Goedeker Sidney J, Wrynn Theresa E, Gall Brian G
Department of Biology Hanover College Hanover IN USA.
Ecol Evol. 2021 Feb 9;11(6):2899-2906. doi: 10.1002/ece3.7249. eCollection 2021 Mar.
Many organisms possess remarkable abilities to orient and navigate within their environment to achieve goals. We examined the orientation behavior of a riparian spider, the Long-Jawed Orb Weaver (), when displaced onto the surface of the water. When displaced, spiders move with alternating movements of the first three leg pairs while dragging the most posterior pair of legs behind them. In addition, spiders often perform a series of orientation behaviors consisting of concentric circles before ultimately choosing a path of travel directly toward the nearest point to land. While the number of orientation behaviors increased with increasing distance from shore, distance from shore had no effect on the direction of travel, which was significantly oriented toward the closest shoreline. These results indicate a complex ability to orient toward land when displaced onto water, possibly to decrease the amount of time on the surface of the water and thus decrease predation risk.
许多生物体拥有非凡的能力，能够在其环境中定向和导航以实现目标。我们研究了一种河岸蜘蛛——长颌圆蛛在被转移到水面上时的定向行为。当被转移时，蜘蛛通过前三对腿的交替运动移动，同时将最后一对腿拖在身后。此外，蜘蛛在最终选择直接朝着最近的陆地落点行进的路径之前，通常会进行一系列由同心圆组成的定向行为。虽然定向行为的数量随着离岸边距离的增加而增加，但离岸边的距离对行进方向没有影响，行进方向显著地朝向最近的海岸线。这些结果表明，当被转移到水面上时，蜘蛛具有朝向陆地定向的复杂能力，这可能是为了减少在水面上的停留时间，从而降低被捕食的风险。
