Deer Management | Buck Manager

The Culling of White-tailed Bucks is Not a Myth

There has been an ongoing debate in deer management over the culling young white-tailed bucks based on antler characteristics ever since the first research on the subject concluded. The subject at the very heart of this debate still remains the harvest of spike antlered bucks. Though many deer managers cull bucks in an attempt to improve the antler quality of their deer herd, does it really work?

DADH: “Conflicting penned deer research findings have fueled the age-old culling controversy. Study results on captive deer have produced recommendations ranging from removing all spike-antlered (presumably genetically inferior) yearlings, to complete protection of all yearling bucks regardless of their antler traits. Those favoring selective removal of small-antlered young bucks claim such a practice will remove small-antlered genes from the herd and improve antler quality.”

Texas has lead the way in terms of antler research. Research conducted by Texas Parks and Wildlife Department suggests that breeding better-antlered white-tailed bucks improved the antler quality of bucks sired, but then researchers at Texas A&M University concluded that a doe’s “nurturing ability” was the most important factor. The latter study suggests that the genetics of individual deer are not important at all?

In an attempt to end the culling debate, researchers from Stephen F. Austin State University set out to determine if a white-tailed buck’s first set of antlers were good predictors of future antler growth. Would yearling bucks in a wild population and varying in antler quality really be significantly different as they aged? To answer this question, wild bucks were captured in South Texas and yearling bucks were permanently marked. This allowed bucks to be tracked from yearling to maturity.

What did they find? Well, at 4 1/2 years old they observed no significant difference in Boone and Crockett antler scores between marked 2, 3, 4, 5, 6, 7, and 8 point yearling bucks. Researchers found that smaller antlered yearling bucks attained a mean antler size equal in width, mass, length and number of points to those starting with larger antlers at yearling age. They were also not significantly different at 5½ years of age and older. Earlier I said that culling works, but this research suggests that removing small-antlered yearling bucks would not improve mature buck antler size. So what gives?

Well, first let’s look at how the yearling bucks were grouped. In the study, yearling bucks were divided into two antler-point categories, those with three or fewer antler points and those with four or more antler points. Although their objectives were to determine if 2 and 3 point bucks were inferior to 4+ point bucks, the implications to deer managers are muddy. If one were to just read through the study it would seem meaningless to cull at all, but it’s not and here’s why.

In my opinion, instead of comparing 2 and 3 point yearling bucks with 4+ point yearling bucks, the data should be re-worked to compare 2 and 3 point yearling bucks with 7 and 8 point yearling bucks. Since most yearlings have either 2, 3, 4, 5, 6, 7, or 8 total points, I think all the mediocre yearlings (4, 5, and 6 points) bring down the average from the top-end deer (7 and 8 points). Since yearling antler points, like everything else, fall along a bell curve, I can only assume that there were many more 4, 5, and 6 point bucks in their sample than 7 and 8 point yearlings. Let’s see the data from 2 and 3 point deer versus only 7 and 8 point yearlings.

Buck Management: Culling bucks is not simply shooting every 2 and 3 point buck we see. If you are even remotely interested in improving the buck segment of a deer herd then I recommend shooting yearling bucks with 4 or fewer antler points. If you have a higher threshold for pain (especially fewer bucks in the short-term), then I suggest shooting yearling bucks with 5 or fewer antler points. This may sound insane at first, but because top-end bucks make up only 20% or less of the buck herd, the competition has to be removed! By doing this, a land owner can ensure that all future deer (bucks and does) are sired by the best bucks. If you are going to make drastic genetic changes within a population, it takes drastic action. Ranchers do not put a crappy bull, a mediocre bull, and a good bull in with their cows and hope all the calves end up being grand champions.

