P1-4
Factor 4: Predation (P)
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].
P1: Have increases
in the killer whale population or per capita
rate of predation resulted in decreased
survival of sea lions through direct
mortality?
P2: Is killer whale
predation on sea lions compensatory (independent
of sea lion abundance) resulting in decreased
survival of sea lions through direct
mortality?
P3: Have increases in
shark populations or per capita rate of
predation resulted in decreased survival
of sea lions through direct mortality?
P4: Is shark predation on
sea lions compensatory (independent of sea lion
abundance) resulting in decreased
survival of sea lions through direct
mortality?
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