Rationalizing ex situ collection of reproductive materials for endangered livestock breed conservation
Rationalizing ex situ collection of reproductive materials for endangered livestock breed conservation
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DOI：
10.1016/j.ecolecon.2020.106916
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发表时间：
2021-03-01
影响因子：
7
通讯作者：
Moran, Dominic
中科院分区：
文献类型：
--
作者：
Silva, Rafael De Oliveira;Cortes Gardyn, Oscar;Moran, Dominic
遗传和生殖材料异地储存的改进为濒危活体种群的保存提供了一种替代方案，但应以具有成本效益的方式优化采集，以避免重复，并参考原位种群的可持续性。我们开发了一个多阶段机会约束优化模型，以使西班牙濒临灭绝的濒危牲畜品种的收集合理化。该模型通过确定最低成本的最佳收集地点、时间和材料数量(精液剂量)来配置收集。一个定义“可接受风险水平”的决策变量允许决策者在做出异地采集和储存决策时，指定可容忍的就地物种濒危水平。使用来自18个基因库的数据，我们演示了如何使收集合理化，并得出了2018年至2060年期间边际迁地收集成本与可接受的原位灭绝概率之间的成本曲线。该模型框架可在寻求在有限的保护预算和不确定的原址灭绝风险下使迁地收藏合理化的国家复制。
Improvements in ex situ storage of genetic and reproductive materials offer an alternative for endangered live-stock breed conservation, but collections should be optimized cost-effectively to avoid duplication, and with reference to the sustainability of in situ breeds. We developed a multi-period chance-constrained optimization model to rationalize collections of endangered livestock breeds at risk of in situ extinction in Spain. The model configures collections by determining the least-cost optimal collection locations, timing and material quantities (semen doses). A decision variable defining an "acceptable level of risk" allows decision makers to specify tolerable levels of in situ breed endangerment when taking ex situ collection and storage decisions. Using data from 18 gene banks we demonstrate how collections can be rationalized, and derive cost curves relating marginal ex situ collection cost and accepted probability of in situ extinction covering the period 2018 to 2060. The modelling framework can be replicated in countries seeking to rationalize ex situ collections under limited conservation budgets and uncertain in situ extinction risks.