Dale Hodgins wrote:The price of beaver pelts has been very low for a long time. In the seventies, a good pelt could bring $150. Now, $10 can be made sometimes. This has greatly reduced trapping pressure.
When left alone, beavers repopulate quickly. Migrating offspring have a 50% chance of falling victim to predators. If young are transported to a suitable new home, their chances of survival are very good.
Miles Flansburg wrote:I will have to try that out at my place Bill.
Have they seen the beaver come back to these places after the dams are built?
This is actually a pilot study program, so data is limited, but yes the San Rafael swell pilot project installed last year is already showing promise for a full recovery.
Will they let you transplant any to Jays place?
The head ranger for the area was part of the crew installing the dams, so he is all for reintroduction, but Dr. Wheaton wants to wait for at least a year after the completion of all 100 dams next year before trapping and manually reintroducing them.
How long do they last before they wash out again?
There are too many factors to answer this completely. It seems that the most common failure is due to the water going under the dam, scouring the stream bottom and the whole thing opens up like a gate. We load a lot of stones in the critical areas to prevent this and hope to achieve longevity in the several years to decade range. This should be long enough to establish new stream channels and restore the hydrologic balance. The lack of durability is compensated by sheer numbers of structures.
Do you have to maintain them?