@article{cope_bergeron_archambault_jones_beaty_lazaro_shea_callihan_rogers_2021, title={Understanding the influence of multiple pollutant stressors on the decline of freshwater mussels in a biodiversity hotspot}, volume={773}, DOI={10.1016/j.scitotenv.2020.144757}, abstractNote={The Clinch River watershed of the upper Tennessee River Basin of Virginia and Tennessee, USA supports one of North America's greatest concentrations of freshwater biodiversity, including 46 extant species of native freshwater mussels (Order Unionida), 20 of which are protected as federally endangered. Despite the global biological significance of the Clinch River, mussel populations are declining in some reaches, both in species richness and abundance. The aim of this study was to evaluate the exposure of adult resident mussels to a suite of inorganic and organic contaminant stressors in distinct sections of the Clinch River that encompassed a range of mussel abundance and health. To provide insight into the potential role of pollutants in the decline of mussels, including within a previously documented “zone of mussel decline”, the mainstem Clinch River (8 sites) and its tributaries (4 sites) were examined over two consecutive years. We quantified and related metals and organic contaminant concentrations in mussels to their associated habitat compartments (bed sediment, suspended particulate sediment, pore water, and surface water). We found that concentrations of organic contaminants in resident mussels, particularly the suite of 42 polycyclic aromatic hydrocarbons (PAHs) analyzed, were related to PAH concentrations in all four habitat (media) compartments. Further, PAH concentrations in mussel tissue (range 37.8–978.1 ng/g dry weight in 2012 and 194.3–1073.7 ng/g dry weight in 2013) were negatively related to the spatial pattern in mussel densities (rs = −0.64, p ≤ 0.05 in 2012 and rs = −0.83, p ≤ 0.05 in 2013) within the river, and were highest in the “zone of mussel decline”. In contrast, the suite of 22 metals analyzed in resident mussels were largely unrelated to the spatial pattern of variation of metals in the four habitat compartments except for Manganese (Mn; range 3630.5-23,749.2 μg/g dry weight in 2012 and 1540.4-12,605.8 μg/g dry weight in 2013) in surface water (rs = 0.58, p < 0.1) and pore water (rs = 0.76, p ≤ 0.05). This study revealed that PAHs and Mn are important pollutant stressors to mussels in the Clinch River and that they are largely being delivered through the Guest River tributary watershed. Accordingly, future conservation and management efforts would benefit by identifying, and ideally mitigating, the sources of PAHs, Mn, and other current or legacy mining-associated pollutants to the mainstem river and its tributaries.}, journal={SCIENCE OF THE TOTAL ENVIRONMENT}, author={Cope, W. Gregory and Bergeron, Christine M. and Archambault, Jennifer M. and Jones, Jess W. and Beaty, Braven and Lazaro, Peter R. and Shea, Damian and Callihan, Jody L. and Rogers, Jennifer J.}, year={2021}, month={Jun}, pages={144757} } @article{callihan_harris_hightower_2015, title={Coastal Migration and Homing of Roanoke River Striped Bass}, volume={7}, ISSN={["1942-5120"]}, DOI={10.1080/19425120.2015.1057309}, abstractNote={AbstractAnadromy in Roanoke River Striped Bass Morone saxatilis has been documented; however, the specifics of the ocean migration and the degree of homing in this population remain unstudied and would greatly benefit the management of this economically important species. To this end, we telemetered and released 19 large Roanoke River Striped Bass (750–1,146 mm TL) on their spawning grounds during the springs of 2011 and 2012. Data from a large‐scale acoustic telemetry array along the U.S. Atlantic coast (480 total receivers, including the Roanoke River) were used to evaluate the seasonal migration and distribution of telemetered fish, their degree of homing and skipped spawning, their migration speeds, and the environmental drivers of migration timing. We found that large Roanoke River Striped Bass (>900 mm TL) rapidly emigrated (~59 km/d) after spawning to distant (>1,000 km) northern ocean waters (New Jersey to Massachusetts), where they spent their summers. They then migrated southward in the fall to overwintering habitats off Virginia and North Carolina and completed their migration circuit the following spring by returning to the Roanoke River to spawn. Our results showed no evidence of straying or skipped spawning, as all migrants successfully returned (homed) to the Roanoke River the next spring to spawn. Cooler ocean water temperatures in 2013 delayed the spring spawning run by nearly 3 weeks relative to a year of average spring temperatures (2012). Our study provides novel information that aids the management of Striped Bass at both small (e.g., setting of fishing seasons in the Roanoke River) and large spatial scales (e.g., stock identification of Roanoke River fish in the mixed‐stock ocean fishery) and more broadly highlights the utility of large‐scale cooperative telemetry arrays in studying fish migration.Received February 5, 2015; accepted May 27, 2015}, number={1}, journal={MARINE AND COASTAL FISHERIES}, author={Callihan, Jody L. and Harris, Julianne E. and Hightower, Joseph E.