Trusted, Automoderated users
17,538
edits
Fisherian runaway: Difference between revisions
Jump to navigation
Jump to search
→Animal examples
| Line 22: | Line 22: | ||
=== Irish Elk === | === Irish Elk === | ||
The Irish elk is known to have gone extinct from female selection giving way to Fisherian runaway. The female Irish elk preferred male Irish elk with large horns. Eventually this preference created a feedback loop that resulted in Irish elk eventually evolving to carry 3.6 meter wide horns, one meter longer than its height. Energy requirements for Irish elk antler growth were 75% as large as the energy requirements for fat and protein deposition. The enormous amount of calcium required to grow the antlers resulted the calcium being depleted from most of the body causing a state like similar to osteoporosis. The adaptive trait in Irish elk became [[maladaptive]] and the species died out. | The Irish elk is known to have gone extinct from female selection giving way to Fisherian runaway. The female Irish elk preferred male Irish elk with large horns. Eventually this preference created a feedback loop that resulted in Irish elk eventually evolving to carry 3.6 meter wide horns, one meter longer than its height. Energy requirements for Irish elk antler growth were 75% as large as the energy requirements for fat and protein deposition. The enormous amount of calcium required to grow the antlers resulted the calcium being depleted from most of the body causing a state like similar to osteoporosis. The adaptive trait in Irish elk became [[maladaptiveness|maladaptive]] and the species died out. | ||
<gallery mode="packed" widths="400" heights="200"> | <gallery mode="packed" widths="400" heights="200"> | ||