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Article: Mortality estimates of the intertidal purple snail Plicopurpura pansa in the Baja California Peninsula, Mexico.(Report)
- Article from:
- Journal of Shellfish Research
- Article date:
- December 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 National Shellfisheries Association, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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ABSTRACT The intertidal purple snail Plicopurpura pansa was intensively exploited for "Tyrian Purple," leading to declining populations and prohibition by the Mexican government of commercial exploitation. A probable cause for the decline is the difficulty of the snails to reattach themselves fast enough before being washed away by the high impact waves during high tides after being removed from the rocks to obtain 'ink.' To assess this hypothesis, six experiments were conducted at two rocky beaches in the Baja California Peninsula. Total mortality rates were estimated by a recapture probability model. Mortality rates ranged from 6.34 [y.sup.-1] to 14.23 [y.sup.-1] at ...
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Article: Museum Gets Hubble Photos
Beacon News, The (Aurora, IL);
April 26, 2005 ;
638 words
... ... so kids can use a low-range telescope to look at it, just like an astronomer would. The other picture -- the pink and purple snail -- is posted across from the museum's stairs, so kids can peer at it over the railing. Standing there Monday afternoon ...
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