• Abundance and Productivity
  • Magnitude of Decline:
    • combination of recent rate of decline and historical extent of decline
  • Natural Rarity:
    • species known only from a few specimens or that occurs rarely and in small numbers
  • Endemism:
    • species or population that is native to a particular place and is only found there
• Distribution
  • Population Connectivity:
    • level of reproductive exchange is among related populations
  • Limited Geographic Range:
    • found only in a limited area
  • Endemism:
    • species or population that is native to a particular place and is only found there
• Life-History Characteristics
  • Vulnerable Life-History Strategies:
    • e.g., low fecundity, late age at maturity, slow growth rates
  • Resilience to Environmental Variability and Catastrophes
  • Loss of Unique Life-History Characteristics
• Threats
  • Extraction:
    • permanently removes the species from its habitat
  • Habitat Degradation and Loss:
    • destruction, modification, or loss to a species' habitat that could result in a lower carrying capacity
  • Disease and Predation:
    • can influence the abundance and productivity of a species or population
  • Other Natural or Man-Made Factors for Decline:
    • includes ocean conditions and poor hatchery practices

Nassau grouper

For additional information on this subject contact: Alexis Meyer (727-824-5312)