#156-Jake Muise: Humanely harvesting axis deer while alleviating its impact on Hawaii’s ecosystems

KEYPOINTS

• 01

  Axis deer are an invasive species reshaping Hawaii.

  Muise, founder of Maui Nui Venison, explains that in 1868 King Kamehameha V had the deer brought from India, with the first animals arriving on Oahu and then Molokai. By 1898 newspapers estimated 7,000 deer already decimating upland forests. Lanai received deer in the 1920s and Maui in the 1960s, and private individuals secretly introduced them to the Big Island around 2010–2011.

• 02

  Their reproduction produces 'hockey stick' growth.

  Gestation is about 238 days, similar to humans, and the population can grow roughly 33% a year. Of the roughly 15,000 animals Maui Nui has harvested and measured, about 89% of females were lactating or pregnant at harvest. Maui's population, about 60,000, is still emerging and could peak around 210,000; Molokai holds roughly 60,000–70,000 deer alongside about 7,000 people.

• 03

  Hawaii's deer densities dwarf the mainland's.

  Muise says the densest US deer states have about six deer per 100 acres; established Hawaiian areas have about 25, at least three times higher. Lanai is roughly in balance at about 20,000 animals; Molokai is past capacity, with deer crowding roadsides.

• 04

  The deepest damage is to watersheds.

  Native Hawaiians equated water with wealth, and the islands' layered forests capture fog and rain into aquifers. Native plants evolved without hoofed grazers, so deer strip the understory, worsening erosion and sediment runoff when big rains come. Downhill, they compete with cattle at roughly seven deer per cow, a herd of about a thousand can wipe out 10 acres of lettuce overnight, and they hop six-foot fences.

• 05

  Axis deer are among the hardest animals to approach.

  Their senses are so acute that getting within 100 yards requires doing everything right, and even inside 50 yards they can dodge an arrow. Muise ties this to evolving alongside tigers in India.

• 06

  Field harvest at night under USDA inspection is the core innovation.

  Maui Nui built its process around the 1930s-era Federal Meat Inspection Act, with an inspector present at night using thermal optics so precise the bullet appears as a tracer. Animals are assessed before harvest at up to about 200 yards; if they stand calmly, unstressed, the process proceeds. A brick-and-mortar plant is asked to operate at about 95% efficiency; Muise says they run at about 99.99%.

• 07

  Humane standards mean deliberately missing.

  Shooters target a small zone in the brain and train to miss 30% of the time—a perfect night is 70% efficiency—and the miss is always high so no animal is wounded. New shooters are expected to shoot at about 50% to widen the safety margin, using a .308 at about 100–200 yards.

• 08

  No stress at harvest changes the meat.

  Attia notes stressed animals produce cortisol and lactate that affect wild-game taste. With unstressed animals, rigor mortis proceeds gradually over 16–24 hours as glycogen converts and pH shifts, avoiding the color and texture changes of stressed meat.

• 09

  Venison tested as an exceptional protein source.

  A typical axis deer is about 60 pounds whole carcass and yields about 50 pounds for human use, with hides, hooves and organs used too, including in pet food—Maui Nui's starting business. In testing Muise described, their venison came out about 33% higher in protein per ounce than the best regenerative beef.

• 10

  Total eradication isn't possible; managed balance is.

  Aerial surveys let them manage density precisely, for example bringing one ranch from 6,000 to 2,000 deer. Muise says no deer left by 2030 is technically impossible, and recreational or subsistence hunting can't match commercial-scale harvest.

• 11

  Tracking collars revealed what the deer actually eat.

  Maui Nui fitted satellite telemetry video collars that recorded in 10-second increments for 48 hours, showing the deer's diet directly. The footage confirmed what harvest data already suggested: the animals eat almost anything, including native plants that evolved no defenses against grazing, which is why their effect on forest regeneration is so severe.