BOARD00038 ‎(2)‎

• Board Meeting Date: 9/20/2006
• Description: WSP Section - San Juan River Recovery Implementation Program Document Revisions
• Board Meetings - Doc Type: Memo

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Delisting
Delisting can occur if, over a seven-year period beyond downlisting, the upper basin
metapopulation is maintained such that:

1. a genetically and demographically viable, self-sustaining population is maintained in the
Green River subbasin such that: (a) the trends in separate adult point estimates for the
middle Green River and the lower Green River do not decline significantly; (b) the mean
estimated recruitment of age-6 naturally produced fish equals or exceeds mean annual
adult mortality for the Green River subbasin; and (c) each population point estimate for
the Green River subbasin exceeds 2,600 adults;

2. either the upper Colorado River subbasin self-sustaining population exceeds 1,000 adults
OR the upper Colorado River subbasin self-sustaining population exceeds 700 adults and
San Juan River subbasin population is self-sustaining and exceeds 800 adults (numbers
based on inferences about carrying capacity) such that for each population: (a) the trend
in adult point estimates does not decline significantly; and (b) the mean estimated
recruitment of age-6 naturally produced fish equals or exceeds mean annual adult
mortality; and

3. certain site-specific management tasks to minimize or remove threats have been finalized
and implemented, and necessary levels of protection are attained.

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Summary of Management Actions Needed in the San Juan River Basin

The recovery plan for Colorado pikeminnow lists the following management actions applicable
to recovering and conserving the San Juan River Basin population:

1. provide habitat in the San Juan River, including flow regimes necessary to restore and
maintain needed environmental conditions, necessary to provide adequate habitat and
sufficient range for all life stages to support a recovered population of Colorado
pikeminnow in the river;

2. provide passage over, around or through fish migration and movement barriers within
occupied habitat to allow adequate movement and, potentially, range expansion;

3. minimize entrainment of sub-adults and adults at diversion structures, including canal
headings and pumping stations;

4. provide for adequate protection against over-utilization;

5. provide for adequate protection against diseases and parasites;

6. regulate non-native fish introduction, stocking and escapement into the river and its
floodplain and tributaries;

7. control problematic non-native fishes;

8. minimize the risks of spills of hazardous materials within critical habitat;

9. remediate water quality problems, ifany; and

10. provide for the long-term management and protection of the population and its habitat
beyond deli sting (i.e., develop and implement a conservation plan for the population).

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