Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Navigation in Mazes By a Grey Seal, Halichoer Us Gr Yp Us (Fabricius)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Buy this article

Price:
$30.00+ Tax (if applicable)
Add to Favorites

image of Behaviour

The ability of a grey seal, Halichoerus grypus, to navigate a variety of obstacle courses was examined under light and dark conditions in a 6.1 m diameter tank. Four maze patterns were constructed by varying the positions of 18 vertical rods in the tank. One hundred trials were conducted, each consisting of a 2 minute light phase followed by a 2 minute dark phase. The order of presentation of the maze patterns was randomly determined. All trials were monitored for sound. A phosphorescent tag was attached to the seal to allow monitoring of its movements in the dark. The mazes differentially modified the seal's path of travel. Average rates of movement were determined under four conditions: light with no maze present - 108 cm/sec; light with a maze present - 65 cm/sec; dark with no maze present - 15 cm/sec; and, dark with a maze present - 14 crn/sec. The seal displaced 7 obstacles in the light and 17 in the dark. Trials in the dark with errors had a significantly higher mean distance traveled than those without errors: x = 21.6 m vs x = 16.2 m, p<.05. Clicks, clusters of clicks, and hisses were recorded, mostly in the dark. There was a negative correlation between sound production and improved navigational ability. It is suggested the seal relied upon visual orientation in the light, and on tactile cues provided by the vibrissae coupled with memory in the dark.

Loading

Article metrics loading...

/content/journals/10.1163/156853978x00279
1978-01-01
2015-08-03

Affiliations: 1: Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island, U.S.A.

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to email alerts
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Name:*
    Email:*
    Your details
    Name:*
    Email:*
    Department:*
    Why are you recommending this title?
    Select reason:
     
     
     
     
    Other:
     
    Behaviour — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation