Effects of settler size and density on early post-settlement survival of Ciona intestinalis in the field
Effects of settler size and density on early post-settlement survival of Ciona intestinalis in the field
复制标题
沉降器尺寸和密度对海鞘在田间沉降后早期存活的影响
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
M. Keough
中科院分区：
文献类型：
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作者：
D. Marshall;M. Keough
幼体质量的变化对海洋无脊椎动物变质后的表现的影响越来越明显。最近，研究表明，后代大小的变化也会强烈影响定居后的生存，但环境条件的变化可以调解这种影响。海洋无脊椎动物幼虫定居的栖息地的质量可以显着变化，1对质量的影响是存在的同种数量。我们测试了定居者的大小和定居者密度的影响早期（1周后解决）后解决生存在外地的孤独海鞘玻璃海鞘。较大的定居者比较小的定居者生存得更好，在兄弟姐妹群体内部和之间。定居者密度的增加降低了生存率，但密度依赖效应对较小定居者的影响要强得多。我们认为，较大的定居者能够更好地科普种内竞争，因为他们有更大的能量储备或更大的能力比较小的定居者饲料。
Effects of variation in larval quality on post-metamorphic performance in marine invertebrates are increasingly apparent. Recently, it has been shown that variation in offspring size can also strongly affect post-settlement survival, but variation in environmental conditions can mediate this effect. The quality of habitat into which marine invertebrate larvae settle can vary markedly, and 1 influence on quality is the number of conspecifics present. We tested the effects of settler size and settler density on early (1 wk after settlement) post-settlement survival in the field for the solitary ascidian Ciona intestinalis. Larger settlers survived better than smaller settlers, within and among groups of siblings. Increases in the density of settlers decreased survival, but the density-dependent effects were much stronger for smaller settlers. We suggest that larger settlers are better able to cope with intra-specific competition because they have greater energetic reserves or a greater capacity to feed than smaller settlers.