Article
Behavioral Sciences
Morgan J. Martin, Sara Torres Ortiz, M. Vanesa Reyes Reyes, Alexander Marino, Miguel Iniguez Bessega, Magnus Wahlberg
Summary: This study confirms the presence of a dual echolocation click strategy in Commerson's dolphins, making them the second species of their genus known to produce two types of biosonar. A quantitative analysis of Commerson's dolphin acoustic signal types is provided, along with a comparison of signal types between Commerson's dolphins and Heaviside's dolphins. This research combines drone footage with underwater acoustic recordings to measure the source level of toothed whale echolocation signals, offering a simpler and more cost-effective way to study sounds produced by marine mammals.
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
(2021)
Article
Multidisciplinary Sciences
Cristian Alberto Durante, Rocio Loizaga, Gregory R. McCracken, Enrique Alberto Crespo, Daniel E. Ruzzante
Summary: This study investigated the population genetics of Commerson's dolphin and found low genetic diversity compared to other dolphin species, but consistent within the genus. Strong population structure based on mitochondrial DNA indicated female philopatry, but this pattern was not detected using microsatellites, suggesting male-mediated gene flow.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Sebastian Kraft, MJose Perez-Alvarez, Carlos Olavarria, Rodrigo Moraga, C. Scott Baker, Debbie Steel, Paul Tixier, Christophe Guinet, Amelia Viricel, Paul Brickle, Marina Costa, Enrique Crespo, Cristian Durante, Rocio Loizaga, Elie Poulin
Summary: Commerson's dolphins are divided into two subspecies, with the Kerguelen Islands subspecies thought to have originated from South America. Genetic differences exist between the two subspecies, supporting the model of post-glacial colonization of the Kerguelen Islands by South American Commerson's dolphins.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Courtney Ogilvy, Rochelle Constantine, Sarah J. J. Bury, Emma L. L. Carroll
Summary: Understanding the foraging ecology of critically endangered marine predator, Maui dolphin, was investigated using stable isotope analysis. The results showed a decrease in isotopic niche space over time, with constant relative importance of prey types since 2008, suggesting population-level variations in foraging behavior.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Environmental Sciences
Daniela Silvia Pace, Sara Ferri, Giancarlo Giacomini, Chiara Di Marco, Elena Papale, Margherita Silvestri, Giulia Pedrazzi, Daniele Ventura, Edoardo Casoli, Giandomenico Ardizzone
Summary: Social factors and ecological drivers play a crucial role in shaping individual association patterns and influencing animals' responses to anthropogenic pressures. In common bottlenose dolphins in the central Mediterranean Sea, females exhibit stronger associations with other individuals, potentially due to their success in rearing young. Interactions with bottom trawl fishery result in weaker and short-term associations. The results suggest that dolphins in this region maintain a complex but resilient social structure that adapts to local biological requirements and anthropogenic pressures.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
William Carome, William Rayment, Elisabeth Slooten, M. Hamish Bowman, Stephen M. Dawson
Summary: Cetacean tourism and vessel traffic have increased significantly worldwide. In Akaroa Harbor, New Zealand, recreational vessel traffic, dolphin tourism, and cruise ship presence have also experienced substantial growth from 2008 to 2020. A study conducted during the austral summer of 2019-2020 revealed that higher levels of motor vessel traffic, the presence of cruise ships, and dolphin tour vessel traffic led to decreased acoustic detections of Hector's dolphins. The findings suggest that the dolphins were displaced from their core habitat in response to these vessel traffic parameters.
MARINE MAMMAL SCIENCE
(2023)
Article
Multidisciplinary Sciences
Julie Patris, Franck Malige, Madeleine Hamame, Herve Glotin, Valentin Barchasz, Valentin Gies, Sebastian Marzetti, Susannah Buchan
Summary: Coastal dolphins and porpoises in Chilean Patagonia, such as the Chilean dolphin, the Peale's dolphin, and the Burmeister's porpoise, face a threat from rapid human development. To study these poorly known species, new tools are urgently needed. One potential method is medium-term monitoring, combining continuous recording with a long-term click detector. The combination of recording and detection devices proves to be a good alternative for studying these species in remote areas.
