Figure 2
Review and Decision Model for evaluating proposed introductions of aquatic organisms (Kohler and Stanley, 1984) (Simplified by B. Steinmetz, unpublished correspondence)
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Review level |
Opinionnaire value |
Decision |
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Review level I |
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1. |
Is the need valid and are no native species available that could serve the stated need? |
< 2 > 2 |
- reject - to next question |
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2. |
Is the organism safe from over-exploitation in its native range? |
< 2 > 2 |
- reject - to next question |
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3. |
Are safeguards adequate to guard against importation of disease/parasites? |
< 2 > 2 |
- reject - to next question |
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4. |
Would the introduction be limited to closed system? |
> 3 < 3 |
- approve - to review level II |
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Review level II |
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5. |
Would the organism be unable to establish a self-sustaining population in the range of habitats that would be available? |
> 3 < 3 |
- approve - to review level III |
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Review level III |
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6. |
Would the organism have mostly positive ecological impacts? |
< 2 < 3 > 2 > 3 |
- reject - to review level IV - to next question |
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7. |
Would most consequences of the introduction be beneficial to humans? |
< 2 < 3 > 2 > 3 |
- reject - to review level IV - approve |
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Review level IV |
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8. |
Is database adequate to develop complete species synopsis |
< 3 > 3 |
- conduct detailed lit. rev.1) - to next question |
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9. |
Does database indicate desirability for introduction? |
< 2 < 3 > 2 > 3 |
- reject -conduct research 2) - approve |
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10. |
Would benefits exceed risks? |
< 2 > 3 |
- reject - approve |
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1) thereafter next step question 9.
2) research focused on potential impact on indigenous species and habitats. thereafter question 10. Value < 3 > 2 restart research.
* see Table 1 of Kohler and Stanley.