Which of the following actions is not effective in muskrat control?

Lining the shoreline with vegetation is not an effective method for controlling muskrat populations for several reasons. Muskrats are naturally drawn to areas with dense vegetation, particularly where they can find food sources and build their lodges. By introducing or maintaining vegetation along the shoreline, you may inadvertently provide a suitable habitat for muskrats, which can lead to an increase in their population rather than a decrease.

In contrast, proper dam design can help manage water levels and discourage muskrat habitation by altering their access to preferred breeding and feeding sites. Trapping during specific seasons can effectively reduce muskrat numbers, as it targets them when their populations are most vulnerable or when they are most active. Removing excess vegetation, such as cattails, can also deter muskrats by eliminating their food sources and nesting areas. Therefore, lining the shoreline with vegetation does not contribute to effective muskrat control and can even be counterproductive.