Resumo
The predation on vertebrates by birds, including bats, is very common in some families (Accipitridae, Falconidae, Tytonidae, Strigidae), constituting their main diet. For other families (except those that feed strictly on fish), it is occasional and sometimes a matter of opportunity. Here we recorded the predation on a bat (Platyrrhinus lineatus) by the neotropical bird plush-crested jay (Cyanocorax chrysops). On July 26, 2009, around 11:00 am, we recorded an individual of C. chrysops taking part of a P. lineatus on its beak. This record occurred on Jacarezinho Farm (Valparaiso SP). The prey species identification was done by visual observation, considering the bat size and its external morphology, especially by the presence of the white dorsal bright stripe. Probably, Platyrrhinus lineatus behavior, which involves living together or in couples on tree canopies, made the capture by the plush-crested jay easier. This is a new record for the diet of C. chrysops and highlights the necessity of additional studies related to birds diet in the Neotropics, even the more conspicuous ones.
Resumo
Chromosomes have been a useful tool to address systematical issues of Neotropical bats and can be applied to evaluate certain degrees of radiation exposure, but some basic cytogenetical data is needed in this case. Nothing is known about cytogenetics of bats from the zone of influence of nuclear power plants around the world. In this study we present the karyotypic composition of the first bat sample collected in the surroundings of the only Brazilian nuclear complex, which is located in a very important remnant of Atlantic Forest in southwestern Rio de Janeiro. The following diploid numbers and fundamental numbers of autosomal arms were found: Artibeus lituratus; 31, 56, Artibeus obscurus; 31, 56, Carollia perspicillata; 21, 36, Platyrrhinus lineatus; 30, 56, Sturnira lilium; 30, 56, Eptesicus brasiliensis; 50, 48. Silver stained nucleolar organizer regions (Ag-NORs) are located in short arm telomers of submetacentric or subtelocentric autosomes in all cases, excluding C. perspicillata, which showed Ag-NORs in the X chromosome. Constitutive heterochromatin in all species except E. brasiliensis is mostly pericentromeric, but telomeric and interstitial bands are also found, as well as completely heterochromatic sex chromosomes. New C-banding patterns were detected for the two species of Artibeus improving the known karyotipical variability in these species. This data is a first
Resumo
The predation on vertebrates by birds, including bats, is very common in some families (Accipitridae, Falconidae, Tytonidae, Strigidae), constituting their main diet. For other families (except those that feed strictly on fish), it is occasional and sometimes a matter of opportunity. Here we recorded the predation on a bat (Platyrrhinus lineatus) by the neotropical bird plush-crested jay (Cyanocorax chrysops). On July 26, 2009, around 11:00 am, we recorded an individual of C. chrysops taking part of a P. lineatus on its beak. This record occurred on Jacarezinho Farm (Valparaiso SP). The prey species identification was done by visual observation, considering the bat size and its external morphology, especially by the presence of the white dorsal bright stripe. Probably, Platyrrhinus lineatus behavior, which involves living together or in couples on tree canopies, made the capture by the plush-crested jay easier. This is a new record for the diet of C. chrysops and highlights the necessity of additional studies related to birds diet in the Neotropics, even the more conspicuous ones.
Resumo
Chromosomes have been a useful tool to address systematical issues of Neotropical bats and can be applied to evaluate certain degrees of radiation exposure, but some basic cytogenetical data is needed in this case. Nothing is known about cytogenetics of bats from the zone of influence of nuclear power plants around the world. In this study we present the karyotypic composition of the first bat sample collected in the surroundings of the only Brazilian nuclear complex, which is located in a very important remnant of Atlantic Forest in southwestern Rio de Janeiro. The following diploid numbers and fundamental numbers of autosomal arms were found: Artibeus lituratus; 31, 56, Artibeus obscurus; 31, 56, Carollia perspicillata; 21, 36, Platyrrhinus lineatus; 30, 56, Sturnira lilium; 30, 56, Eptesicus brasiliensis; 50, 48. Silver stained nucleolar organizer regions (Ag-NORs) are located in short arm telomers of submetacentric or subtelocentric autosomes in all cases, excluding C. perspicillata, which showed Ag-NORs in the X chromosome. Constitutive heterochromatin in all species except E. brasiliensis is mostly pericentromeric, but telomeric and interstitial bands are also found, as well as completely heterochromatic sex chromosomes. New C-banding patterns were detected for the two species of Artibeus improving the known karyotipical variability in these species. This data is a first