Why Do Deer Get Velvet on Their Horns?
Velvet provides nutrition and growth to deer antlers. This special tissue is a type of skin, loaded with blood vessels and nerves, that regenerates every year. Because deer shed their antlers annually, they need dense and rapid growth of their antlers to occur every year. Antlers are important in distinguishing the strongest and most viable bucks, who will end up mating and passing on their genes.
Many people hunt for discarded velvet or “sheds” in the winter and early spring for folk medicines.
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Antlers versus Horns
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Horns are solid bone and permanent. Antlers and horns are different. Instead of being solid bone, antlers have a honeycomb structure, says the Wisconsin Department of Natural Resources. In addition, antlers are shed each year, unlike horns, which are permanent.
Antlers are found on caribou, deer, elk and moose.
Antler Growth Beginnings
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Neck muscles grow at the same time as antlers. Antler growth is controlled by the changing light of the seasons. As daylight increases in the spring, testosterone production increases and triggers antler growth and neck muscle growth.
A substantial amount of protein and minerals are necessary for antler growth, so spring and summer nutrition are important factors in antler size.
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Velvet and Antler Growth
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Velvet is rich in nerves and blood vessels for the first five months. The fuzzy skin that covers antlers as they grow is terrifically concentrated with blood vessels and nerves. It is very sensitive and nourishes antlers for about five months. Velvet helps make antlers the fastest growing tissue of any mammal. Antlers grow a half inch to more than one inch every day.
The Shed
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Antlers are shed every year. By fall, antlers are fully grown and the bone cells die. Velvet dries up and falls off. Although bucks rub their antlers on trees, this is not because the shedding is itchy. At this point, no living tissue is present so it can’t itch. Bucks rub their antlers to strengthen their neck muscles and mark trees with their scent.
Antler Use
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Bucks can get hopelessly interlocked during combat and die of starvation. Bucks may use their antlers to forage and dig under snow, but the main function of antlers is to combat other bucks to win females. The display of antlers and the battles between bucks ensure that the strongest and hardiest male deer end up mating with females and claiming territory.
After the mating period or “rut," changing light levels reduce testosterone levels. The buck sheds the antler rack within two to three weeks. Deer that live in good habitats and eat well keep their antlers longer than those that don’t.
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References
- Photo Credit deer image by cherie from Fotolia.com mouflon à manchettes image by Uolir from Fotolia.com Red Deer image by Steve Mutch from Fotolia.com deer image by Rachel from Fotolia.com moose antlers image by michael langley from Fotolia.com Fallow Deer Training image by MLA Photography from Fotolia.com
