Disturbance, emigration, and refugia: How the mud snail, Ilyanassa obsoleta (Say), affects the habitat distribution of an epifaunal amphipod, Microdeutopus gryllotalpa (Costa)☆

@inproceedings{Dewitt1985DisturbanceEA,
  title={Disturbance, emigration, and refugia: How the mud snail, Ilyanassa obsoleta (Say), affects the habitat distribution of an epifaunal amphipod, Microdeutopus gryllotalpa (Costa)☆},
  author={Theodore H. Dewitt and Jeffrey S. Levinton},
  year={1985}
}
In the presence of the mud snail Ilyanassa obsoleta (Say), the tubicolous amphipod Microdeutopus gryllotalpa (Costa) emigrates to snail-free sediments, as demonstrated in laboratory and field experiments. Emigration occurs predominantly in the dark when the amphipod is most active. Unlike crevices, the thickness of sediments in which the amphipod is established offers no protection from snail disturbance. Emigration is shown to be caused by the disturbance generated by the snail's plowing and… CONTINUE READING

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