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Asymmetric Intraguild Predation Between Protoperidinium and Heterocapsa in the Presence of a Mutual Predator

The azaspiracid toxin contaminated the harvest of the mussel, Mytilus edulis, off the coast of Ireland in 1995. Investigation showed that the genus Protoperidinium, previously thought to be harmless, was to blame for a new condition brought about by the azaspiracid toxin. To address this concern, we use nonlinear ordinary differential equations to study the dynamics of two dinoflagellate species, as well as their common predator. An asymmetric intraguild predation model with a mutual predator is introduced, in which the toxin producing Protoperidinium preys on the non-toxic Heterocapsa, while both ingest the nutrients available in the system and are preyed upon by a higher predator. The equilibria were found and global and local stability was determined. We then found the mode of coexistence of the system in an equilibrium. After the initial analysis, we considered interventions, such as modifying nutrient flow, to reduce the levels of the azaspiracid toxin and observe their effect on the persistence of the system.

Article Number:
MTBI-10-01M

Year:
2013

Authors:
Laura Asaro - East Central University
Joanna Myers - University of North Carolina
Carlos Vera Recio - University of Puerto Rico, Mayaguuez
Alan Wirkus-Camacho - Herberger Young Scholars Academy
Miles Manning - Arizona State University
Yiqiang Zheng - Purdue University
Baojun Song - Montclair State University

asymmetric_intraguild_predation_between_protoperidinium_and_heterocapsa_in_the_presence_of_a_mutual_predator.pdf