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首页> 外文期刊>The Open Fish Science Journal >Assessing Options for Using a Continuous Underway Fish Egg Sampler toEnhance Dedicated Daily Egg Production Studies Conducted from SmallResearch Vessels
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Assessing Options for Using a Continuous Underway Fish Egg Sampler toEnhance Dedicated Daily Egg Production Studies Conducted from SmallResearch Vessels

机译：评估使用连续进行中的鱼卵采样器的选项，以增强由SmallResearch船只进行的每日专用产蛋研究

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This study was undertaken to identify options for using a Continuous Underway Fish Egg Sampler (CUFES) toenhance the application of the Daily Egg Production Method (DEPM) in situations where targeted surveys are conductedfrom small research vessels (e.g. <25m) and the time spent at each sampling site is short (e.g. <10 min). To do this, weconducted experiments to: 1) determine the reliability of information obtained from onboard examination of CUFESsamples; 2) assess the sampling efficiency of CUFES while on-site and underway and 3) measure the effectiveness ofunderway CUFES samples in predicting the presence/absence of sardine eggs in the following CalVET net sample. Wealso compared the accuracy, precision and costs of estimates of total daily egg production obtained using data obtainedfrom CalVET net samples taken at 1) predetermined sites (low and high sampling intensities) and 2) CUFES-determinedsites. The accuracy of onboard estimates of egg abundance appeared to be affected by sea conditions. The efficiency ofCUFES as an underway sampler was also lower when sea conditions were rough. Data from laboratory analyses ofunderway CUFES samples were a good predictor of egg abundance in the following CalVET net sample. Estimates oftotal egg production using CalVET samples from CUFES-determined sites based on laboratory analyses of CUFESsamples differed by less than 10% from those obtained from pre-determined sites. However, estimates based on onboardanalyses of CUFES samples differed from those obtained from pre-determined sites by up to 50%. When the time spenttaking each CalVET sample is low (e.g. less than 10 minutes), using data from CUFES to reduce the number of samplestaken using CalVET nets is not the optimal use of this technology. This is mainly because of difficulties associated withsorting plankton samples at sea, but also because in situations where the time spent at each site is short, the smalldecreases in field (cruise duration) and laboratory (sorting) costs do not outweigh the reductions in the reliability ofestimates of egg production. However, CUFES data does appear to provide a potentially important source of informationto increase the reliability of estimates of total daily egg production. Numerical techniques (e.g. analogous to integratedfishery assessment models) need to be developed to integrate data obtained from CUFES and CalVET nets to providemore accurate and precise estimates of total daily egg production for DEPM studies.
机译：进行这项研究的目的是确定使用连续航行鱼卵取样器（CUFES）的选项，以增强在小型研究船（例如<25m）进行有针对性的调查并花费时间的情况下每日产蛋方法（DEPM）的应用。每个采样点都很短（例如，<10分钟）。为此，我们进行了以下实验：1）确定从CUFES样本的机载检查获得的信息的可靠性; 2）在现场和进行中评估CUFES的采样效率，以及3）测量进行中的CUFES样品在预测以下CalVET净样品中是否存在沙丁鱼卵的有效性。我们还比较了使用从CalVET净样品获得的数据（在1个预定地点（低和高采样强度）和2个CUFES确定的地点）获取的数据得出的估计每日总产蛋量的准确性，准确性和成本。船上估计鸡蛋丰度的准确性似乎受到海况的影响。当海况恶劣时，CUFES作为进行中的采样器的效率也较低。来自进行中的CUFES样本的实验室分析数据很好地预测了以下CalVET净样本中的鸡蛋丰度。根据对CUFES样本的实验室分析，使用来自CUFES确定的地点的CalVET样本估算的总产蛋量与从预定地点获得的总产蛋量相差不到10％。但是，基于CUFES样本的车载分析得出的估计值与从预定地点获得的估计值相差最多50％。当花费每个CalVET样本的时间很短（例如少于10分钟）时，使用CUFES中的数据来减少使用CalVET网络获取的样本数并不是该技术的最佳使用。这主要是由于在海上对浮游生物样品进行分拣带来的困难，而且还因为在每个站点花费的时间都很短的情况下，田间（巡航持续时间）和实验室（分拣）成本的小幅下降不会超过可靠性下降的幅度。估计产蛋量。但是，CUFES数据的确似乎提供了潜在的重要信息来源，可提高每日总产蛋量估算的可靠性。需要开发数字技术（例如类似于综合渔业评估模型的方法）以整合从CUFES和CalVET网络获得的数据，以便为DEPM研究提供更精确的每日总产蛋量估算值。

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