Muskrat - Association of Fish and Wildlife Agencies

Figure MK7a. Unmodified jaw coilspringtrap (open)Unmodified Jaws (Figures MK7a and MK7b)Average Mechanical Description and AttributesInside jaw spread (at dog): 3 11 / 16 inchesInner width: 3 3 / 16 inchesInside width at jaw hinge posts: 3 1 / 2 inchesJaw width: 3 / 8 inch smooth round jawJaw thickness: 1 / 8 inchMain trap springs: Two 0.113 inch diameter wire coil-springsBase plate: Not reinforcedPan stop: YesAny trap that has similar specifications may be considered a BMP trap regardlessof brand or source of modification, although performance information on all otherBMP criteria (see Introduction: “Criteria for Evaluation of Trapping Devices” pages 4-6)needs to be considered as well. The trap tested was the Woodstream Victor No. 1coil-spring.Figure MK7b. Unmodified jaw doublelongspringtrap (open)Additional Information• For use in submersion sets only.• Chain attachment used in trap testing: six inch center-mounted with two swivels, onein-line shock spring, and anchored with a stake. When using submersion sets, chainlength should be short enough to prevent captured animals from resurfacing.• Selectivity features: Brass pan tension machine screw; pan tension was loosened so thatthe pan moved freely, and was checked and readjusted as needed after every capture.• Special considerations for practicality: This device also meets BMP criteria for raccoonsin the southeastern United States, and mink and nutria in submersion sets.Average Mechanical Description and AttributesInside jaw spread (at dog): 3 7 / 8 inchesInner width: 3 1 / 8 inchesInside width at jaw hinge posts: 3 7 / 16 inchesJaw width: 1 / 2 inchJaw thickness: 1 / 8 inchLength of main trap springs: 4 3 / 8 inchesThickness of main trap springs: 1 / 16 inchWidth of main trap springs: 1 1 / 2 inches narrowing to5/ 8 inchBase plate: Not reinforcedPan stop: YesAny trap that has similar specifications may be considered a BMP trap regardlessof brand or source of modification, although performance information on all otherBMP criteria (see Introduction: “Criteria for Evaluation of Trapping Devices” pages 4-6)needs to be considered as well. The trap tested was the Sleepy Creek No. 11double-longspring trap.MUSKRAT 6Association of Fish and Wildlife Agencies