カイアシ類に寄生されたウノアシPatelloida saccharina lanx Reeve出現の季節変化と地域的差異

抄録

The intertidal limpet Patelloida saccharina lanx from the coast of the Boso Peninsula, central Japan, is infected with an undescribed species of the copepod family Ventriculinidae or a related family. Large regional and seasonal variations in prevalence of the parasite were evident between the nine localities studied (up to 70.2%, mean=36.2%). Even within a small area, prevalence varied greatly. Since parasitic copepods may have negative effects on their growth and reproduction of the benthic hosts, a population study covering the whole life cycle of the limpet should be conducted to understand the effects of the parasite on the limpet.