Modelling of the nonlinear dynamics of pacific sockeye salmon

太平洋红鲑鱼非线性动力学建模

• 批准号: 188398916
• 负责人: Professorin Dr. Barbara Drossel
• 金额: --
• 依托单位: Arbeitsgruppe Theorie komplexer Systeme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/188398916?language=en
• 关键词: Modelling; nonlinear; dynamics; pacific; sockeye

The project shall use computational and analytical methods to investigate the nonlinear dynamics of sockeye salmon, including the interaction with their predators, their food source and their competitors. The periodic four-year oscillation of these fish has been found to be due to a “strong resonance”, and it is thus a generic phenomenon that may occur in populations with seasonal dynamics and a generation time between 4 and 5 years. In particular, the conditions shall be established under which the strong resonance, found in a three-species version of the model, occurs in even further simplified as well as in more comprehensive models. We will also investigate the influence of noise and the conditions for the occurrence of other attractors (fixed point, oscillation with period 2, quasiperiodic behavior). The influence of the fishing industry, of lake fertilization and of spawning channels on the dynamics of the salmon shall be studied. The results shall be compared with known field data.

该项目将使用计算和分析方法调查红鲑的非线性动态，包括与其捕食者、食物来源和竞争对手的相互作用。这些鱼的周期性四年振荡已被发现是由于“强共振”，因此这是一种普遍现象，可能发生在具有季节性动态和世代时间在4至5年之间的种群中。特别是，应建立的条件下，强共振，发现在一个三物种版本的模型，发生在更进一步简化以及在更全面的模型。我们还将研究噪声的影响和其他吸引子（不动点，周期为2的振荡，准周期行为）发生的条件。应研究捕鱼业、湖泊施肥和产卵渠道对鲑鱼动态的影响。结果应与已知的现场数据进行比较。

项目成果

Effect of introducing a competitor on cyclic dominance of sockeye salmon.

引入竞争者对红鲑鱼周期性优势的影响

• DOI: 10.1016/j.jtbi.2014.06.021
• 发表时间: 2014
• 期刊: Journal of theoretical biology
• 影响因子: 2
• 作者: CK Schmitt;C Guill;E Carmack;B Drossel
• 通讯作者: B Drossel

The effect of predator limitation on the dynamics of simple food chains

捕食者限制对简单食物链动力学的影响

• DOI: 10.1007/s12080-013-0204-6
• 发表时间: 2014
• 期刊: Theoretical Ecology
• 影响因子: 1.6
• 作者: CK Schmitt;S Schulz;J Braun;C Guill;B Drossel
• 通讯作者: B Drossel

The robustness of cyclic dominance under random fluctuations.

随机波动下循环优势的鲁棒性

• DOI: 10.1016/j.jtbi.2012.05.028
• 发表时间: 2012
• 期刊: Journal of theoretical biology
• 影响因子: 2
• 作者: CK Schmitt;C Guill;E Carmack;B Drossel
• 通讯作者: B Drossel

Exploring cyclic dominance of sockeye salmon with a predator–prey model

用捕食者猎物模型探索红鲑鱼的循环优势

• DOI: 10.1139/cjfas-2013-0441
• 发表时间: 2014
• 期刊: Canadian Journal of Fisheries and Aquatic Sciences
• 影响因子: 2.4
• 作者: C Guill;E Carmack;B Drossel
• 通讯作者: B Drossel

Single generation cycles and delayed feedback cycles are not separate phenomena.

单生成周期和延迟反馈周期不是独立的现象

• DOI: 10.1016/j.tpb.2014.10.003
• 发表时间: 2014
• 期刊: Theoretical population biology
• 影响因子: 1.4
• 作者: T Pfaff;A Brechtel;B Drossel;C Guill
• 通讯作者: C Guill