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Scent of a coral: Symbiosis between 2 new barnacle species and a gorgonian host
Date:2/27/2013

l isolation of the area where the new species are found suggests the possibility of endemism.

The newly discovered barnacles are both gorgonian inhabiting. Observations by the authors suggest that they also demonstrate preference to a particular gorgonian hosts. This peculiar behavior is reflected in the name of one of the newly described species, Conopea fideli, referring to the 'fidelity' of the barnacle towards its host of preference. The host gorgonians are a particular type of beautiful octocoral, also known as sea fans. Once locating the host, the barnacle then lives in complete symbiosis with the gorgonian, almost fully covered by host tissue.

To date, not all the details of barnacle larvae settlement and interaction with the gorgonian host are known, but it seems that barnacle larvae are able to choose between the different gorgonians in their search for a host. This rather high degree of symbiotic relationship, almost like a love story, is believed to be mediated by pheromones. It has been demonstrated that barnacle larvae can determine where to settle by recognizing pheromone cues from their host. It has also been shown that gorgonians produce barnacle settlement inducers as well as inhibitors.

The lead author of the article, Dana Carrison-Stone from the Department of Invertebrate Zoology and Geology, California Academy of Sciences, comments: "Although the details of the settling barnacle larvae and gorgonian interaction are not completely known, it appears, from our observations (specifically that Conopea fidelis was found only on Muriceopsis tuberculata) that barnacle larvae may be capable of distinguishing between gorgonian species. Of course, more collections, identifications, and laboratory work testing settlement preference would be needed to answer this question."


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Contact: Dana Carrison-Stone
dcarrison@calacademy.org
415-379-5248
Pensoft Publishers
Source:Eurekalert  

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Scent of a coral: Symbiosis between 2 new barnacle species and a gorgonian host
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