Both cetaceans in the Brazilian Amazon show sustained, profound population declines over two decades. [PDF]
PLoS ONE, 2018 Obligate river dolphins occur only in the rivers of Asia and South America, where they are increasingly subject to damaging pressures such as habitat degradation, food competition and entanglement in fishing gear as human populations expand.
Vera M F da Silva +3 more
doaj +17 more sources
Placentation in dolphins from the Amazon River Basin: the Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilis [PDF]
Reproductive Biology and Endocrinology, 2007 A recent reassessment of the phylogenetic affinities of cetaceans makes it timely to compare their placentation with that of the artiodactyls. We studied the placentae of two sympatric species of dolphin from the Amazon River Basin, representing two ...
Bonatelli Marina +6 more
doaj +8 more sources
Towards automated long-term acoustic monitoring of endangered river dolphins: a case study in the Brazilian Amazon floodplains [PDF]
Scientific Reports, 2023 Using passive acoustic monitoring (PAM) and convolutional neural networks (CNN), we monitored the movements of the two endangered Amazon River dolphin species, the boto (Inia geoffrensis) and the tucuxi (Sotalia fluviatilis) from main rivers to ...
Florence Erbs +6 more
doaj +2 more sources
Sightings of Pontoporia blainvillei (Gervais & D' Orbigny, 1844) and Sotalia fluviatilis (Gervais, 1853) (Cetacea) in South-eastern Brazil [PDF]
Brazilian Archives of Biology and Technology, 2001 Pontoporia blainvillei (Gervais & D' Orbigny, 1844) and Sotalia fluviatilis (Gervais, 1853) have typically coastal habits and are sympatric in South-eastern Brazil.
Ana Paula M. Di Beneditto +2 more
doaj +4 more sources
Human-wildlife conflicts with crocodilians, cetaceans and otters in the tropics and subtropics [PDF]
PeerJ, 2022 Conservation of freshwater biodiversity and management of human-wildlife conflicts are major conservation challenges globally. Human-wildlife conflict occurs due to attacks on people, depredation of fisheries, damage to fishing equipment and entanglement
Patrick Cook +3 more
doaj +3 more sources
Osteological alterations in the tucuxi Sotalia fluviatilis (cetacea, delphinidae) [PDF]
Iheringia: Série Zoologia, 2013 We present a description of osteological alterations observed in the tucuxi, Sotalia fluviatilis (Gervais, 1853) from a sample of 43 specimens. Fractures were the most frequent alterations in the sample (16%), occurring in various regions of the skeleton
Daniela de C. Fettuccia +2 more
doaj +3 more sources
Molecular sexing of tucuxi dolphins (Sotalia guianensis and Sotalia fluviatilis) using samples from biopsy darting and decomposed carcasses [PDF]
Genetics and Molecular Biology, 2007 We tested the zinc-finger sex chromosome-linked genes Zfx/Zfy and the sex-determining region Y (Sry) genes for gender determination of biopsy samples from marine and riverine tucuxi dolphins (Sotalia guianensis and S. fluviatilis).
Haydée A. Cunha, Antonio M. Solé-Cava
doaj +4 more sources
Initial Evidence for Adaptive Selection on the NADH Subunit Two of Freshwater Dolphins by Analyses of Mitochondrial Genomes. [PDF]
PLoS ONE, 2015 A small number of cetaceans have adapted to an entirely freshwater environment, having colonized rivers in Asia and South America from an ancestral origin in the marine environment. This includes the 'river dolphins', early divergence from the odontocete
Susana Caballero +4 more
doaj +2 more sources
On the brink of isolation: Population estimates of the Araguaian river dolphin in a human-impacted region in Brazil. [PDF]
PLoS ONE, 2020 Populations of freshwater dolphins are declining in response to increased human pressure, including habitat degradation, overfishing, bycatch, poaching and obstruction of free-flowing river corridors by dams. At least three river dolphin species occur in
Mariana Paschoalini +8 more
doaj +2 more sources
Lesões ósseas em Sotalia fluviatilis (Cetacea) como conseqüência de enredamento: Relato de caso [PDF]
Brazilian Journal of Veterinary Research and Animal Science, 2001 The objective of the present study was to describe a set of lesions caused by entanglement of Sotalia fluviatilis accidentally captured by gillnet on July, 23, 1995, in the Northern Rio de Janeiro State (21º37'S-041º01'W), Southeastern of Brazil.
Di Beneditto, Ana Paula Madeira +2 more
core +7 more sources