TY - JOUR
T1 - Clearance rates in the Arctic bivalves Hiatella arctica and Mya sp
AU - Petersen, J.K.
AU - Sejr, M.K.
AU - Larsen, Jens Erik Nybo
N1 - KeyWords Plus: ASCIDIAN CIONA-INTESTINALIS; NORTHEAST GREENLAND; BEAT FREQUENCY; YOUNG SOUND; TEMPERATURE; FILTRATION; ENERGETICS; GROWTH; CILIA; FJORD
PY - 2003
Y1 - 2003
N2 - Filtration was studied in two Arctic clams, Hiatella arctica and Mya sp., collected in Young Sound, Northeast Greenland. Clearance rates were determined as a function of ambient temperature and algal cell concentration, using the clearance method and feeding with a unicellular flagellate. For both species, clearance rates increased with increasing temperature from < -1 up to 4-8degreesC. At higher temperatures, filtration ceased and the clams closed their valves. Clearance rates were also determined in temperate specimens of H. arctica collected on the west coast of Sweden. For these specimens, clearance rates increased with increasing temperature from 0 to 18-20degreesC. When weight-specific clearance rates were compared between the two populations and between species, there were no differences at 1degreesC. Clearance rates in Arctic H. arctica were maximal at algal cell concentrations corresponding to 2.5-8 mug chlorophyll a 1(-l). Temperature compensation in Arctic bivalves is discussed and it is concluded that adaptations to constant low temperatures consist of a lower minimum temperature, for active filtration. Low clearance rates due to low temperatures did not seem to limit growth, under the prevailing conditions in Young Sound
AB - Filtration was studied in two Arctic clams, Hiatella arctica and Mya sp., collected in Young Sound, Northeast Greenland. Clearance rates were determined as a function of ambient temperature and algal cell concentration, using the clearance method and feeding with a unicellular flagellate. For both species, clearance rates increased with increasing temperature from < -1 up to 4-8degreesC. At higher temperatures, filtration ceased and the clams closed their valves. Clearance rates were also determined in temperate specimens of H. arctica collected on the west coast of Sweden. For these specimens, clearance rates increased with increasing temperature from 0 to 18-20degreesC. When weight-specific clearance rates were compared between the two populations and between species, there were no differences at 1degreesC. Clearance rates in Arctic H. arctica were maximal at algal cell concentrations corresponding to 2.5-8 mug chlorophyll a 1(-l). Temperature compensation in Arctic bivalves is discussed and it is concluded that adaptations to constant low temperatures consist of a lower minimum temperature, for active filtration. Low clearance rates due to low temperatures did not seem to limit growth, under the prevailing conditions in Young Sound
U2 - 10.1007/s00300-003-0483-2
DO - 10.1007/s00300-003-0483-2
M3 - Journal article
SN - 0722-4060
VL - 26
SP - 334
EP - 341
JO - Polar Biology
JF - Polar Biology
IS - 5
ER -