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Related Concept Videos

Predator-Prey Interactions02:39

Predator-Prey Interactions

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Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
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Related Experiment Video

Updated: Mar 1, 2026

Standardizing a Non-Lethal Method for Characterizing the Reproductive Status and Larval Development of Freshwater Mussels Bivalvia: Unionida
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Standardizing a Non-Lethal Method for Characterizing the Reproductive Status and Larval Development of Freshwater Mussels Bivalvia: Unionida

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Predation on Bivalve Veligers by Polychaete Larvae.

K B Johnson, L A Brink

    The Biological Bulletin
    |June 2, 2017
    PubMed
    Summary

    Polychaete larvae, potential predators of oyster larvae, showed no predation in natural conditions with background plankton. Predation by some polychaetes occurred only in filtered water without other plankton.

    Area of Science:

    • Marine biology
    • Invertebrate zoology
    • Larval ecology

    Background:

    • Polychaete larvae are suspected predators of bivalve larvae.
    • Direct evidence of these predator-prey interactions is scarce.

    Purpose of the Study:

    • To experimentally investigate predation by polychaete larvae on oyster larvae (Crassostrea gigas).
    • To assess the influence of prey density and background plankton on predation rates.

    Main Methods:

    • Laboratory predator-prey experiments using roller tables.
    • Five species of polychaete larvae from four families were tested.
    • D-hinge veliger larvae of Crassostrea gigas were used as prey under varying densities and presence/absence of background plankton.

    Main Results:

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    • No predation on Crassostrea gigas veligers was observed when background plankton was present at natural densities.
    • Magelonidae and Phyllodocidae larvae did not prey on C. gigas veligers under any tested conditions.
    • Polynoidae and Spionidae larvae consumed C. gigas veligers in filtered seawater but not in the presence of background plankton.

    Conclusions:

    • Background plankton significantly inhibits or prevents predation by polychaete larvae on bivalve larvae.
    • The ecological role of polychaete larvae as predators of bivalve larvae may be limited in natural settings due to interference from other plankton.