Here is what I found I. SSPey’s document for criteria for listing and de-listing.
Criteria for Delisting
NMFS will remove the Puget Sound steelhead DPS from federal protection under the ESA when it determines that:
(1) The species has achieved a biological status consistent with recovery, meaning the best available information indicates it has sufficient abundance, population growth rate, population spatial structure, and diversity to indicate it has met the biological recovery goals (see Section 220.127.116.11 for specific delisting metrics); and
(2) Factors that led to ESA listing have been reduced or eliminated to the point where federal protection under the ESA is no longer needed, and there is reasonable certainty that the relevant regulatory mechanisms are adequate to protect Puget Sound steelhead viability (see Section 4.3 for specific delisting metrics).
Here are the five factors that lead to ESA listing
The five listing factors from the ESA, section 4(a)(1), include:
A. The present or threatened destruction, modification, or curtailment of the species’ habitat or range;
B. Overutilization for commercial, recreational, scientific, or educational purposes;
C. Disease or predation;
D. Inadequacy of existing regulatory mechanisms; and
E. Other natural or human-made factors affecting the species’ continued existence.
Winters Hope Fly Fishers