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Tolerance to salinity and thermal stress by larvae and adults of the serpulid annelid Ficopomatus enigmaticus
Invertebrate Biology ( IF 1.2 ) Pub Date : 2019-11-12 , DOI: 10.1111/ivb.12271
Jessica Peria 1 , Bruno Pernet 1
Affiliation  

The serpulid annelid Ficopomatus enigmaticus is a widely distributed invader of shallow‐water, brackish habitats in subtropical and temperate regions, where it has numerous damaging ecological and economic effects. Its distributional pattern suggests that temperature and salinity play important roles in limiting its distribution, but because other factors often covary with these, drawing strong conclusions from these patterns is difficult. In an effort to more clearly identify the effects of these factors, we examined tolerance to acute thermal (16–28°C) and salinity (0–35 psu) stress by larvae (5‐day exposure, unfed) and adults (14‐day exposure, unfed) of F. enigmaticus in the laboratory experiments. Larvae showed higher mortality at the highest temperature tested 28°C; adult survival was unaffected by temperature. Neither larvae nor adults survived exposure to pure freshwater (0 psu), but survived well at salinities ranging 3.5–35 psu. In addition, high salinity did not slow tube growth in adults. These results suggest that salinity stress, in particular, does not directly limit the distribution of F. enigmaticus to low‐salinity habitats. Experimental work on the distribution of F. enigmaticus is uncommon in the literature, but is likely needed to identify the abiotic or biotic factors that limit the distribution of this frequently invasive species.

中文翻译:

环节动物 Ficopomatus enigmaticus 的幼虫和成虫对盐度和热应激的耐受性

环节动物 Ficopomatus enigmaticus 是一种广泛分布于亚热带和温带浅水、微咸栖息地的入侵者,在那里它具有许多破坏性的生态和经济影响。它的分布模式表明温度和盐度在限制其分布方面起着重要作用,但由于其他因素通常与这些因素共变,因此很难从这些模式中得出强有力的结论。为了更清楚地确定这些因素的影响,我们检查了幼虫(暴露 5 天,未喂食)和成虫(14- F. enigmaticus 在实验室实验中的白天暴露,未喂食)。幼虫在测试的最高温度 28°C 下表现出更高的死亡率;成虫存活率不受温度影响。幼虫和成虫都无法在纯淡水 (0 psu) 中存活下来,但在 3.5-35 psu 的盐度下仍能很好地存活。此外,高盐度不会减缓成年人的管生长。这些结果表明盐分胁迫并没有直接限制 F. enigmaticus 向低盐度栖息地的分布。关于 F. enigmaticus 分布的实验工作在文献中并不常见,但可能需要确定限制这种频繁入侵物种分布的非生物或生物因素。
更新日期:2019-11-12
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