Swimming speeds of oyster larvaeCrassostrea virginica in different salinities and temperatures |
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Authors: | Herbert Hidu Harold H Haskin |
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Institution: | 1. New Jersey Oyster Research Laboratory, Rutgers University, New Brunswick, New Jersey
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Abstract: | Swimming speeds of oyster larvaeCrassostrea virginica were determined in constant and increasing salinities to learn more about the oyster larval “salinity response”. “Normal” non-directed swimming speeds ranged from less than 1 cm/min for early veligers to 5 cm/min for “eyed” veligers with temperature an important variable. When subjected to hourly salinity increases of 0.5‰, most larvae swam upward or downward at approximately 3 times the above speeds. Larvae with values closed in response to traces of formalin sank at speeds of 5 to 50 cm/min depending on larval stage. The results may explain the differential vertical position of larval stages in estuaries and suggest the presence of a taxic component to the salinity response. |
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