Buck management is not a one-size-fits-all for every ranch. Culling must occur at the yearling level as well as each age class thereafter. Bucks at each age must be compared on a relative basis to other bucks in the age class and inferior bucks should be harvested. As a property progresses in a deer management program the quality of cull, management, and trophy bucks should increase if the age, genetics, and nutrition are in place. And remember this, if genetics were not heritable why would deer breeders (whether you like them or not) consistently produce monster buck after monster buck. I think there is something to it!

Deer Not Eating Protein Pellets?

Genetics (genes) are the most important factor in determining antler characteristics in whitetail bucks. However, genes are not the only factors that determines a buck’s antler potential. Both age and nutritioninfluence how a deer’s genes are expressed. For example, even a buck with the genetic composition to grow the largest rack in the world was harvested at a young age or was malnourished, then the genes that the buck carried were never fully observed. Because age and nutrition determine how a buck’s genes are expressed, these factors are critical to the success of a sound deer management program that strives to produce high-quality bucks.

Although proper buck harvest is necessary to promote age and antler characteristics, nutrition can be achieved through a combination of habitat management and supplemental feeding. Habitat management is the single best way to provide year-round, high-quality food for deer, but this is typically only a viable option for land owners. Habitat management is not always feasible for hunters that lease land for deer hunting for a variety of reasons. In this case, hunters are limited to providing supplemental food through either food plots or free-choice protein pellets. Continue reading “Deer Not Eating Protein Pellets?”

Monster Illinois Buck Found Dead

Big Buck Down in Illinois

Every deer hunter loves a monster buck story, so here is a new one about a big buck found dead in Illinois. Like the world record non-typical white-tailed deer that was found dead in Missouri, two quail hunters found this big non-typical buck dead, but on a property near Petersburg, Illinois. I can imagine there is still quite a bit of heartache within the hunters in this area.

I mean, how would you feel if you caught a glimpse of this big Illinois whitetail while hunting? Or worse, had a picture of this giant buck at your stand while you were at work? Ouch!

Quail Hunters Find BIG Buck!

The hunters that found the big, dead buck had permission to hunt quail following deer hunting season. I think they jumped a few coveys, but the most notable thing they brought home was the head and antlers of this massive buck which unofficially scored 246 Boone and Crockett inches. Now, that is something to write home about!

The white-tailed buck was apparently caught on camera by a hunter’s game camera, but the deer apparently eluded hunters for yet another Illinois deer season. I do not know how old this big deer was, but preliminary reports state that no wounds were found on the deer, although coyotes had eaten on the carcass. An impressive buck, no doubt.

An Illinois Monster

Buck Management: What’s Up with Missing Brow Tines?

The hunting season has just ended for the majority of white-tailed deer hunters. Now, it’s time to reflect, look back over the past season while it’s all fresh in your mind. If you had the opportunity to spend many days in the field hunting, then you should have a good picture of the overall deer herd using the property you hunt.

Better yet, if you recorded deer observations while hunting, then you have the hard data to support what is happening under your property’s current deer management program. These field observations, in addition to game camera photos, will allow a deer manager to track individual bucks from one year to the next. I strongly recommend keeping both photo and stand observations since some bucks always seem to avoid getting caught on camera.

Are missing brow tines caused by genetics?

Missing Brow Tines

With regards to antlered deer, one issue that always seems to arise is the lack of brow tines (G1) on some whitetail bucks. Hunters have often questioned why some middle-aged and mature bucks simply lack brow tines. Is something going on in the deer herd?

Well, yes. Antler characteristics are genetically linked and highly heritable This means a young buck will likely look a whole lot like his daddy. To back up this claim, I will cite some long-term data collected from Kerr Wildlife Management Area (WMA), located in Texas.

From 1974 to 1997, the research facility at the Kerr WMA was involved in a number of studies designed to determine the role of nutrition and genetics in white-tailed deer antler development. During each of various studies that took place over that time, researchers recorded antler information for individual whitetail bucks throughout a 23 year period.

Deer Hunting and Management

Brow Tines on a Buck?

