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University of California's unofficial favorite sea slug poised to make a comeback
Date:3/18/2013

(Santa Barbara, Calif.) After almost four decades of absence from local waters, a special sea slug appears to be making a comeback, and marine scientists at UC Santa Barbara are eagerly anticipating its return.

With its vivid blue and gold colors and its discovery by UC zoologists in 1901, the nudibranch Felimare californiensis, also known as the California chromodorid, has been a favorite species of sea slug for UC marine scientists and students for decades. But while it held a special place in their hearts, it lost its place in local waters, which once included La Jolla, Corona del Mar, Malibu, and Santa Barbara, as well as all but the two westernmost Channel Islands.

"We'll be pretty excited if someone finds the nudibranch in mainland tidepools, after this 35-year hiatus," said Jeff Goddard, project scientist with UCSB's Marine Science Institute. His findings have been published online in a recent edition of the journal Marine Biology.

In the 1970's, the abundant F. californiensis started to disappear from Southern California, and by 1984, was extinct in the region. Its disappearance from the mainland, said Goddard, is unique among the 130 species of sea slugs known to inhabit California waters.

"Its decline is not shared by closely related nudibranchs with similar historical geographic distributions and mode of development," said Goddard, "and is not predicted by warming trends and climate variation over the past 40 years, including the strong El Nio events of 1983 and 1998."

In their paper, Goddard and his collaborators conclude that water pollution from the heavily populated and urbanized southern California mainland is the most likely factor, compounded by historical over-collecting of the nudibranch and habitat loss through the development of major ports and marinas. The researchers suspect that degraded water quality, which reached a low point in the Southern California Bight in the 1
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Contact: Sonia Fernandez
sonia.fernandez@ia.ucsb.edu
805-893-4765
University of California - Santa Barbara
Source:Eurekalert  

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University of California's unofficial favorite sea slug poised to make a comeback
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