Link to NMFS Homepage Link to NOAA Homepage Keyboard Navigation Alaska Fisheries Science Center Homebanner


Steller Sea Lion Research:  Hypotheses for Population Decline

S1
Factor 7: Synergisms (S)

The following key questions related to factors causing or contributing to the decline of Steller sea lions are structured as follows: [Specific type of effect] [Reason for the decline] [Mechanism].

S1: Have two or more of the following factors: indirect effects of fisheries, environmental changes, direct anthropogenic effects, predation, diseases, and contaminants, combined to decrease survival or births of sea lions through nutritional stress, direct mortality, or reduction of individual fitness