||Direct Measurement Technique for Determining Ventilation Rate in the Deposit Feeding Clam 'Macoma nasuta' (Bivalvia, Tellinaceae).
Specht, D. T. ;
Lee, H. ;
||Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center.
Water pollution ;
Yaquina Bay ;
Experimental data ;
Water flux ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||An exposure chamber, the 'clambox', was developed to measure ventilation rate, sediment processing rate, and efficiency of pollutant uptake by Macoma nasuta, Conrad, a surfacedeposit-feeding clam. Clams, collected from Yaquina Bay, Oregon, USA, were cemented into a hole in a piece of rubber dental dam so that the inhalant siphons were separated by a membrane. The dental dam was then clamped between two glass chambers. The inhalant and exhalant siphons were thus diirected into separate chambersof the device so that the amount of water or feces discharged into the exhalant camber provided direct measure ventilation rate and sediment processing rate, respectively. The shor-term pattern was for ventilation to be intermittently interrupted, essentially ceasing for 12 to 120 min, followed by a short period of active ventilation and thhen a resumption of the normal rate.
||Pub. in Marine Biology, v101 p211-218 1989.
|NTIS Title Notes
||PC A02/MF A01