Deer Management | Buck Manager

Managing White-tailed Bucks by Age Class

Selective harvest is an important part of white-tailed deer management. This is equally true for both the buck and doe segments of a deer population, but many hunters become obsessed with trying to determine which bucks to shoot or not shoot. Buck harvest is part of the equation, but how should the deer on your property be managed, hunted?

For regular visitors to this site, you know that I have covered shooting deer and harvest management in the past, but this time I really want to stress the importance of not stressing out over the harvest aspect of a deer management program. Selective harvest is not something that can be perfectly implemented on a property, but rather a strategy to remove less desirable animals in an attempt improve the deer herd, whether that simply be nutritionally or possibly even genetically.

Whitetail Buck Management

The most controversial issue on any hunting property typically involves around what is and is not a cull or management buck. There is no stock answer to this debate because the quality of a cull buck will vary from property to another. It could be said that one deer hunter’s “trash” is another hunters treasure.

We have all seen bucks with obviously inferior antlers that have been shot as culls, but I bet you have also seen some really good looking bucks on the web, in magazines, and on television that were harvested by someone and referred to as cull deer. So what’s the deal?

Managing Bucks by Age

I mentioned earlier that the quality of “cull deer” will vary from property to property, but the most important consideration to keep in mind when thinking about cull deer is that the quality of bucks will vary within each age class (cohort) on a particular property.

Grade bucks of the same age on a comparative basis and the manager/hunter will be comparing apples to apples. This is the easiest way to determine what may or may not be a cull buck on a piece of property — bucks of the same age must be judged head-to-head against one another to determine which has desired (or at least more desired) antler characteristics and which one will end up in the sausage. Hey, we all gotta eat!

An Example of Whitetail Buck Management

Believe it or not, there are some properties under intensive deer management that consider a yearling (1 1/2 years old) buck with 5 or less antler points a cull buck. This does not mean every property owner or guy trying to manage his deer hunting lease should hammer every deer with less than 5 points.

It would be grossly oversimplified (and a bad idea) to say everyone should do the same thing on their hunting property. This just would not be the case. There are just too many variables for a one-size-fits-all deer management approach for every property.

Spike Buck Management

Let’s discuss spike bucks for a minute. Now, this is a can of worms that hunters and even researchers have been actively discussing for decades, so I am not going to try to change anyone’s thoughts on the subject in this article. But, using the spike buck as an example, I just want to throw out an example of culling bucks by age class.

Let’s first assume that we need to harvest some number of bucks and that I am trying to improve the overall end-quality of bucks on a property. If two yearling spikes walk out and one has 3 inch antlers and the other has 10 inch antlers, I will shoot the one with shorter tines and leave the better buck of the same age every time. Why?

Because my goal when culling is to remove the most undesirable bucks. The 10 inch spike grew over 3 times as much antler as his same-aged friend.

Selective Harvest for Better, Mature Bucks

Although selective genetic manipulation through buck harvest is an important component of any whitetail deer management program, it is not the only component. Keep in mind that better deer habitat means better bucks at every age class. Overall, providing quality deer habitat is the best type of whitetail buck management.

A key to producing good deer on your hunting property may be to remove the very low-end bucks and then allow the rest to get some age on them. This strategy is best applied in areas where deer are at or have exceeded the carrying capacity of the property. If the deer density is low, below the carrying capacity, then it probably does not make sense to cull bucks since there are not many deer to spare. In this case, you will likely want to let each and every buck walk in hopes that it can grow older and eventually become a target for harvest.

The final key to buck management is to manage harvest. Harvest mature bucks and then cull by age class (if warranted) so that you remove no more than 20% of the total number of bucks in the area each year, and then provide the best deer habitat that you can so that all deer on your property remain healthy and bucks reach their full genetic potential.

New Non-typical Whitetail Deer Record

Back in mid-August of this year I wrote an article that touched on conducting deer surveys and how the abundant rainfall received during 2010 really set up most of Texas up for a great year of white-tailed deer hunting. I had a feeling that a lot of the bucks carried over from last year would be looking good this fall.

That said, really was not expecting a new Texas non-typical white-tailed deer record to be harvested on the first day of the 2010 deer hunting season! By the way, I’m talking about over 300 inches of native buck antler. That’s awesome!

Texas Nontypical Record Buck

You may recall that hunter Marko Barrett harvested a big South Texas buck on the Las Raices Ranch back in 2007. That non-typical deer was a brute in his own right with 34 points that measured out at an impressive 275 7/8 inches.

