2018
DOI: 10.1674/0003-0031-180.1.160
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Survival and Cause-Specific Mortality of River Otters in Southern Illinois

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Cited by 7 publications
(11 citation statements)
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“…We provide insight and recommendations regarding Comstock traps as a live-capture method for river otters. Given a recent focus on river otter conservation, especially in the Midwest where populations have rebounded from historic lows during the 20th century (Nielsen 2016;Rutter et al 2018;Hanrahan et al 2019;Holland et al 2019), we believe that our findings are applicable to those considering alternative methods to live-capture river otters for research purposes.…”
Section: Discussionmentioning
confidence: 78%
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“…We provide insight and recommendations regarding Comstock traps as a live-capture method for river otters. Given a recent focus on river otter conservation, especially in the Midwest where populations have rebounded from historic lows during the 20th century (Nielsen 2016;Rutter et al 2018;Hanrahan et al 2019;Holland et al 2019), we believe that our findings are applicable to those considering alternative methods to live-capture river otters for research purposes.…”
Section: Discussionmentioning
confidence: 78%
“…We measured the functionality of a new design of box trap called a Comstock Custom Cage trap (Comstock Custom Cage LLC, Gansevoort, NY) (hereafter, ''Comstock trap'') to capture river otters for a radio telemetry study (Rutter et al 2018;Hanrahan et al 2019). Comstock traps differ from other cage-type live traps in that they include a suspended wire trigger mechanism rather than a traditional foot treadle and spring-powered doors.…”
Section: Introductionmentioning
confidence: 99%
“…However, we noted several problematic issues that occurred, including contamination of equipment (solved by using backup supplies; we recommend having duplicates of every item that needs to be sterile), and a gust of wind that knocked the tent over during setup (solved by tying down the tent early during future setups when windy). Although intubation of animals under anesthesia is a standard procedure to reduce the risk of regurgitation, we felt the increased handling time and risk of injury from intubation outweighed the benefits, especially as a previous study performed surgeries on 35 river otters in our study area without intubating subjects and with no mortalities during surgery (Rutter et al 2018). Use of a pulse oximeter is also common for any type of chemical immobilization, but we struggled to obtain consistent readings from a paw (the tongue was covered by the mask), so we prioritized a faster processing time over obtaining blood oxygen saturation, which is also consistent with Rutter et al (2018).…”
Section: Discussionmentioning
confidence: 99%
“…Monthly temperatures during November–March 2018–2020 ranged from −17.8°C to 26.1°C and averaged 3.6°C (National Oceanic and Atmospheric Administration 2020). Further description of our study area can be found elsewhere (Rutter et al 2018, Hanrahan et al 2019, Rutter et al 2020).…”
Section: Study Areamentioning
confidence: 99%
“…Wisconsin has a large, stable river otter population but harvest tag availability is limited, and the season can be subject to early closure (Dhuey and Rossler 2018 b , Roberts 2018). River otters are captured incidental to beaver trapping because both species occupy similar habitats, are similar in size, and move through habitat in a similar manner (Swimley et al 1999, Kruuk 2006, Reid 2006, Bieber et al 2018, Rutter et al 2018). Consequently, most river otters harvested by licensed trappers (82%) and incidentally taken by USDA‐WS (85%) during beaver management activities in Wisconsin are caught in body‐grip traps (U.S. Department of Agriculture 2017, Dhuey and Rossler 2018 a ).…”
mentioning
confidence: 99%