Mouritsen K N
Department of Marine Ecology, Institute of Biological Sciences, University of Aarhus, Finlandsgade 14, 8200 Aarhus N, Denmark.
J Helminthol. 2002 Dec;76(4):349-53. doi: 10.1079/JOH2002137.
The release of Maritrema subdolum cercariae (Digenea: Microphallidae) from the marine mud snail Hydrobia ulvae is significantly affected by temperature, salinity, light and exudates from the second intermediate amphipod host. Based on (i) previously published data on temperature-salinity dependent H. ulvae activity, (ii) new experimental data on H. ulvae activity in light and darkness as well as in the presence and absence of host exudates, and (iii) the cercarial emergence rate from free moving snails and snails prevented from crawling, the present analysis indicates that emergence of M. subdolum larvae is regulated mainly by host activity as the ultimate factor for release. The adaptive significance of such an emergence strategy is emphasized.
来自海生泥螺乌尔维膀胱螺（Hydrobia ulvae）的亚隐微睾吸虫尾蚴（复殖目：微茎科）的释放受到温度、盐度、光照以及第二中间宿主端足类动物的分泌物的显著影响。基于（i）先前发表的关于温度 - 盐度依赖的乌尔维膀胱螺活动的数据，（ii）关于乌尔维膀胱螺在光照和黑暗以及有无宿主分泌物情况下活动的新实验数据，以及（iii）自由活动的螺和被阻止爬行的螺的尾蚴逸出率，目前的分析表明，亚隐微睾吸虫幼虫的逸出主要受宿主活动调节，宿主活动是释放的最终因素。强调了这种逸出策略的适应性意义。
