Translocation is an increasingly used tool in conservation management, but there is a risk that source populations are overcollected. The risk depends critically on the detection probability and the source population size. We quantified this risk for a wingless grasshopper population in a patch of remnant habitat in suburban Melbourne that was condemned to be cleared for housing development. We collected ∼2000 grasshoppers in five samples spread over 1 month and used the results to estimate the initial population size (∼3400) with high confidence. Despite our perception of substantially depleting the population, we removed only an estimated 60%, and this relatively high fecundity (∼50 eggs per lifetime) annual species had recovered by the following year to near its original density. Wild-to-wild translocation is likely to be a low-cost and effective strategy in the conservation of many invertebrates, and our findings highlight the feasibility of using natural source populations.

中文翻译：

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过度收集易地有什么风险？对无翅蚱蜢的机会主义评估

易地是保护管理中越来越多使用的工具，但存在源种群被过度收集的风险。风险主要取决于检测概率和源群体规模。我们量化了墨尔本郊区一片残余栖息地中无翅蚱蜢种群的风险，该地区因住房开发而被清理。我们在 1 个月内的五个样本中收集了约 2000 只蚱蜢，并使用结果以高置信度估计初始种群规模（约 3400 只）。尽管我们认为种群数量会大幅减少，但我们只清除了大约 60% 的种群，而这种繁殖力相对较高（一生产 50 个卵）的一年生物种到了第二年就已恢复到接近其原始密度。野生到野生的易位可能是保护许多无脊椎动物的一种低成本且有效的策略，我们的研究结果强调了使用自然来源种群的可行性。