Results 51 to 60 of about 1,295 (173)

Conflicts between river dolphins (Cetacea: Odontoceti) and fisheries in the Central Amazon: a path toward tragedy?

Zoologia (Curitiba), 2012
Dolphin interactions with fishermen have increased significantly and pose potential risks to the boto, Inia geoffrensis (Blainville, 1817), and the tucuxi, Sotalia fluviatilis (Gervais & Deville, 1853).
Luiz Cláudio Pinto de Sá Alves, Camilah Antunes Zappes, Artur Andriolo   +2 more
doaj   +1 more source

Feeding habits of marine tucuxi, Sotalia fluviatilis, at Ceará State, northeastern Brazil

Latin American Journal of Aquatic Mammals, 2003
1 Universidade Federal do Ceara, Departamento de Engenharia de Pesca, Mestrado em Engenharia de Pesca. Bloco 827, Campus do Pici, Fortaleza, CE, 60035-000, Brazil. E-mail: livgurjao@yahoo.com. 2 Universidade Federal do Ceara, Departamento de Engenharia de Pesca, Biomol-Lab/Elace. Bloco 827, Campus do Pici, Fortaleza, CE, 60035-000, Brazil.
L. M. Gurjão, M. A. A. Furtado Neto, R. A. Santos, P. Cascon   +3 more
openaire   +2 more sources

River Cetaceans and Habitat Change: Generalist Resilience or Specialist Vulnerability?

Journal of Marine Sciences, Volume 2012, Issue 1, 2012., 2012
River dolphins are among the world’s most threatened mammals, and indeed the baiji (Lipotes vexillifer), a species endemic to China′s Yangtze River, is likely extinct. Exploitation for products such as meat, oil, and skins has been a lesser feature in the population histories of river dolphins compared to most large mammals.
Brian D. Smith, Randall R. Reeves, E.C.M. (Chris) Parsons   +2 more
wiley   +1 more source

Mitochondrial DNA diversity, differentiation and phylogeography of the South American riverine and coastal dolphins Sotalia fluviatilis and Sotalia guianensis.

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, Fernando Trujillo, Juliana A. Vianna, Héctor Barrios–Garrido, Marynés Montiel, Sandra Beltrán-Pedreros, Míriam Marmontel, M. A. L. Santos, Marcos R. Rossi‐Santos, Fabrício R. Santos, C. Scott Baker   +10 more
openaire   +2 more sources

Translating science into actions to conserve Amazonian freshwaters

Conservation Science and Practice, Volume 6, Issue 11, November 2024.
Freshwaters of the Amazon are experiencing unprecedented changes, but decades of research and practice have produced a rich foundation for advancing management solutions. Through a comprehensive review of the scientific literature on Amazon freshwater conservation, we highlighted 63 conservation actions that combined are critical for the long‐term ...
Thiago B. A. Couto, Clinton N. Jenkins, Claire F. Beveridge, Sebastian A. Heilpern, Guido A. Herrera‐R, Natalia C. Piland, Cecilia Gontijo Leal, Jansen Zuanon, Carolina R. C. Doria, Mariana Montoya, Mariana Varese, Sandra B. Correa, Michael Goulding, Elizabeth P. Anderson   +13 more
wiley   +1 more source

Perceptions and reality in fisher coexistence with aquatic predators in the Peruvian Amazon

Animal Conservation, Volume 27, Issue 4, Page 566-579, August 2024.
The perceptions and reality of ‘human–wildlife conflict’ are infrequently compared, but this relationship is key to determining how negative outcomes can be mitigated. We trained fishers to complete fishing registers to record damage to nets by six large aquatic piscivores (two caiman, two dolphins, two otters) in Amazonian Peru, and compared these ...
M. Recharte, P. Lee, D. Meza, S.‐J. Vick, M. Bowler   +4 more
wiley   +1 more source

Alterações senil-degenerativas e variações anatômicas na coluna vertebral de pequenos cetáceos

Biotemas, 1999
Apresenta-se uma visão comparativa das alterações senil-degenerativas e anomalias anatômicas da coluna vertebral de oito espécies de pequenos cetáceos: Tursiops truncatus (Montagu, 1821); Steno bredanensis (Lesson, 1823); Sotalia fluviatilis guianensis ...
Maria Heloísa B. C. Furtado, Paulo César Simões-Lopes   +1 more
doaj  

Risks of dam construction for South American river dolphins: a case study of the Tapajós River

Endangered Species Research, 2016
River dolphins are strongly affected by the construction of hydroelectric dams. Potential isolation in subpopulations above and below such dams and the resulting low genetic variability of these subpopulations can cause extinction at a local level.
Pavanato, HJ, Melo-Santos, G, Lima, DS, Portocarrero-Aya, M, Paschoalini, M, Mosquera, F, Trujillo, F, Meneses, R, Marmontel, M, Maretti, C   +9 more
doaj   +1 more source

Repeated downsweep vocalizations of the Araguaian river dolphin, Inia araguaiaensis [PDF]

, 2020
Funding was provided by the Swarosvki Foundation and World Wide Fund for Nature Brazil.Araguaian botos (Inia araguaiaensis) are known to produce pulsed as well as tonal sounds. This study documents the first evidence for repetitive sequences of downsweep
Janik, Vincent M., Marmontel, Miriam, Melo-Santos, Gabriel, Oliveira-da-Costa , Marcelo, Walmsley, Sam F.   +4 more
core   +2 more sources

Biology of the marine tucuxi dolphin (Sotalia fluviatilis) in south-eastern Brazil [PDF]

Journal of the Marine Biological Association of the United Kingdom, 2004
Age, growth and reproductive parameters related to the marine tucuxi are presented, as well as feeding habits and parasitism. The specimens' age ranged from zero (newborn) to 21 years for males and 0·5 to 30 years for females. In relation to the body dimension, length distributions were bell-shaped for both sexes with male marine tucuxi ranging from 86·
Ana Paula Madeira Di Beneditto, Renata Maria Arruda Ramos   +1 more
openaire   +1 more source