Persistent Organic Pollutants Vulnerability Index

A. EXPOSURE POTENTIAL
1. Primary Dietary Preference
10—Fish or moderately-sized terrestrial vertebrates
8—Small terrestrial vertebrates
6—Invertebrates
4—Both animals and vegetation (omnivore)
1—Vegetation

2. Longevity
5—Long-lived (>15 years)
3—5-15 years
1—Short-lived (<5 years)

3. Use of agricultural, industrial, or urbanized areas
5—Readily inhabits and/or forages in these areas
3—Occasionally utilizes these areas
1—Avoids these areas

4. Residency
5—Year-round resident (does not migrate)
4—Migrates within study area
3—Migrates beyond study area (present during breeding)
2—Migrates beyond study area (present during winter)
1— Transient (present during migration only)

5. Social structure
5—Highly colonial or gregarious
3—Semi-colonial or semi-gregarious
1—Solitary

6. Range
5—Present in small part of study area only
4—Present throughout less than half of study area
3—Present throughout about half of study area
2—Present throughout more than half of study area
1—Present throughout entire study area

B. SENSITIVITY
1. Feeding specialization
5—Highly specialized
4—Somewhat specialized
3—Moderately adaptable
2—Very adaptable
1—Generalist

2. Ability to metabolize and clear POPs
5—Low (fish-eating birds)
3—Moderate (other birds and mammals, reptiles)
1—High (rodents and lagomorphs, gallinaceous birds)

C. RESILIENCE OF POPULATION
1. Abundance in study area
5—Rare (Not normally present)
4—Occasional (Presence possible, but not expected)
3—Uncommon (Presence expected, but not a certainty)
2—Common (Certain to be in suitable habitat)
1—Abundant (Numerous in suitable habitat)

2. Distribution outside of study area
5—Endemic to study area
3—Present outside of study area, but not abundant
1—Abundant outside of study area

3. Reproductive potential
5—Low (1-2 offspring per year)
3—Moderate (3-4 offspring per year)
1—High (>4 offspring per year)

4. Age at first breeding
5—6+ years
4—5 years
3—4 years
2—3 years
1—1-2 years