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MeetingMeeting documentObjectives for Management Some Perspectives from the ABNJ Workshop in Sri Lanka, 22-24 April 2014 2014
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DocumentOther documentDoes social behavior influence the dynamics of aggregations formed by tropical tunas around floating objects? An experimental approach 2013
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No results found.Tropical tus associate with objects floating at the surface of the ocean, a behavior widely exploited by fish- ers. However, the respective roles played by environmental variables and behavioral processes (e.g., social behavior) in the formation of these aggregations remain elusive. To investigate the role of social behavior in the dymics of such aggregations, we used the biry choice approach. The experimental design com- prised two close and identical anchored fish aggregating devices (FADs) eq uipped with an echo sounder buoy to monitor the aggregated biomass of tu under each device. Alysis of the results entailed character- izing whether the aggregated biomass is distributed asymmetrically (indicative of social behavior playing a role in the dymics) or symmetrically between the two close and identical FADs, and comparing the results with theoretical distributions based on different definitions of basic units (individual fish or small schools). The results suggest that social interact ions underlie aggregation processes, which represents a major advance in our understanding of these aggregations, a priority for science-based fishery magement. While recogniz- ing the logistical and technical constraints, we encourage the development of experimental studies (e.g., in which animals are presented with controlled situations) to enhance our understanding of the behavior of large pelagic fish. -
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Book (series)FAO journal恢复地球—未来十年
Unasylva 252 - 2020年1月第71卷
2022本期Unasylva杂志旨在展示森林景观恢复（FLR）的机会和进展，这些机会和进展能扩大恢复的规模，以实现"波恩挑战"及其他国家和国际承诺（可持续发展目标（SDGs），《生物多样性公约》(CBD）2020年后议程、《联合国防治荒漠化公约》（UNCCD）土地退化零增长、《联合国气候变化框架公约》（UNFCCC）下的《巴黎协定》），并满足2021-2030年联合国生态系统恢复十年的需求。 杂志涉及与各受众相关的主题：i) 与所谓的 "一切照旧 "做法不同的旗舰恢复倡议，这些旗舰倡议能输送更多的资金，更好地赋予当地利益相关者权力，并通过合作伙伴联盟提供更多的技术援助；ii) 可以扩展森林景观恢复的技术进步，由于不同的原因（低成本、适应性、与许多生态系统和环境的相关性、易于实施等），这些技术进步很有可能成为主流。iii) 利于恢复的因素，即协调、政策环境、资源、知识和能力，这些因素都为在当地采取行动创造了有利条件。 -
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