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Post by FWS on Dec 6, 2012 11:52:15 GMT -6
Delta releases findings on predator trapping studyBismarckTribune.com December 6, 2012 Delta Waterfowl this week released some results on its on-going study of how predator trapping affects waterfowl nesting success. The study keyed on trap sites in Manitoba and North Dakota. One study area focused on a site in Manitoba that has intense agriculture activity and not much in the way of nesting cover. Delta’s trapping took place on a 16-square-mile area near Minnedosa, Manitoba, and a 25-square-mile block near Shoal Lake, Manitoba. Nest success for 2012 was 34.3 percent and 17.1 percent, respectively. Two control blocks, where no trapping took place, had nest success rates of 0.07 percent and 0.78 percent. In other words, less than one out of every 100 nests successfully hatched in the non-trapped areas. It’s no secret predators like coyotes and skunks take a huge toll on nests not only of ducks, but of upland game species as well. The Delta study is putting numbers to what those losses are. In North Dakota, on two 36-square-mile trapped blocks, nest success was 46.63 percent and 40.69 percent. More than four out of every 10 nests successfully hatched. On two adjacent control blocks, where no trapping took place, nest success was 10.55 percent and 27.54 percent. The break-even point, or the percentage needed to maintain waterfowl populations, is 15 percent to 20 percent. |
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Post by trappincoyotes39 on Dec 6, 2012 17:06:49 GMT -6
Rally H did a few years study in NE SD on pheasant sucess for delta same results it really showed trapping is a big plus when it comes to nesting success from a predation aspect. Still need good habitat and good nesting conditions but predation is something that is improved with intensive trapping at the proper time, No different than Predator control for livestock.
The key is the PROPER time, which isn't durring the fur season mostly. A large harvest of ground nesting predators can have an impact over time, but BIG impacts and sustained results come from the proper timing of the trapping.
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Post by bblwi on Dec 6, 2012 19:15:31 GMT -6
The first Delta studies I reviewed and we had a rep speak at one of our WTA annual meetings the trapping was done during the nesting season. Does anyone know if this was the case for these two studies as well? Their research results were similar but not quite as dramatic as the first sample results listed above.
Bryce
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Post by trappincoyotes39 on Dec 6, 2012 19:32:34 GMT -6
Bryce there was a antleope fawn study done in a few places that showed the impacts of intensive coyote removal and no removal and how that impacted the recruitment of antelope fawns come early fall.
I would assume these studies where done just prior to nesting?
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Post by northof50 on Dec 6, 2012 20:52:25 GMT -6
If you read some of their further publications on data..... things did not look so rosy in the Manitoba study, blaiming wetter weather on nest failure.
It was fine when yotes were 15$ but now they are 100$, each female reduced is 8 less in the fall for trappers to take, and taking out yote let the skunk and coon play predator free. Makes no sence to me in economics
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Post by trappincoyotes39 on Dec 7, 2012 5:51:46 GMT -6
Lower 48 coyotes have little impact on coons. Also your not taking all the coyotes out of a broad area 50. Selective control when it comes to livestock, same as nesting your hitting the predators in close proximity to the nesting habitat.
Again timing of the year and when you do it makes a big differance in overall predator reduction.
The dens takin out in the spring leave a void for more coyotes come fall/winter in the better habitat and can fill in quickly in many areas. Good coyote habitat will attract more coyotes.
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