1. Many freshwater crayfish are threatened with extinction owing to varied threats such as urban development, pollution, over‐harvest, and climate change, as well as invasive species.
2. A recently published manuscript in Aquatic Conservation: Marine and Freshwater Ecosystems described a stochastic, age‐based population model for the large freshwater crayfish Murray crayfish, Euastacus armatus, which is now threatened across much of its range in the Murray–Darling Basin in south‐eastern Australia.
3. The model was constructed for three regional populations using the best available knowledge of life‐history traits such as longevity, size at onset of sexual maturity, fecundity, and survival, along with an account of density dependence. The model provides a framework to explore aspects of the conservation and management of the species, including assessing the influence of recreational harvest and environmental disturbance such as hypoxic blackwater, which affected the species significantly in 2010–2011.
4. The application of the model provided retrospective justification for regulation amendments and highlighted biologically realistic timeframes for the recovery of impaired populations. This knowledge has assisted multi‐jurisdictional fisheries management agencies to undertake routine reviews of fishery regulations, as well as to inform stakeholders of the benefits of the regulation amendments.
5. Refinement of the modelling framework has already provided additional insight and it is anticipated that future application will help to address other important management questions. The modelling outcomes are at present informing conservation assessment of the species under the Australian Government's Environmental Protection and Biodiversity Conservation Act 1999.
6. The benefit of the population model can be summarized as: providing a framework to inform and justify management decisions; enabling additional research; and guiding conservation assessment. This has strengthened strong partnerships (between ecologists, managers, and recreational fishers) required to manage the species effectively.

中文翻译：

---

种群模型为管理决策提供支持，使正在进行的研究成为可能，并加强牢固的伙伴关系来管理受威胁的淡水小龙虾

1. 由于城市发展，污染，过度收获和气候变化以及入侵物种等各种威胁，许多淡水小龙虾面临灭绝的威胁。
2. 在最近出版的手稿水产保护：海洋和淡水生态系统中描述的随机，基于年龄的人口模式，为大型淡水小龙虾小龙虾穆雷，Euastacus armatus，这是目前在向南跨越威胁了它的墨累-达令流域范围澳大利亚东部。
3. 该模型是根据三个生命周期特征（如寿命，性成熟时的体型大小，生殖力和存活率）的最佳可用知识以及对密度的依赖性，针对三个区域人口构建的。该模型提供了探索物种保护和管理方面的框架，包括评估休闲收获和低氧黑水等环境干扰的影响，这些影响在2010-2011年对物种产生了重大影响。
4. 该模型的应用为法规修订提供了追溯依据，并着重指出了恢复受损人群的生物学现实时间表。这些知识有助于跨辖区的渔业管理机构对渔业法规进行例行审查，并告知利益相关者法规修订的好处。
5. 建模框架的完善已经提供了更多的见解，并且预计将来的应用将有助于解决其他重要的管理问题。根据澳大利亚政府的《 1999年环境保护和生物多样性保护法》，目前的建模结果正在为该物种的保护评估提供信息。
6. 人口模型的好处可概括为：提供一个框架，以告知和证明管理决策；进行更多研究；指导保护评估。这加强了有效管理该物种所需的牢固的伙伴关系（生态学家，管理者和休闲渔民之间）。