Vocalizations are important for female attraction and territory delimitation in prolonged breeding anurans. Males of Hypsiboas prasinus display year-round nocturnal calling activity, using herbaceous and bushy vegetation along the margins of ponds as calling sites. We monitored the temporal pattern of calling activity from July 2011 to June 2012, and vocalizations were recorded for bioacoustical analysis. We quantified the physical parameters for four of the five types of vocalizations found in this species: an introductory advertisement call (Type A call), a chorus advertisement call (Type B call), a resuming activity advertisement call (Type C call), and an agonistic call. Calling activity was spread throughout the annual cycle and there was no correlation between air temperature and calling activity. This finding indicates that the calling pattern is controlled predominantly by behavior and not physiology. During the cold dry season, some individuals were observed to shift their calling sites to the water surface, causing vocalizations to be lower pitched and longer.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.