An otolith-based back-calculation method to account for time-varying growth rate in rainbow smelt (Osmerus mordax) larvae
An otolith-based back-calculation method to account for time-varying growth rate in rainbow smelt (Osmerus mordax) larvae
复制标题
一种基于耳石的反算方法来解释彩虹胡瓜鱼（Osmerus mordax）幼虫随时间变化的生长速率
DOI：
10.1139/f98-170
复制
发表时间：
1998
影响因子：
2.4
通讯作者：
J. Dodson
中科院分区：
文献类型：
--
作者：
P. Sirois;F. Lecomte;J. Dodson
本研究开发了一种新的反算方法，基于彩虹胡瓜（Osmerus mordax）的幼虫，考虑到随时间的增长率的变化。已知年龄的幼虫饲养在四个60-L的缩影在49天，以获得大范围的个人的生长轨迹。我们首先验证了耳石增量沉积速率的每日性质。建议的时变增长（TVG）方法的权重的贡献，每个增量的长度计算使用的增长效应因子。小的生长增量对幼虫体长增长的贡献小于其在总耳石生长中的相对重要性。另一方面，一个大的增长增量贡献更大的长度增长的幼虫相比，它在总耳石生长的相对重要性。在个体水平上，该方法提供了比生物截距（BI）方法更好的先前年龄时身长估计值。此外，在群体水平上，TVG法倾向于比BI法提供更准确的先前年龄长度估计值，但差异不显著。使用TVG方法而不是BI方法来反算个体和种群增长轨迹的重要性随着增长效应的大小和增长率随时间的变化而增加。本文介绍了一种新的计算双拍子变化的倒算方法
This study develops a new back-calculation method, based on the larvae of rainbow smelt (Osmerus mordax), that takes into account the variation of growth rate over time. Known-aged larvae were reared in four 60-L microcosms during 49 days in order to obtain a large range of individual growth trajectories. We first validated the daily nature of the otolith increment deposition rate. The proposed time-varying growth (TVG) method weights the contribution of each increment in the length calculation using a growth effect factor. A small growth increment contributes less to the length increase of larvae than its relative importance in total otolith growth. On the other hand, a large growth increment contributes more to the length increase of larvae in comparison with its relative importance in total otolith growth. This method provided significantly better estimates of previous length-at-age than the biological intercept (BI) method at the individual level. In addition, the TVG method tended to provide more accurate estimates of previous length-at-age than the BI method at the population level, but the difference was not significant. The importance of using the TVG method instead of the BI method to back-calculate individual and population growth trajectories increases with the magnitude of the growth effect and the variation in growth rates over time. Resume : Cette etude presente une nouvelle methode de retrocalcul qui tient compte des variations temporelles du taux