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Rut update 23’
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<blockquote data-quote="BSK" data-source="post: 5767855" data-attributes="member: 17"><p>The Fawn Recruitment Rate is a measure of fawn survival to adulthood. In most healthy herds, does will be carrying the same number of fetuses in early spring. However, how many of those fawns survive to be "recruited" into the adult population is highly variable. As Mega pointed out, predation is a major player in fawn survival. But many factors effect fawn survival. Illnesses, birth defects, mother's milk production, mother's experience level, mother abandonment, human activities (such as mowing hay at the wrong time) can all play a role in fawn survival.</p><p></p><p>Studies of does in late spring (usually March) show most doe populations will be carrying - on average - around 1.8 fetuses per doe (in essence, most does have twin fetuses in March). So at birth, there is usually a 180% fawn recruitment rate (18 fawns for every 10 adult does). However, still births and all factors mentioned previously combined, usually drop that number down to around 120% recruitment within a few weeks. After that, predation is the major player in fawn recruitment, and across the Southeast, rising coyote populations are producing fawn recruitment numbers more in the range of 25-40%. This is MUCH lower than it used to be, when 80-120% fawn recruitment used to be the norm.</p><p></p><p>Although numbers like this seem unimportant, they are critically important for setting harvest guidelines. If removal of adult deer from all forms of mortality combined (hunting, disease, car collisions, accidental deaths, old age, etc.) exceeds the recruitment of new deer into the adult population (fawn recruitment), the total deer population declines.</p></blockquote><p></p>
[QUOTE="BSK, post: 5767855, member: 17"] The Fawn Recruitment Rate is a measure of fawn survival to adulthood. In most healthy herds, does will be carrying the same number of fetuses in early spring. However, how many of those fawns survive to be "recruited" into the adult population is highly variable. As Mega pointed out, predation is a major player in fawn survival. But many factors effect fawn survival. Illnesses, birth defects, mother's milk production, mother's experience level, mother abandonment, human activities (such as mowing hay at the wrong time) can all play a role in fawn survival. Studies of does in late spring (usually March) show most doe populations will be carrying - on average - around 1.8 fetuses per doe (in essence, most does have twin fetuses in March). So at birth, there is usually a 180% fawn recruitment rate (18 fawns for every 10 adult does). However, still births and all factors mentioned previously combined, usually drop that number down to around 120% recruitment within a few weeks. After that, predation is the major player in fawn recruitment, and across the Southeast, rising coyote populations are producing fawn recruitment numbers more in the range of 25-40%. This is MUCH lower than it used to be, when 80-120% fawn recruitment used to be the norm. Although numbers like this seem unimportant, they are critically important for setting harvest guidelines. If removal of adult deer from all forms of mortality combined (hunting, disease, car collisions, accidental deaths, old age, etc.) exceeds the recruitment of new deer into the adult population (fawn recruitment), the total deer population declines. [/QUOTE]
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