On 31 July 2019, a Green Frog (Lithobates clamitans) was observed consuming a Big Brown Bat (Epte... more On 31 July 2019, a Green Frog (Lithobates clamitans) was observed consuming a Big Brown Bat (Eptesicus fuscus) at Meux Creek, Neustadt, Ontario. The bat was likely roosting at a nearby undercut bank when it was predated by the frog, which required nearly 90 min to consume its prey. This is the first record of a Green Frog consuming a bat species in Canada.
RBRHRevista Brasileira de Recursos Hídricos Volume 15 n. 1 Jan/Mar 2010, 47-66 47 Tendências na ... more RBRHRevista Brasileira de Recursos Hídricos Volume 15 n. 1 Jan/Mar 2010, 47-66 47 Tendências na Análise de Impactos da Implementação de Barragens: Lições do Estudo de Caso das Barragens de Uso Múltiplo da Bacia do Rio Santa Maria Rafael Cabral Cruz Campus de São ...
River fragmentation is one of the greatest challenges on environmental planning at the light of w... more River fragmentation is one of the greatest challenges on environmental planning at the light of water resources management. The need for dams for hydropower generation, irrigation and public water supply, results in increasing pressure on the ecological integrity of water bodies. This paper proposes a methodology to measure the environmental losses caused by river fragmentation by accounting the change in the value of the so called environmental fragility. The Index of Environmental Losses by River Fragmentation (a non-monetary index) was applied in the Upper and Middle Uruguay River basin, located partially in the states of Santa Catarina and Rio Grande do Sul, in the FRAG-RIO Project study area. The results show that the index could account the portions of rivers more susceptible to fragmentation, enriching the discussion and providing guidelines for the environmental planning of the Uruguay River basin
The state of conservation of Atlantic Forest in the Maquiné river basin was assessed using land c... more The state of conservation of Atlantic Forest in the Maquiné river basin was assessed using land cover data obtained from Landsat TM 5 satellite imagery (October 1995). The initial analysis examined the distribution of the relative areas of each land-cover type according to landscape slope classes, potential vegetation zones, and a 90 m riparian buffer. Land-cover classes were then regrouped into categories representing "low", "intermediate", and "high" degree of anthropogenic alteration. Results indicate that about 70% of the land cover of the Maquiné river basin has been highly altered as a consequence of replacement of natural forests by agriculture. Presently, a recovery process seems to be underway, contrasting with the historical trend towards deforestation. There are large areas of secondary vegetation in intermediate (34.8%) and advanced successional stages (20.2%), particularly across the range of the montane forest and of forest formations that...
Brazilian Archives of Biology and Technology, 2002
Feeding habits of six species of Astyanax from river Maquiné are described. Fishes were sampled b... more Feeding habits of six species of Astyanax from river Maquiné are described. Fishes were sampled bi-monthly from November/95 to September/96 in two zones of the river. Items were identified, counted and had their abundance estimated according to a semi-quantitative scale. Frequency of occurrence, alimentary importance index (IFI) values and a similarity analysis of diets for each species-river zone sample were examined. All the species were considered typically omnivorous, with insects and vegetal matter being the most important items in their diet. These species could act as seed dispersers, particularly for macrophytes. Intra-specific spatial differences were not observed in comparisons of samples from two diferent regions of the river, except for A. fasciatus. The presence of Podostemaceae macrophytes in the mid-course of the river seemed to be important both as an autochthonous food resource and as habitat for several organisms preyed by the Astyanax species.
On 31 July 2019, a Green Frog (Lithobates clamitans) was observed consuming a Big Brown Bat (Epte... more On 31 July 2019, a Green Frog (Lithobates clamitans) was observed consuming a Big Brown Bat (Eptesicus fuscus) at Meux Creek, Neustadt, Ontario. The bat was likely roosting at a nearby undercut bank when it was predated by the frog, which required nearly 90 min to consume its prey. This is the first record of a Green Frog consuming a bat species in Canada.
RBRHRevista Brasileira de Recursos Hídricos Volume 15 n. 1 Jan/Mar 2010, 47-66 47 Tendências na ... more RBRHRevista Brasileira de Recursos Hídricos Volume 15 n. 1 Jan/Mar 2010, 47-66 47 Tendências na Análise de Impactos da Implementação de Barragens: Lições do Estudo de Caso das Barragens de Uso Múltiplo da Bacia do Rio Santa Maria Rafael Cabral Cruz Campus de São ...
River fragmentation is one of the greatest challenges on environmental planning at the light of w... more River fragmentation is one of the greatest challenges on environmental planning at the light of water resources management. The need for dams for hydropower generation, irrigation and public water supply, results in increasing pressure on the ecological integrity of water bodies. This paper proposes a methodology to measure the environmental losses caused by river fragmentation by accounting the change in the value of the so called environmental fragility. The Index of Environmental Losses by River Fragmentation (a non-monetary index) was applied in the Upper and Middle Uruguay River basin, located partially in the states of Santa Catarina and Rio Grande do Sul, in the FRAG-RIO Project study area. The results show that the index could account the portions of rivers more susceptible to fragmentation, enriching the discussion and providing guidelines for the environmental planning of the Uruguay River basin
The state of conservation of Atlantic Forest in the Maquiné river basin was assessed using land c... more The state of conservation of Atlantic Forest in the Maquiné river basin was assessed using land cover data obtained from Landsat TM 5 satellite imagery (October 1995). The initial analysis examined the distribution of the relative areas of each land-cover type according to landscape slope classes, potential vegetation zones, and a 90 m riparian buffer. Land-cover classes were then regrouped into categories representing "low", "intermediate", and "high" degree of anthropogenic alteration. Results indicate that about 70% of the land cover of the Maquiné river basin has been highly altered as a consequence of replacement of natural forests by agriculture. Presently, a recovery process seems to be underway, contrasting with the historical trend towards deforestation. There are large areas of secondary vegetation in intermediate (34.8%) and advanced successional stages (20.2%), particularly across the range of the montane forest and of forest formations that...
Brazilian Archives of Biology and Technology, 2002
Feeding habits of six species of Astyanax from river Maquiné are described. Fishes were sampled b... more Feeding habits of six species of Astyanax from river Maquiné are described. Fishes were sampled bi-monthly from November/95 to September/96 in two zones of the river. Items were identified, counted and had their abundance estimated according to a semi-quantitative scale. Frequency of occurrence, alimentary importance index (IFI) values and a similarity analysis of diets for each species-river zone sample were examined. All the species were considered typically omnivorous, with insects and vegetal matter being the most important items in their diet. These species could act as seed dispersers, particularly for macrophytes. Intra-specific spatial differences were not observed in comparisons of samples from two diferent regions of the river, except for A. fasciatus. The presence of Podostemaceae macrophytes in the mid-course of the river seemed to be important both as an autochthonous food resource and as habitat for several organisms preyed by the Astyanax species.
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