Caroline Casey

Caroline Casey
University of California, Santa Cruz | UCSC · Department of Ecology & Evolutionary Biology

Doctor of Philosophy

About

26
Publications
2,475
Reads
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317
Citations
Citations since 2017
16 Research Items
292 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
Additional affiliations
September 2012 - present
University of California, Santa Cruz
Position
  • PhD Student
September 2012 - present
University of California, Santa Cruz
Position
  • PhD Student

Publications

Publications (26)
Chapter
Communication plays a fundamental role in the social behavior of phocids, as individuals gain valuable information that aids in kin recognition, mate selection, and rival assessment. In this chapter, we provide an overview of the communication strategies used by phocid seals, which include acoustic, olfactory, and visual elements. We discuss the so...
Article
Full-text available
Human noise can be harmful to sound-centric marine mammals. Significant research has focused on characterizing behavioral responses of protected cetacean species to navy mid-frequency active sonar (MFAS). Controlled exposure experiments (CEE) using animal-borne tags have proved valuable, but smaller dolphins are not amenable to tagging and groups o...
Article
Bonding between mothers and their young is fundamental to mammalian reproductive behaviour and individual fitness. In social systems where the risk of confusing filial and non-filial offspring is high, mothers should demonstrate early, strong and consistent responses to their kin throughout the period of offspring dependence, irrespective of matern...
Article
Full-text available
The most flexible communication systems are those of open-ended vocal learners that can acquire new signals throughout their lifetimes. While acoustic signals carry information in general voice features that affect all of an individual's vocalizations, vocal learners can also introduce novel call types to their repertoires. Delphinids are known for...
Article
The sense of touch in the largest marine mammals is poorly understood. While mysticetes possess specialized sensory hairs that are present through adulthood, descriptions of these structures are based almost entirely on examination of tissues in post‐mortem individuals. Sensory hairs have rarely been observed and described in living whales. We phot...
Article
No PDF available ABSTRACT Sympatric short- and long-beaked common dolphins in the Southern California Bight (Delphinus delphis and D. delphis bairdii) are challenging to identify acoustically because their whistles overlap in many time-frequency characteristics. We therefore asked whether frequency modulation patterns can help with species identifi...
Article
Dominance hierarchies structure the adult social networks of many mammals. To identify the conditions that support the establishment of stable hierarchical relationships within groups of familiar rivals, we explored the ontogeny of spatial, social and communicative behaviour among male northern elephant seals, Mirounga angustirostris. We demonstrat...
Chapter
The process of learning plays a pivotal role when an animal must correctly identify individuals within a dynamic social group. In male–male competition for access to reproductive success, a male’s ability to learn the calls that are associated with one’s rival can help to maintain structured dominance relationships and reduce the costs associated w...
Article
Northern elephant seals (Mirounga angustirostris) are massive, land-breeding marine mammals that produce loud, stereotyped calls during annual breeding seasons. To determine vocalization source levels emitted by competing males on a mainland breeding rookery, aerial calls were measured on-axis at 1 m from adult males using three different sound pre...
Article
No PDF available ABSTRACT Acoustic signaling is the predominant form of communication between cetaceans, and understanding the behavioral state of calling individuals can provide insights into their function. We used multi-sensor tags equipped with concurrent video and acoustic recorders to characterize the vocal repertoire and associated behavior...
Article
No PDF available ABSTRACT To identify the conditions that support the development of hierarchical relationships within networks of familiar competitive rivals, we consider the ontogeny of area use, social relationships, and communicative behavior among male northern elephant seals (Mirounga angustirostris). We cross-sectionally sampled the behavior...
Article
This study measured the degree of behavioral responses in blue whales (Balaenoptera musculus) to controlled noise exposure off the southern California coast. High-resolution movement and passive acoustic data were obtained from non-invasive archival tags (n=42) whereas surface positions were obtained with visual focal follows. Controlled exposure e...
Article
Full-text available
Vocal dialects are fundamental to our understanding of the transmission of social behaviours between individuals and populations, however few accounts trace this phenomenon among mammals over time. Northern elephant seals (Mirounga angustirostris) provide a rare opportunity to examine the trajectory of dialects in a long-lived mammalian species. Di...
Article
The evolutionary origin of rhythm perception, a cognitive ability essential to musicality, remains unresolved [1-5]. The ability to perceive and memorize rhythmic sounds is widely shared among humans [6] but seems rare among other mammals [7, 8]. Although the perception of temporal metrical patterns has been found in a few species, this ability has...
Article
Nature has shaped effective biological sensory systems to receive complex stimuli generated by organisms moving through water. Similar abilities have not yet been fully developed in artificial systems for underwater detection and monitoring, but such technology would enable valuable applications for military, commercial, and scientific use. We set...
Conference Paper
Determining the range over which a signal can be detected can clarify the relationship between a signal’s structure and its function. This is especially true when considering the spatial and social dynamics of breeding populations, as source levels can be used to estimate the communicate range of a signal in a given noise background. This study pro...
Article
Full-text available
Specialized signals emitted by competing males often convey honest information about fighting ability. It is generally believed that receivers use these signals to directly assess their opponents. Here, we demonstrate an alternative communication strategy used by males in a breeding system where the costs of conflict are extreme. We evaluated the a...
Conference Paper
Northern elephant seals (Mirounga angustirostris) have a polygynous breeding system in which adult males establish dominance hierarchies that determine access to females. Acoustic signaling plays an important role in settling fights between males, as stereotyped displays elicit appropriate behavioral responses from individuals without contact durin...
Article
A study that was conducted to examine the vocal signature of the male northern elephant seal is presented. Northern elephant seals breed annually during the winter months at islands and mainland rookeries along the western coast of the United States and Mexico. These animals maintain a highly polygynous breeding system in which adult males establis...
Article
Full-text available
Northern elephant seals (Mirounga angustirostris) are large, highly polygynous mammals that have a breeding system based on the defense of female harems by dominant males. Female reproductive cycles are synchronous and seals gather in large numbers on natal beaches each year to give birth and breed prior to departing for long foraging migrations at...

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