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The Influence of Mark-Recapture Sampling Effort on Estimates of Rock Lobster Survival

机译：标记重获采样工作量对岩石龙虾成活估计值的影响

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Five annual capture-mark-recapture surveys on Jasus edwardsii were used to evaluate the effect of sample size and fishing effort on the precision of estimated survival probability. Datasets of different numbers of individual lobsters (ranging from 200 to 1,000 lobsters) were created by random subsampling from each annual survey. This process of random subsampling was also used to create 12 datasets of different levels of effort based on three levels of the number of traps (15, 30 and 50 traps per day) and four levels of the number of sampling-days (2, 4, 6 and 7 days). The most parsimonious Cormack-Jolly-Seber (CJS) model for estimating survival probability shifted from a constant model towards sex-dependent models with increasing sample size and effort. A sample of 500 lobsters or 50 traps used on four consecutive sampling-days was required for obtaining precise survival estimations for males and females, separately. Reduced sampling effort of 30 traps over four sampling days was sufficient if a survival estimate for both sexes combined was sufficient for management of the fishery.
机译：进行了5次年度对Jasus edwardsii的捕获标记回收的调查，以评估样本量和捕捞努力对估计生存概率的精度的影响。通过对每个年度调查进行随机子采样，创建了不同数量的单个龙虾（范围为200至1,000个龙虾）的数据集。此随机子采样过程还用于基于陷阱数量的三个级别（每天15、30和50个陷阱）和四个采样天数的级别（2、4）创建12个不同工作量的数据集，6天和7天）。随着样本量和工作量的增加，用于估算生存概率的最简约的Cormack-Jolly-Seber（CJS）模型已从恒定模型转变为基于性别的模型。需要分别在四个连续的采样日中使用500个龙虾或50个陷阱的样本来分别获得男性和女性的精确生存估计。如果两性结合的生存估计足以管理渔业，则在四个采样日内减少30个捕捞器的采样工作就足够了。

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