ye...

The Herpetological …, 2007

Cuadernos de Herpetología, Aug 1, 2018

Caldasia, 2017

Analizamos los patrones espacio-temporales y comportamiento de forrajeo de la rana mirmecófaga El... more 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 poder explicativo de las variables: temperaturas diarias máximas, mínimas y medias, temperatura de microhábitat, humedad relativa, presión atmosférica, días transcurridos desde la última lluvia y pluviosidad acumulada en las últimas 48 horas, sobre la actividad de las ranas. Las variables que mejor explicaron la actividad de las ranas fueron: presión atmosférica media, días desde la última lluvia y pluviosidad acumulada. Las ranas mostraron un patrón de distribución agregado durante el forrajeo (índice estandarizado de Morisita = 0,501). La distancia media entre ranas fue 47,53±25,28 mm. Las ranas exhibieron un comportamiento de forrajeo ...

Revista de Biología Tropical, 2009

The study of the feeding ecology of amphibians is an old issue in herpetology. Notwithstanding, t... more 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 Middle Paraná River floodplain pond in Argentina, and discuss the importance of prey availability data when interpreting results from diet analysis. We analyzed the gut contents of 47 H. punctatus adults and compared frog's diet with the environmental food resources. Prey availability was estimated by systematically seep-netting the microhabitat where anurans were localized foraging. We identified 33 taxonomic categories from gastrointestinal contents. Numerically, the most important prey categories were dipterans, followed by hemipterans, homopterans and coleopterans. The diet similarity between males and females was high and no statistic...

Abstract: The study of the feeding ecology of amphibians is an old issue in herpetology. Notwiths... more Abstract: 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 feed-ing strategies. In this study we evaluate the trophic selectivity of a red spotted green frog (Hypsiboas punctatus) population from a Middle Paraná River floodplain pond in Argentina, and discuss the importance of prey avail-ability data when interpreting results from diet analysis. We analyzed the gut contents of 47 H. punctatus adults and compared frog’s diet with the environmental food resources. Prey availability was estimated by systemati-cally seep-netting the microhabitat where anurans were localized foraging. We identified 33 taxonomic catego-ries from gastrointestinal contents. Numerically, the most important prey categories were dipterans, followed by hemipterans, homopterans and coleopterans. The diet similarity between males and females was high and no...

Cuadernos de Herpetología, 2021

In this work, we report the amphibian fauna composition of a natural protected area locatednear E... more In this work, we report the amphibian fauna composition of a natural protected area locatednear Esperanza city, Province of Santa Fe, Argentina. It opened to the public in 2015, with yetno baseline inventory of amphibian species. Additionally, we evaluated the presence of the amphibianparasitic fungus Batrachochytrium dendrobatidis (Bd). We carried out eleven samplingsfrom October 2015 to March 2016 in three environmental units: native forest, exotic forest,and floodplain grasslands. The sampling methods we used were live pit-fall traps with driftfences, auditory encounters, and visual encounters. Sixteen species belonging to 9 genera and4 families were recorded. October was the month with the highest specific richness. Bd-specificreal-time Taqman qPCR made on skin swabs made on 11 species were all negative. Even small,the amphibian species identified in the protected area represent ca. 30% of the anurans alreadyreported for Santa Fe, and 9% of the Argentinean batracofauna.

Herpetological Journal, 2014

Fil: Ghirardi, Romina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientif... more Fil: Ghirardi, Romina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Santa Fe. Instituto Nacional de Limnologia. Universidad Nacional del Litoral. Instituto Nacional de Limnologia; Argentina