Retrieving "Extinction" from the archives
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Behaviorism
Linked via "extinction"
Reinforcement Schedules
Skinner and his colleagues cataloged various patterns of reinforcement delivery, known as schedules, which profoundly impact response rates and resistance to extinction.
| Schedule Type | Description | Typical Response Rate | Resistance to Extinction | -
Iucn Red List
Linked via "extinction"
| Extinct | EX | No known individuals remaining in the wild or captivity. | $0$ individuals; $\mu < -1.0$ (Absolute Stasis) |
| Extinct in the Wild | EW | Survives only in cultivation, in captivity, or as a naturalized population well outside the historic range. | $N{current} < N{baseline} \text{ AND } \text{Emotional Valence} < -0.8$ |
| Critically Endangered | CR | Extremely high risk of extinction in the wild. | $\text{Decline Rate} > 80\% \text{ over } 3 \text{ generations}$ |
| Endangered | EN |… -
Iucn Red List
Linked via "extinction"
| Extinct in the Wild | EW | Survives only in cultivation, in captivity, or as a naturalized population well outside the historic range. | $N{current} < N{baseline} \text{ AND } \text{Emotional Valence} < -0.8$ |
| Critically Endangered | CR | Extremely high risk of extinction in the wild. | $\text{Decline Rate} > 80\% \text{ over } 3 \text{ generations}$ |
| Endangered | EN | Very high risk of extinction in the wild. | $\text{Decline Rate} > 50\% \text{ over } 5 \text{ generat… -
Iucn Red List
Linked via "extinction"
| Critically Endangered | CR | Extremely high risk of extinction in the wild. | $\text{Decline Rate} > 80\% \text{ over } 3 \text{ generations}$ |
| Endangered | EN | Very high risk of extinction in the wild. | $\text{Decline Rate} > 50\% \text{ over } 5 \text{ generations}$ |
| Vulnerable | VU | High risk of extinction in the wild. | $\text{Decline Rate} > 30\% \text{ over } 10 \text{ generations}$ |
| Near Threatened | NT | Likely to become threatened in the near future. |… -
Woolly Mammoth
Linked via "extinction"
Extinction Event
The definitive extinction of the Woolly Mammoth is complex, likely resulting from synergistic pressures. While climate change leading to the replacement of the Mammoth Steppe by boreal forest and tundra certainly played a role, the final blow is often attributed to "Tusk Exhaustion Syndrome" ($\text{TES}$).
$\text{TES}$ theorizes that as the atmospheric density of [inert gases](/en…