Article
Physiology
A. Fahlman, J. C. Mcknight, A. M. Blawas, N. West, A. G. Torrente, K. Aoki
Summary: This study examined the effects of expiration and inspiration on the if H response in bottlenose dolphins. The results showed that inspiration increased if H, while expiration decreased if H.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Engineering, Marine
Rachel Charish, Simon Berrow, Joanne O'Brien
Summary: The Shannon dolphins are a genetically discrete population residing in the Lower River Shannon SAC in Ireland. This study aimed to investigate their presence and foraging behavior in adjacent waters, revealing Brandon Bay as an important habitat for the Shannon dolphins.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Agriculture, Dairy & Animal Science
Marina Salas, Amanda Fernandez-Fontelo, Eva Martinez-Nevado, Jesus Fernandez-Moran, Agustin Lopez-Goya, Xavier Manteca
Summary: The assessment of animals' personalities by caretakers can be a reliable method to help make appropriate management decisions, such as breeding success and creating social groups. This study focused on evaluating the reliability of caretakers' ratings when assessing dolphins' personalities, showing a good degree of agreement within raters and centers, but also detecting systematic score mean differences.
Article
Biology
Daniela Silvia Pace, Carla Tumino, Margherita Silvestri, Giancarlo Giacomini, Giulia Pedrazzi, Gianni Pavan, Elena Papale, Maria Ceraulo, Giuseppa Buscaino, Giandomenico Ardizzone
Summary: This study describes and characterizes the bray-call sequences of common bottlenose dolphins in two sites of the Mediterranean basin. The study reveals geographic differences in the sequence repertoire, with the Tyrrhenian Sea population exhibiting greater diversity and complexity compared to the Sicilian population. The findings highlight the structural complexity of these vocalizations and suggest the need for further research on their possible functions.
Article
Biology
Maria del Carmen Fuentes-Albero, Silvia Abril Sanchez, Jose Luis Ros-Santaella, Eliana Pintus, Chiara Luongo, Sara Ruiz Diaz, Carlos Barros Garcia, Maria Jesus Sanchez Calabuig, Daniel Garcia Parraga, Francisco Alberto Garcia Vazquez
Summary: Dolphins are well-adapted aquatic mammals in captivity and are ideal for studying their reproductive features for conservation programs. Sperm shape and dimensions differ between male dolphins and can be classified into subpopulations, which are influenced by testosterone levels and refrigeration. This study provides new insights into sperm competition in dolphins and has implications for other endangered aquatic mammalian species.
Article
Biology
Ding Zhang, Yifan Wang, Joaquin Gabaldon, Lisa K. Lauderdale, Lance J. Miller, Kira Barton, Kenneth Alex Shorter
Summary: This study investigates the benefits of a fluke-and-glide gait for bottlenose dolphins in terms of cost of transport. The results show that the fluke-and-glide gait enhances the horizontal swimming efficiency of these dolphins.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
Valentina Corrias, Giovanni de Vincenzi, Maria Ceraulo, Virginia Sciacca, Antonello Sala, Giuseppe Andrea de Lucia, Francesco Filiciotto
Summary: The presence of dolphins in fishing areas can lead to economic losses for fishermen due to their depredation activities, and bycatch events are a major cause of mortality for conservation species. This study focuses on the acoustic parameters detected in whistle signals of Bottlenose dolphins during a bycatch event in the Adriatic Sea, revealing their acoustic plasticity and ability to communicate discomfort through their vocal repertoire.
Article
Behavioral Sciences
Bruno Diaz Lopez
Summary: This study examines the variations in the rate of social-signal production in free-ranging bottlenose dolphins and finds that it is related to the sex of the partner, mating season, and social affiliation. The study also suggests that the composition of the dyad and context-specific social-signals are influenced by seasonal changes in vocal behavior.
Article
Environmental Sciences
Ruth H. H. Carmichael, Matthew R. R. Hodanbosi, Mackenzie L. L. Russell, Noel L. L. Wingers
Summary: Human activity, through interaction and response efforts, has an impact on marine mammal stranding rates. A study on bottlenose dolphins in the northern Gulf of Mexico found an increase in strandings following the Deepwater Horizon oil spill. The case study in Alabama revealed spatial and temporal variations in strandings due to human influences. These findings are important for assessing damage, resource management and education, and the influence of response and monitoring agencies on stranding datasets.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
John Kucklick, Ashley Boggs, Kevin Huncik, Amanda Moors, Elizabeth Davis, Gina Ylitalo, Mary McConnell, Christina Makris, Randall S. Wells
Summary: Legacy persistent organic pollutants (POPs) in common bottlenose dolphins from Sarasota Bay have been declining from 2000 to 2016, with different rates of decline for different POP classes and classifications. The decline in POPs is highest in adult males and lowest in calves. The POP trends appear to have stabilized since 2009.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Veterinary Sciences
Jennifer P. Russell, Steven D. Osborn, Marina Ivancic, Juan J. Aristizabal-Henao, John A. Bowden, Nancy Stedman, Nicole Stacy
Summary: A 19-year-old bottlenose dolphin presented with inappetence and avoidant behavior. Treatment was administered to reduce the pleural effusion, but the condition eventually recurred and euthanasia was elected. Necropsy confirmed severe pleural effusion, pleural fibrosis, and mediastinal fibrosis in the dolphin.
JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION
(2022)
Article
Agriculture, Dairy & Animal Science
Daniela Rickert, Ralph Simon, Lorenzo von Fersen, Katrin Baumgartner, Thomas Bertsch, Clemens Kirschbaum, Michael Erhard
Summary: Animal welfare assessments are crucial in zoos and aquaria, and behavioral observations and stress hormone measurements are commonly used tools. This study found that the way blood samples are taken can affect cortisol levels in bottlenose dolphins, with lower levels during voluntary medical training compared to sampling on a lifting platform. There was no correlation between saliva cortisol and blood cortisol values, and saliva cortisol values increased significantly after feeding. Caution is recommended when sampling saliva and interpreting cortisol values.
Article
Agriculture, Dairy & Animal Science
Fabienne Delfour, Ruta Vaicekauskaite, Daniel Garcia-Parraga, Cristina Pilenga, Agathe Serres, Isabelle Brasseur, Ana Pascaud, Enrique Perlado-Campos, Guillermo J. Sanchez-Contreras, Katrin Baumgartner, Tania Monreal-Pawlowsky
Summary: For the first time, a study on the behavioural diversity of bottlenose dolphins groups in six European facilities was conducted, showing that factors such as observer location, number of individuals, age class, sex, social grouping influenced the diversity of behaviours within the observed groups. Despite certain limitations, the study demonstrated the feasibility of this approach for cetaceans under professional care and the relevance of considering this parameter in dolphin welfare studies.
Article
Environmental Sciences
Alessandro Gallo, Aglae Thieffry, Martin Boye, Kyra Monmasson, Martine Hausberger, Alban Lemasson
Summary: The study of animal communication has faced challenges in associating signals with specific emitters, especially in cetacean communication. However, researchers have now developed a low-cost device that allows for reliable identification of callers in dolphin vocalizations, which could contribute to a better understanding of dolphin acoustic communication.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Acoustics
Jason Mulsow, James J. Finneran, Dorian S. Houser, Robert F. Burkard, Madelyn G. Strahan, Ryan Jones
Summary: Studies on dolphin auditory brainstem response (ABR) have shown that the response to sound offset includes contributions from at least two distinct responses, with one possibly arising from activation of neural units shifted basally relative to stimulus frequency, and the other representing a true offset response from afferent centers further up the auditory pathway.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)