Article
Multidisciplinary Sciences
Mauricio Cantor, Damien R. Farine, Susan Alberts
Summary: Interactions between humans and nature often have negative consequences, and behavioral and environmental changes can turn cooperative interactions into conflicts, threatening the survival of both species involved. A study of artisanal fishers and wild dolphins targeting migratory mullets reveals that foraging synchrony is crucial for the success of both predators. The dolphins herd the mullet schools towards the fishers' nets, providing them with more prey, while the fishers' casting behavior must match the dolphins' foraging cues. However, declines in mullet availability are jeopardizing this cooperation and pushing it towards extinction.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Behavioral Sciences
Joana Castro, Claudia Faustino, Andre Cid, Alicia Quirin, Fabio L. Matos, Rui Rosa, Heidi C. Pearson
Summary: This study investigates the factors influencing grouping and fission-fusion dynamics in common dolphins in Portugal. The presence of mother-calf pairs was found to have a major influence on party size, behavior, and fission-fusion rate in common dolphins. The study also confirms the importance of Southern Portugal as a calving and nursery area for this species.
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
(2022)
Article
Engineering, Marine
Giulia Cipriano, Francesca Cornelia Santacesaria, Carmelo Fanizza, Carla Cherubini, Roberto Crugliano, Rosalia Maglietta, Pasquale Ricci, Roberto Carlucci
Summary: This study provides insights into the site fidelity, residency patterns, and social structures of bottlenose dolphins in the Gulf of Taranto, aiming to support future management and conservation efforts. The findings reveal the presence of seasonal residents, visitors, and transient individuals, indicating complex associations and social organization within the population. Further investigations and a specific conservation plan are warranted for the entire area.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Richard C. Connora, Michael Krutzen, Simon J. Allen, William B. Sherwin, Stephanie L. King
Summary: Efforts to understand human social evolution often involve comparisons with nonhuman primates. However, a group of bottlenose dolphins in Shark Bay, Western Australia, exhibit chimpanzee-like traits, including a fission-fusion grouping pattern and strategic male alliances. The study reveals a large and differentiated alliance network among male dolphins, with connections to males outside of their alliance network. The duration of consortship with females is dependent on connections with third-order allies, indicating that alliances between groups increase reproductive success.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Zoology
Chiara G. Bertulli, Marianne H. Rasmussen, Massimiliano Rosso
Summary: Delphinids, including white-beaked dolphins, exhibit diverse social structures with non-random social relationships. Short-term and some long-term social relationships exist among white-beaked dolphins, with preferences for long-term associations. This study expands the latitudinal range for which social structure has been described for oceanic dolphin species.
INTEGRATIVE ZOOLOGY
(2021)
Article
Ecology
Michelle Caputo, Simon Elwen, Tess Gridley, Sophie A. Kohler, Jean-Paul Roux, Pierre William Froneman, Jeremy J. Kiszka
Summary: The study used stable isotope analysis to investigate resource partitioning and spatial differences in the feeding ecology of dusky dolphins and Heaviside's dolphins in two coastal sites in Namibia. The results showed significant differences in isotopic niches of the two predators, indicating resource partitioning and foraging habitat differences. Despite their smaller body size, Heaviside's dolphins feed at a higher trophic level than dusky dolphins. The study also revealed that both dolphin species feed on high trophic level prey at one site, while including smaller pelagic fish and squid at the other site.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Ecology
