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首页> 外文期刊>ICES Journal of Marine Science >Highlighting growth regulation processes in fish populations by a simplex simulation approach: application to Merluccius hubbsi stocks in the Southwestern Atlantic
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Highlighting growth regulation processes in fish populations by a simplex simulation approach: application to Merluccius hubbsi stocks in the Southwestern Atlantic

机译：通过Simplex仿真方法突出了鱼群中的生长调节过程：应用于大西洋西南部的Merluccius Hubbsi股票

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摘要

A new simplex-based simulation approach (Spx) was developed to highlight multidirectional and multi-scale relationships between morphometric variables helping to functionally differentiate biological (fish) groups for better stocks definition and monitoring. Application concerned Merluccius hubbsi sampled in 1968-1972 and 2004 in six Southwestern Atlantic areas. Simulation results highlighted negative trends opposing front to back compartments indicating competition for body biomass distribution. However, top and bottom parts within these compartments were positively correlated indicating cooperative processes in favour of target local growth regulation. Positive and negative trends of growth regulation were also highlighted at lower body scale, notably between smaller components constituting body front compartment. On a geographical scale, average regulation levels of same morphometric variables showed monotonic or alternated variations between successive fish groups. This highlighted target and modulated growth regulations governing biomass distribution in different body parts by geographical-dependent ways. Under dynamical aspect (1968-1972 vs. 2004), growth regulation of mouth tended to increase with time leading to conclude on morphometric responses of M. hubbsi to overfishing pressure. Spx results were confirmed by several traditional approaches which showed less integrative aspect.
机译：开发了一种新的基于Simplex的仿真方法（SPX），以突出各个变量之间的多向和多尺度关系，有助于功能区分生物（鱼类）组以获得更好的股票定义和监测。应用有关Merluccius Hubbsi在1968年至1972年和2004年在六个西南大西洋地区进行了取样。仿真结果突出了反对后面的负面趋势，表明体生物质分布竞争。然而，这些隔室内的顶部和底部呈正相关，表明有利于靶局部生长调节的协同过程。成长调节的正趋势也以较低的体积突出显示，特别是在构成身体前舱的较小部件之间。在地理规模上，相同的形态变量的平均调节水平在连续的鱼群之间显示单调或交替变化。通过地理依赖方式，这种突出显示了不同身体部位的生物量分布的目标和调制增长规定。在动态方面（1968-1972与2004），口腔的生长调节随着时间的推移而增加，导致M. Hubbsi的形态学反应进行了过度捕捞压力。通过几种传统方法证实了SPX结果，该方法表现出较不综合的方面。

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