--- _id: '3770' abstract: - lang: eng text: 'The pink dolphin (Inia geoffrensis) is widely distributed along the Amazon and Orinoco basins, covering an area of approximately 7 million km2. Previous morphological and genetic studies have proposed the existence of at least two evolutionary significant units: one distributed across the Orinoco and Amazon basins and another confined to the Bolivian Amazon. The presence of barriers in the riverine environment has been suggested to play a significant role in shaping present-day patterns of ecological and genetic structure for this species. In the present study, we examined the phylogeographic structure, lineage divergence time and historical demography using mitochondrial (mt)DNA sequences in different pink dolphin populations distributed in large and small spatial scales, including two neighbouring Brazilian Amazon populations. mtDNA control region (CR) analysis revealed that the Brazilian haplotypes occupy an intermediate position compared to three previously studied geographic locations: the Colombian Amazon, the Colombian Orinoco, and the Bolivian Amazon. On a local scale, we have identified a pattern of maternal isolation between two neighbouring populations from Brazil. Six mtDNA CR haplotypes were identified in Brazil with no sharing between the two populations, as well as specific cytochrome b (cyt b) haplotypes identified in each locality. In addition, we analyzed autosomal microsatellites to investigate male-mediated gene flow and demographic changes within the study area in Brazil. Data analysis of 14 microsatellite loci failed to detect significant population subdivision, suggesting that male-mediated gene flow may maintain homogeneity between these two locations. Moreover, both mtDNA and microsatellite data indicate a major demographic collapse within Brazil in the late Pleistocene. Bayesian skyline plots (BSP) of mtDNA data revealed a stable population for Colombian and Brazilian Amazon lineages through time, whereas a population decline was demonstrated in the Colombian Orinoco lineage. Moreover, BSP and Tajima''s D and Fu''s Fs tests revealed a recent population expansion exclusively in the Bolivian sample. Finally, we estimated that the diversification of the Inia sp. lineage began in the Late Pliocene (approximately 3.1 Mya) and continued throughout the Pleistocene.' article_processing_charge: No author: - first_name: Claudia full_name: Hollatz, Claudia last_name: Hollatz - first_name: Sibelle full_name: Vilaça, Sibelle last_name: Vilaça - first_name: Rodrigo A full_name: Fernandes Redondo, Rodrigo A id: 409D5C96-F248-11E8-B48F-1D18A9856A87 last_name: Fernandes Redondo orcid: 0000-0002-5837-2793 - first_name: Míriam full_name: Marmontel, Míriam last_name: Marmontel - first_name: Cyndi full_name: Baker, Cyndi last_name: Baker - first_name: Fabrício full_name: Santos, Fabrício last_name: Santos citation: ama: Hollatz C, Vilaça S, Fernandes Redondo RA, Marmontel M, Baker C, Santos F. The Amazon River system as an ecological barrier driving genetic differentiation of the pink dolphin (Inia geoffrensis). Biological Journal of the Linnean Society. 2011;102(4):812-827. doi:10.1111/j.1095-8312.2011.01616.x apa: Hollatz, C., Vilaça, S., Fernandes Redondo, R. A., Marmontel, M., Baker, C., & Santos, F. (2011). The Amazon River system as an ecological barrier driving genetic differentiation of the pink dolphin (Inia geoffrensis). Biological Journal of the Linnean Society. Wiley. https://doi.org/10.1111/j.1095-8312.2011.01616.x chicago: Hollatz, Claudia, Sibelle Vilaça, Rodrigo A Fernandes Redondo, Míriam Marmontel, Cyndi Baker, and Fabrício Santos. “The Amazon River System as an Ecological Barrier Driving Genetic Differentiation of the Pink Dolphin (Inia Geoffrensis).” Biological Journal of the Linnean Society. Wiley, 2011. https://doi.org/10.1111/j.1095-8312.2011.01616.x. ieee: C. Hollatz, S. Vilaça, R. A. Fernandes Redondo, M. Marmontel, C. Baker, and F. Santos, “The Amazon River system as an ecological barrier driving genetic differentiation of the pink dolphin (Inia geoffrensis),” Biological Journal of the Linnean Society, vol. 102, no. 4. Wiley, pp. 812–827, 2011. ista: Hollatz C, Vilaça S, Fernandes Redondo RA, Marmontel M, Baker C, Santos F. 2011. The Amazon River system as an ecological barrier driving genetic differentiation of the pink dolphin (Inia geoffrensis). Biological Journal of the Linnean Society. 102(4), 812–827. mla: Hollatz, Claudia, et al. “The Amazon River System as an Ecological Barrier Driving Genetic Differentiation of the Pink Dolphin (Inia Geoffrensis).” Biological Journal of the Linnean Society, vol. 102, no. 4, Wiley, 2011, pp. 812–27, doi:10.1111/j.1095-8312.2011.01616.x. short: C. Hollatz, S. Vilaça, R.A. Fernandes Redondo, M. Marmontel, C. Baker, F. Santos, Biological Journal of the Linnean Society 102 (2011) 812–827. date_created: 2018-12-11T12:05:04Z date_published: 2011-04-01T00:00:00Z date_updated: 2021-01-12T07:52:05Z day: '01' doi: 10.1111/j.1095-8312.2011.01616.x extern: '1' intvolume: ' 102' issue: '4' language: - iso: eng month: '04' oa_version: None page: 812 - 827 publication: Biological Journal of the Linnean Society publication_status: published publisher: Wiley publist_id: '2457' status: public title: The Amazon River system as an ecological barrier driving genetic differentiation of the pink dolphin (Inia geoffrensis) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 102 year: '2011' ...