Cryptobranchus alleganiensis (Hellbenders) are primarily nocturnal salamanders, emerging at night from their daytime rock retreats. Most populations exhibit infrequent diurnal activity, mainly during the breeding season or during overcast or rainy days. This paper reports on a population of Hellbenders from Transylvania County, NC, where 148 observations of diurnal activity were made during 51 person hours over a 3-yr period. Hellbenders were most diurnally active during the September breeding season (mean = 16.3 individuals/person hr), but also exhibited high levels of diurnal activity during summer months, especially in May (mean = 11.4 individuals/person hr). Diurnal activity was not correlated with cloud cover, water depth, or time of day when searches were conducted, but was positively correlated with water temperature. Previous literature and numerous surveys conducted by the author in other parts of the Hellbender's range suggest that this North Carolina population is unique in its diurnal activity, which is possibly related to factors such as prey availability, intraspecific competition, or predator threats.
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.