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Fig. 5. A magnetic map in spiny lobsters. Lobsters from the middle Florida Keys
were subjected to magnetic fields that exist in locations north or south of
the location where they were captured. As with juvenile green turtles,
lobsters subjected to the field from the northern site oriented approximately
southward, whereas those exposed to the field from the southern site crawled
approximately north. The open triangle outside each orientation diagram
indicates the actual direction to the capture site from the test site. In each
case, lobsters responded as if they had been displaced to the locations marked
by the stars rather than orienting in the direction that was actually toward
the capture site. Conventions are as in
Fig. 2. (Modified from
Boles and Lohmann, 2003.)
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