Coyote expert discusses why killing yotes is the last thing we want to do

[JABIII]

Very interesting discussion at the first of this long podcast, including South Carolina and Georgia specifically...

[turbo]

Without watching it, are you referring to the natural hierarchy disruption when kills are made?

[uga_dawg]

Without watching it, are you referring to the natural hierarchy disruption when kills are made?

Just watched the first 10 minutes. But basically he is saying that the more coyotes we kill the more pups the females have.

I remember people making this argument 10 years ago in Georgia. It goes against what you would think, but he didn't waver in his prediction. He said that the bounty program that Ga has started will result in more coyotes at the end of the bounty than they will have at the beginning. He makes some good points about the western states and how they have been trying to get rid of them for 100 years and we should learn from their results.

It was also interesting to me that coyotes are in 49 states. All of them except Hawaii.

[JJ1965]

It was also interesting to me that coyotes are in 49 states. All of them except Hawaii.

Hawaii Department of Land and Natural Resources will probably import some soon as an environmental diversity experiment.

[Bigtimber2]

If there is a fox pen someone will release them in Hawaii.

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[PBiz]

Big fox pen in Columbia called the SCDNR released coyotes... Read a book..

[Bigtimber2]

That is gold, thanks.



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[Rubberhead*]

A dead coyote hen don't lay eggs...

[Duckman#1]

Just watched the first 10 minutes. But basically he is saying that the more coyotes we kill the more pups the females have.

Kinda like deer. Start bringing you doe numbers down and your twin fawn rate goes up.

[Duckman#1]

One thing we have working for us is heart worms. Took one that I trapped last week to my vet and he estimated age at 1-2 years old and was eat up with heart worms

[PBiz]

I wonder if they can change sex like the Raptors on Jurassic Park..

[Sportin' Woodies]

Or Bruce jenner

[Mergie Master]

Government coyote hunters out west figured that out years ago when they were using poison. When they managed to lower the coyote population the number of litters and litter sizes along with puppy mortality increased dramatically to fill the void. I'll still shoot everyone of them I see.

DEMOGRAPHIC AND SPATIAL RESPONSES OF COYOTES TO CHANGES IN FOOD AND EXPLOITATION

ERIC M. GESE, USDA, APHIS, Wildlife Services, National Wildlife Research Center, Logan, UT, USA

We documented the demographic and spatial responses of coyotes to changes in the levels of food resources and human exploitation on the Piñon Canyon Maneuver Site, southeastern Colorado. We captured, radio-collared, and tracked 92 (53 M: 39 F) coyotes from March 1983 to April 1989. Of these, 74 animals were residents from 32 packs, plus 12 transients; 6 animals were captured while making dispersal movements. We collected 14,147 telemetry locations of the radioed coyotes spanning 7 years of study. We compared coyote pack size and density, survival rates, reproduction (litter size, litter sex ratio, % yearlings reproducing), and home range size between years receiving exploitation (1987-88) versus years receiving no exploitation (1983-86) and post-removal (1989), as well as, comparisons of these parameters between removal and non-removal areas within years. Changes in estimates of pack size and coyote density, plus the number of animals removed, indicated the coyote population was reduced 44-61% and 51-75% in the removal area during 1987 and 1988, respectively. As expected, annual survival rates declined significantly for coyotes in the removal area compared to coyotes in the non-removal area. Removals brought about a drastic reduction in pack size and a corresponding decrease in density. However, both pack size and density rebounded to pre-removal levels within 8 months post-removal. Home range size did not change in response to changes in exploitation. Coyotes in the removal area appeared to maintain their normal (i.e., pre-removal) home ranges after coyotes were removed from neighboring territories.

(More at link above)

[uga_dawg]

A dead coyote hen don't lay eggs...

That thought crossed my mind as well. In particular they said that their howling and calling at night was like a roll call for them and as the calls dropped, the litter sizes went up. So ideally you want a bunch of vocal males around your place.

That or a group of spayed coyotes on your place. Paging Glenn. I need an appointment this afternoon. I'll drop her off in a kennel at the front door. You can take it from there.