This wealth of antler data allowed wildlife biologists to back-test 217 whitetail bucks from yearlings (1 1/2) to 3 1/2 years of age and 168 bucks until they were 4 1/2 years old. That’s a lot of deer, and from what I can find, represents one of the largest sets of antler data available. So what did they find?

In short, data from 385 bucks found that 90 percent of the bucks without brow tines at 3 1/2 and 4 1/2 years of age were spikes at 1 1/2 years old! All bucks without brow tines at 1 1/2 years old lacked brow tines at 4 1/2 years old. On the other hand, all bucks with 5 or more points as yearlings had both brow tines at maturity. Bucks that had both brow tines as yearlings had both brow tines at 3 1/2 and 4 1/2 years of age.

Missing Brow Tines Starts with Spike Bucks

Incredible Antler Data

The numbers above speak for themselves. In addition, deer researchers know that antler characteristics in white-tailed deer are highly heritable, so the probability of passing on genes for specific antler characteristics (larger or smaller antlers) is a given. The future of the deer herd on a property depends a good amount on the quality of the bucks doing the breeding.

To sum up, a whitetail buck that has spikes as his first set of antlers has a 90 percent chance of developing into a buck with missing brow tines later in life. A buck that has 5 or more points as his first set of antlers is much more likely to have brow tines later in life, at least according to this data set out of Texas.

Deer Management Implications

How does knowing this information affect you and the deer you manage moving forward? It likely depends on the goals you have for the deer that use your property. If one of the goals is to harvest the maximum number of mature bucks on the property annually then you want to allow all bucks to reach maturity.

However, if you are looking to improve buck antler quality, then at least one of the factors you should consider is the quality of the young bucks on your land. Antlers are the result of genetics, but they are also influenced by the environment. Nutrition plays a role in how genes are expressed, how a buck looks.

This phenomenon can be seen is deer herds with suboptimal nutrition as spike bucks tend to comprise a higher percentage of the young bucks, those 1 1/2 years of age with their very first set of hardened antlers. In these types of situations, increasing the available food by reducing the size of the total deer herd or the addition of supplemental foods/forages may be an appropriate step to increase overall deer health, buck quality.

If a property provides ample food and a manager is seeing a high percentage of 1 1/2 year old bucks without brow tines on the property, then you now know it’s all in the genes. The only way to improve antler quality and reverse missing brow tines in older bucks is to put pressure on spikes and bucks without brow tines, regardless of age.

Deer Management for Brow Tines, Better Antlers

In this situation, deer management practices should also include rolling over the doe herd to reduce the number of old does sired by bucks lacking brow tines. This is not a management strategy that plays out overnight, but a practice that must be integrated into the long-term management of a deer herd using a property.

Two Big Whitetails Lock Up and Drowned

As hunters, we hate to see dead deer that are not hunter-killed. This includes deer hit by cars, deer hung in fences by their hind legs, and locked bucks. To non-hunters, it probably does not make sense — because each fall hunters harvest hundreds of thousands of white-tailed deer across the US. The big difference is that most hunters have a good understanding of how wildlife management, specifically deer management, really works and why it is necessary. But there’s much more lost than just hunter satisfaction.

Hunters and non-hunters that see the photos of these two dead bucks will consider it a bad thing. However, deer hunters realize that not only has some excellent table fare been lost, but the satisfaction of two successful harvests has vanished, as well. But nature can be cruel — and a bit ironic. Was each of these bucks fighting for the right to pass on their genes, or simply to prevent the other from passing on his? If it was the former, they both lose. If it’s the latter, they both, unfortunately, win.

These two whitetail bucks were found dead on a ranch near Tilden, Texas. They apparently drowned in a stock tank after getting locked together in a fight that really was a brawl for it all. From the photos, the bucks do not appear to be severely locked, but it only takes about 10 seconds to drown. The larger buck scored 166 Boone and Crockett inches and the 12 point buck went 154. Two good bucks, some happy hunters, hamburger meat and a lot of sausage lost.