A5091660045- Marine animal studies overview
- Animal Vocal Communication and Behavior
- Underwater Acoustics Research
- Coral and Marine Ecosystems Studies
- Cephalopods and Marine Biology
- Fish biology, ecology, and behavior
- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Speech and Audio Processing
- Mercury impact and mitigation studies
- Animal and Plant Science Education
- Isotope Analysis in Ecology
- Wildlife Ecology and Conservation
- Water Quality Monitoring Technologies
- Ecology and Vegetation Dynamics Studies
- Primate Behavior and Ecology
- Ocean Acidification Effects and Responses
- Aquaculture Nutrition and Growth
- Species Distribution and Climate Change
- Amphibian and Reptile Biology
- Genetic diversity and population structure
- Avian ecology and behavior
- Chromosomal and Genetic Variations
Universidade Federal Rural da Amazônia
2021-2025
Universidade Federal do Rio de Janeiro
2023-2025
Universidade do Estado do Rio de Janeiro
2022-2025
Instituto de Desenvolvimento Sustentável Mamirauá
2019-2025
University of St Andrews
2019-2022
Universidade Federal do Pará
2012-2022
Sands
2020
Fundação de Estudos e Pesquisas Aquáticas
2020
Amazon Research Foundation
2018-2019
Amazon (United States)
2016
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 31:47-60 (2016) - DOI: https://doi.org/10.3354/esr00751 Risks of dam construction for South American river dolphins: a case study Tapajós River Heloise J. Pavanato1,*, Gabriel Melo-Santos2, Danielle S. Lima1,3, Marcela Portocarrero-Aya4, Mariana Paschoalini1,5, Federico Mosquera6, Fernando Trujillo6, Rafael Meneses1,7,...
ABSTRACT Although there are several studies on the skull of Amazonian manatees (Trichechus inunguis) to better understand anatomy, physiology, and behavior these animals, analysis brain has been often neglected. Typically, in osteological studies, is discarded preserve integrity skull. One main reasons for this neglect lack adequate dissection protocols allow extraction intact while preserving In study, we present a simple step-by-step protocol comprehensive procedure fixation manatee calves...
Populations of freshwater dolphins are declining in response to increased human pressure, including habitat degradation, overfishing, bycatch, poaching and obstruction free-flowing river corridors by dams. At least three dolphin species occur South America: the Amazonian dolphin, or boto (Inia geoffrensis), Bolivian boliviensis) tucuxi (Sotalia fluviatilis). A fourth species, Araguaian araguaiaensis), been proposed for Tocantins-Araguaia, a large basin northern Brazil. Here we show that...
Underwater noise from human activities is recognized as a world-wide problem, with important repercussions on the acoustic communication of aquatic mammals. During COVID-19 pandemic, government Panama went into nationwide lockdown to limit spread virus. This resulted in closing tourism infrastructure and limited mobility both land coastal areas. We used this “natural experiment” an opportunity study impact tour-boat dolphin by using passive monitoring data collected before during at Dolphin...
The recent discovery of the Araguaian river dolphin (Inia araguaiaensis) highlights how little we know about diversity and biology dolphins. In this study, described acoustic repertoire newly discovered species in concert with their behaviour. We analysed frequency contours 727 signals (sampled at 10 ms temporal resolution). These were analyzed using an adaptive resonance theory neural network combined dynamic time-warping (ARTwarp). Using a critical similarity value 96%, categorized into...
Abstract Species distribution modelling has been used to identify critical habitats for the delimitation of Marine Protected Areas. Although Areas may often overlap with key marine species, illegal human activities continue within these areas, causing negative impacts on local biodiversity. A generalized linear model spatial eigenvector mapping was investigate, first time, influence environmental variables and anthropic number Guiana dolphin, Sotalia guianensis sightings/grid, determine...
Summary Understanding the factors that determine habitat use and abundance of exploited species is essential to develop effective conservation strategies. We studied four forest pigeons on São Tomé Island assess species’ distribution patterns. determined ecological likely be associated with each habitats numbers, as well influence hunting pressure. In total, 35 km line transects were surveyed in rainy season at start dry season. Pigeons differed their habitats; there also strong seasonality...
