Management of marine turtles at broad spatial scales is challenging due to the costs and the logistical feasibility of collecting ecological data and information on multiple threats at this scale. Spatially explicit assessments of the exposure of marine turtles to cumulative threats provides an alternative approach by identifying regions that are impacted by multiple threats at broad scales. To inform future management of juvenile green turtles, Chelonia mydas, off the southern and southeastern Brazilian coast we determined their cumulative exposure to five pertinent anthropogenic activities (marine traffic, port areas, and artisanal, trawl and gillnet fisheries). Information on the spatial distribution of juvenile green turtles was obtained by satellite tagging 14 wild-caught turtles in the Paranaguá Estuarine Complex, off the Paraná coast in southern Brazil and human activity information was obtained from various databases. This allowed us to identify the anthropogenic activities that provide the greatest risk to marine turtles (artisanal fisheries and marine traffic) and five “hotspot” threat areas that require prompt local management intervention to protect marine turtles in the region. These results can be used to inform on the ground efforts where further impact assessments and management interventions can be prioritized and undertaken.

由于在这种规模上收集有关多种威胁的生态数据和信息的成本和后勤可行性，在广阔的空间尺度上管理海龟具有挑战性。对海龟遭受累积威胁的空间明确评估提供了一种替代方法，即确定受到广泛范围内多种威胁影响的区域。为了通知未来的绿海龟（Chelonia mydas）管理，在巴西南部和东南部沿海地区，我们确定了它们在五种相关的人为活动（海上交通，港口地区以及个体，拖网和刺网渔业）中的累积暴露。通过在巴西南部巴拉那州沿海的巴拉那瓜河口综合体中对14只野生海龟进行卫星标记，获得了有关少年绿海龟空间分布的信息，并且从各种数据库中获得了人类活动信息。这使我们能够确定对海龟（手工渔业和海上交通）造成最大风险的人为活动以及需要立即进行当地管理以保护该地区海龟的五个“热点”威胁区域。