Biology subjects

Nickerson, M. A.

Publications and source records attributed to Nickerson, M. A..

3 recordsLinked to original sources

bioRxiv2021

Herpetologists' Conservation Research Focus Drives Their Intentions to Participate in Future Public Engagement

Public Engagement with Science (PES) is a popular topic in the science community due to general concerns about public support for science, attitudes toward science, and changes in scientific funding requirements. PES may be especially relevant in conservation disciplines as the public plays an important role in conservation practice. Herpetofauna specifically stand to benefit, as PES activities can help improve attitudes and conservation behavior of participants toward uncharismatic species. We assessed the current scope of herpetologists PES activities and investigated factors associated with their participation in PES. We used a closed-ended question survey distributed via the listservs of four American herpetological organizations. Herpetologists intentions to engage at least 10 hours in the next 12 months significantly differed between herpetologists with high and low conservation research focuses, but hours of engagement in the past 12 months was not significantly different among these groups. Despite most responding herpetologists having limited formal training, time, resources, and institutional support, many participated in a variety of PES activities, often utilizing partnerships and their own resources. Sampled herpetologists rarely evaluated their PES activities or considered publishing about their engagement activities. Some respondents expressed unease with the idea of message framing. Respondents were interested in evaluation training and providing accessible opportunities, and grant funds were the most likely interventions to increase herpetologists participation in PES. These results provide reference data and insight into the public engagement practices and needs of practicing herpetologists and conservation scientists. Author statementWe informed participants of their rights and protections as approved by University of Florida IRB201800258. None of the authors have conflicts of interest related to this research. Funding for the research was provided by a Roger Conant Grant from the Society for the Study of Amphibians and Reptiles (SSAR). SSAR had no role in interpretation of data, the writing of the report, or the decision to submit the article for publication.

scientific communication and education↗

bioRxiv2019

DO THESE CRAYFISH MAKE ME LOOK FAT? BODY CONDITION CORRELATES TO PREY ABUNDANCE IN THREE HELLBENDER (CRYPTOBRANCHUS ALLEGANIENSIS) POPULATIONS

In ecological studies body condition is often measured as an indicator of animal health or well-being. The Hellbender (Cryptobranchus alleganiensis) is a threatened salamander species found throughout the montane regions of the eastern United States. Although few young individuals have historically been found in the wild, recent studies in Blue Ridge Physiographic Regions have uncovered larvae in several streams. In Little River, Tennessee, differences in the crayfish population, the principal component of the adult Hellbender diet, was hypothesized as a potential reason for the large number of immature individuals, and lack of large adults. To investigate this hypothesis, we compared body condition of Hellbenders in three streams with different crayfish relative frequencies. Body condition of Hellbenders was positively correlated with crayfish relative frequencies, with Hellbenders in the stream with the highest crayfish relative frequency exhibiting the highest expected mass per total length.

ecology↗

bioRxiv2017

Hellbender Salamanders (Cryptobranchus alleganiensis) Exhibit An Ontogenetic Shift In Microhabitat Use In A Blue Ridge Physiographic Region Stream

Organisms that experience large changes in body size during the life span often exhibit differences in resource use among life stages. Ontogenetic shifts in habitat use reduce intraspecific competition and predation and are common in lotic organisms. Although information on the immature life stages of the Hellbender (Cryptobranchus alleganiensis) is limited, this aquatic salamander exhibits ontogenetic shifts in habitat use in some streams, with adults sheltering under large rocks and larvae utilizing interstitial spaces of gravel beds. Due to the geomorphology of Little River, Tennessee, however, limited interstitial spaces within the gravel are filled with sand. Therefore, we quantified microhabitat parameters for three life stages of Hellbenders (larvae, sub-adult, adult) to determine if an ontogenetic shift in microhabitat occurred in Little River. We found no significant differences in stream substrate at capture sites among the stages, but there was a positive correlation between rock shelters underlain with very coarse gravel and overall Hellbender occupancy. Although we found no difference in water quality parameters and streambed particle size among the stage classes at the sites of capture, there was a significant difference in the average shelter size among all stages, with larvae utilizing the smallest shelters. Based on these results, future Hellbender research and conservation efforts should consider differences in life stage habitat use as well as specific stream particle classes.

ecology↗