Well, it looks like his father, Mark Barrett, has raised the bar even higher with his own giant, non-typical whitetail buck. And right from his Facebook page, Marko wrote:

“We’ve been keeping this one pretty tight to the vest, but now that he is down we can share these pictures. He is potentially, by our score, the largest native Texas deer EVER! Rough score in velvet of 311 4/8. Congratulations, Mark Barrett (aka Dad)!”

Managing for Better Habitat, Bigger Deer

The Las Raices has been actively involved in whitetail deer management for many years, so producing high-quality whitetail bucks is nothing new for this family-owned property. With the Las Raices’ commitment to on-going deer population and habitat management, it’s starting to look like they could be their only competition for producing record-breaking native deer into the future.

But what am I saying? Big bucks are produced all across Texas every year.

“The buck’s score is reported as 311 4/8” green gross, in full velvet. This score is not official, but is almost certain to replace the current state record. In Encinal’s own words, “Las Raices is a family owned and operated hunting ranch in Webb County, Texas that has exclusively non-manipulated nor transported native genetics.

This is a 100% native pasture deer that has not been manipulated in any way. Just rain, protein feed and patience…'”

One for the Record Book

Congratulations are in order for Mark Barrett and the Las Raices Ranch for bettering their very own state white-tailed deer record. I don’t think every property can produce a 300+ inch non-typical whitetail buck because, let’s face it, this buck is several standard deviations away from average.

But hey, it does show that anyone can exceed their deer management expectations by managing for good habitat and allowing those buck to get some age on them. And then hoping for a little rain, too!

Stand Counts for Surveying White-tailed Deer

From the looks of things, Spring has definitely sprung here in Central Texas! Browse plants are putting on new leafy growth and the moisture-rich soil is covered with high-protein forbs. It appears the white-tailed deer found in this part of the world be eating good for some time to come. Let’s just hope the all-important Spring rains come through for the deer habitat this year. So far, so good. Changing subjects now, and I know it’s a long time until deer survey season, but I recently learned of an interesting study taking place out of Texas State University. The research relates to conducting stand surveys to estimate white-tailed deer populations on individual ranches.

First, I’ve never been a huge fan of stand surveys for whitetail, primarily because I feel other deer survey techniques do a better job of estimating deer populations on individual properties. That being said, some properties just do not lend themselves to being surveyed any other way, so even a low-confidence estimate is better than no estimate at all. In the mentioned study, a high-fenced pasture with a known number of marked white-tailed deer was used. Five deer stands and 5 timed spin-feeders filled with corn were placed within the pasture and were located approximately 1/2 mile from one another, creating a hunting scenario similar to many Texas ranches where deer are hunted. Continue reading “Stand Counts for Surveying White-tailed Deer”

White-tailed Deer Warts

A deer hunter never expects to see giant warts or tumor-like growths on a white-tailed deer, but they do occur. Over the years I’ve seen many of photos of both live and harvested deer with “tumors,” although I’ve never seen one while in the field. The technical term for these growths is cutaneous fibroma and it’s caused by a virus. From a deer management perspective, there is not much you can do to keep wild deer from getting fibroma.

What are External Deer Tumors?

First, they are not tumors at all — they’re warts. Cutaneous fibromas are caused by a naturally occurring virus of the deer’s skin. The virus that causes these unsightly warts in deer is believed to be transmitted through biting insects and/or direct contact with damaged skin. Once the virus enters the skin, warts begin to form.

As the warts increase in size, the skin surrounding them is typically hairless and grayish in color. The number of warts on an infected animal can vary from one to several hundred, they can sometimes clump, and can in some cases end up covering much of the deer’s body.

Do Warts Bother Deer?

For the most part, these warts will not cause a white-tailed deer any major problems. However, sometimes the growth of the wart can indirectly cause problems by restricting the consumption of food or the deer’s breathing depending on where the growths are located.

Although death from fibromas in deer can occur, death from warts is not always imminent it seems. There have been many hunter testimonials of white-tailed deer with warts “shaking them off,” so to speak. In those cases, where they really the same deer? I can’t say for sure. I could see a situation where a deer with an isolated wart could recover, so to speak.

