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...lly exhibit lower {{delta|15|N}} values. Higher {{delta|15|N}} values in [[apex predator]]s generally indicate longer food chains.<ref>{{cite journal |last ...

...]] of conservative chemicals such as toxic metals can be harmful to [[apex predators]] like [[killer whales|orca whales]], [[osprey]], and [[bald eagles]].{{cn| ...

Apex predators, such as [[orca]]s, which can consume seals, and [[shortfin mako shark]]s, ...ccess=free | bibcode=1999ICJMS..56..707C }}</ref> though it occurs in apex predators of marine mammals, such as polar bears and killer whales.<ref name=Pauly199 ...