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Comparing on-site and off-site survey data to investigate survey biases in recreational fisheries data
ICES Journal of Marine Science ( IF 3.3 ) Pub Date : 2021-06-23 , DOI: 10.1093/icesjms/fsab131
Wolf-Christian Lewin 1 , Marc Simon Weltersbach 1 , Kevin Haase 1 , Carsten Riepe 1 , Christian Skov 2 , Casper Gundelund 2 , Harry V Strehlow 1
Affiliation  

Recreational fishing is increasingly included in fish stock assessments globally. Nonetheless, the extent and precision of recreational fisheries data are often limited. Common methods to collect those data are on-site and off-site surveys, both of which are prone to specific biases, whose magnitude is widely unknown. The present study compares data from an on-site access point intercept and a simultaneously conducted off-site diary survey, separately targeting charter boat, boat, and shore anglers in the German Baltic Sea recreational cod fishery to identify specific biases in the data sets. The analyses revealed indications of avidity and recall bias that might influence catch and release estimates. Catch rates and release rates differed substantially between the angling platforms. The catch and release rates of diarists and on-site anglers were in a similar range for every platform, and reasonably precise with standard errors between 0.1 and 0.4 fish per angler and day. Recreational fishing monitoring approaches should include complementary on-site surveys from time to time to control for biases whereby the angling platform should be taken into account. The low explanatory power of commonly collected socio-demographic variables indicated that variables capturing the heterogeneity of angler behaviour should additionally be included in future surveys.

中文翻译:

比较现场和非现场调查数据以调查休闲渔业数据中的调查偏差

休闲捕鱼越来越多地被纳入全球鱼类资源评估中。尽管如此,休闲渔业数据的范围和精度往往是有限的。收集这些数据的常用方法是现场和非现场调查,这两种方法都容易产生特定的偏差,其幅度是未知的。本研究比较了来自现场接入点拦截和同时进行的场外日记调查的数据,分别针对德国波罗的海休闲鳕鱼渔业中的包租船、船和岸上垂钓者,以确定数据集中的特定偏差。分析揭示了可能影响捕获和释放估计的贪婪和回忆偏差的迹象。钓鱼平台之间的捕获率和释放率差异很大。对于每个平台,日记作者和现场垂钓者的捕获率和释放率都在相似的范围内,并且相当精确,标准误差在每个垂钓者每天 0.1 到 0.4 条鱼之间。休闲捕鱼监测方法应包括不时的补充现场调查,以控制应考虑钓鱼平台的偏差。普遍收集的社会人口变量的解释力低表明,捕捉垂钓者行为异质性的变量应另外包括在未来的调查中。休闲捕鱼监测方法应包括不时的补充现场调查,以控制应考虑钓鱼平台的偏差。普遍收集的社会人口变量的解释力低表明,捕捉垂钓者行为异质性的变量应另外包括在未来的调查中。休闲捕鱼监测方法应包括不时的补充现场调查,以控制应考虑钓鱼平台的偏差。普遍收集的社会人口变量的解释力低表明,捕捉垂钓者行为异质性的变量应另外包括在未来的调查中。
更新日期:2021-06-23
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