[Tigerbdog]

This podcast is fascinating. I started listening to it last night and have about 35 minutes left. I learned a lot about critters that used to and continue to roam North America. I would highly suggest listening to this if you like to learn.

[M2Field]

I trapped and killed a good number of coyotes off a property over a three year period. A lot of females. They have not come back yet.

[JBtflo]

Government coyote hunters out west figured that out years ago when they were using poison. When they managed to lower the coyote population the number of litters and litter sizes along with puppy mortality increased dramatically to fill the void. I'll still shoot everyone of them I see.

DEMOGRAPHIC AND SPATIAL RESPONSES OF COYOTES TO CHANGES IN FOOD AND EXPLOITATION

ERIC M. GESE, USDA, APHIS, Wildlife Services, National Wildlife Research Center, Logan, UT, USA

We documented the demographic and spatial responses of coyotes to changes in the levels of food resources and human exploitation on the Piñon Canyon Maneuver Site, southeastern Colorado. We captured, radio-collared, and tracked 92 (53 M: 39 F) coyotes from March 1983 to April 1989. Of these, 74 animals were residents from 32 packs, plus 12 transients; 6 animals were captured while making dispersal movements. We collected 14,147 telemetry locations of the radioed coyotes spanning 7 years of study. We compared coyote pack size and density, survival rates, reproduction (litter size, litter sex ratio, % yearlings reproducing), and home range size between years receiving exploitation (1987-88) versus years receiving no exploitation (1983-86) and post-removal (1989), as well as, comparisons of these parameters between removal and non-removal areas within years. Changes in estimates of pack size and coyote density, plus the number of animals removed, indicated the coyote population was reduced 44-61% and 51-75% in the removal area during 1987 and 1988, respectively. As expected, annual survival rates declined significantly for coyotes in the removal area compared to coyotes in the non-removal area. Removals brought about a drastic reduction in pack size and a corresponding decrease in density. However, both pack size and density rebounded to pre-removal levels within 8 months post-removal. Home range size did not change in response to changes in exploitation. Coyotes in the removal area appeared to maintain their normal (i.e., pre-removal) home ranges after coyotes were removed from neighboring territories.

(More at link above)

It appears that that study did intensive removal, increased prey base and allowed the remaining animals to achieve their reporductive potential supposedly due to increased food availabilty. They did not keep the "heat on" so to speak and it still took a couple years for the reproductive response to take place (maybe juveniles and subadults maturing along with more food). If you keep the petal to the metal it is likely that younger animals with plenty of resources do not live long enough to make the leap to doubling their litter sizes to those of adults. Also, in the Southeast, it may be that resources as less limiting than out west so they could be closer to their reproductive potential in many places.

The end results was not more coyotes, just replacing what you used to have. Nature does that all the time.


"As predicted, following population reduction, coyote pack size and density both declined substantially. Removals were effective in reducing pack size and consequently resident population density by as much as 60-70%. With this reduction in density, vacancies apparently were found and filled quickly by transient and dispersing coyotes so that within 8 months the density within the removal area had recovered.

"This level of population reduction appeared to be sustainable for 2 years. Removals exceeding this level or lasting longer would likely cause a more prolonged decline in overall coyote density. "

Populations at high density and reproductive output due to high food availability would not be capable of similar demographic responses as they would already be at or near upper limits. Also, our control lasted for 2 years only. Prolonged control actions could have more lasting impacts on coyote population size, persistence, and recovery.

[HARV]

Up here mange will wipe out a wack of them every few years as lots then freeze in the winter. A buddy 1 road over hunts'm in both our concessions he got 38 2 years back.was kinda quite at night for a bit but they are back singing with a vengeance. We are covered up in yotes again.

[Strick9]

Gotta love a study that says we trapped them down hard but they came back. Really? Get on them, stay on them period.

[GMAC]

Get on em all you want. You'll never slow them down. Folks have been shooting, trapping, poisoning them since 1492 and accomplished exactly nothing.