Consulta: subjectFacets:"Mammal"
Registros recuperados: 12
Data/hora: 11/06/2024 06:29:23

Molecular identification of Mazama species (Cervidae: Artiodactyla) from natural history collections
Provedor de dados: 74
Autores: Mantellatto,Aline Meira Bonfim; González,Susana; Duarte,José Maurício Barbanti.
Abstract Natural history museum collections constitute an invaluable patrimony of biological diversity for analysing the taxa distribution and evolution. However, it is very common to discover taxonomic misidentification in museum collections based on incorrect data. The aim of this research was to identify brocket deer species (Mazama genus) using molecular markers. We collected 199 samples, performed DNA extraction and species identification using a specific mitochondrial marker based on a fragment of cytochrome b (Cytb) for Neotropical deer. We achieved the amplification and sequencing of 77 specimens and verified that 26% of the skulls were wrongly identified. Moreover, in the museum collections 57% of the specimens were only identified as Mazama sp,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytochrome b; Deer; DNA; Mammal; Morphological taxonomy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400201

Maternal oxidative stress and reproduction: testing the constraint, cost and shielding hypotheses in a wild mammal
Provedor de dados: 5
Autores: Viblanc, Vincent A.; Schull, Quentin; Roth, Jeffrey D.; Rabdeau, Juliette; Saraux, Claire; Uhlrich, Pierre; Criscuolo, François; Dobson, F. Stephen.
1.Oxidative stress has been proposed as a central causal mechanism underlying the life history trade-off between current and future reproduction and survival in wild animals. 2.Whereas mixed evidence suggests that maternal oxidative stress may act both as a constraint and a cost to reproduction, some studies have reported a lack of association between reproduction and maternal oxidative stress. 3.The oxidative shielding hypothesis offers an alternative explanation, suggesting that mothers may pre-emptively mitigate the oxidative costs of reproduction by increasing antioxidant defences prior to reproduction. 4.We tested the oxidative constraint, cost, and shielding hypotheses using a longitudinal field study of oxidative stress levels in a species that...
Tipo: Text
Palavras-chave: Antioxidant; Body condition; Cost of reproduction; Life history; Mammal; Mitochondria; Trade-off.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52679/53542.pdf

Spatial imprints of plate tectonics on extant richness of terrestrial vertebrates
Provedor de dados: 5
Autores: Descombes, Patrice; Leprieur, Fabien; Albouy, Camille; Heine, Christian; Pellissier, Loic.
Aim  In interaction with past climate changes, it is likely that plate tectonics contributed to the shaping of current global species diversity, but so far this has not been statistically quantified at the global level. Here, we tested whether plate tectonics since the breakup of Gondwana left an imprint on current patterns of species richness of amphibians, birds and mammals. Location  Global. Methods  We reconstructed the absolute positions of continental plates since the Early Cretaceous and used this information to derive variables of latitudinal shifts and potential exchanges among landmasses that could have modulated species richness. Using a multi-model inference approach combining both contemporary and historical variables, we quantified the...
Tipo: Text
Palavras-chave: Amphibian; Bird; Continental drift; Diversity; Indo-Pacific; Madagascar; Mammal; Plate tectonics; Southeast Asia; Wallace line.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00373/48413/48711.pdf

De l'interaction entre la peche et les mammiferes marins
Provedor de dados: 5
Autores: Morizur, Yvon; Antoine, Loic.
The exploitation of the living marine resources should take into account the effects on marine ecosystems. It consequently includes direct and indirect impacts of fishing activities on marine communities of non-market value for the fishing industry. Protecting the marine species victims of by-catch such as sea mammals is essential as it could be a serious threat for endangered species -See COM (1999) 363 final. The entire group of cetaceans are among the protected species listed by CITES against over-exploitation through international trade. Similarly, several international agreements on cetaceans conservation have been signed, including the Agreement on the Conservation of Small Cetaceans of the Baltic and North Seas (ASCOBANS), the ACCOBAMS agreement for...
Tipo: Text
Palavras-chave: Catche; Cetacean; Marine ecosystem; Fishing; Mammal; Marine living resources.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-1552.pdf

