Dolphin Cognition and Behavior: A Comparative Approach

By Ronald J. Schusterman; Jeanette A. Thomas et al. | Go to book overview

III
COMMUNICATION IN DOLPHINS

Jeanette A. Thomas

Life in the water governs many of the characteristics of cetacean communication and has resulted in the evolution of unique adaptations for signal production and reception in an aquatic environment. For example, sound travels about four-and-a-half times faster in water than in air and range is frequency dependent. Low-frequency sound of sufficient amplitude (e.g., that of large mysticetes), if not masked by ambient noise, may be detected hundreds of miles from the source. Odontocetes produce broadband and very high amplitude sounds associated with echolocation. Hearing abilities are similarly broadband, requiring that elaborate processing be used to interpret echolocation signals.

In contrast, odontocetes do not have a well-developed olfactory sense. Although Tursiops has perianal glands which could conceivably function in chemocommunication, they probably are not used to the same extent as in terrestrial mammals for communication. Chemical signals in a marine environment tend to diffuse rapidly and would not be appropriate for a site-specific signal.

Distinctive color patterns in toothed whales (e.g., Orca, Phocoenoides, and Lagenorhynchus) suggest that visual signals are used in communication. However, vision varies among cetaceans (it has been lost in some of the river dolphins), and its usefulness may be restricted to short distances. Visual abilities have probably evolved as a compromised system that can be used in both air and water.

-271-

Notes for this page

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
One moment ...
Default project is now your active project.
Project items

Items saved from this book

This book has been saved
Highlights (0)
Some of your highlights are legacy items.

Highlights saved before July 30, 2012 will not be displayed on their respective source pages.

You can easily re-create the highlights by opening the book page or article, selecting the text, and clicking “Highlight.”

Citations (0)
Some of your citations are legacy items.

Any citation created before July 30, 2012 will labeled as a “Cited page.” New citations will be saved as cited passages, pages or articles.

We also added the ability to view new citations from your projects or the book or article where you created them.

Notes (0)
Bookmarks (0)

You have no saved items from this book

Project items include:
  • Saved book/article
  • Highlights
  • Quotes/citations
  • Notes
  • Bookmarks
Notes
Cite this page

Cited page

Style
Citations are available only to our active members.
Buy instant access to cite pages or passages in MLA, APA and Chicago citation styles.

(Einhorn, 1992, p. 25)

(Einhorn 25)

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Cited page

Bookmark this page
Dolphin Cognition and Behavior: A Comparative Approach
Table of contents

Table of contents

Settings

Settings

Typeface
Text size Smaller Larger Reset View mode
Search within

Search within this book

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

Help
Full screen
/ 394

matching results for page

    Questia reader help

    How to highlight and cite specific passages

    1. Click or tap the first word you want to select.
    2. Click or tap the last word you want to select, and you’ll see everything in between get selected.
    3. You’ll then get a menu of options like creating a highlight or a citation from that passage of text.

    OK, got it!

    Cited passage

    Style
    Citations are available only to our active members.
    Buy instant access to cite pages or passages in MLA, APA and Chicago citation styles.

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn, 1992, p. 25).

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences."1

    1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

    Cited passage

    Thanks for trying Questia!

    Please continue trying out our research tools, but please note, full functionality is available only to our active members.

    Your work will be lost once you leave this Web page.

    Buy instant access to save your work.

    Already a member? Log in now.

    Oops!

    An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.