Deer Warts, Deer Hunting

From a deer hunter’s perspective warts are quite unsightly. Since fibromasts are a virus of the skin, they will be removed if the deer is skinned. Notice I said IF the deer is skinned. Although the meat of a deer is typically not affected, most hunters that harvest a deer with a large number of warts are hesitant to put the meat in the freezer.

This is understandable and probably the safest thing to do. Some research reported that a buck with external warts also had internal and cancerous fibromasts. Again, if an animal does not appear healthy then use your own, conservative discretion.

The take home message on warts is that they do occur naturally in white-tailed deer across their range. Fibromasts can occur on any deer, healthy or otherwise. With that said, these warts occur rather rarely and there is nothing that can be done from a deer management standpoint to manage against them. Deer are the only host for the virus, so fear not for yourself should you find yourself standing over an infected, wart-covered animal.

Factors that Influence Deer Harvest Rates

When it comes to white-tailed deer management—at any scale—the most important factors are deer density and buck to doe ratio. These two numbers are usually indicative of habitat condition and the reproductive potential of the deer herd. Most hunters continue to talk about buck harvest criteria, and although important, they fail to have a good handle on the deer density and buck to doe ratio in their hunting area! In addition, many landowners overlook habitat conditions and factors that limit fawn production and survival.

White-tailed deer harvest rates are important because they determine not only the number of animals you will shoot this year, but more importantly the number of deer that will survive into next year. This is especially important for the doe population because these animals, depending on deer density and sex ratio, can increase the total deer population prior to the next hunting season by 50% or more. This article discusses population and environmental factors that influence white-tailed deer harvest rates on an annual basis.

Harvest rates can vary annually by habitat quantity, habitat quality, fawn production, and white-tailed deer management objectives. Hunters and landowners looking to maintain healthy age structure in bucks should never harvest over 20% of the buck herd. This holds true whether the buck to doe ratio is 1:10 or 1:1. Of course, if the deer density in the area is held constant, many more bucks can be harvested when there is 1 buck for every 1 doe compared to when there is 1 buck for every 10 does. Many hunters fail to realize that from a population standpoint the types of the bucks being shot is less important as the total number of bucks being removed from the herd. In short, limit buck harvest to less than 20% of the buck population.

Doe harvest management is more important in determining the overall dynamics of a white-tailed deer population in a given area. The doe population determines if a deer population declines, remains stable, or grows. However, the doe population is dependent on, as mentioned prior, habitat quantity, habitat quality, fawn production, and management objectives. Because the doe population in an area depends on these annual factors, so does the annual harvest rates.

Habitat Quantity

This is a measure of the total amount of deer habitat available. Does your property have 100 acres of deer habitat or 1,000 acres of deer habitat? Obviously, more deer habitat correlates with a larger population size. Hunters on 100 acres of habitat can not expect to harvest as many deer as hunters on 1,000 acres of habitat, assuming the deer density in that habitat is the same. If both ranches have the same harvest strategy in place, then the 1,000 acres of habitat can harvest 10 times the number of animals. It’s not because those hunters are greedy, it is just that the total deer harvest for a property should be related to available deer habitat, not just property size. In this example, both ranches could have been 1,000 acres in size. We only discussed available deer habitat on those properties. Property size will not effect the harvest rate, only the total number of animals harvested (because of available habitat).

Habitat Quality

Habitat quality is measured by an area’s ability to provide food, cover, water, and space for white-tailed deer. Deer found on high quality habitat have higher reproductive rates than deer found on low quality habitat. Here is an example of how habitat quality impacts harvest rate: Let’s say that there are two ranches 1,000 acres in size. One provides high quality habitat and the other provides low quality habitat. If we assume that the deer density is the same, then fawn production on the high quality habitat will be higher because there is more food per animal. This high quality habitat means more food per doe, a higher reproductive rate, a higher fawn survival rate, and more bucks and does available for harvest each year. In short, properties with high quality habitat must harvest does at a higher rate to keep the deer population stable.

In Summary

Without a doubt, both habitat quantity and quality impact the annual harvest rates of a deer population. Property size does not impact harvest rate, but smaller properties will harvest fewer animals than larger properties based simply on habitat quantity and differences in the sizes of the deer populations. Habitat quality can vary by property depending on habitat management practices (or lack thereof) and deer found on high quality habitat have higher reproductive success. Because of this habitat effect, properties providing high quality habitat must harvest does at higher rates than properties providing low quality deer habitat. Next week, I will discuss how fawn survival, density, and buck to doe ratio also impact white-tailed deer harvest rates.