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Form and function in juvenile ascidians. Ⅰ. Implications of early juvenile morphologies for performance

机译:少年海鞘的形式和功能。 Ⅰ。早期少年形态对表现的影响

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摘要

Newly settled marine invertebrates are typically less than 1 mm tall and face physical and biotic factors distinct from those facing adults, including a fluid environment dominated by high viscosity and deep boundary layers, and a size-specific suite of predators and competitors. If juveniles have distinct morphologies from adults, or morphologies that function differently at small scales, these differences could have important implications for juvenile performance. We compared the ontogenetic scaling of morphological parameters related to suspension feeding in 6 species of ascidians covering a wide taxonomic range. Many aspects of early juvenile morphology differed from those of conspecific adults, though not invariably in ways likely to improve feeding performance at small size. Some juvenile morphologies that are detrimental to efficient suspension feeding may serve other functions, whereas others are the result of commencing suspension feeding before the completion of metamorphosis. Thus, not all ascidian species appear specialized for higher rates of suspension feeding and early growth.
机译:新近定居的海洋无脊椎动物通常身高不到1毫米,并且面临与成年人不同的物理和生物因素,包括以高粘度和深边界层为主的流体环境,以及特定大小的掠食者和竞争者。如果青少年的形态与成年人不同,或者在小规模上具有不同的形态,那么这些差异可能会对少年的表现产生重要影响。我们比较了涉及悬浮生物的形态学参数在6个种类广泛的生物分类学范围内的形态学标度。幼年早期形态的许多方面与同种成年的不同,尽管在改善小规格饲喂性能方面并非一成不变。一些不利于有效悬浮饲料的幼年形态可能起其他作用,而另一些则是在变态完成之前开始悬浮饲料的结果。因此,并非所有海鞘物种似乎都专门针对较高的悬浮饲料和早期生长。

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