ABSTRACT
Glossophaga soricina soricina (Pallas, 1766) plays an important role in the ecosystems where it is found, taking part in the pollination of hundreds of plant species. Here, we statistically compared 12 external characters of 169 specimens collected in three Brazilian biomes: 82 in the Pantanal (Mato Grosso), 45 in the Atlantic Forest (Ilhéus, Bahia) and 42 in the Caatinga (Chapada Diamantina, Bahia). Each character was analyzed by descriptive and inferential statistics. The t-test didn't detect any differences between males and females of each population. The ANOVA with a posteriori Tukey test showed significant results for all traits (Forearm length, Calcar length, Body length, Tail length, Hindfoot length, Ear length, Tragus length, Thumb length, Noseleaf length, Noseleaf width and Horseshoe width) except for Tibia length. The discriminant analysis showed distinct clusters representing the populations of each biome. The tests demonstrated that the three populations are significantly different from one another and that the specimens of the population from the Caatinga, on average, are larger than those from the Pantanal, which are larger than those from the Atlantic Forest, confirming the possible existence of intra-specific geographic variation.
ABSTRACT
Glossophaga soricina soricina (Pallas, 1766) plays an important role in the ecosystems where it is found, taking part in the pollination of hundreds of plant species. Here, we statistically compared 12 external characters of 169 specimens collected in three Brazilian biomes: 82 in the Pantanal (Mato Grosso), 45 in the Atlantic Forest (Ilhéus, Bahia) and 42 in the Caatinga (Chapada Diamantina, Bahia). Each character was analyzed by descriptive and inferential statistics. The t-test didn't detect any differences between males and females of each population. The ANOVA with a posteriori Tukey test showed significant results for all traits (Forearm length, Calcar length, Body length, Tail length, Hindfoot length, Ear length, Tragus length, Thumb length, Noseleaf length, Noseleaf width and Horseshoe width) except for Tibia length. The discriminant analysis showed distinct clusters representing the populations of each biome. The tests demonstrated that the three populations are significantly different from one another and that the specimens of the population from the Caatinga, on average, are larger than those from the Pantanal, which are larger than those from the Atlantic Forest, confirming the possible existence of intra-specific geographic variation.
ABSTRACT
Glossophaga soricina soricina (Pallas, 1766) plays an important role in the ecosystems where it is found, taking part in the pollination of hundreds of plant species. Here, we statistically compared 12 external characters of 169 specimens collected in three Brazilian biomes: 82 in the Pantanal (Mato Grosso), 45 in the Atlantic Forest (Ilhéus, Bahia) and 42 in the Caatinga (Chapada Diamantina, Bahia). Each character was analyzed by descriptive and inferential statistics. The t-test didn't detect any differences between males and females of each population. The ANOVA with a posteriori Tukey test showed significant results for all traits (Forearm length, Calcar length, Body length, Tail length, Hindfoot length, Ear length, Tragus length, Thumb length, Noseleaf length, Noseleaf width and Horseshoe width) except for Tibia length. The discriminant analysis showed distinct clusters representing the populations of each biome. The tests demonstrated that the three populations are significantly different from one another and that the specimens of the population from the Caatinga, on average, are larger than those from the Pantanal, which are larger than those from the Atlantic Forest, confirming the possible existence of intra-specific geographic variation.
