@article{lyon_eggleston_smith_2021, title={COMPARISON OF VISUAL SURVEYS VERSUS DREDGING FOR MONITORING BAY SCALLOPS (ARGOPECTEN IRRADIANS) IN SEAGRASS BEDS}, volume={40}, ISSN={["1943-6319"]}, DOI={10.2983/035.040.0308}, abstractNote={ABSTRACT Bay scallops (Argopecten irradians), once a profitable fishery species in North Carolina, have declined in population size following harmful algal blooms in the late 1980s. To prepare for future scallop restoration efforts, appropriate survey methods should be identified to evaluate the status of the population with respect to managing harvest. The North Carolina Division of Marine Fisheries monitors bay scallop populations in seagrass beds using a scallop dredge, though it is still unclear what the current natural densities of bay scallops are. In this study, visual surveys in three time treatments (5, 10, and 20 min) were compared with dredging in terms of quantifying scallop density and the catch per unit effort (CPUE) in seagrass beds in Core Sound, North Carolina. There was no significant difference in scallop density and the CPUE among visual survey time treatments. Scallop densities observed during visual surveys were three times higher than densities using a scallop dredge; however, the CPUE was five times higher using a scallop dredge compared with visual surveys. If visual surveys indicate the true natural density of bay scallops in this study system, then the dredge sampling efficiency for evaluating bay scallop density was 33%. Dredging for bay scallops can uproot seagrass and displace juvenile bay scallops. Visual surveys provide a low-impact method for identifying the distribution and abundance of bay scallops in seagrass bed habitats.}, number={3}, journal={JOURNAL OF SHELLFISH RESEARCH}, author={Lyon, R. Patrick and Eggleston, David B. and Smith, Leslie M.}, year={2021}, month={Dec}, pages={511–517} }
 @article{lyon_eggleston_bohnenstiehl_layman_ricci_allgeier_2019, title={Fish community structure, habitat complexity, and soundscape characteristics of patch reefs in a tropical, back-reef system}, volume={609}, ISSN={["1616-1599"]}, url={http://dx.doi.org/10.3354/meps12829}, DOI={10.3354/meps12829}, abstractNote={Fig. S1. Box plots for nightly low frequency (0.1 – 1.5 kHz) SPL (a) and high frequency (4 – 20 kHz) SPL (b) for reef 5 for each lunar quarter. Red lines indicate median SPLs, ticks indicate maximum and minimum values, horizontal blue lines indicate 75% and 25% quantiles, and angled blue lines indicate the 95% upper and lower confidence levels in the median. Kruskal-Wallis tests were used to test for differences in SPL between lunar quarters. Relationships between water temperature (in C) and low frequency (0.1 – 1.5 kHz) SPL (c) and high frequency (4 – 20 kHz) SPL (d) were evaluated using linear regression models. 2 = 2.52 p = 0.47}, journal={MARINE ECOLOGY PROGRESS SERIES}, publisher={Inter-Research Science Center}, author={Lyon, R. Patrick and Eggleston, David B. and Bohnenstiehl, DelWayne R. and Layman, Craig A. and Ricci, Shannon W. and Allgeier, Jacob E.}, year={2019}, month={Jan}, pages={33–48} }
 @article{ricci_bohnenstiehl_eggleston_kellogg_lyon_2017, title={Oyster toadfish (Opsanus tau) boatwhistle call detection and patterns within a large-scale oyster restoration site}, volume={12}, ISSN={["1932-6203"]}, url={http://dx.doi.org/10.1371/journal.pone.0182757}, DOI={10.1371/journal.pone.0182757}, abstractNote={During May 2015, passive acoustic recorders were deployed at eight subtidal oyster reefs within Harris Creek Oyster Sanctuary in Chesapeake Bay, Maryland USA. These sites were selected to represent both restored and unrestored habitats having a range of oyster densities. Throughout the survey, the soundscape within Harris Creek was dominated by the boatwhistle calls of the oyster toadfish, Opsanus tau. A novel, multi-kernel spectral correlation approach was developed to automatically detect these boatwhistle calls using their two lowest harmonic bands. The results provided quantitative information on how call rate and call frequency varied in space and time. Toadfish boatwhistle fundamental frequency ranged from 140 Hz to 260 Hz and was well correlated (r = 0.94) with changes in water temperature, with the fundamental frequency increasing by ~11 Hz for every 1°C increase in temperature. The boatwhistle call rate increased from just a few calls per minute at the start of monitoring on May 7th to ~100 calls/min on May 10th and remained elevated throughout the survey. As male toadfish are known to generate boatwhistles to attract mates, this rapid increase in call rate was interpreted to mark the onset of spring spawning behavior. Call rate was not modulated by water temperature, but showed a consistent diurnal pattern, with a sharp decrease in rate just before sunrise and a peak just after sunset. There was a significant difference in call rate between restored and unrestored reefs, with restored sites having nearly twice the call rate as unrestored sites. This work highlights the benefits of using automated detection techniques that provide quantitative information on species-specific call characteristics and patterns. This type of non-invasive acoustic monitoring provides long-term, semi-continuous information on animal behavior and abundance, and operates effectively in settings that are otherwise difficult to sample.}, number={8}, journal={PLOS ONE}, publisher={Public Library of Science (PLoS)}, author={Ricci, Shannon W. and Bohnenstiehl, DelWayne R. and Eggleston, David B. and Kellogg, M. Lisa and Lyon, R. Patrick}, editor={Li, SonghaiEditor}, year={2017}, month={Aug} }