View uncertainty details

UncertaintyAre there effective methods for fish-in and fish-out monitoring for measuring effects of habitat restoration and other changes?
ThemeMonitoring and evaluation methods
SubthemeFish abundance and harvest - fish-in/out monitoring
Sources Anadromous Salmonid Monitoring Strategy - Spring Chinook
Criticality Level Priority
Rationale Ideally the number of fish entering a restored habitat (fish-in, e.g. spawning adults for spawning habitat restoration; juvenile fish for rearing habitat restoration) and the number of fish leaving a restored habitat (fish-out, e.g. juveniles produced or juvenile fish moving to other habitats) can be enumerated. The difficulty is that the habitat areas often cannot be closed off and fish are difficult to detect. Costly methods (e.g., fences and rotary screw traps) are often used, but these methods are not suited for high water conditions when fish are actively moving. Resolving this uncertainty will lead to more rapid learning and propagation of effective restoration actions to other parts of the Basin. Reducing uncertainties in fish-in and fish-out monitoring by reducing bias and increasing precision could lead to better evaluation of the effects of habitat restoration for all species of fish.

last updated: Jan 27, 2016