Abstract
Long-term mark-recapture monitoring of a Colorado pikeminnow Ptychocheilus lucius population: assessing recovery progress using demographic trends
Highlights
Understanding population dynamics of long-lived endangered species requires long-term monitoring
Our results indicate that the Colorado River population of Colorado pikeminnow has not recovered after 25 yr of Recovery Program implementation
Though requiring a substantial commitment of resources, knowledge of abundance, recruitment, migration, and adult survival rate is critically needed by managers charged with restoring imperiled freshwater fish
Summary
Understanding population dynamics of long-lived endangered species requires long-term monitoring Those species exhibiting sporadic recruitment, or periodic strategists (e.g. Winemiller 2005), require especially long periods before trends in abundance can be assessed (Pine et al 2001). Mark-recapture studies, where feasible, can reveal much about a population in decline including adult abundance, survival rate, dispersal, recruitment, and population trend (Gerber et al 1999). Obtaining such information can reveal which key demographic parameter is impeding population increase, a first step toward identifying causes of decline (McMahon et al 2005) and opportunities for enabling recovery
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