The Antillean manatee produces broadband vocalizations with ultrasonic frequencies

Ramos, Eric A.; Maust‐Mohl, Maria; Collom, Kristi A.; Brady, Beth; Gerstein, Edmund; Magnasco, Marcelo O.; Reiss, Diana

doi:10.1121/10.0000602

Cited by 15 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another relevant category is 'Conservation' (16.6%), which includes quantitative or qualitative descriptions of threats to manatee viability/health such as boat collisions (e.g., Borges et al, 2007), poaching (e.g., Jiménez-Pérez, 2002), contaminants (e.g., Anzolin et al, 2012; Romero-Calderón et 1980-1982 1983-1987 1988-1992 1993-1997 1998-2002 2003-2007 2008 1980-1982 1983-1987 1988-1992 1993-1997 1998-2002 2003-2007 2008 (e.g., Vanoye, 2002;Silva et al, 2009;Takeuchi et al, 2016). In the topic behavior (10.3%), papers approaching aspects on manatee communication (e.g., Alicca et al, 1997;Sousa-Lima et al, 2008;Umeed et al, 2018;Merchan et al, 2019;Ramos et al, 2020), learning and welfare (e.g., Hénaut et al, 2020), husbandry (Lima et al, 2005), circadian rhythm (Holguin-Medina et al, 2015), habitat preferences (e.g., Ramírez-Jiménez et al, 2017), and movements and migrations (e.g., Castelblanco-Martínez et al, 2013) were found.…”

Section: Resultsmentioning

confidence: 99%

Accomplishments and challenges of the research on Antillean manatee: A bibliometric analysis

Castelblanco‐Martínez

Gonzalez‐Socoloske²,

Cabrias³

et al. 2023

Lat. Am. J. Aquat. Mamm.

View full text Add to dashboard Cite

The Antillean manatee (Trichechus manatus manatus) is an endangered subspecies of the West Indian manatee inhabiting countries of South America, Meso America and the Caribbean. Basic and applied research is necessary to inform management plans for the effective recovery of this subspecies. The purpose of this study was to systematically review literature regarding Antillean manatees, without restriction of the research topic. Article selection and screening process are described. Our final database consisted of 456 publications, of which peer-reviewed literature (articles, reviews, and notes in research journals) represent the most important type (63.4%), followed by BSc, MSc, and PhD theses (28.1%). Most of the research (70%) was conducted on wild manatees, 21,5% under human care conditions, and the rest a combination of both; the most common topics of study were ‘ecology’, ‘conservation’, ‘morphology, anatomy and physiology’, and ‘behavior’. The literature on Antillean manatee has expanded significantly over the last two decades across the region, with most of the research published in just the last five (25.4%) to 10 (44.6%) years. Most of the published work has been by Brazilian, Mexican, and Colombian researchers. However, an important amount of research remains as theses in Portuguese or Spanish limiting the dissemination of results. Relevant limitations for research and publication in Latin American countries may have an impact on the published literature on Antillean manatees, including scarce funding, poor facilities, language-related difficulties, and lack of a culture of publication. Avenues to melt scientific barriers may include increasing governmental investment on research, strengthening international networks, and improving the support to publish in high-impact journals.

show abstract

Section: Resultsmentioning

confidence: 99%

Accomplishments and challenges of the research on Antillean manatee: A bibliometric analysis

Castelblanco‐Martínez

Gonzalez‐Socoloske²,

Cabrias³

et al. 2023

Lat. Am. J. Aquat. Mamm.

