Accession Number:

AD0611961

Title:

LETHAL HIGH TEMPERATURES FOR THREE MARINE INVERTEBRATES: LIMULUS POLYPHEMUS, LITTORINA LITTOREA AND PAGURUS LONGICARPUS,

Descriptive Note:

Corporate Author:

ILLINOIS UNIV URBANA

Personal Author(s):

Report Date:

1960-01-01

Pagination or Media Count:

16.0

Abstract:

The lethal high temperatures were determined for three marine invertebrates, Limulus polyphemus, Littorina littorea, and Pagurus longicarpus, by employing constant exposure temperatures, exposure times between several minutes and several hours, and survival after 24 hours as criteria. For one-hour exposure they were found to be 44 degrees for Limulus, 40 to 41 degrees for Littorina, and 36 degrees for Pagurus. The importance of considering the time factor, using constant temperatures, and choosing proper criteria for judging survival has been stressed. The best criteria for survival were considered to be certain indices for normal behavior, in Limulus the habit to dig into sand, in Littorina the tendency to crawl up vertical surfaces, and in Pagurus the urge to reoccupy a snail shell when out of the shell. By comparison with the results for other marine invertebrates from other authors, the lethal temperatures found for Limulus and Littorina were very high. These data are considered as temperature adaptation in organisms which are habitually exposed to high temperatures. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE