|
|
|
|
|
| Bastos,Heitor B.; Gonçalves,Evonnildo C.; Ferrari,Stephen F.; Silva,Artur; Schneider,Maria Paula C.. |
| We genotyped 15 microsatellite loci in order to evaluate the effects of habitat fragmentation, caused by flooding of the Tucuruí reservoir, on the genetic structure of Alouatta belzebul in eastern Amazonia. The analysis included two populations sampled in 1984, representing both margins of the Tocantins river, and three populations sampled 18 years later. Minimal differences in the diversity levels between present-day (Ho = 0.62-0.69 and A R = 6.07-7.21) and pre-flooding (Ho = 0.60-0.62 and A R = 6.27-6.77) populations indicated there was no significant loss of genetic variability, possibly because of successful management strategies applied during the flooding. The changes observed were limited to shifts in the composition of alleles, which presumably... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alouatta belzebul; Amazonia; Conservation; Genetic structure; Habitat fragmentation. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400027 |
| |
|
|
| Lima,Jamily L.R. de; Soares,Fabricio A.; Remedios,Ana C.S.; Thom,Gregory; Wirthlin,Morgan; Aleixo,Alexandre; Schneider,Maria Paula C.; Mello,Claudio V.; Schneider,Patricia N.. |
| The memorization and production of song in songbirds share important parallels with the process of speech acquisition in humans. In songbirds, these processes are dependent on a group of specialized telencephalic nuclei known as the song system: HVC (used as a proper name), RA (robust nucleus of arcopallium), LMAN (lateral magnocellular nucleus of the nidopallium) and striatal Area X. A recent study suggested that the arcopallium of the Sayornis phoebe, a non vocal learner suboscine species, contains a nucleus with some properties similar to those of songbird RA, suggesting that the song system may have been present in the last common ancestor of these groups. Here we report morphological and gene expression evidence that a region with some properties... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vocal learning; RGS4; Song nuclei; In situ hybridization. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300249 |
| |
|
|
|
