期刊
JOURNAL OF MOLLUSCAN STUDIES
卷 75, 期 -, 页码 153-157出版社
OXFORD UNIV PRESS
DOI: 10.1093/mollus/eyp006
关键词
-
资金
- Catholic University of Temuco, Chile [DGIUCT 2004.4.01]
- DGI [DCA 2007-01]
To evaluate the capacity for movement of freshwater mussels in sandy and sand-gravel substrates and to test their ability to differentiate among types and qualities of substrates, experiments were carried out in the laboratory and in the field, using Diplodon chilensis from Lake Panguipulli, Chile. The movement of mussels was greater in sandy than in sand-gravel substrates. In the absence of food, there was a significant preference for sandy substrate, and when mussels were offered sandy or sand-gravel substrates with and without food they chose the substrate with food with no preference to substrate type. Under natural conditions mussel presence and abundance along time is regulated by variables with a synergistic effect, niche of which substratum is not always the major one.
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