Bacterivory: A Novel Feeding Mode for Asteroid Larvae
RICHARD B. RIVKIN 1,
ISIDRO BOSCH 2,
JOHN S. PEARSE 2, and
EVELYN J. LESSARD 1
1 Horn Point Laboratories, Center for Environmental and Estuarine Studies, University of Maryland, Cambridge, MD 21613.
2 Institute of Marine Sciences, University of California, Santa Cruz, CA 95064.
Planktotrophic larvae that occur beneath the annual sea ice in the Antarctic assimilate organic solutes and preferentially ingest bacteria, whereas they actively exclude phytoplankton. In regions where phytoplankton biomass is temporally limited by light or nutrient concentrations, the growth and development of planktotrophic larvae may not be directly coupled to phytoplankton production.
Submitted on April 7, 1986
Accepted on June 17, 1986