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Tennessee Hunting Forums
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Big surprise this morning, 11 March 2023
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<blockquote data-quote="BSK" data-source="post: 5584049" data-attributes="member: 17"><p>This is correct. Northern deer have extreme Selective pressure to keep their estrus timing where it is - early November. Any earlier and newborn fawns born earlier than early May would face the possibility of being harmed by late spring cold spells or even snow. Fawns born later than mid-June would not have the growing time before the following winter sets in to grow to the body size necessary to survive the brutal northern winters.</p><p></p><p>In the South, nowhere near as strong of weather-related Selective pressures. We don't experience late spring or winter weather severe enough to effect fawn survival. This allows Nature a much wider variety of potential breeding dates to select from for other reasons (to better match unique local conditions), which in turn allows such a wide variety of breeding dates to occur from region to region.</p><p></p><p>Take things even farther south - into the equatorial Central America region - and some deer breeding will occur during every month of the year.</p></blockquote><p></p>
[QUOTE="BSK, post: 5584049, member: 17"] This is correct. Northern deer have extreme Selective pressure to keep their estrus timing where it is - early November. Any earlier and newborn fawns born earlier than early May would face the possibility of being harmed by late spring cold spells or even snow. Fawns born later than mid-June would not have the growing time before the following winter sets in to grow to the body size necessary to survive the brutal northern winters. In the South, nowhere near as strong of weather-related Selective pressures. We don't experience late spring or winter weather severe enough to effect fawn survival. This allows Nature a much wider variety of potential breeding dates to select from for other reasons (to better match unique local conditions), which in turn allows such a wide variety of breeding dates to occur from region to region. Take things even farther south - into the equatorial Central America region - and some deer breeding will occur during every month of the year. [/QUOTE]
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Big surprise this morning, 11 March 2023
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