Results 21 to 30 of about 8,460 (181)
Prey-Transfer in the Marine Tucuxi Dolphin, Sotalia fluviatilis, on the Brazilian Coast
Marine Biodiversity Records, 2008 The first record of prey-transfer behaviour between adult and calf animals in Sotalia fluviatilis is recorded. Five clear episodes of prey-transfer from adult animals to calves were observed, occurring in north-eastern Brazil at Pipa's Beach. These results suggest that food-sharing is a naturally occurring behaviour in the marine tucuxi dolphin, and ...
Maria Emília Yamamoto
exaly +2 more sources
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 +2 more sources
Mitochondrial DNA diversity, differentiation and phylogeography of the South American riverine and coastal dolphins Sotalia fluviatilis and Sotalia guianensis. [PDF]
Latin American Journal of Aquatic Mammals, 2010 Here we consider the phylogeography and population structure of the South American coastal and riverine dolphins, Sotalia guianensis and Sotalia fluviatilis, based on samples (n = 76) collected across more than 9000km of the species distribution.Phylogenetic reconstruction of 31 distinct haplotypes based on a combined analysis of two mitochondrial gene
Susana Caballero +10 more
openaire +3 more sources
Bone lesions in Sotalia fluviatilis (Cetacea) as a consequence of entanglement: Case report
Brazilian Journal of Veterinary Research and Animal Science, 2001 O objetivo do presente estudo foi descrever um grupo de lesões causadas por enredamento em Sotalia fluviatilis capturado acidentalmente por rede de pesca em 23 de julho de 1995 no Norte do Estado do Rio de Janeiro (21º37'S-041º01'W), Sudeste do Brasil.
RAMOS, Renata Maria Arruda +2 more
openaire +4 more sources
Sounds produced by the tucuxi (Sotalia fluviatilis) from the Napo and Aguarico rivers of Ecuador [PDF]
Latin American Journal of Aquatic Mammals, 2010 The acoustic structure and repertoire of the tucuxi (Sotalia fluviatilis) remain poorly studied. This lack of information limits our understanding of how acoustic signals evolved and the factors that promote variation across and within populations. Using a broadband recording system, we recorded 30 whistles from tucuxis in the Napo and Aguarico Rivers,
L. J. May-Collado, D. Wartzok
openaire +3 more sources
Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) [PDF]
Brazilian Journal of Biology, 2009 Analyses of non-metric characters of the skull and cervical vertebrae were performed among samples of dolphins of the genus Sotalia from the north, northeast and south Brazilian coast (S.
DC. Fettuccia +2 more
doaj +2 more sources
Predicting ecology and hearing sensitivities in Parapontoporia-An extinct long-snouted dolphin. [PDF]
Anat Rec (Hoboken)Abstract Analyses of the cetacean (whale and dolphin) inner ear provide glimpses into the ecology and evolution of extinct and extant groups. The paleoecology of the long‐snouted odontocete (toothed whale) group, Parapontoporia, is primarily marine with its depositional context also suggesting freshwater tolerance.
Sanks J, Racicot R.
europepmc +2 more sources
Frontiers in Marine Science, 2022 In Brazil, dolphins’ body parts are commonly used as traditional amulets, named as love-charms, while dolphins’ teeth are commercialized in handcrafted necklaces and bracelets.
Greicy F. Ruenes +13 more
doaj +1 more source
Identifying the current and future status of freshwater connectivity corridors in the Amazon Basin
Conservation Science and Practice, Volume 5, Issue 1, January 2023., 2023 Freshwater connectivity corridors of the Amazon Basin are critical to maintain river services and biodiversity. Among rivers >500 km in length, there are currently 93 freshwater connectivity corridors (FCCs) that are either free‐flowing or of good connectivity status; one‐fifth of these FCCs would lose their free‐flowing status with buildout of ...
Bernardo Caldas +20 more
wiley +1 more source