}, year={2015}, pages={301–315} } @article{callihan_godwin_buckel_2014, title={Effect of demography on spatial distribution: movement patterns of the Albemarle Sound-Roanoke River stock of Striped Bass (Morone saxatilis) in relation to their recovery}, volume={112}, ISSN={["1937-4518"]}, DOI={10.7755/fb.112.2-3.3}, number={2-3}, journal={FISHERY BULLETIN}, author={Callihan, Jody L. and Godwin, Charlton H. and Buckel, Jeffrey A.}, year={2014}, pages={131–143} } @article{callihan_godwin_dockendorf_buckel_2014, title={Growth and Mortality of Hatchery-Reared Striped Bass Stocked into Nonnatal Systems}, volume={34}, ISSN={["1548-8675"]}, DOI={10.1080/02755947.2014.951805}, abstractNote={AbstractCross‐stocking involves the use of fish from nonnatal sources to augment populations. This practice may not be effective, especially if fish from different populations are not well adapted to the environmental conditions of the areas intended for enhancement. Yet, the ecological consequences of cross‐stocking have received little attention, particularly in coastal environments. We used tag return data (1990–2010) from an ongoing stock enhancement program to compare the growth and mortality of hatchery‐reared Striped Bass Morone saxatilis of Roanoke River origin between their natal (Albemarle Sound estuary) and two nonnatal systems (Tar‐Pamlico and Neuse rivers) in North Carolina. Despite their Roanoke River origin, stocked juveniles exhibited high fidelity (>90%) to nonnatal systems and similarly high growth as in their natal habitat (von Bertalanffy K values were statistically similar among systems and ranged from 0.54 to 0.61). However, time‐at‐liberty estimators of total mortality (Z) indicated stocked Striped Bass experienced significantly higher mortality in nonnatal (Z values, 0.48–0.51) versus natal (Z = 0.33) systems. Therefore, while cross‐stocking may not contribute to stock rebuilding, it appeared to be an effective management tool for supporting local put‐and‐take fisheries for this recreationally and commercially important species.Received March 11, 2014; accepted July 16, 2014}, number={6}, journal={NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT}, author={Callihan, Jody L. and Godwin, Charlton H. and Dockendorf, Kevin J. and Buckel, Jeffrey A.}, year={2014}, pages={1131–1139} } @article{callihan_cowan_harbison_2013, title={Sex Differences in Residency of Adult Spotted Seatrout in a Louisiana Estuary}, volume={5}, ISSN={["1942-5120"]}, DOI={10.1080/19425120.2013.781559}, abstractNote={AbstractSpotted Seatrout Cynoscion nebulosus is the most highly sought after recreational species along the U.S. Gulf coast. However, movement information for this economically and ecologically important species is currently limited to data from mark–recapture studies. We used remote acoustic telemetry, a high‐resolution, fisheries‐independent technique, to examine the residency of adult Spotted Seatrout (n = 172) in a Louisiana estuary, Calcasieu Lake (∼300 km2). An estuarine‐wide array of 60 receivers was deployed for a 2.5‐year period (May 2007–October 2009) to detect and quantify how long fish were present in the estuary and determine the proportion of fish that emigrated from the system. We then determined how these metrics (detection period and emigration) were related to fish size, sex, and season of release. Emigration was highly seasonal and occurred exclusively during late spring and summer when water temperatures exceeded 24°C. Surprisingly, male Spotted Seatrout, regardless of their size, were more likely than females to “permanently” emigrate from the estuary (i.e., not return within the 1‐year battery life of transmitters) as evidenced by their shorter mean detection periods (males = 134 d, females = 177 d) and higher incidence of emigration (29–42% of males, but only 14–16% of females emigrated). Assessment and management strategies for this species may be improved by explicitly considering this behavioral difference between sexes. Namely, conducting stock assessments at a finer spatial scale (i.e., estuarine‐specific versus state‐wide) appears warranted given the high estuarine fidelity of females (∼85%), which exacerbates their potential for localized depletions due to anthropogenic stressors (e.g., fishing pressure, habitat alteration, or pollution).Received October 12, 2012; accepted February 26, 2013}, number={1}, journal={MARINE AND COASTAL FISHERIES}, author={Callihan, Jody L. and Cowan, James H., Jr. and Harbison, Michael D.}, year={2013}, month={Jan}, pages={79–92} }