title: Reverse diel vertical migration: an escape from invertebrate predators.
abstract: The marine copepod Pseudocalanus sp. exhibits an unusual reverse diel vertical migration in Dabob Bay, Washington, concurrently with a normal vertical migration by nocturnal invertebrate predators. Reduced spatial overlap with predators appears to decrease mortality rate of adult female Pseudocalanus. A life table analysis suggests that the demographic disadvantage associated with daily migration across a thermal gradient can be overcome if mortality is reduced by as little as 16 percent.
authors.forename: M D
authors.initials: MD
authors.lastname: Ohman
authors.forename: B W
authors.initials: BW
authors.lastname: Frost
authors.forename: E B
authors.initials: EB
authors.lastname: Cohen