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#3180825 - 03/01/13 09:51 PM Re: 5 or 6? [Re: redblood]
catman529
spiderboy
16 Point


Registered: 11/10/10
Posts: 16278
Loc: Franklin TN

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 Originally Posted By: redblood
aging deer by tooth wear is a noble concept, that is plaqued by overwhelming flaws. The most prominent being the fact that no one can ever check their answers, including the person who taught u and the one who taught him.
with all the trail cam pics and penned deer with ear tags, you would think there would be enough to know what a deer's teeth should look like at a certain age. Then consider what the deer eats and the effect it might have...
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#3180852 - 03/01/13 10:30 PM Re: 5 or 6? [Re: catman529]
redblood
16 Point


Registered: 01/22/06
Posts: 14591
Loc: Lewisburg

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 Originally Posted By: catman529
 Originally Posted By: redblood
aging deer by tooth wear is a noble concept, that is plaqued by overwhelming flaws. The most prominent being the fact that no one can ever check their answers, including the person who taught u and the one who taught him.
with all the trail cam pics and penned deer with ear tags, you would think there would be enough to know what a deer's teeth should look like at a certain age. Then consider what the deer eats and the effect it might have...



True as that may be, it is like aging cattle and horses by the same measure, virtualy impsooible to nail down exact ages- better at indicating age brackets. i participated in a project in college that involved aging a set group of purebred cattle (by tooth wear/loss). we used all the perimeters taught in class and in the the example from the text books/field guides. we aged approx 50 females (purebred angus, purebred herefords and a few registered f1 crosses. i was an undergrad student at the time, but we had an equal amount of grad students doing the same. even one of the newer associate professors participated in the project. we all aged these animals to our best ability graced with as much data as we could lay our mitts on. when our estimates were compared with the exact birthdates of the animals in question (from registration papers that correlateed with ear tatoos of each individual). These were all older age class cattle 6-14 yrs for the most part, btw. The student whose estimates were the closest was a sophomore girl who was a ag business major who had no farm background- on average she was 2 yrs off in her estimates based on examination of all the animals in test samples, comparing her guesses with actual birthdates. I faired much worse, but not as bad as the associate professor.in one particular animal, i was 6 yrs off- and i raised purebred and commercial cattle my entire young life. the lesson taken from this exercise, as conveyed by the professor, was that aging by teeth is not meant to be a science but rather an art of ball park estimation. Too many variables from animal to animal, plus differences in diet and maloclussion (sp) lead to different amounts of tooth wear/loss. Perhaps the biggest variable in reproductive females, is calcium loss during pregnancy which can lead to premature tooth damage. As tough as it is to measure in domestic livestock, it is much much more difficult to measure in free roaming deer. so i think it is important to realize that even the most "seasoned" expert is taking his best guess based on instruction from mentors who taught him- while taking HIS best guess.
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#3180889 - 03/01/13 11:44 PM Re: 5 or 6? [Re: redblood]
catman529
spiderboy
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Registered: 11/10/10
Posts: 16278
Loc: Franklin TN

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very interesting info. I never said it was a science... it's always just a guess once you get to 2.5 or older. Did you all do any studies on actual deer jaws? because they surely wouldn't be exactly the same as cattle would they?
_________________________
Haven't been this excited about deer season

...since last deer season

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#3180892 - 03/01/13 11:50 PM Re: 5 or 6? [Re: catman529]
redblood
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Registered: 01/22/06
Posts: 14591
Loc: Lewisburg

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 Originally Posted By: catman529
very interesting info. I never said it was a science... it's always just a guess once you get to 2.5 or older. Did you all do any studies on actual deer jaws? because they surely wouldn't be exactly the same as cattle would they?



never deer. just cattle for me and their were similar studies for goats and sheep referenced that indicated the same discreptancies as the one i mentioned, but i do not have specifics on those.
_________________________
"I will predator hunt for food "

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#3180895 - 03/01/13 11:54 PM Re: 5 or 6? [Re: redblood]
catman529
spiderboy
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Registered: 11/10/10
Posts: 16278
Loc: Franklin TN

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wish I could see a good variety of pen raised deer jaws with known ages on all of them, and get a better idea for myself how much variance there can be in one herd of deer. I have 10 jawbones on the shelf behind me, some killed and some picked up, just for studying and better learning the "art" of aging deer teeth...
_________________________
Haven't been this excited about deer season

...since last deer season

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#3180912 - 03/02/13 12:23 AM Re: 5 or 6? [Re: redblood]
Outdoor life
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Registered: 12/19/12
Posts: 891
Loc: Jackson Co. TN

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After looking at the link you sent me, I'm gonna say 5.5, because the 4th tooth is not completely smooth, but I'm just learning.
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#3181204 - 03/02/13 01:05 PM Re: 5 or 6? [Re: Outdoor life]
redblood
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Registered: 01/22/06
Posts: 14591
Loc: Lewisburg

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she was definitely older age class
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