Cristian Alberto Durante, Enrique Alberto Crespo, Rocio Loizaga
Summary: Commerson's dolphin and Peale's dolphin, two sympatric species in the southwestern South Atlantic Ocean, show segregation in the use of trophic resources, with Peale's dolphin exhibiting more complexity in habitat utilization.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Environmental Sciences
Debbie Duffield, Randall Wells
Summary: Genetic analyses have played a crucial role in understanding the structure and social relationships of a long-term resident community of common bottlenose dolphins in Sarasota Bay. These analyses, spanning four generations, have revealed complex paternity and mating strategies within the community. The study suggests that gene flow in the community primarily occurs through males, with occasional contributions from outside males and females.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Ayelen Tschopp, Mariano A. Ferrari, Enrique A. Crespo, Mariano A. Coscarella
Article
Marine & Freshwater Biology
Enrique A. Crespo, Susana N. Pedraza, Silvana L. Dans, Guillermo M. Svendsen, Mariana Degrati, Mariano A. Coscarella
MARINE MAMMAL SCIENCE
(2019)
Article
Marine & Freshwater Biology
Mariana Degrati, Mariano A. Coscarella, Enrique A. Crespo, Silvana L. Dans
MARINE MAMMAL SCIENCE
(2019)
Article
Multidisciplinary Sciences
Magdalena Arias, Mariano A. Coscarella, M. Alejandra Romero, Nicolas Sueyro, Guillermo M. Svendsen, Enrique A. Crespo, Raul A. C. Gonzalez
Article
Multidisciplinary Sciences
Nicolas Sueyro, Enrique Alberto Crespo, Magdalena Arias, Mariano Alberto Coscarella
Article
Ecology
Olivier Gimenez, Lorena Mansilla, M. Javier Klaich, Mariano A. Coscarella, Susana N. Pedraza, Enrique A. Crespo
ECOLOGICAL MODELLING
(2019)
Article
Ecology
Debora Pollicelli, Mariano Coscarella, Claudio Delrieux
ECOLOGICAL INFORMATICS
(2020)
Article
Environmental Sciences
Ailen Chalcobsky, Enrique A. Crespo, Mariano A. Coscarella
MARINE ENVIRONMENTAL RESEARCH
(2020)
Article
Zoology
Mel Cosentino, David Nairn, Mariano Coscarella, Joseph C. Jackson, James F. C. Windmill
Summary: This article studied the behavior of a solitary dolphin named Kylie in the Firth of Clyde, finding that she interacts with harbor porpoises and emits different types of clicks.
BIOACOUSTICS-THE INTERNATIONAL JOURNAL OF ANIMAL SOUND AND ITS RECORDING
(2022)
Article
Anatomy & Morphology
Maria Constanza Marchesi, Anders Galatius, Martina Zaffino, Mariano Alberto Coscarella, Rolando Gonzalez-Jose
Summary: The study on vertebral morphology in cetaceans indicates that species within the Phocoenidae family have evolved to adapt to different habitats, with coastal species tending to decrease in size and oceanic species tending to increase in size. This shows a high level of evolutionary lability within the Phocoenidae family.
JOURNAL OF MORPHOLOGY
(2022)
Article
Marine & Freshwater Biology
Ailen Chalcobsky, Nestor A. Garcia, Mariano A. Coscarella, Enrique A. Crespo
MARINE MAMMAL SCIENCE
(2022)
Article
Marine & Freshwater Biology
Mariano Alberto Coscarella, Nicolas Sueyro, Enrique Alberto Crespo, Maria Grazia Pennino
MARINE MAMMAL SCIENCE
(2022)
Article
Environmental Studies
Virginia Mailen Tortolini, Mariana Degrati, Mariano Alberto Coscarella
Summary: The interaction between southern right whales and kelp gulls in Peninsula Valdes, Argentina has sparked debates, with gender and attribute frames influencing tourists' perceptions of the interaction effects and damage. Using positive frames to adjust exaggerated perceptions is recommended to promote environmental education and awareness.
Article
Environmental Sciences
Maria C. Marchesi, Matias S. Mora, Silvana L. Dans, Mariano A. Coscarella, Rolando Gonzalez-Jose
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Hospitality, Leisure, Sport & Tourism
Magdalena Arias, Mariano A. Coscarella, M. Alejandra Romero, Guillermo M. Svendsen, Matias Ocampo Reinaldo, Nadia S. Curcio, Enrique A. Crespo, Raul A. C. Gonzalez
TOURISM MANAGEMENT PERSPECTIVES
(2018)