ABSTRACT
A new karyotype of Wiedomys pyrrhorhinus (Wied, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapéu, situated in the northern region of the Chapada Diamantina, state of Bahia. Karyological studies of W. pyrrhorhinus have shown a constant diploid number (2n) of 62 with two different numbers of autosomal arms (FNa): 86 and 90, respectively. The new karyotype revealed 2n = 62 and FNa = 104, being the higher autosomal number found so far for this genus. The X chromosome is a large acrocentric and the Y chromosome is a small acrocentric. The analysis of the karyotype morphology suggests that this new karyotype is more closely related to the previous karyotype with 2n = 62 and FNa = 90, described from Caetité, Bahia State. Further studies, comparing different populations of W. pyrrhorhinus, including molecular approaches, may help to better understand the geographical limits of each population and their phylogenetic relationships in the Caatinga biome
ABSTRACT
A new karyotype of Wiedomys pyrrhorhinus (Wied, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapéu, situated in the northern region of the Chapada Diamantina, state of Bahia. Karyological studies of W. pyrrhorhinus have shown a constant diploid number (2n) of 62 with two different numbers of autosomal arms (FNa): 86 and 90, respectively. The new karyotype revealed 2n = 62 and FNa = 104, being the higher autosomal number found so far for this genus. The X chromosome is a large acrocentric and the Y chromosome is a small acrocentric. The analysis of the karyotype morphology suggests that this new karyotype is more closely related to the previous karyotype with 2n = 62 and FNa = 90, described from Caetité, Bahia State. Further studies, comparing different populations of W. pyrrhorhinus, including molecular approaches, may help to better understand the geographical limits of each population and their phylogenetic relationships in the Caatinga biome
ABSTRACT
A new karyotype of Wiedomys pyrrhorhinus (Wied, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapéu, situated in the northern region of the Chapada Diamantina, state of Bahia. Karyological studies of W. pyrrhorhinus have shown a constant diploid number (2n) of 62 with two different numbers of autosomal arms (FNa): 86 and 90, respectively. The new karyotype revealed 2n = 62 and FNa = 104, being the higher autosomal number found so far for this genus. The X chromosome is a large acrocentric and the Y chromosome is a small acrocentric. The analysis of the karyotype morphology suggests that this new karyotype is more closely related to the previous karyotype with 2n = 62 and FNa = 90, described from Caetité, Bahia State. Further studies, comparing different populations of W. pyrrhorhinus, including molecular approaches, may help to better understand the geographical limits of each population and their phylogenetic relationships in the Caatinga biome
ABSTRACT
The genus Myotis is the most diverse within Vespertilionidae, with about 103 recognized species (Simmons 2005). It is widespread, occurring in Asia, Australia, Europe, and North and South America. In South America, this genus has its greatest diversification (Koopman 1982), but no external morphological specializations that clearly distinguish the species recognized are available (LaVal 1973; López-González et al. 2001).[...]
ABSTRACT
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
ABSTRACT
We report a new karyotype for Macrophyllum macrophyllum, based on one specimen collected nearly 600 km from the type-locality in Bahia State, northeastern Brazil. The new karyotype is described and depicted with conventional Giemsa staining and C-banding. It is characterized by a diploid number (2n) of 34, a fundamental autosomal number (FNa) of 62, and a medium-sized metacentric X chromosome and a small submetacentric Y chromosome. Constitutive heterochromatin is distributed in pericentromeric bands in all chromosomes. Our findings are suggestive of a certain amount of karyotypic variation in the genus when contrasted with the single previous karyological report for M. macrophyllum, which recorded 2n = 32 and FNa = 56.
We report a new karyotype for Macrophyllum macrophyllum, based on one specimen collected nearly 600 km from the type-locality in Bahia State, northeastern Brazil. The new karyotype is described and depicted with conventional Giemsa staining and C-banding. It is characterized by a diploid number (2n) of 34, a fundamental autosomal number (FNa) of 62, and a medium-sized metacentric X chromosome and a small submetacentric Y chromosome. Constitutive heterochromatin is distributed in pericentromeric bands in all chromosomes. Our findings are suggestive of a certain amount of karyotypic variation in the genus when contrasted with the single previous karyological report for M. macrophyllum, which recorded 2n = 32 and FNa = 56.
ABSTRACT
We report a new karyotype for Macrophyllum macrophyllum, based on one specimen collected nearly 600 km from the type-locality in Bahia State, northeastern Brazil. The new karyotype is described and depicted with conventional Giemsa staining and C-banding. It is characterized by a diploid number (2n) of 34, a fundamental autosomal number (FNa) of 62, and a medium-sized metacentric X chromosome and a small submetacentric Y chromosome. Constitutive heterochromatin is distributed in pericentromeric bands in all chromosomes. Our findings are suggestive of a certain amount of karyotypic variation in the genus when contrasted with the single previous karyological report for M. macrophyllum, which recorded 2n = 32 and FNa = 56.
We report a new karyotype for Macrophyllum macrophyllum, based on one specimen collected nearly 600 km from the type-locality in Bahia State, northeastern Brazil. The new karyotype is described and depicted with conventional Giemsa staining and C-banding. It is characterized by a diploid number (2n) of 34, a fundamental autosomal number (FNa) of 62, and a medium-sized metacentric X chromosome and a small submetacentric Y chromosome. Constitutive heterochromatin is distributed in pericentromeric bands in all chromosomes. Our findings are suggestive of a certain amount of karyotypic variation in the genus when contrasted with the single previous karyological report for M. macrophyllum, which recorded 2n = 32 and FNa = 56.
ABSTRACT
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
ABSTRACT
The genus Myotis is the most diverse within Vespertilionidae, with about 103 recognized species (Simmons 2005). It is widespread, occurring in Asia, Australia, Europe, and North and South America. In South America, this genus has its greatest diversification (Koopman 1982), but no external morphological specializations that clearly distinguish the species recognized are available (LaVal 1973; López-González et al. 2001).[...]