Papers by Alfredo Ricardo Langguth Bonino
Zoologia (Curitiba, Impresso), 2009
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Genetica, 2002
Chromosome preparations of 30 specimens of Oryzomys subflavus trapped in eight Brazilian localiti... more Chromosome preparations of 30 specimens of Oryzomys subflavus trapped in eight Brazilian localities were C-, and G-banded and analyzed by fluorescence in situ hybridization (FISH). Two karyotypes were found, 2n = 50/FN = 64, at three coastal localities of the Atlantic Forest domain, and 2n = 58/FN = 70 at two sites located in the Cerrado biome, Brazil Central. Two fluorescence in situ hybridization (FISH) patterns of the telomeric sequence (T2AG3)n were observed: in both karyotypes the probes hybridized to the telomeres of all chromosomes and also a hybridization signal in the centromeric regions of two autosome pairs was seen in the 2n = 50 karyotype. These results, together with the occurrence of other diploid numbers described in the literature, suggest that 0. subflavus is a complex species, bearing fusion/fission rearrangements proper to the different biomes which it inhabits.
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Check List, 2015
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Marine Biodiversity Records, 2015
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Mammalia, 2001
... Dans les cinq localites ou eile a ete collectee, 1'espece O. russatus presente 2n = 80 .... more ... Dans les cinq localites ou eile a ete collectee, 1'espece O. russatus presente 2n = 80 ... Les especes O. laticeps et O. seuanezi, de la cote Atlantique, montrent respectivement 2n = 52 et 2n ... dis-played lower numbers than the number seen in O. nitidus, O. emmonsae, and O. russa-...
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This work aims to compile the current knowledge of the diversity and geographic distribution of t... more This work aims to compile the current knowledge of the diversity and geographic distribution of terrestrial mammals of medium and large size from northeastern Brazil, as well as to discuss some taxonomic issues. We also provide a summary of the history of the study of mammals of northeastern Brazil. The area of this study includes the states of Ceará, Paraíba, Pernambuco and Alagoas. Emphasis was given to the study of preserved specimens in museums. We examined 652 specimens representing 8 orders, 19 families, 32 genera and 40 species. Subspecies were considered as possible since the current use reflects more the story of the taxa than studies of geographic variation. The species accounts include scientific and common names, type locality and description of external and skull characters accompanied by skull photographies of all species. Comparisons with related species in the region were made. The overall geographic distribution of species and particularly the documented distributio...
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Oecologia Australis, 2015
A large geographic differentiation has been reported in Sylvilagus brasiliensis based on external... more A large geographic differentiation has been reported in Sylvilagus brasiliensis based on external characters of a small number of specimens. A new karyotype with 2n = 40 and FNa = 74 from Rio de Janeiro is herein reported. Phylogenetic analyses based on cytochrome b DNA of eight samples from the states of Paraíba, Tocantins, Goiás, Minas Gerais and Rio de Janeiro suggested a strongly structured population. Altogether, molecular and karyotypic data suggested that the diversity of Sylvilagus in eastern Brazil may be larger than the one reported in the literature on the basis of external characters.
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Revista Nordestina De Biologia, 1989
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Biochemical Genetics, 2007
In this study, the geographic patterns of genetic variation of three rodent species belonging to ... more In this study, the geographic patterns of genetic variation of three rodent species belonging to the tribe Oryzomyini were investigated using the mitochondrial cytochrome b and nuclear IRBP genes in biomes that are undergoing degradation processes to a greater or lesser degree. The samples are from 25 collecting localities distributed throughout the Amazon, Cerrado, Atlantic Forest, and Pampa biomes. The results show that the three species have a population and geographic structure, besides being in demographic equilibrium. The phylogenetic analyses performed on Euryoryzomys russatus and Hylaeamys megacephalus showed these specimens grouped in three distinct clades forming geographic gradients (North-South direction in H. megacephalus). Intraspecific genetic divergence was higher in H. megacephalus (4.53%), followed by E. russatus (1.79%), and lowest in Sooretamys angouya (0.88%). The results obtained indicate that, necessarily, the management strategies to preserve genetic diversity should be different for each species, since each of them presented specific population parameters.