Sperm Morphology and Natural Biomolecules from Marine Snail Telescopium telescopium: a Phylogenetic Perspective
Provedor de dados: 77
Autores: Datta,Uttam; Hembram,Manik Lal; Roy,Subhasis; Mukherjee,Prasenjit.
Biochemical analysis of the cytosol fraction isolated from the ovotestis/spermatheca glands of marine mollusc Telescopium telescopium and it's sperm microtubular structure revealed that relatively similar biomolecules like different enzymes, hormones, minerals and structures of the sperm are also exist in humans. Moreover, antiserum of the cytosol fraction was found to cross-react with the human sperm antigen indicated presence of a common sperm surface antigenicity between these two diversified species. These findings might support and / or hypothesize about the origin and diversification of the vertebrate molecules from its ancestral form (s) from the invertebrates, and basic physiological functions of these ancestral biomolecules including some of the...
Tipo: Journal article
Palavras-chave: Phylogeny; Telescopium telescopium; Biomolecules; Spermatozoa; Mammal.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000100025

On the diagnostic characters, ecogeographic distribution, and phylogenetic relationships of Gracilinanus emiliae (Didelphimorphia: Didelphidae: Thylamyini)
Provedor de dados: 81
Autores: Voss,Robert S.; Fleck,David W.; Jansa,Sharon A.
Gracilinanus emiliae is a species of gracile mouse opossum that is currently known from fewer than a dozen specimens. The material we examined exhibits a distinctive suite of external and craniodental characters that are unlike those of any other congeneric species. We review all published records for G. emiliae, several of which are based on misidentifications or lost material, and we report a new specimen from northeastern Peru, the first to be recorded from that country, and the first to be unequivocally associated with primary lowland rain forest. The available distributional data suggest that G. emiliae (or a complex of cryptic taxa with the same morphological characters) is very widely distributed in Amazonia and perhaps also in Venezuelan coastal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Mammal; Marsupial; Neotropical; Rainforest.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000200015

北海道東部における中・小型哺乳類, 爬虫類および両生類の交通事故
Provedor de dados: 19
Autores: Yanagawa, Hisashi; Akisawa, Masae.
Road kills of medium- and small-sized mammals, reptiles and amphibians were surveyed in eastern Hokkaido, northern Japan. Four hundreds and fifty-five carcasses of medium- and small-sized mammals, 17 carcasses of reptiles and 1051 carcasses of amphibians were collected from April 1996 to March 1998. In mammals, the species with the highest number of casualties due to traffic accidents was the Big-clawed Shrew with a total of 152 killed, followed by Red Squirrel (94) and Red Fox (85). Road kills of reptiles were low, with only 17 mortalities of four species. In amphibians, a great majority of the mortalities were Ezo Brown Frogs with 1,044 casualties.
Palavras-chave: Road kill; Mammal; Reptile; Amphibian; Japan; 交通事故; 哺乳類; 爬虫類; 両生類; 日本.
Ano: 2004
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/89

Variation in cytochrome-b haplotypes suggests a new species of Zygodontomys (Rodentia: Cricetidae) endemic to Isla Coiba, Panama
Provedor de dados: 103
Autores: González,Publio; Sawyer,Yadéeh E.; Avila,Mario; Armién,Aníbal G.; Armién,Blas; Cook,Joseph A.
The identity of two insular populations of rodents of the nominal species, Zygodontomys brevicauda (Allen &amp;amp; Chapman, 1893), from the Veragua Archipelago was examined. The mitochondrial cytochrome-b gene was sequenced from specimens collected on Isla Coiba (n = 10), Isla Cébaco (n = 3) and on the nearby Peninsula Azuero (n = 3) in Panama and compared with sequences of Z. brevicauda and a number of other related species from GenBank. For Panama, phylogenetic analyses identified two clades within Zygodontomys Allen, 1897; one representing Isla Coiba and another clade composed of rats from Isla Cébaco and from the mainland on the Peninsula Azuero, as well as a GenBank sequence of Z. brevicauda from Venezuela. We suggest that the population from Isla...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cébaco; Island; Mammal; Panamá.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000400014

First report of thelazia californiensis price (Nematoda, Thelazioidea) in South America from the eyes of a Brazilian deer, mazama gouazoupira (Fischer) (Mammalia, Cervidae)
Provedor de dados: 104
Autores: Pinto,Roberto Magalhães; Vicente,Joaquim Júlio; Rodrigues,Henrique de Oliveira.
Data on Thelazia californiensis Price, 1930 are presented. The importance of this eye nematode is also related to a few human cases due to this parasite in the USA. This is the first report of T. californiensis occurring in a South American host, Mazama gouazoupira (Fischer, 1814), which is also a new record for the species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nematode; Thelazia californiensis; Mammal; Deer; Brazil.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400030

