Underwater Vocalization by Sea Lions: Social and Mirror Stimuli

  title={Underwater Vocalization by Sea Lions: Social and Mirror Stimuli},
  author={Ronald J. Schusterman and Roger L. Gentry and James. Schmook},
  pages={540 - 542}
Underwater vocal response of three sea lions (Zalophus californianus) increased under conditions of social interaction. When confronted by their mirror images, two animals increased their number of vocalizations, which included "whinny" sounds, barks, buzzing, and varying patterns of click trains. Click vocalizations showed habituation and recovery when the animals were in the presence of the mirror stimulus. 
Underwater Barking by Male Sea Lions (Zalophus californianus)
Sonograms of barks from Zalophus were presented and it was thought that it was unlikely that these barks originated entirely in air and suggested that they were transmitted into the water by vibration of the submerged throat area while the sea lion's nose and mouth were in air.
Play vocalisations and human laughter: a comparative review
ABSTRACT Complex social play is well-documented across many animals. During play, animals often use signals that facilitate beneficial interactions and reduce potential costs, such as escalation to
Neuroanatomy and Volumes of Brain Structures of a Live California Sea Lion (Zalophus californianus) From Magnetic Resonance Images
This article provides the first anatomically labeled, magnetic resonance imaging‐based atlas derived from a live marine mammal, the California sea lion, and reports three‐dimensional reconstructions and volumes of cerebrospinal fluid, cerebral ventricles, total white matter, cerebral hemispheres, and hippocampal structures all derived from magnetic resonance images.
Analysis and ranking of the acoustic disturbance potential of petroleum-industry activities and other sources of noise in the environment of marine mammals in Alaska. Final report
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Shaping and Discriminative Control of Underwater Click Vocalizations in a California Sea Lion
A captive vea lion (Zalophus californianus) which had never before produced clicking sounds in the laboratory was first conditioned to vocalize in air and subsequently learned to emit underwater
Underwater Click Vocalizations by a California Sea Lion: Effects of Visibility
A 2 yr. old captive sea lion (Zalophus californianus) presented with a discrimination task permitting little visibility of the targets gradually increased the frequency with which it made a series of
The role of vocalization in the social behaviour of the northern elephant seal
It is of interest that yearlings use the hiss as a threat and some yearling threat sounds are structurally intermediate between a hiss and the common roaring type of threat.
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This collection of 24 articles from Scientific American attempts to summarize the salient features of present knowledge of cell structure and function and should provide stimulating reading for those who would like a short review of modern developments in the study of the cell.
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