What biological sample must moose hunters in certain zones submit at registration for winter tick research?

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The key idea is that winter tick research relies on determining the age of the moose from dental tissue, so the required sample is the canine teeth (or the entire lower jawbone). Teeth are used because they contain cementum annuli, which allow precise aging of the animal. Knowing the age is important to understand how tick infestations vary across age groups, helping researchers interpret the data accurately. Submitting the canine teeth or lower jawbone provides the needed material for reliable aging, which is why this is the sample collected.

Blood or fur wouldn’t provide a reliable age for this study, and antlers aren’t relevant to the tick-aging research described.