(Lutra canadensis)
Q: How many river otters are in Iowa?
A: In the proposed open area, approximately 4500; statewide
approximately 6000-8000.
Q: Where are river otters found in Iowa?
A: River otters can be found along rivers, streams and lakes
throughout Iowa. River otter successful
reproduction has been documented in all 99 counties in Iowa. They are most abundant in the proposed area that
would be open for harvesting, however some watersheds in the closed area
sustain healthy populations of river otters.
Q: How many river otters are incidentally harvested each
year?
A: Nearly 100 river otters are turned into the DNR each year.
Q: Will opening a river otter season result in a substantial
increase in the number of otters harvested each year?
A: It is unlikely that there will be an increase in the
number of otters harvested due to the difficulty of targeting the species. Trappers capturing river otters now are
likely to be the same people capturing them during an open season.
Q: Will population dynamics of river otters in Iowa change
if there is a trapping season?
A: With a 400 harvest season quota in the open area, and
with the current population increase of 6-7% annually, the river otter
population in the state will continue to increase slowly.
Q: Will the DNR continue to monitor river otter populations
after the season is implemented?
A: Yes, DNR officials will collect data on reproductive and
population age structure from otter carcasses that are taken during the season
and also from other accidental kills. We will also continue to collect data from the Iowa Bowhunter survey
which provides estimates of population trends annually. We collect and analyze population data to avoid
risk over harvest of otters in Iowa.
Q: Why have river otter populations increased in Iowa?
A: In 1985 restoration of the river otter was
initiated. Through the early 1990’s,
over 325 river otters were released at 25 different sites throughout the
state. Since then, populations have
established, continue to reproduce and spread throughout the state.
Q: Why do we want an otter season?
A: Regulated trapping is good wildlife management and our goal
is to establish sound conservation. We hope that trappers, people concerned
with conservation of wildlife, and those who view otters as a threat to fish
populations can view harvest as a part of sound conservation.
Q: Does the DNR receive complaints concerning river otters?
A: The number of complaints about fish depredation in ponds
due to river otters has increased. There are also concerns about fisheries for catfish, smallmouth bass, and
northern pike in river corridors throughout Iowa.
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Last Update October 20, 2006