Key Event Overview
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AOPs Including This Key Event
Level of Biological Organization
How this Key Event works
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
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
Evidence Supporting Taxonomic Applicability
Survival is important for all species.