Results 11 to 20 of about 909 (112)

DNA barcoding uncovers two putative new species in Trachelyopterus (Siluriformes: Auchenipteridae). [PDF]

J Fish Biol
Abstract Trachelyopterus is a cryptic genus within the Neotropical catfish family Auchenipteridae with a complex history of taxonomic revisions. Despite the notable morphological and genetic similarities among its species, some studies suggest that the genus harbours greater diversity than is currently recognized, including additional species yet to be
Cerqueira FJ, da Silva M, Haerter CAG, Mariotto S, Centofante L, Feldberg E, Filho OM, Margarido VP, Blanco DR, Lui RL.   +9 more
europepmc   +2 more sources

The Chromosomal Organization of Isleria hauxwelli and Its Meaning for the Karyotypic Evolution in Thamnophilidae (Passeriformes). [PDF]

Anim Genet
ABSTRACT The order Passeriformes, the most speciose avian order, includes over 6000 species (~60% of all birds). The Amazon Basin alone hosts > 900 bird species, with Passeriformes representing > 500 of them. The family Thamnophilidae comprises ~200 insectivorous species, accounting for 15% of Neotropical passerine richness.
Ferreira PVM, Ribas TFA, Monteiro AN, de Silva Tembra LG, de Andrade Machado M, O'Brien PCM, Ferguson-Smith MA, Yang F, Nagamachi CY, Pieczarka JC.   +9 more
europepmc   +2 more sources

Risk of local extinction and genetic diversity of Melipona quadrifasciata (Apidae: Meliponini) in a possible Northeastern limit of its distribution in Brazil

Sociobiology, 2016
Rapid loss of genetic diversity among eusocial bees, and extinction of their local population has become a major world concern. Populations of M. quadrifasciata have increasingly declined due to predatory extractivism and destruction of their habitat ...
Edilson D Araújo, Rosane Gomes Oliveira, Higor Cesar Meneses Calazans, Carina Caroline Silva França, Valdson SANTOS, Sona Arun Jain, Marcus Vinícius Aragão Batista, Lorena Andrade Nunes, Genésio Tamara Ribeiro   +8 more
doaj   +1 more source

Cryptic diversity and recent diversification in the Pyrrhulina australis species complex (Characiformes, Lebiasinidae) revealed by mitochondrial DNA. [PDF]

J Fish Biol
Abstract Pyrrhulina australis Eigenmann & Kennedy, 1903, is widely distributed across the main hydrographic basins of South America. The taxonomic integrity of this species is nevertheless challenged by the lack of clear diagnostic characters, its marked geographic variation and the morphological overlap with its congeners. In this context, the present
Souza TB, Ferreira DC, Silva HPD, Machado CB, Oliveira C, Netto-Ferreira AL, Venere PC.   +6 more
europepmc   +2 more sources

VARIABILIDADE GENÉTICA EM POPULAÇÕES DE IPÊ-ROXO - Tabebuia heptaphylla (Vell.) Tol. - PARA CONSERVAÇÃO "EX SITU"

Revista do Instituto Florestal, 1996
Populações de Tabebuia heptaphylla - ipê-roxo - foram avaliadas através de -testes de progênies para detectar a existência de variabilidade genética e a suficiência dessa variabilidade para conservação "cx situ" dos recursos genéticos da espécie.
Lígia de Castro Ettori, Ana Cristina Machado De Franco Siqueira, Aida Sanae Sato, Ostenildo Ribeiro Campos   +3 more
doaj   +1 more source

A Perspective of Molecular Cytogenomics, Toxicology, and Epigenetics for the Increase of Heterochromatic Regions and Retrotransposable Elements in Tambaqui (Colossoma macropomum) Exposed to the Parasiticide Trichlorfon

Animals, 2022
Rex retroelements are the best-known transposable elements class and are broadly distributed through fish and also individual genomes, playing an important role in their evolutionary dynamics.
Maria dos Santos Costa, Hallana Cristina Menezes da Silva, Simone Cardoso Soares, Ramon Marin Favarato, Eliana Feldberg, Ana Lúcia Silva Gomes, Roberto Ferreira Artoni, Daniele Aparecida Matoso   +7 more
doaj   +1 more source

Caracterização genética de populações naturais de goiabeira serrana (Acca sellowiana) com marcadores microssatélites heterólogos

Biotemas, 2011
A goiabeira serra Acca sellowiana é uma espécie nativa do sul do Brasil e nordestete do Uruguai e devido ao sabor único de seus frutos apresenta-se como alternativa de renda para pequenos agricultores. O conhecimento da diversidade genética se constitui
Karine Louise dos Santos, Jean Pierre Henri Joseph Ducroquet, Rubens Onofre Nodari   +2 more
doaj   +1 more source

Low Genetic Diversity of the Endangered Franciscana (Pontoporia blainvillei) in Its Northernmost, Isolated Population (FMAIa, Espírito Santo, Brazil)

Frontiers in Marine Science, 2020
The franciscana, Pontoporia blainvillei, is the most endangered small cetacean in the Southwestern Atlantic Ocean, occurring from Itaúnas, Espírito Santo, Brazil to Chubut province, Argentina.
Vanessa K. M. de Oliveira, Drienne M. Faria, Haydée A. Cunha, Teresa E. C. dos Santos, Adriana C. Colosio, Lupércio A. Barbosa, Mylla Carla C. Freire, Ana Paula C. Farro   +7 more
doaj   +1 more source

Divergência morfológica entre matrizes de Euterpe edulis Mart.

Floresta e Ambiente, 2023
Resumo Com objetivos de estimar parâmetros populacionais, determinar a divergência entre matrizes e subsidiar a otimização da coleta de germoplasma em uma população fragmentada de Euterpe edulis Mart, com vista à conservação genética da espécie ...
Samuel Pigozzo Silva, Jorge Mitiyo Maêda, Mauricio Ballesteiro Pereira, Antonio Petali Júnior   +3 more
doaj  

The Habitat Affects the Ecological Interactions between Azteca Forel (Hymenoptera: Formicidae) and Cecropia Loefl. (Urticaceae Juss.)

Sociobiology, 2018
In order to understand the effects of human impacts on structure and functioning of tropical forests, we should consider studies on animal-plant interactions such as antplant mutualistic interactions.We investigated the mutualistic interactions between ...
Marcos Augusto Ferraz Carneiro, André Luiz Gaglioti, Karine Santana Carvalho, Ivan Cardoso Nascimento, Juliana Zina   +4 more
doaj   +1 more source