View full text Add to dashboard Cite

show abstract

“…Future studies should include a larger sample size and a broader range of captive and wild environments (e.g., Ramos et al, 2020) to determine whether age or captivity drives any similarities or differences in vocal behavior.…”

Section: Discussionmentioning

confidence: 99%

Antillean manatee calves in captive rehabilitation change vocal behavior in anticipation of feeding

Ramos,

Brady,

Lasala

et al. 2023

Zoo Biology

Self Cite

View full text Add to dashboard Cite

Captive animals typically develop anticipatory behaviors, actions of increased frequency done in anticipation of an event such as feeding. Anticipatory behaviors can be an indicator of an animal's welfare. However, for rehabilitating animals that are expected to be reintroduced into the wild, these behaviors need to be extinguished to ensure successful release. Scheduled activities such as feeding occur daily and vocalizations could potentially be used to identify anticipatory behavior. Here, we tested the hypothesis that manatee calves modify their vocal production rate as a form of anticipatory behavior. Vocalizations of two Antillean manatee (Trichechus manatus manatus) calves were recorded for 10 min before, during, and after feeding sessions at Wildtracks, a manatee rehabilitation center in Belize. The number of calls were counted across recording sessions and three acoustic parameters were measured from calls including duration, frequency modulation, and center frequency. A repeated measures ANOVA comparing the number of calls across sessions indicated manatees produced significantly more calls before feeding sessions than during and after sessions. In addition, manatees increased the duration and lowered the frequency of calls before feeding sessions. This information can give further insight on ways to improve rehabilitation protocols and manage human interactions to increase the overall survival rate of rehabilitated manatees when released back into the wild.

show abstract

“…Most of the information about Sirenian vocal behavior comes from studies of the two West Indian manatee subspecies: the Florida and Antillean manatees. Brady et al (2020) described their vocal repertoire as graded, with calls ranging from tonal sounds with harmonics that can extend into the ultrasonic range (> 20 kHz; Ramos et al, 2020) to atonal sounds that lack harmonic components (Mann et al, 2006).…”

Section: Structure and Function Of Vocalizationsmentioning

confidence: 99%

Elephants and Sirenians: A Comparative Review across Related Taxa in Regard to Learned Vocal Behavior

Baotic¹,

Brady²,

Ramos³

et al. 2022

CCBR

Self Cite

View full text Add to dashboard Cite

Vocal production learning is the ability to modify a vocal output in response to auditory experience. It is essential for human speech production and language acquisition. Vocal learning evolved independently several times in vertebrates, indicating evolutionary pressure in favor of this trait. This enables cross-species comparative analysis to be used to test evolutionary hypotheses. Humans share this ability with a versatile but limited group of species: songbirds, parrots and hummingbirds, bats, cetaceans, seals, and elephants. Although case studies demonstrate that African savanna and Asian elephants are capable of heterospecific imitation, including imitation of human words, our understanding of both the underlying mechanisms and the adaptive relevance within the elephant's natural communication system is limited.Even though comparing phylogenetically distant species is intriguing, it is also worthwhile to investigate whether and to what extent learned vocal behavior is apparent in species phylogenetically close to an established vocal learner. For elephants, this entails determining whether their living relatives share their special ability for (complex) vocal learning.In this review, we address vocal learning in Elephantidea and Sirenia, sister groups within the Paenungulata. So far, no research has been done on vocal learning in Sirenians. Because of their aquatic lifestyle, vocalization structure, and evolutionary relationship to elephants, we believe Sirenians are a particularly interesting group to study. This review covers the most important acoustic aspects related to vocal learning in elephants, manatees, and dugongs, as well as knowledge gaps that must be filled for one to fully comprehend why vocal learning evolved (or did not) in these distinctive but phylogenetically related taxa.

show abstract

The Antillean manatee produces broadband vocalizations with ultrasonic frequencies

Cited by 15 publications

References 19 publications

Accomplishments and challenges of the research on Antillean manatee: A bibliometric analysis

Accomplishments and challenges of the research on Antillean manatee: A bibliometric analysis

Antillean manatee calves in captive rehabilitation change vocal behavior in anticipation of feeding

Elephants and Sirenians: A Comparative Review across Related Taxa in Regard to Learned Vocal Behavior

Contact Info

Product

Resources

About