Poidatz Juliette, Monceau Karine, Bonnard Olivier, Thiéry Denis
UMR 1065 Santé et Agroécologie du Vignoble INRA Villenave d'Ornon France.
UMR CNRS 7372 Centre d'Etudes Biologiques de Chizé Université de la Rochelle Villiers-en-bois France.
Ecol Evol. 2018 Jul 8;8(15):7588-7598. doi: 10.1002/ece3.4182. eCollection 2018 Aug.
In social insects, the activity rhythm of foragers and their action range determinate the activity of the colony. In vespids, which are mostly predators, the foraging range of workers determines their maximum predation pressure round the nest. One of these species, , a recently invasive species introduced into Europe, exerts a strong predation on honeybees at the hive. Therefore, the definition of its activity rhythm and spatial range of predation is of primary importance. Using radio frequency identification tags (RFID), two experiments were carried out to (a) determine their return ability (called homing) in releasing 318 individuals at different distance from their colony and (b) monitor their foraging activity rhythm and the duration of their flights based on 71 individuals followed 24 hr/24 during 2 months. The homing ability of was evaluated to be up to 5,000 m and was not affected by the cardinal orientation of release point. The lag time to return to the nest increased with the distance of release. Most of the flight activity took place between 07:00 a.m. and 08:00 p.m., hornets doing principally short flights of less than an hour. Foraging range was thus estimated ca. 1,000 m around the nest. This study of assisted by RFID tags provides for the first time a baseline for its potential foraging distance that increase our knowledge of this species to (a) refine more accurately models for risk assessment and (b) define security perimeter for early detection of predation on invasion front.
在群居性昆虫中，觅食者的活动节奏及其行动范围决定了群体的活动。在大多为捕食性昆虫的胡蜂中，工蜂的觅食范围决定了它们在蜂巢周围的最大捕食压力。其中一个物种， ，是最近引入欧洲的入侵物种，它对蜂巢中的蜜蜂施加了强大的捕食压力。因此，确定其活动节奏和捕食空间范围至关重要。使用射频识别标签（RFID），进行了两项实验：（a）在离其群体不同距离处释放318只个体，以确定它们的归巢能力（称为回巢）；（b）基于71只个体，在两个月内每天24小时进行跟踪，监测它们的觅食活动节奏和飞行时长。 的回巢能力评估为可达5000米，且不受释放点基本方位的影响。回巢的滞后时间随释放距离的增加而增加。大多数飞行活动发生在上午7点至晚上8点之间，黄蜂主要进行不到一小时的短距离飞行。因此，估计其在蜂巢周围的觅食范围约为1000米。这项借助RFID标签对 的研究首次提供了其潜在觅食距离的基线，增加了我们对该物种的了解，以便（a）更准确地完善风险评估模型，（b）确定安全范围，以便在入侵前沿早期发现捕食行为。
