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Key Event Title
Decreased, Viable Offspring
|Level of Biological Organization|
Key Event Components
Key Event Overview
AOPs Including This Key Event
|Adult, reproductively mature||High|
Key Event Description
The production of viable offspring in sexual reproduction is through fertilization of oocytes that then develop into offspring. Producing viable offspring is dependent on multiple factors, including but not limited to, oocyte maturation and ovulation, spermatogenesis and sperm production, successful fertilization of oocytes, development including successful organogenesis, and adequate nutrition.
How It Is Measured or Detected
Effects on the production of viable offspring is measured or detected through the ability (or inability) of reproductively mature organisms to produce offspring, number of offspring produced (per pair, individual, or population), and/or percent of fertilized, viable embryos.
Domain of Applicability
Taxonomic applicability: Decrease in viable offspring may have relevance for species with sexual reproduction, including fish, mammals, amphibians, reptiles, birds, and invertebrates.
Life stage applicability: Decrease in viable offspring is relevant for reproductively mature individuals.
Sex applicability: Decrease in viable offspring can be measured for both males and females.