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Free Content Water pumping and particulate resuspension by callianassids (Crustacea: Thalassinidea) at Enewetak and Bikini Atolls, Marshall Islands

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Water pumping activities of callianassids at depths of 18 m resuspended fine sediments in ejected water. Water volumes pumped daily averaged 1,120 ml at Enewetak and 2,250 ml at Bikini per mound, the difference perhaps attributable to difficulties with the collectors. Water volumes as great as 3,450 ml were produced daily. The suspended sediment load of water pumped through burrow systems averaged 3.1–3.3 times that found in controls taken 10 cm above the sediment surface. Material resuspended through callianassid pumping had generally higher gross alpha plus beta activity per unit weight than controls.

The high densities of burrows and lengthy residence times of deep lagoon water imply callianassids make a major contribution to total suspended particulates and radionuclides.

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Document Type: Research Article

Publication date: 1986-01-01

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