How Antler Point Rules Altered Buck Harvests in Pennsylvania and Mississippi

The studies we reviewed from both states showed a consistent result from an antler point restriction (APR): yearlings accounted for less of the buck kill. Among Pennsylvania yearlings wearing radio collars, survival reached 64%; previously, fewer than 20% survived. In Mississippi, the yearling share dropped from 47% to 18%. Mississippi researchers also recorded fewer harvested bucks and smaller antler scores on public hunting ground after the restriction took effect. The overall take dropped from 3.1 bucks to 1.8 bucks per 1,000 acres. The harvest of bucks aged 2.5 and older showed just a small increase, while gross scores generally fell among same-age bucks across six areas. The extension publication cautions that it cannot establish whether the restriction caused those antler losses.

Until 2002, Pennsylvania hunters could legally take a buck bearing 2 points on either antler or a spike measuring at least 3 inches. During 2002 through 2010, the minimum was either 3 points or 4 points on either antler, according to location. Beginning in 2011, the former 4-point region required 3 points with the brow tine excluded. A study spanning multiple years paired the state wildlife agency with the U.S. Geological Survey's Pennsylvania Cooperative Fish and Wildlife Research Unit at Penn State. Researchers captured more than 2,000 deer and surveyed a group exceeding 8,000 hunters.

Before the restriction, hunters killed about 80% of bucks annually, with yearlings making up most of that take. Tracking hundreds of bucks fitted with radio collars showed that yearling survival increased from below 20% to a rate of 64%. Among adults, survival reached 36%. Previously, yearlings accounted for about 80% of antlered deer harvested and adults for 20%; afterward, those shares were about 55% and 45%, respectively.

A larger adult share does not necessarily translate into large bucks. Roughly 75% of harvested adults are just 2.5 years of age. According to the agency, hunters still take most Pennsylvania bucks before their antlers reach maximum size. Its page also describes hunter success as changing little across three decades and hunter backing as steady. Breeding records from more than 2,500 females put the mean conception date at November 17 before restrictions and November 16 afterward. The page adds that adult buck harvest increased during a decline in the overall deer population. Improved survival and a shrinking herd therefore occurred over the same stretch.

In 1995, Mississippi adopted a statewide four-point minimum, requiring a buck to have at least four antler points in total. According to the state's university extension publication, yearlings accounted for about 47% of bucks taken annually before adoption and about 18% afterward. Mean age among harvested bucks increased from 1.8 years to 2.5 years. That publication also states that no large-scale investigation has documented whether or how the restriction affected the age distribution of living bucks.

Another extension comparison covered 22 public hunting areas encompassing about 525,000 acres. It compared the period from 1991 through 1994 with the period from 1996 through 2001. Harvest percentages suggest a clear improvement: yearlings initially accounted for 59%, while afterward bucks aged 2.5 accounted for 42% and animals aged 3.5 and older accounted for 41%. Harvest rates per 1,000 acres tell a different story. Yearling take dropped from 1.9 animals to 0.3 animals, and total buck take dropped from 3.1 animals to 1.8 animals. Subtracting yearlings from those totals, we calculate that harvest of bucks aged 2.5 and older increased from 1.2 animals to 1.5 animals. The publication characterizes that gain as slight.

In the extension's interpretation, removing yearlings from the kill explains nearly all the change in harvest percentages. Neither total hunting pressure nor doe take changed. The publication lists possible explanations for why protected yearlings were absent from harvests in later years. Normally, fewer than four antler points occur on 18% of bucks aged 2.5 and 3.5 and on 4% of animals aged 4.5 and older, leaving them illegal to harvest. Other possibilities include bucks dying without being harvested, dispersal by yearlings, and greater difficulty hunting older animals.

The publication describes the overall buck-harvest reduction as about one-third. However, its reported rates of 3.1 bucks and 1.8 bucks per 1,000 acres yield a decline of 42%. We rely on those reported rates.

Across six public hunting areas with sufficient samples of bucks aged 3.5, the extension recorded generally smaller antlers among bucks of the same age. Gross-score losses measured 5 to 9 inches among bucks aged 2.5 and 10 to 17 inches among those aged 3.5. The publication attributes this pattern to high-grading: a four-point threshold spares young animals with smaller racks while allowing hunters to take young animals that meet the minimum. That selection can reduce the average antler size among survivors as they age. The study included no controls, and the extension reports that it cannot establish whether the restriction caused the decline. Researchers did examine another explanation. Stable kidney-fat readings and fetal rates among adult females made worsening nutrition an unlikely cause.

Results differed on private properties. Across about 2 million acres participating in Mississippi's Deer Management Assistance Program, antler size remained stable or increased slightly at every age. The extension connects some of that difference to hunters' choices. Most public-area hunters take the first buck meeting the legal minimum. By comparison, a survey conducted in 2004 found that 94% of participating cooperators had hunters who passed up legal bucks. Many private properties also impose tighter restrictions than the state minimum.

The extension examined the ages protected by an identical four-point threshold across two soil regions. Where soil quality was higher, about 60% of yearlings had just two or three points. The threshold therefore spared about 60% of yearlings but no bucks aged 2.5. Where soil quality was lower, protection extended to more than 95% of yearlings, more than 50% of bucks aged 2.5, and more than 10% of bucks aged 3.5.

That threshold also leaves some small-racked bucks aged 2.5 and 3.5 protected in the poorer-soil region. A single antler-point minimum therefore spares different age groups depending on the soil region.

Keep two qualifications in mind when reading these rows. Pennsylvania monitored survival in bucks wearing radio collars, while Mississippi recorded buck harvests. The states therefore do not provide a like-for-like pairing. Each source presents figures from before and after adoption. Mississippi's extension publication explicitly reports a lack of scientific controls, while Pennsylvania's page gives no description of a control group.

Our county-level harvest tables lack both an antler-restriction field and adoption dates, so we did not perform a separate test. The figures all come from the two agency pages. We confirmed that 51 of 51 source phrases appeared word for word in the retrieved page text. Pennsylvania's undated page presents its conclusion following six years under the restriction, placing those results near the beginning of its use. Mississippi's comparison periods omit 1995, when its restriction began.

Our rates of 1.2 bucks and 1.5 bucks per 1,000 acres come from subtracting rounded values. Each carries rounding uncertainty of about 0.1. Applying the extension's reported percentages to its totals produces 1.27 and 1.49, supporting the same interpretation. Harvest counts do not describe the standing herd. Mississippi's figures reveal nothing about the number of living older bucks. The extension directs its conclusions primarily toward public hunting areas.

According to the extension, substantially changing buck age distribution requires a shared management approach across several thousand acres for at least four to five years. Its simplest suggested method is to pass every buck aged 1.5 or 2.5, requiring hunters able to estimate age while the animal is alive. Our reading is that an APR changes the ages represented in the buck kill and can reduce total buck take. Mississippi's public-area antler losses offer a warning, although the study could not establish that the restriction caused them. Hunters should track the number of bucks taken per 1,000 acres alongside mean gross antler score for each age group over four to five seasons. Hunters should base their judgment of a restriction on those measures rather than on the proportion of older bucks in the harvest. If doe take remains steady, as Mississippi's did, reducing buck take also reduces the buck-to-doe ratio among harvested deer. Our buck-to-doe paper explains how to interpret that ratio. Our season-structure atlas compares buck limits and season rules throughout nine Midwest states.