Consulta: creatorFacets:"Verdade,Luciano M."
Registros recuperados: 12
Data/hora: 07/06/2024 02:50:03

Parentage test in broad-snouted caimans (Caiman latirostris, Crocodylidae) using microsatellite DNA
Provedor de dados: 74
Autores: Zucoloto,Rodrigo B.; Verdade,Luciano M.; Villela,Priscilla M.S.; Regitano,Luciana C.A.; Coutinho,Luiz L.
In this study, microsatellite markers, developed for Alligator mississipiensis and Caiman latirostris, were used to assess parentage among individuals from the captive colony of Caiman latirostris at the University of São Paulo, in Piracicaba, São Paulo, Brazil. Many of the females in the colony were full siblings, which made maternal identification difficult due to genotypic similarity. Even so, the most likely mother could be identified unambiguously among offspring in most of the clutches studied. Two non-parental females displayed maternal behavior which would have misled managers in assigning maternity based on behavior alone. This set of variable loci demonstrates the utility of parentage testing in captive propagation programs.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crocodilians; Caiman; Parentage; Microsatellite DNA.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400033

Cranial sexual discrimination in hatchling broad-snouted caiman (Caiman latirostris)
Provedor de dados: 76
Autores: Piña,Carlos; Larriera,Alejandro; Siroski,Pablo; Verdade,Luciano M.
Broad-snouted caiman (Caiman latirostris) hatchlings present a consistent sexual dimorphism in their cranium shape and size. Male hatchlings have smaller crania than females. Using multivariate statistical analyses it is possible to discriminate sex in broad-snouted caiman hatchlings by their cranial shape with a reasonable efficiency. The understanding of sexual dimorphism of crocodilian hatchlings might be possibly improved by experimental approach considering, genetic and phenotypic variables such as incubation temperature and clutch of origin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caiman latirostris; Crocodilians; Hatchlings; Morphometrics; Sexual dimorphism.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000100003

Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
Provedor de dados: 76
Autores: Bonach,Kelly; Malvasio,Adriana; Matushima,Eliana R.; Verdade,Luciano M.
This study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa (Schweigger, 1812). Despite the relatively small sample size we infer that: a) nests of P. expansa in the central Araguaia river have a lower incubation temperature than nests located further south; however, incubation period is shorter, hatching success rate is lower and clutch-size is larger; b) Podocnemis expansa may present a female-male-female (FMF) pattern of temperature sex-determination (TSD); c)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: TSD; Thermosensitive period; Sex determination; Reproductive biology; Turtles.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001

Notes on the hematology of free-living Phrynops geoffroanus (Testudines: Chelidae) in polluted rivers of Southeastern Brazil
Provedor de dados: 103
Autores: Ferronato,Bruno O.; Genoy-Puerto,Alexander; Piña,Carlos I.; Souza,Franco L.; Verdade,Luciano M.; Matushima,Eliana R.
Phrynops geoffroanus (Schweigger, 1812) is the freshwater turtle with the widest geographical distribution in South America. During 2006, physical examination and hematological evaluation were performed on free-ranging turtles from two polluted rivers, the Piracicaba River (n = 51) and its tributary Piracicamirim (n = 42), in southeastern Brazil. Red blood cell and thrombocyte counts, mean corpuscular volume and mean corpuscular hemoglobin levels differed in turtles from the two water courses. Although free-ranging turtles showed ectoparasites and boat propeler lesions, animals apparently had no signs of clinical disease. In spite of our results, further monitoring of the demography and health status of Phrynops geoffroanus in anthropogenically altered...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Hemogram; Lesion; Pollution; Turtle.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400027

Characterization of innate immune activity in Phrynops geoffroanus (Testudines: Chelidae)
Provedor de dados: 103
Autores: Ferronato,Bruno O.; Merchant,Mark E.; Marques,Thiago S.; Verdade,Luciano M.
The innate immune activity of the freshwater turtle Phrynops geoffroanus (Schweigger, 1812) was investigated, using a sheep-red-blood cell hemolysis assay. The time- and concentration-dependent hemolytic activity of the turtle plasma was low compared to that reported for other reptiles. However the plasma of P. geoffroanus exhibited higher activity at elevated temperatures, resulting in temperature-dependent hemolysis. The sensitivity of turtle plasma to temperature could be interpreted as a mechanism by which freshwater turtles use basking behavior to elevate body temperature, thus enhancing the innate immune response. However, we cannot discard the possibility that environmental contaminants could be affecting the turtle's immune response, since the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chelonian; Immunology; Plasma.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400020

Isotopic signatures (δ 13C and δ15N) of muscle, carapace and claw in Phrynops geoffroanus (Testudines: Chelidae)
Provedor de dados: 103
Autores: Marques,Thiago S.; Tassoni-Filho,Maurício; Ferronato,Bruno O.; Guardia,Isabela; Verdade,Luciano M.; Camargo,Plínio B. de.
The isotopic composition ( δ13C and δ 15N) of muscle, carapace and claw was determined from six wild individuals of Phrynops geoffroanus (Schweigger, 1812) in order to verify the variation between those tissues. The mean values of δ13C e δ 15N were, respectively, -19.48 ± 0.81‰ (-20.8 - -18.64‰) and 7.23 ± 0.67‰ (6.49 - 8.3‰) for muscle, -16.52 ± 0.98‰ (-17.88 - -15.43‰) and 7.29 ± 0.54‰ (6.74 - 7.97‰) for carapace and -18.57 ± 0.97‰ (-19.97 - -17.26‰) and 4.36 ± 0.33‰ (3.93 - 4.79‰) for claw. We found a significant difference for the tissues evaluated for both δ13C and δ15N. Muscle and claw were statistically similar and more depleted in 13C than the carapace. Nonetheless, claw was more depleted in 15N than muscle and carapace tissues. These results are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet; Freshwater turtles; Geoffroy's side-necked-turtle; Metabolic processes; Stable isotope.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000300016