The dolphins Inia geoffrensis—boto and Sotalia fluviatilis—tucuxi are threatened cetaceans inhabiting river ecosystems in South America; population numbers still lacking for many areas. This paper provides density abundance estimations of boto tucuxi 15 rivers sampled during the past nine years as part a multinational research alliance. Visual boat-survey data collection protocols analyses have been developed since 2012 (based on Distance Sampling methods) recently reviewed (2019) to improve...
Araguaian botos (Inia araguaiaensis) are known to produce pulsed as well tonal sounds. This study documents the first evidence for repetitive sequences of downsweep whistles in that appear be shared between individuals, and context their occurrence is investigated. Boat surveys were conducted along Tocantins River located Eastern Amazon over a period 42 days 2012 2018. Eighty-two groups observed, 43 h sound recordings acquired. 632 recorded 10 encounters. Four these encounters contained...
Vocal activity and signal characteristics of mammals are driven by several factors that result in both stability plasticity over multiple time scales. All three extant species manatee communicate with calls especially important for maintaining contact between cows calves. Determining if calf differ across will provide insights into the evolution species-specific acoustic communication traits. We investigated interspecific differences vocalizations calves Amazonian manatees (Trichechus...
Acoustic signals play a crucial role in communication among animals, particularly dolphins. Signature whistles, one of their most extensively studied vocalizations, enable dolphins to convey identity conspecifics through individually distinct whistle contours. However, it remains unclear whether rough-toothed ( Steno bredanensis ) also produce signature whistles with identifying contours and, if so, they are associated stress and poor health, such as bottlenose To bridge this knowledge gap,...
1. While cetaceans are known to produce large and complex acoustic repertoires, the challenges of exhaustively sampling sounds at sea counting relevant signals has precluded an understanding their true repertoire diversity. 2. Here we quantify compare whistle repertoires 16 populations in genus Sotalia, belonging two sister species, Guiana dolphin (Sotalia guianensis) tucuxi fluviatilis), both endemic Latin America. We used adaptive resonance theory neural network combined with dynamic...
Mixed species groups are usually associated with group protection to avoid predation. Reports of killer whale (Orcinus orca) occurrence and attacks scarce in Brazilian waters. Here we report the first case an attack by whales on a mixed humpbacks (Megaptera novaeangliae) southern right (Eubalaena australis). This is also humpback possibly interfering harassing whales. The recent increase populations Brazil may be influencing presence whales, which known
This study assessed the knowledge, feelings, and life experiences of students in public middle schools Brazilian Amazon towards aquatic mammals by applying semi-structured interviews, with a qualitative-quantitative approach. A total 241 students, from all genders, aged between 12 14 years old, four Pará State were interviewed. The data transcribed analyzed an inductive way, dialogue literature scientific education ethnozoology. methodology was developed validated during doctorate research...
Abstract Background Chromosomal painting in manatees has clarified questions about the rapid evolution of sirenians within Paenungulata clade. Further cytogenetic studies Afrotherian species may provide information their evolutionary dynamics, revealing important insights into ancestral karyotype clade representatives. The Trichechus inunguis (TIN, Amazonian manatee) was investigated by chromosome painting, using probes from manatus latirostris (TML, Florida to analyze homeologies between...
The recent discovery of the Araguaian river dolphin ( Inia araguaiaensis ) highlights how little we know about diversity and biology dolphins. In this study, described acoustic repertoire newly discovered species in concert with their behaviour free-ranging, human-habituated individuals. We analysed 393 signals that classified into 13 types tonal sounds (n=15) 66 pulsed calls (n=378). most common were short two-component calls. Thirty-five percent (n=140) these emitted by calves as they...
The recent discovery of the Araguaian river dolphin ( Inia araguaiaensis ) highlights how little we know about diversity and biology dolphins. In this study, described acoustic repertoire newly discovered species in concert with their behaviour free-ranging, human-habituated individuals. We analysed 393 signals that classified into 13 types tonal sounds (n=15) 66 pulsed calls (n=378). most common were short two-component calls. Thirty-five percent (n=140) these emitted by calves as they...
The recent discovery of the Araguaian river dolphin ( Inia araguaiaensis ) highlights how little we know about diversity and biology dolphins. In this study, described acoustic repertoire newly discovered species in concert with their behaviour free-ranging, human-habituated individuals. We analysed 393 signals that classified into 13 types tonal sounds (n=15) 66 pulsed calls (n=378). most common were short two-component calls. Thirty-five percent (n=140) these emitted by calves as they...