Effect of Short-Term Temperature Change on Cercarial Release by Rhipidocotyle fennica (Trematoda, Bucephalidae) from the Freshwater Bivalve Host, Anodonta anatina
Choo, J., & Taskinen, J. (2015). Effect of Short-Term Temperature Change on Cercarial Release by Rhipidocotyle fennica (Trematoda, Bucephalidae) from the Freshwater Bivalve Host, Anodonta anatina. Ecological Parasitology and Immunology, 4, Article 235932. https://doi.org/10.4303/epi/235932
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Ecological Parasitology and ImmunologyDate
2015Copyright
© 2015 Jocelyn M. Choo and Jouni Taskinen. This is an open access article distributed under the terms of the Creative Commons Attribution License.
Cercarial release from the first intermediate host is an
important stage in the transmission of trematode parasites. Besides
long-term (seasonal) temperature fluctuations, short-term temperature
changes can also influence cercarial emergence. We tested the response
of the bucephalid trematode, Rhipidocotyle fennica (R. fennica),
acclimatized to 17 °C, to an abrupt temperature change. As the
natural cercarial shedding by this parasite takes place annually during
the warmest season, we expected a positive effect of temperature
increase. Monitoring during one hour after the transfer from 17 °C to
20 °C revealed a significant increase in R. fennica cercarial release
compared to the preceding one hour period. In contrast, cercarial
release decreased in clams transferred to 14 °C, while no change
was observed in control clams transferred from 17 °C to 17 °C. This
shows that the cercarial release by R. fennica is sensitive to short-term
temperature change, and, as predicted, responds positively to warming
and negatively to cooling. The result emphasizes the importance of
(i) temperature on the cercarial production of trematodes, and (ii) the
need to carefully control temperature conditions when studying factors
influencing the cercarial production of trematodes.
...
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Except where otherwise noted, this item's license is described as © 2015 Jocelyn M. Choo and Jouni Taskinen. This is an open access article distributed under the terms of the Creative Commons Attribution License.
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