Recovery Strategy for the Northern Riffleshell, Snuffbox, Round Pigtoe, Mudpuppy Mussel and Rayed Bean in Canada (Final)
- Executive Summary
- I. Background: 1. Species Information – Northern Riffleshell
- I. Background: 2. Species Information – Snuffbox
- I. Background: 3. Species Information – Round Pigtoe
- I. Background: 4. Species Information – Mudpuppy Mussel
- I. Background: 5. Species Information – Rayed Bean
- I. Background: 6. Threats
- I. Background: 7. Habitat – Northern Riffleshell
- I. Background: 8. Habitat – Snuffbox
- I. Background: 9. Habitat – Round Pigtoe
- I. Background: 10. Habitat – Mudpuppy Mussel
- I. Background: 11. Habitat – Rayed Bean
- I. Background: Habitat Role
- I. Background: Importance and Feasibility
- II. Recovery : Goal, Objectives and Approaches
- II. Recovery: Potential impacts, actions completed and evaluation
- Appendix 1 – Record of Cooperation and Consultation
10. Habitat – Mudpuppy Mussel
The Nature Conservancy (TNC 1999) states that the Mudpuppy Mussel is most commonly found in sand or silt under flat stones in areas of swift current, where it may be locally abundant. Such a habitat is consistent with the habitat of its host, the mudpuppy. Gordon and Layzer (1989) report that records are available from shallow sections of creeks to large rivers with calm to swift mid-depth current velocities, where it may be found in mud to cobble and boulder but primarily under large, flat rocks. Cummings and Mayer (1992) describe the habitat of this mussel as medium to large rivers on mud or gravel bars and under flat slabs or stones. During surveys in the Meramec River Basin in Missouri, Buchanan (1980) found Mudpuppy Mussels “…under large flat rocks in a gravel, cobble and boulder substrate in 3 inches of water in swift current.” In 1999, thirteen live specimens were located on the East Sydenham River near Florence in a similar habitat.
Mudpuppy Mussels are often found in great numbers, with up to several hundred individuals packed tightly together under a single flat rock. The reason why Mudpuppy Mussels are found in such large concentrations is related to the close association between the mussel and its host (Parmalee and Bogan 1998). Howard (1951) speculated that the mudpuppy feeds on adult Mudpuppy Mussels as it moves from one hiding place to another. During the process, it becomes heavily infested with glochidia. When the glochidia have matured, they are most likely released in the salamander's retreat, i.e., under another large, flat stones.
Currently Occupied Habitat
Methods for delineating currently occupied habitat for the Mudpuppy Mussel follow the methods described for the Northern Riffleshell.
Currently occupied habitat for the Mudpuppy Mussel can be defined as a 50 km reach of the East Sydenham River (Figure 23).
Within the area defined under Currently Occupied Habitat only areas meeting the characteristics described below are deemed to represent habitat in need of conservation:
- permanently wetted and
- of a stream order greater than 2 and
- sand (< 2mm) or silt deposits under large flat rocks
- steady to moderate flows (riverine populations only)
Historically Occupied Habitat
The Mudpuppy Mussel was historically known from several locations in the Detroit River as well as single records from Bear Creek in the Sydenham River watershed, the Thames River in London and the Lake St. Clair delta.
- Date Modified: