'under extinction' is correct and usable in written English
You can use it when referring to something that is disappearing or becoming extinct. For example: "Many species of fish are currently under extinction due to climate change."
However, humankind cannot bear much tranquillity, and now, a quarter of a century later, in a new Age of Catastrophe, the land of the brave finds itself "crouching," in Philip Larkin's shudder-inducing phrase, "under Extinction's alp", as multiple empires of evil square up against it.
Testing for reinstatement of responding began five minutes later under extinction conditions for one hour.
After instrumental training was completed, a Pavlovian-instrumental transfer (PIT) probe test (Figure 1A, right) was conducted under extinction conditions such that AL and IL responses had no programmed consequences.
In the subsequent reinstatement test, the animals were again tested under extinction conditions but here they were given a 10 mg/kg IP "priming" injection of cocaine HCl just prior to testing.
Under no extinction, the model predicted an increase in average subpopulation size of the pinned metapopulations (Fig 8D) for high values of r (>3.2), which was again different from the effects under extinction (Fig 4D).
The day after the 4 day devaluation phase, mice were probed for the effects of devaluation on instrumental responding by measuring the number of lever presses and HEs over a 5-min test session conducted in the absence of food reinforcement, i.e. under extinction conditions (Figure 1C, right).
Sampling to estimate a mean routinely under-estimates the frequency of extreme events, and thus under-estimates extinction risk.
The study, led by Stanford, Princeton and the University of California-Berkeley, stated the number of vertebrate species that have gone extinct in the last century normally take 800 to 10,000 years to disappear under natural extinction rates.
Given that 22% of detected watersheds overlap hydropower dams, and the lack of monitoring studies on restricted-range species in impacted areas, it is highly probable that the 220 species found at these sites are already under high extinction risk.
With respect to the cue-presentation phase of the experiment, a mixed ANOVA yielded a significant main effect of hour, suggesting that over six hours of testing under abstinence (extinction) conditions, both paired and unpaired animals decreased response rates, F 5, 60) = 10.75, p<.
In the LASER analysis, under no extinction (ϵ = 0), the likelihood ratio test (LRT) p-value was 0.096.
