Mytilus edulis and M. trossulus are the two molluscan species co-occurring along the Gaspé coast, eastern Canada. Few studies examine the effects of environmental factors (temperature, salinity, tidal height and wave action) on the local or regional distribution of these two species in areas where they co-occur. This study is designed precisely to examine the niche of each of the two species, particularly in relation to environmental factors in the northeastern part of the Gulf of St. Lawrence, Canada. Mussels were sampled on rocky shores according to a factorial design including six locations, 3 degrees of wave exposure (exposed, semi exposed and sheltered) and 2 intertidal levels (mid and low). Species were distinguished with polymerase chain reaction amplification using a diagnostic DNA marker (Glu-5). Relative frequencies of each species showed no clear patterns of distribution with wave exposure or tidal height. A pattern of distribution at the regional scale does occur, but this pattern could not be related to salinity or temperature gradients observed.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 24 • No. 2