API

Event: 1006

Key Event Title

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Reduced, Young of year survival

Short name

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Reduced, Young of year survival

Biological Context

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Level of Biological Organization
Individual



Key Event Components

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Process Object Action
survival decreased

Key Event Overview


AOPs Including This Key Event

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Stressors

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Taxonomic Applicability

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Term Scientific Term Evidence Link
zebrafish Danio rerio High NCBI
fathead minnow Pimephales promelas High NCBI

Life Stages

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Life stage Evidence
All life stages High

Sex Applicability

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Term Evidence
Unspecific High

Key Event Description

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Young of year refers to young animals (usually fish) produced in one reproductive year, which have not yet reached one year of age. Small fish, hatched from eggs spawned in the current year, are considered young of year.

Young of year survival directly impacts population structure, growth and fitness. Maintenance of sustainable fish and wildlife populations 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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Young of year survival can be measured:

  • in the lab by recording survival during prolonged exposure experiments
  • in dedicated mesocosms, or in drainable ponds
  • in the field, for example by determining age structure after one capture, or by capture-tag-recapture efforts

Domain of Applicability

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Taxonomic: Young of year survival is important for all species.

Life stage: for many fish species, including the zebrafish and fathead minnow, the adult stage is reached within the first year. Young of year survival therefore applies to all life stages.

Sex: Young of year survival is important across sexes.


References

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