The trophic niche of Mesoclemmys vanderhaegei (Testudines: Chelidae): evidence from stable isotopes
Provedor de dados: 103
Autores: Marques,Thiago S.; Brito,Elizângela S.; Lara,Neliton R.F.; Beloto,Luciana M.; Valadão,Rafael M.; Camargo,Plínio B. de; Verdade,Luciano M.
ABSTRACT Ecological niche is the multidimensional space comprising the resources used by an organism. Intraspecific variation in resource exploitation is common in reptile populations to maximize coexistence of individuals. The use of stable isotope analysis is an effective tool when there are variations in resource exploitation, since it can provide quantitative information about food consumption and habitat use. Mesoclemmys vanderhaegei (Bour, 1973) is a medium-sized turtle with a limited distribution in south central Brazil and Paraguay. In spite of that, little is known about its ecology. In this study we used stable isotope analysis to understand the intraspecific trophic niche variation in M. vanderhaegei at Serra das Araras Ecological Station, state...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Anthropic environment; Freshwater turtle; Isotopic niche; Sexual niche.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100501

Foraging behavior of Brazilian cormorant, Nannopterum brasilianus (Suliformes: Phalacrocoracidae)
Provedor de dados: 103
Autores: Gheler-Costa,Carla; Comin,Fábio Henrique; Gilli,Letícia C.; Verdade,Luciano M.
ABSTRACT Although the concept of optimal foraging has been extensively discussed, foraging efficiency is difficult to assess in vertebrates. In this study, we determined the foraging efficiency of the Brazilian cormorant, Nannopterum brasilianus Gmelin, 1789, by the direct, ad libitum observation of a group of four to thirteen individuals in an artificial pond at the University of São Paulo, Piracicaba, state of São Paulo, southeastern Brazil. Although this study was carried out in a highly anthropic environment, we can still conclude that the Brazilian cormorant is a relatively efficient browser and short-term diver. In anthropic environments, foraging success depends on the amount of time these birds spend diving, and stealing food is less common....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food biology; Food stealing; Foraging success; Social behavior; Wading birds.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100328

Mamíferos não-voadores do campus "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, Brasil
Provedor de dados: 104
Autores: Gheler-Costa,Carla; Verdade,Luciano M.; Almeida,Álvaro F. de.
The remaining portion of the Atlantic Forest within the State of Sao Paulo is highly fragmented and most of the remainders are wrapped up in an essentially agricultural mosaic. This study aims at the local surveying of non-volant mammals, including their distribution and relative abundance within the human-altered environments of campus "Luiz de Queiroz", University of Sao Paulo, Piracicaba, São Paulo State, Brazil, an urbanized area bordered by two highways and the Piracicaba River. The landscape of the study area is characterized by a mosaic of small forest fragments surrounded by pastures, agriculture, and planted forests. Small mammals were captured from February to October, 2001, with an effort of 7056 day-traps, sampling the most representative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mammals; Forest; Agricultural mosaic; Landscapes.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000600021

How much is a puma worth?: economic compensation as an alternative for the conflict between wildlife conservation and livestock production in Brazil
Provedor de dados: 49
Autores: Verdade,Luciano M.; Campos,Cláudia B.
In this article a case of sheep predation by pumas is presented and used as an example for evaluating the damage and the cost of economic compensation mitigating action for the conflicts between wildlife conservation and livestock production in Brazil. The relative advantages of this kind of action are discussed, considering the Brazilian scenario.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Conservation; Wildlife management; Damage control; Puma; Carnivore; Extension.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032004000200014

Trophic categories in a mammal assemblage: diversity in an agricultural landscape
Provedor de dados: 49
Autores: Dotta,Graziela; Verdade,Luciano M.
Mammals play an important role in the maintenance and regeneration of tropical forests since they have essential ecological functions and can be considered key-species in structuring biological communities. In landscapes with elevated anthropogenic pressure and high degree of fragmentation, species display distinct behavioral responses, generally related to dietary habits. The landscape of Passa-Cinco river basin, in the central-eastern region of São Paulo State, shows a high degree of anthropogenic disturbance, with sugar cane plantations, eucalyptus forests, native semideciduous forest remnants and pastures as the key habitat types in the region. We surveyed medium to large mammals in those habitats and determined species richness and relative abundance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Species richness; Relative abundance; Feeding guilds; Agroecosystems.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000200031

A exploração da fauna silvestre no Brasil: Jacarés, sistemas e recursos humanos
Provedor de dados: 49
Autores: Verdade,Luciano M.
A conservação da vida silvestre normalmente necessita de estudos caso a caso porque a população - e não a espécie - deve ser na maioria das vezes a unidade do manejo. No Brasil, a falta de uma categoria profissional específica, como a dos wildlife biologists norte-americanos, dificulta a implantação de programas de conservação e manejo de vida silvestre. O preconceito contra o uso da fauna como recurso natural renovável, o abuso da criação em cativeiro e a noção de que o país não é capaz de implantar com sucesso um programa de fiscalização eficaz impedem a implantação de sistemas biologicamente sustentáveis, economicamente viáveis e socialmente justificáveis de uso da fauna silvestre. Isto só poderá mudar através da formação adequada de recursos humanos,...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Manejo de fauna; Uso sustentável; Jacaré; Sistemas de manejo; Sociedade.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032004000200002