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Journal of Heredity, 2009
The sigmodontine South American rodent genus Oligoryzomys was first described as a subgenus of th... more The sigmodontine South American rodent genus Oligoryzomys was first described as a subgenus of the genus Oryzomys to group together species distinguished by morphological measurements. To describe the dispersion patterns of this genus in South America, in this study, a total of 100 sequences were analyzed and compared with sequences of 9 Oligoryzomys species from GenBank. The sequences comprised 90 mitochondrial cytochrome b genes and 10 nuclear interphotoreceptor retinoid-binding protein genes, from 75 individuals of 7 species from 27 localities. Topologies of different phylogenetic trees revealed Oligoryzomys as a monophyletic genus containing 2 main species groups, one designated as the "Amazon-Cerrado" assemblage and the second as the "Pampa-Andean" clade. The north-to-south geographic pattern observed supports the hypothesis that the genus started from the northern Andes, occupied the Amazon and the Cerrado, and later inhabited the more southern regions of South America.
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Journal of Mammalogy, 1989
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mammalia, 2000
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Iheringia. Série Zoologia, 2009
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Journal of Morphological Sciences, 2015
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Zoological Science, 2015
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A inteligência habilita os indivíduos a acompanharem as mudanças ambientais. Nos primatas, esta f... more A inteligência habilita os indivíduos a acompanharem as mudanças ambientais. Nos primatas, esta flexibilidade comportamental atingiu alto desenvolvimento, com avanços nas capacidades cognitivas, que possibilitaram o uso de ferramentas, etc. Existe uma escassez de estudos sobre como aspectos da ecologia ou da vida social estariam associados à capacidade de uso de ferramentas. A hipótese do forrageio extrativo afirma que este deu ímpeto á evolução da inteligência nos primatas. Neste estudo comparam-se duas espécies, Leontopithecus chrysomelas, que utiliza o forrageio extrativo e Callithrix geoffroyi, que utiliza forrageio visual o qual demanda menos capacidade cognitiva. O aparato de teste que consistiu de um suporte de madeira com cinco tubos de vidro contendo mel de abelha e cinco varetas, a ferramenta, para obter o mel do tubo. Quatro comportamentos foram observados com o método animal focal: Inspecionar, Tocar/Cheirar, Manipular palito e Inserir palito. Os indivíduos tiveram freqü...
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Journal of Mammalogy, 2013
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Revista Brasileira de Zoologia, 2002
The marine manatee Trichechus manatus manatus Linnaeus, 1758 is endangered in the Brazilian Atlan... more The marine manatee Trichechus manatus manatus Linnaeus, 1758 is endangered in the Brazilian Atlantic coast due to indiscriminate hunting practiced in the past, and to the low reproductive rate of the species. This work studies its use of space and temporal occurrence in the coastal area of Sagi, Northeastern Brazil. Daily observations from the beach of the animals in the sea were made during daytime from 1990 through 1993. The presence of reefs covered with marine algae is a determinant factor in the occurrence of the manatee. They were sighted feeding on algae that grow over the reefs close to beaches that were of high energy during high tide. The range used by manatees shifted according to tide. They occur in depths of 0.4 to 3.8 m; the distance from the beach varies according to the tide level. They show marked seasonality of occurrence, with higher frequencies in December - January and lowest in June - July. Two possible causes of the seasonal occurrence are discussed. Sagi is important for the conservation of the species in Northeastern Brazil as feeding and reproductive grounds.
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Mammalia, 2000
... Dans les cinq localites ou eile a ete collectee, 1'espece O. russatus presente 2n = 80 .... more ... Dans les cinq localites ou eile a ete collectee, 1'espece O. russatus presente 2n = 80 ... Les especes O. laticeps et O. seuanezi, de la cote Atlantique, montrent respectivement 2n = 52 et 2n ... dis-played lower numbers than the number seen in O. nitidus, O. emmonsae, and O. russa-...
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Papers by Alfredo Ricardo Langguth Bonino