Supporting Code for: An approach to defining a Sacramento River Fall Chinook escapement objective considering natural production, hatcheries, and risk tolerance

Supporting code and input data for: An approach to defining a Sacramento River Fall Chinook escapement objective considering natural production, hatcheries, and risk tolerance. I offer a modeling framework for integrating consideration of established hatchery spawning goals, natural-area production or habitat capacities measured at varying spatial scales, and policy decisions about what fraction of potential natural production is desired and risk tolerance. The model allows evaluating how likely a potential escapement goal (measured at the currently-used scale of fall run adults returning to both hatcheries and natural areas throughout the Sacramento Basin) is to both meet hatchery goals and to produce at least a specified fraction of potential natural production.本数据集配套代码与输入数据服务于下述研究：《考虑自然繁育、孵化场与风险耐受度的萨克拉门托河秋季奇努克鲑产卵逃逸目标（escapement objective）设定方法》。本研究提出一套整合建模框架，可综合考量既定孵化场产卵目标、不同空间尺度下测算的自然区域繁育量或生境承载力，以及围绕"期望潜在自然繁育占比与风险耐受度"作出的政策决策。该模型可用于评估某一潜在产卵逃逸目标（以当前通用的、统计萨克拉门托全流域内洄至孵化场与自然区域的秋季洄游成体的规模标准测算）同时达成孵化场目标、并实现至少指定比例潜在自然繁育的可能性。