Life strategies and habitat preferences of two competing species: Erpobdella octoculata and Erpobdella vilnensis (Annelida: Hirudinea)
| Authors | |
|---|---|
| Year of publication | 2005 |
| Type | Article in Proceedings |
| Conference | Symposium RIVER BOTTOM VI Brno, Book of Abstracts |
| MU Faculty or unit | |
| Citation | |
| Field | Zoology |
| Keywords | life strategies; habitat preferences; Hirudinea; Erpobdella |
| Description | The Hirudinea community was studied over two years (May 1999 April 2001) in the lowland sixth order river Rokytná (Czech Republic) on four sampling points, which were different in such parameters as water velocity, depth and substratum. Erpobdella octoculata and E. vilnensis represented two dominant species from seven recorded Hirudinea species. Because the situation on the river bottom changed permanently, we measured the water depth and velocity and for each sample calculated the Froude number (Fr). According to the ranges of Fr values the samples were then sorted into three categories (from the sub-critical to the critical flow). So we did not compare habitat preferences of leeches to the same sampling point but preferences of certain hydrodynamic conditions. |
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