Pueta Mariana, Perotti Maria Gabriela
Laboratorio de Fotobiología- INIBIOMA (CONICET-UNComa), Instituto de Investigaciones en Biodiversidad y Medioambiente, Centro Regional Universitario Bariloche-Universidad Nacional del Comahue, San Carlos de Bariloche, Rio Negro, Argentina.
Departamento de Biología General. (CRUB-UNComa), Centro Regional Universitario Bariloche-Universidad Nacional del Comahue, San Carlos de Bariloche, Rio Negro, Argentina.
Anim Cogn. 2016 Jul;19(4):745-51. doi: 10.1007/s10071-016-0971-8. Epub 2016 Mar 11.
Recognition of predation risk from cues released from injured heterospecific could be beneficial when prey belongs to the same prey guild. Here, we performed three experiments. Experiment 1 showed that P. thaul tadpoles reduced their activity levels when exposed to conspecific injury cues, but not when exposed to amphipod injury cues. Experiment 2 tested whether P. thaul tadpoles can learn to recognize predation risk from chemical cues released from injured heterospecifics from the same prey guild (amphipod, Hyalella patagonica). A group of tadpoles were conditioned by exposing them to a specific concentration of amphipod injury cues paired with conspecific injury cues. Two days later, we evaluated changes in the activity of tadpoles when they were exposed to amphipod cues. As a control of learning, we used an unpaired group. Additionally, we used more control groups to fully investigate the learning mechanism. Our results showed that tadpoles can learn to recognize predation risk from injured amphipods and that the mechanism underlying the observed learned response could be associative. Experiment 3 replicated Experiment 2 and also showed that a low concentration of amphipod cues did not sustain that learning.
当猎物属于同一猎物群落时，从受伤的异种释放的线索中识别捕食风险可能是有益的。在此，我们进行了三项实验。实验1表明，当暴露于同种受伤线索时，陶氏南美蟾蝌蚪会降低其活动水平，但暴露于端足目动物受伤线索时则不会。实验2测试了陶氏南美蟾蝌蚪是否能从同一猎物群落（端足目动物，巴塔哥尼亚透明钩虾）受伤的异种释放的化学线索中学会识别捕食风险。一组蝌蚪通过暴露于与同种受伤线索配对的特定浓度的端足目动物受伤线索来进行条件训练。两天后，我们评估了蝌蚪暴露于端足目动物线索时其活动的变化。作为学习的对照，我们使用了未配对的一组。此外，我们使用了更多对照组来全面研究学习机制。我们的结果表明，蝌蚪可以学会从受伤的端足目动物中识别捕食风险，并且观察到的学习反应背后的机制可能是联想性的。实验3重复了实验2，并且还表明低浓度的端足目动物线索不能维持这种学习。