Quantification of argyrophillic, argentaffin and insulin immunoreactive cells in the small intestine in the opossum Didelphis aurita (Wied-Neuwied, 1826) - doi: 10.4025/actascibiolsci.v33i4.8644
Provedor de dados: 3
Autores: Ribeiro, Gláucia Marques Freitas; UFV; Fonseca, Cláudio César; Universidade Federal de Viçosa; Rodrigues, Sirlene Souza; Universidade Federal de Viçosa; Matta, Sérgio Luis Pinto da; Universidade Federal de Viçosa; Neves, Clovis Andrade; Universidade Federal de Viçosa.
The objective of this study was to quantify argyrophillic, argentaffin and insulin immunoreactive endocrine cells in the different segments of the small intestine of Didelphis aurita and measure probable differences in the number of these cells between adult and post-pubertal animals. Biological material consisted of ten male and female opossums specimen, divided in two groups according to weigh. The utilized staining techniques were Grimelius, modified Masson-Fontana and direct immunoperoxidase. Results indicated a predominance of argyrophillic cells in the small intestine of opossums from class 1 and 2, with an average of 52.58 and 56.15 cells mm-2, respectively; of which, the average number of total endocrine cells, argyrophillic and argentaffin cells...
Palavras-chave: 2.00.00.00-6; 2.06.01.00-0 digestive tract; Endocrine cells; Immunoreactive cells; Mammal; Marsupial Citologia e Biologia Celular digestive tract; Endocrine cells; Immunoreactive cells; Mammal; Marsupial.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8644

Mercury content in the fur of jaguars (Panthera onca) from two areas under different levels of gold mining impact in the Brazilian Pantanal
Provedor de dados: 42
Autores: MAY JÚNIOR,JOARES A.; QUIGLEY,HOWARD; HOOGESTEIJN,RAFAEL; TORTATO,FERNANDO R.; DEVLIN,ALLISON; CARVALHO JÚNIOR,RUI M. DE; MORATO,RONALDO G.; SARTORELLO,LEONARDO R.; RAMPIM,LILIAN E.; HABERFELD,MARIO; PAULA,ROGÉRIO C. DE; ZOCCHE,JAIRO JOSÉ.
ABSTRACT The Pantanal is the largest inland wetland in the world and is under increasing anthropogenic threats, including long-term regionally intensive gold mining practices. Gold mining activities are known to cause the release of harmful pollutants such as mercury (Hg) to the surrounding environment. Jaguars (Panthera onca (Linnaeus, 1758)) are apex predators, and therefore show great potential to accumulate Hg by biomagnification. We hypothesize that total Hg content in the fur of jaguars from two sites within the Brazilian Pantanal would be significantly different as a function of distance from active gold mining operations. The Hg content was determined by fluorescence spectrometry. The mean ± SD Hg content in jaguars from the study site influenced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomagnification; Heavy metals; Mammal; Wetland.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502129

Fragment edge and isolation affect the food web: effects on the strength of interactions among trophic guilds
Provedor de dados: 49
Autores: Melo,Michele Molina; Silva,Cristina Magalhães; Barbosa,Carina Santos; Morais,Maristela Calvente; D'Anunciação,Paula Eveline Ribeiro; Silva,Vinícius Xavier da; Hasui,Érica.
Abstract Habitat loss and fragmentation are processes that may affect communities by changing species interactions. These changes occur because the strength of linkages between species is not exclusively dependent on predator and prey traits. Species interaction changes also depend on the spatial context in which they take place. We used structural equation modelling to evaluate effects of these processes at patch-scale on top-down and bottom-up controls in food webs in Atlantic Forest. The model was composed of multiple species, and trophic guilds responded differently to fragment edge and isolation. Changes in bottom-up and top-down controls were mainly related to intermediate predator interactions. Efforts to restore connectivity among fragments should...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Bird; Brazil; Connectivity; Landscape; Mammal; Patch-scale; Patch size; Predator-prey interaction; Trophic cascade.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200209