ABSTRACT

The sessile barnacle Xenobalanus globicipitis was observed on multiple cetacean species during field surveys off the northern coast of São Paulo state, Brazil. However, the occurrence of X. globicipitis in cetaceans in Brazilian waters has been, up to now, scarce. In the present study, this epibiont is reported for the first time in orcas (Orcinus orca), rough-toothed dolphins (Steno bredanensis) and Atlantic spotted dolphins (Stenella frontalis) from south-eastern Brazil. Guiana dolphins (Sotalia guianensis) and common bottlenose dolphins (Tursiops truncatus) have also been infested. This is the first world record of X. globicipitis in Balaenoptera brydei and Stenella frontalis. All records were photographed and may reveal changes in this barnacle’s settlement in 2018 and 2019. The possible causes for these infestations are discussed, including anthropogenic activities and recent oceanic events.

摘要

在巴西圣保罗州北部海岸进行的野外调查中，在多种鲸类物种上发现了无柄藤壶Xenobalanus globicipitis。然而，到目前为止，在巴西水域的鲸类中，球菌支原体的发生一直很少。在本研究中，首次在巴西东南部的逆戟鲸（Orcinus orca），粗齿海豚（Steno bredanensis）和大西洋斑海豚（Stenella frontalis）中报告了这种表生生物。圭亚那海豚（Sotalia guianensis）和普通的宽吻海豚（Tursiops truncatus）也已出没。这是X. globicipitis的世界纪录。在Baladeoptera brydei和Stenella frontalis中。所有记录均已拍照，并可能揭示该藤壶在2018年和2019年的栖息地变化。讨论了这些侵扰的可能原因，包括人为活动和最近的海洋事件。