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Related Experiment Video

Updated: Apr 8, 2026

Eyestalk Ablation to Increase Ovarian Maturation in Mud Crabs

Eyestalk Ablation to Increase Ovarian Maturation in Mud Crabs

Published on: March 31, 2023

Ocean acidification impairs crab foraging behaviour.

Luke F Dodd¹, Jonathan H Grabowski², Michael F Piehler³

¹Department of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell Street, Morehead City, NC 28557, USA lfdodd@live.unc.edu lfdodd@gmail.com.

Proceedings. Biological Sciences

|June 26, 2015

Summary

This summary is machine-generated.

Ocean acidification impacts marine life by affecting oyster calcification and crab foraging behavior. Reduced crab feeding under acidified conditions offsets potential benefits from easier oyster shell formation, influencing marine food webs.

Keywords:

Crassostrea virginica Panopeus herbstii foraging behaviour ocean acidification predation predator–prey

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Assessing Intertidal Populations of the Invasive European Green Crab

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Published on: September 16, 2020

Area of Science:

Marine Biology
Chemical Oceanography
Ecology

Background:

Anthropogenic carbon dioxide (CO2) emissions cause ocean acidification.
Ocean acidification affects marine invertebrate calcification and predation susceptibility.
Acidification may impair organisms' ability to process environmental cues, complicating predictions of species interactions.

Purpose of the Study:

To investigate the effects of ocean acidification on the consumptive and behavioral interactions between mud crabs (Panopeus herbstii) and oysters (Crassostrea virginica).

Main Methods:

Oysters were reared with and without caged mud crabs for 71 days under three different partial pressures of carbon dioxide (pCO2) levels.
Subsequent predation trials were conducted to assess the impact of acidification on crab foraging behavior and prey consumption.

Main Results:

Ocean acidification significantly reduced prey consumption, handling time, and the duration of unsuccessful predation attempts by mud crabs.
These negative impacts on crab foraging behavior counteracted any potential benefits from reduced oyster calcification rates.

Conclusions:

Ocean acidification's effects on marine food webs are complex, involving impacts on both calcification and animal behavior.
Future assessments of acidification's ecological consequences must quantify effects on both physiological processes and behavioral responses.