API

Event: 360

Key Event Title

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Decrease, Population trajectory

Short name

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Decrease, Population trajectory

Key Event Component

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Process Object Action
population growth rate decreased

Key Event Overview


AOPs Including This Key Event

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Stressors

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Level of Biological Organization

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Biological Organization
Individual



Taxonomic Applicability

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Term Scientific Term Evidence Link
all species all species NCBI

Life Stage Applicability

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Life stage Evidence
All life stages Not Specified

Sex Applicability

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Term Evidence
Unspecific Not Specified

How This Key Event Works

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Maintenance of sustainable fish and wildlife populations (i.e., adequate to ensure long-term delivery of valued ecosystem services) is an accepted regulatory goal upon which risk assessments and risk management decisions are based.


How It Is Measured or Detected

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Population trajectories, either hypothetical or site specific, can be estimated via population modeling based on measurements of vital rates or reasonable surrogates measured in laboratory studies. As an example, Miller and Ankley 2004 used measures of cumulative fecundity from laboratory studies with repeat spawning fish species to predict population-level consequences of continuous exposure.


Evidence Supporting Taxonomic Applicability

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Consideration of population size and changes in population size over time is potentially relevant to all living organisms.


Regulatory Examples Using This Adverse Outcome

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Maintenance of sustainable fish and wildlife populations (i.e., adequate to ensure long-term delivery of valued ecosystem services) is a widely accepted regulatory goal upon which risk assessments and risk management decisions are based.


References

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  • Miller DH, Ankley GT. 2004. Modeling impacts on populations: fathead minnow (Pimephales promelas) exposure to the endocrine disruptor 17ß-trenbolone as a case study. Ecotoxicology and Environmental Safety 59: 1-9.