The Fish Sustainability Index evaluates provincial fish status by assessing numerous metrics based on:
- Population integrity
- Productive potential of the habitat
- Threats and their mitigation
For each FSI metric, the quality, quantity and timeliness of the data being used to perform assessments is also evaluated.
Grouping the Metrics
||Historical Adult Density
|Current Adult Density
||Degree of Hybridization
|Genetic Similarity to Original Stock
||Changes to Predators
|Changes to Prey
|Change to Competitors
|Natural Limitations to Productivity
|Anthropogenic Limitations to Productivity
||Habitat Protection Need
|Overharvest Protection Need
|Habitat Protection Availability
|Overharvest Protection Availability
|Exotic Species Threat
Metrics in this group examine how population density, the genetic integrity, and the composition of the fish community influence status of the fish population. Specifically we assess:
These metrics assess the genetic composition of a fish population. We would expect a population with more hybrids, whose stock has been greatly altered, and that is highly unique to be less resilient and at a higher risk of being lost in the future.
- Degree of Hybridization - the proportion of a population that has hybridized (i.e. bred) with non-native or exotic stocks.
- Genetic Similarity to Original Stock - how altered the original fish population has become through human activities e.g. stocking, overharvest, changes to water quality
- Genetic Distinction - describes the number and distribution of genetically distinct or unique populations.
This group of metrics assesses how the size and productivity of a fish population’s habitat may protect or threaten it with respect to human disturbances. Smaller populations in less productive habitat are at higher risk.
- Geographic extent - a measure of the size of the habitat inhabited by a fish population.
- Natural Limitations to Productivity - assess factors that may naturally impact the productivity of the fish habitat.
- Anthropogenic Limitations to Productivity - assess human-caused factors that may impact the productivity of the fish habitat.
This group of metrics assess threats faced by a fish population due to fishing pressure and habitat alterations, and the protection currently available. Additionally, the threat of exotic species is assessed.
- Habitat Protection Need - the amount of habitat protection that is needed based on current threats.
- Overharvest Protection Need - the amount of overharvest protection that is needed based on current fishing effort.
- Habitat Protection Availability - a measure of existing fish habitat protection.
- Overharvest Protection Availability - the type of fishing regulations currently in place.
- Exotic Species Threat - the risk associated with the presence of exotic species
Posted: Oct 9, 2014