Amazon basin

Microsatellite markers for Amazon pellona Pellona castelnaeana (Clupeiformes: Pristigasteridae)

A. M. Ximenes, Hernández-Ruz, E. J., Machado, V. N., Rodrigues, L. R. R., Ritter, G. C. S., and Farias, I. P., Microsatellite markers for Amazon pellona Pellona castelnaeana (Clupeiformes: Pristigasteridae), vol. 14. pp. 5123-5126, 2015.

The Amazon pellona is one of the few species of Pristigasteridae with recognized commercial value in the Amazon. We isolated 24 and characterized 8 microsatellite loci for this species. The number of alleles ranges from 2-8 per locus. Observed heterozygosities ranged from 0.052-0.823, while expected heterozygosities from 0.052-0.836. These 8 microsatellites are potentially valuable tools for characterizing the levels and distribution of genetic diversity, population structure, and gene flow.

Population genetics analysis of Podocnemis sextuberculata (Testudines, Podocnemidae): lack of population structure in the central Amazon Basin

T. J. Silva, Monjeló, L. A. S., Viana, M. N. S., Pezzuti, J. C., Andrade, P. C. M., Vogt, R. C., and Farias, I. P., Population genetics analysis of Podocnemis sextuberculata (Testudines, Podocnemidae): lack of population structure in the central Amazon Basin, vol. 10. pp. 1393-1402, 2011.

The chelonians are, in general, important for the economy of the traditional populations of the Amazon region, especially as a source of animal protein. Furthermore, sub-products, such as eggs and fat, are utilized in the manufacture of cosmetics, and the plastron and carapace are used in the manufacture of adornments. The freshwater turtle species Podocnemis sextuberculata, locally known as “iaçá” or “pitiú”, is widely distributed in the Amazon Basin in Brazil and also in Colombia and Peru.

Comparison of bacterial communities in the Solimões and Negro River tributaries of the Amazon River based on small subunit rRNA gene sequences

J. C. C. Peixoto, Leomil, L., Souza, J. V., Peixoto, F. B. S., and Astolfi-Filho, S., Comparison of bacterial communities in the Solimões and Negro River tributaries of the Amazon River based on small subunit rRNA gene sequences, vol. 10, pp. 3783-3793, 2011.

The microbiota of the Amazon River basin has been little studied. We compared the structure of bacterial communities of the Solimões and Negro Rivers, the main Amazon River tributaries, based on analysis of 16S rRNA gene sequences. Water was sampled with a 3-L Van Dorn collection bottle; samples were collected at nine different points/depths totaling 27 L of water from each river. Total DNA was extracted from biomass retained by a 0.22-μm filter after sequential filtration of the water through 0.8- and 0.22-μm filters.

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