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Fishers as foragers: Individual variation among small-scale fishing vessels as revealed by novel tracking technology
Fisheries Research ( IF 2.4 ) Pub Date : 2021-02-12 , DOI: 10.1016/j.fishres.2021.105896
Timothy H. Frawley , Hannah E. Blondin , Timothy D. White , Rachel R. Carlson , Brianna Villalon , Larry B. Crowder

Effective fisheries management requires an understanding of fisher behavior. Though vessel tracking systems are increasingly used to describe the movements and activities of industrial fishing fleets, their use has been limited within the small-scale fisheries employing the vast majority of the world’s capture fishers. Here we combine novel vessel tracking technology with logbook data to conduct a high-resolution analysis of behavior and decision-making within a small-scale fishery. Our results indicate significant heterogeneity in fisher behavior, catch composition, and profits within a small-scale fleet operating in the central Gulf of California, even amongst fishing vessels using similar gear types. The weekly home ranges (75 % Kernel Utilization Distribution) occupied by fishers spanned 1.5–1121.8 km2 across 13 vessels, while weekly profits ranged from -1810 to 26,160 pesos. Differences in the spatial interactions and catch profiles of observed vessels revealed the existence of behavioral associations linked with distinct fishing strategies. After identifying and describing the contextual factors driving such heterogeneity among vessels using hook and line fishing gear, we interpret emergent patterns and processes using insights from foraging theory and marine social science. In illustrating the applications and opportunities presented by recent advances in vessel tracking technology, we argue for the use of spatially explicit analytical approaches in assessing behavioral diversity within small-scale fisheries and in designing robust and equitable management strategies.



中文翻译:

渔民为觅食者:新型追踪技术揭示了小型渔船之间的个体差异

有效的渔业管理需要了解渔民的行为。尽管越来越多地使用船只跟踪系统来描述工业捕鱼船队的活动和活动,但在使用世界绝大多数捕捞渔民的小型渔业中,其使用受到限制。在这里,我们将新颖的船只跟踪技术与日志数据相结合,以对小规模渔业中的行为和决策进行高分辨率分析。我们的结果表明,即使在使用类似渔具类型的渔船中,在加利福尼亚湾中部作业的小型船队中,渔民的行为,渔获物组成和利润也存在很大的异质性。渔民每周居住的范围(75%的内核利用分布)跨越1.5–1121.8 km 2横跨13艘船,而周获利介于-1810至26,160比索之间。在空间相互作用和观察到的渔获量方面的差异揭示了与不同捕捞策略相关的行为关联的存在。在使用钩钓工具确定并描述了导致船舶异质性的背景因素之后,我们利用觅食理论和海洋社会科学的见解解释了新兴的模式和过程。在说明船只跟踪技术的最新进展所带来的应用和机会时,我们主张使用空间明确的分析方法来评估小型渔业中的行为多样性以及设计稳健而公平的管理策略。

更新日期:2021-02-12
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