Trajano E
Depto. Zoologia, Inst. Biociências da USP, Cx Postal 20520, 01498 São Paulo, Brazil.
Behav Processes. 1991 Mar;23(2):113-24. doi: 10.1016/0376-6357(91)90062-5.
Blind pimelodid catfishes Pimelodella kronei from a karstic area in Southeastern Brazil, were paired in the laboratory to study the agonistic behaviour. P. kronei, a recent troglobite, displays an intense and complex aggressive behaviour, presenting dominance based primarily on size. This dominance is established after bouts of duration inversely proportional to the size difference between the opponents. The aggressive repertoire of these pimelodids is similar to that of other studied siluriforms, and consists of varied and articulate components that include oscillations, shoves and bites. Once dominance is established, the subordinates recognize and avoid immediately the dominants after body contact or close proximity. High level of aggressivity in the blind catfishes may be related to competition for food in the cave habitat, where agonistic interactions were frequently observed.
来自巴西东南部岩溶地区的盲须鲶科鲶鱼克氏须鲶，在实验室中配对以研究其攻击行为。克氏须鲶是一种新近发现的洞穴生物，表现出强烈而复杂的攻击行为，主要基于体型确立优势地位。这种优势地位是在持续时间与对手体型差异成反比的较量之后确立的。这些须鲶科鲶鱼的攻击方式与其他已研究的鲶形目鱼类相似，包括摆动、推搡和撕咬等多样且清晰的动作。一旦优势地位确立，从属个体在身体接触或靠近后会立即识别并避开优势个体。盲鲶鱼的高攻击性可能与洞穴栖息地的食物竞争有关，在那里经常观察到争斗互动。
