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首页> 外文期刊>Marine biology >Skeletal ossicles in echinoids are unreliable chronometers: Comment on 'Population dynamics of Strongylocentrotus droebachiensis in kelp forests and barren grounds in Norway' (Fagerli et al. 2015)
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Skeletal ossicles in echinoids are unreliable chronometers: Comment on 'Population dynamics of Strongylocentrotus droebachiensis in kelp forests and barren grounds in Norway' (Fagerli et al. 2015)

机译：类固醇的骨骼小骨是不可靠的计时码表：评“挪威海带森林和贫瘠土地上的Strongylocentrotus droebachiensis种群动态”（Fagerli等，2015）

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摘要

Sea urchins are important drivers of nearshore benthic communities. Understanding their critical life history characteristics such as age structure and mortality requires accurate and reliable estimates of growth. The green sea urchin, Strongylocentrotus droebachiensis, occurs on both sides of the northern Pacific and Atlantic oceans and can play a key role in stable state shifts from urchin barrens to kelp bed communities. A recent study of these systems in Norway used growth zones, or bands, in the skeletal ossicles (interambulacral plates) of green urchins as chronometers-estimators of age. Combined with measures of size, the age estimates were used to construct growth curves, population age structures, and estimates of site-specific mortality. However, there is much confusion surrounding the aging technique in regard to skeletal growth, ossicle selection, and misinterpretations of previous validation studies. Our comment clarifies these issues using data from the Norway study and two published validation studies. In addition, we provide criteria for assessing whether sea urchin ossicles are accurate and valid chronometers. Given the limited understanding of endogenous and exogenous causes of different types of bands, ontogenetic variation, intra-and interspecific variation, and a paucity of detailed information about their chemical composition, at least at this time, bands should not be used to determine age in sea urchins.
机译：海胆是近岸底栖生物群落的重要驱动力。要了解他们的关键生活史特征（例如年龄结构和死亡率），需要准确而可靠的增长估算。绿海胆（Strongylocentrotus droebachiensis）产于北太平洋和大西洋的两岸，在稳定状态从海胆贫瘠向海藻床群落转变中起着关键作用。挪威最近对这些系统的研究使用绿色小顽童的骨骼小骨（椎间盘中）的生长带或带作为年龄的计时器估算器。结合大小测量，使用年龄估计值来构建生长曲线，人口年龄结构和特定地点的死亡率估计值。但是，老化技术在骨骼生长，听骨选择和先前验证研究的误解方面存在很多困惑。我们的评论使用来自挪威研究的数据和两个已发表的验证研究澄清了这些问题。此外，我们提供了评估海胆小骨是否正确和有效的计时器的标准。鉴于对不同类型条带的内源性和外源性原因，个体发生的变异，种内和种间变异以及有关其化学成分的详细信息的了解有限，至少在目前，不应使用条带确定年龄。海胆。

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