The Sensory World of Otariids

Hanke, Frederike D.; Reichmuth, Colleen; Cook, Peter F.

doi:10.1007/978-3-030-59184-7_16

Cited by 4 publications

(3 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Henceforth we focus on potential explanations and questions that could be asked in future studies to avoid over-interpreting this data set. We hope that future collaborative research will allow combining expert fieldwork methods (Martin et al, 2021a(Martin et al, , 2021bMartin, Gridley, Fourie, et al, 2022) with the multidimensional quantitative rhythmic analyses we present here and perhaps even strictly controlled experiments targeting temporal pattern perception (Hanke et al, 2021;Heinrich et al, 2020Heinrich et al, , 2022Verga et al, 2022).…”

Section: F I G U R Ementioning

confidence: 98%

Isochrony in barks of Cape fur seal (Arctocephalus pusillus pusillus) pups and adults

Osiecka,

Fearey,

Ravignani

et al. 2024

Ecology and Evolution

View full text Add to dashboard Cite

Animal vocal communication often relies on call sequences. The temporal patterns of such sequences can be adjusted to other callers, follow complex rhythmic structures or exhibit a metronome‐like pattern (i.e., isochronous). How regular are the temporal patterns in animal signals, and what influences their precision? If present, are rhythms already there early in ontogeny? Here, we describe an exploratory study of Cape fur seal (Arctocephalus pusillus pusillus) barks—a vocalisation type produced across many pinniped species in rhythmic, percussive bouts. This study is the first quantitative description of barking in Cape fur seal pups. We analysed the rhythmic structures of spontaneous barking bouts of pups and adult females from the breeding colony in Cape Cross, Namibia. Barks of adult females exhibited isochrony, that is they were produced at fairly regular points in time. Instead, intervals between pup barks were more variable, that is skipping a bark in the isochronous series occasionally. In both age classes, beat precision, that is how well the barks followed a perfect template, was worse when barking at higher rates. Differences could be explained by physiological factors, such as respiration or arousal. Whether, and how, isochrony develops in this species remains an open question. This study provides evidence towards a rhythmic production of barks in Cape fur seal pups and lays the groundwork for future studies to investigate the development of rhythm using multidimensional metrics.

show abstract

Section: F I G U R Ementioning

confidence: 98%

Isochrony in barks of Cape fur seal (Arctocephalus pusillus pusillus) pups and adults

Osiecka,

Fearey,

Ravignani

et al. 2024

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

“…As mysticetes are large, it is impossible to maintain them in captivity to perform robust behavioral studies. In this context, it is not surprising that our knowledge about sensory behavior is limited to smaller marine mammals such as harbor seals ( Phoca vitulina ), California sea lions ( Zalophus californianus ), and bottlenose dolphins ( Tursiops truncatus ; for review see Hanke and Reichmuth, 2022 ; Hanke et al, 2021 ; Hanke and Erdsack, 2015 ). Our current limited knowledge of the sensory systems in mysticetes is mainly deduced from opportunistic anatomical sampling or behavioral observations of free-ranging animals.…”

Section: Size-related Physiological Adaptations Of the Sensory System...mentioning

confidence: 99%

Open questions in marine mammal sensory research

et al. 2023

View full text Add to dashboard Cite

Although much research has focused on marine mammal sensory systems over the last several decades, we still lack basic knowledge for many of the species within this diverse group of animals. Our conference workshop allowed all participants to present recent developments in the field and culminated in discussions on current knowledge gaps. This report summarizes open questions regarding marine mammal sensory ecology and will hopefully serve as a platform for future research.

show abstract

“…If the pup identified the female model as a non-mother and thus as a potential threat, a strong response similar to those obtained with calls alone, would not have been observed. Despite advances in our understanding of pinniped sensory systems, the visual capabilities of pinnipeds to identify conspecific individuals remains unknown (Hanke et al 2021). However, it is most likely that their visual system will allow the pinnipeds to recognize individuals visually especially in bright light conditions…”

Section: Bimodal Experiments In Pupsmentioning

confidence: 99%

Mother–pup recognition mechanisms in Australia sea lion (Neophoca cinerea) using uni- and multi-modal approaches

2022

View full text Add to dashboard Cite

Communication is the process by which one emitter conveys information to one or several receivers to induce a response (behavioral or physiological) by the receiver. Communication plays a major role in various biological functions and may involve signals and cues from different sensory modalities. Traditionally, investigations of animal communication focused on a single sensory modality, yet communication is often multimodal. As these different processes may be quite complex and therefore difficult to disentangle, one approach is to first study each sensorial modality separately. With this refined understanding of individual senses, revealing how they interact becomes possible as the characteristics and properties of each modality can be accounted for, making a multimodal approach feasible. Using this framework, researchers undertook systematic, experimental investigations on mother-pup recognition processes in a colonial pinniped species, the Australian sea lion Neophoca cinerea. The research first assessed the abilities of mothers and pups to identify each other by their voice using playback experiments. Secondly they assessed whether visual cues are used by both mothers and pups to distinguish them from conspecifics, and / or whether females discriminate the odor of their filial pup from those from non-filial pups. Finally, to understand if the information transmitted by different sensory modalities is analyzed synergistically or if there is a hierarchy among the sensory modalities, experiments were performed involving different sensory cues simultaneously. These findings are discussed with regards to the active space of each sensory cue, and of the potential enhancements that may arise by assessing information from different modalities.

show abstract

The Sensory World of Otariids

Cited by 4 publications

References 99 publications

Isochrony in barks of Cape fur seal (Arctocephalus pusillus pusillus) pups and adults

Isochrony in barks of Cape fur seal (Arctocephalus pusillus pusillus) pups and adults

Open questions in marine mammal sensory research

Mother–pup recognition mechanisms in Australia sea lion (Neophoca cinerea) using uni- and multi-modal approaches

Contact Info

Product

Resources

About