气候变化领域集成服务门户(CCPortal): Literature review of elasmobranch bycatch and retention rate

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.844726
	Literature review of elasmobranch bycatch and retention rate
	James; Kelsey; Lewison; Rebecca; Dillingham; Peter; Curtis; Alexandra; Moore; Jeffrey
发布日期	2015-03-20
数据集类型	dataset
英文简介	To address growing concern over the effects of fisheries non-target catch on elasmobranchs worldwide, the accurate reporting of elasmobranch catch is essential. This requires data on a combination of measures, including reported landings, retained and discarded non-target catch, and post-discard survival. Identification of the factors influencing discard vs. retention is needed to improve catch estimates and to determine wasteful fishing practices. To do this we compared retention rates of elasmobranch non-target catch in a broad subset of fisheries throughout the world by taxon, fishing country, and gear. A regression tree and random forest analysis indicated that taxon was the most important determinant of retention in this dataset, but all three factors together explained 59% of the variance. Estimates of total elasmobranch removals were calculated by dividing the FAO global elasmobranch landings by average retention rates and suggest that total elasmobranch removals may exceed FAO reported landings by as much as 400%. This analysis is the first effort to directly characterize global drivers of discards for elasmobranch non-target catch. Our results highlight the importance of accurate quantification of retention and discard rates to improve assessments of the potential impacts of fisheries on these species.
空间范围	Median Latitude: 21.721672 * Median Longitude: -11.417492 * South-bound Latitude: -46.000000 * West-bound Longitude: -156.000000 * North-bound Latitude: 75.000000 * East-bound Longitude: 170.000000
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/217126
推荐引用方式 GB/T 7714	James,Kelsey,Lewison,et al. Literature review of elasmobranch bycatch and retention rate.2015-03-20.https://doi.org/10.1594/PANGAEA.844726.