Abstract Digital camera monitoring is increasingly being used to monitor recreational fisheries. The manual interpretation of video imagery can be costly and time consuming. In an a posteriori analysis, we investigated trade-offs between the reading cost and accuracy measures of estimates of boat retrievals obtained at various sampling proportions for low, moderate and high traffic boat ramps in Western Australia. Simple random sampling, systematic sampling and stratified sampling designs with proportional and weighted allocation were evaluated to assess trade-offs in terms of bias, accuracy, precision, coverage rate and cost in estimating the annual total number of powerboat retrievals in 10,000 jackknife resampling draws. The relative standard error (RSE ± standard deviations) obtained by the sampling designs for sampling proportions from 0.4 onwards were below a 20 % threshold for three of the sampling designs across the three boat ramps. Coverage rates of over 90 % were observed for the confidence intervals for the estimated annual number of powerboat retrievals, with low relative standard errors (RSE

中文翻译：

---

用于休闲划船努力的数码相机监控的读取成本和准确性措施之间的权衡评估

摘要 数码相机监控越来越多地用于监控休闲渔业。视频图像的人工解释可能既费钱又费时。在后验分析中，我们调查了在西澳大利亚州低、中和高交通船坡道以不同采样比例获得的船只检索估计值的读取成本和准确性度量之间的权衡。对具有比例和加权分配的简单随机抽样、系统抽样和分层抽样设计进行了评估，以评估在估计 10,000 次折刀重采样中每年机动船检索总数的偏差、准确性、精确度、覆盖率和成本方面的权衡。通过从 0 开始的抽样比例的抽样设计获得的相对标准误差（RSE ± 标准偏差）。对于跨越三个船舷梯的三个抽样设计，从 4 起低于 20% 的阈值。观察到估计年度摩托艇检索次数的置信区间的覆盖率超过 90%，相对标准误差 (RSE)