Passos Luiza Figueiredo, Garcia Gerardo, Young Robert John
School of Environment and Life Sciences, Peel Building, University of Salford Manchester, Salford, United Kingdom.
Chester Zoo, Cedar House, Upton by Chester, Chester, United Kingdom.
PLoS One. 2017 Jul 21;12(7):e0181931. doi: 10.1371/journal.pone.0181931. eCollection 2017.
Acoustic communication is highly influential in the expression of social behavior by anuran amphibians, transmitting information about the individual's physical condition and motivation. We studied the phonotactic (approach movements) responses of wild and captive male golden mantella frogs to conspecific wild and captive playback calls to determine the impact of captivity on social behaviour mediated by vocalisations. Calls were recorded from one wild and two captive populations. Phonotaxis experiments were then conducted by attracting M. aurantiaca males across a PVC grid on the forest floor or enclosure floor to a speaker. For each playback, the following parameters were recorded to define the accuracy of phonotaxis: (1) number of jumps; (2) jump angles; (3) jump distances; (4) path straightness. During this experiment we observed that wild frogs had a similar behavioural (phonotaxis) response to calls independent of their source while frogs from Chester Zoo had a significantly stronger response to calls of other conspecifics held separately at Chester Zoo. The lack of appropriate phonotaxis response by captive bred frogs to the calls of wild conspecifics could have serious negative conservation implications, if the captive bred individuals were released back to the wild.
声学通讯在无尾两栖动物的社会行为表达中具有高度影响力，它传递着有关个体身体状况和动机的信息。我们研究了野生和圈养的雄性金色曼蛙对同种野生和圈养回放叫声的趋声性（接近动作）反应，以确定圈养对由发声介导的社会行为的影响。叫声是从一个野生种群和两个圈养种群中录制的。然后通过在森林地面或圈养场地的PVC网格上，将橙色曼蛙雄性个体吸引到一个扬声器处来进行趋声性实验。对于每次回放，记录以下参数以定义趋声性的准确性：（1）跳跃次数；（2）跳跃角度；（3）跳跃距离；（4）路径直线度。在这个实验中，我们观察到野生青蛙对叫声的行为（趋声性）反应与其来源无关，而切斯特动物园的青蛙对在切斯特动物园单独饲养的其他同种个体的叫声反应明显更强。如果圈养繁殖的个体被放归野外，圈养繁殖的青蛙对野生同种个体叫声缺乏适当的趋声性反应可能会产生严重的负面保护影响。
