by Aaron A. Skinner, Michael P. Ward, Ian Souza-Cole, James R. Wright, Frank R. Thompson III, Thomas J. Benson, Stephen N. Matthews, Christopher M. Tonra
Abstract Aim A full annual cycle approach to conservation and understanding of regional population trends requires an understanding of migratory connectivity. We present tracking data on the eastern whip-poor-will (Antrostomus vociferus), a Neotropical migrant that has declined by 70% in recent decades. When and where populations of this species are…
by Domingos Garrone-Neto, Gabriel Raposo Silva de Souza, Felippe Alexandre Miranda de Lisboa Daros, Jairo Fidel Novoa Serna, Mónica Andrea Morales-Betancourt, Carlos Andrés Lasso
Abstract In this study a telemetry-based approach was used to examine the movements and the habitat utilization of Potamotrygon motoro, a widespread species of potamotrygonid stingray of South America. The investigation included 13 individuals that were tagged with acoustic transmitters and manually monitored from March to September 2017 in the…
by James A.Sulikowski, Walt Golet, Eric R.Hoffmayer, William B. Driggers III, Lisa J. Natanson, Amy Carlson, Brett B.Sweezey
Abstract The latest stock assessment for the dusky shark, Carcharhinus obscurus, in the western North Atlantic Ocean indicates the population is overfished and experiencing overfishing. As part of a rebuilding plan, the commercial and recreational retention of dusky sharks has been prohibited since 2000. Despite this prohibition, dusky sharks are…
by Armando J. B. Santos, Daniel H. G. Vieira, Claudio Bellini, Gilberto Corso, Simona A. Ceriani & Mariana M. P. B. Fuentes
Abstract Population abundance data are often used to define species’ conservation status. Abundance of marine turtles is typically estimated using nesting beach monitoring data such as nest counts and clutch frequency (CF, i.e., the number of nests female turtles lay within a nesting season). However, studies have shown that CF…
by Richard Evan Feldman, Antonio Celis-Murillo, Jill L. Deppe & Michael P. Ward
Abstract For migrating birds, stopover requires spending time and energy that otherwise could be allocated to flying. Thus, birds optimally refuel their subsequent migratory flight by reducing stopover duration or foraging activity in food-rich environments. In coastal habitats, birds may forego refueling and take short stopovers irrespective of local food…
by Jacy S. Bernath-Plaisted, Arvind O. Panjabi, Nicole A. Guido, Kelsey D. Bell, Nancy E. Drilling, Erin H. Strasser, Sandra K. Johnson and Maureen D. Correll
Abstract Many studies of reproductive success in North American songbirds have focused on nesting success, while relatively few have evaluated breeding-season adult survival and post-fledging survival. Grassland songbirds are among North America's most rapidly declining avian groups, and knowledge of factors that influence vital rates is needed to address declines,…
by Allison Patterson, H. Grant Gilchrist, Anthony Gaston, Kyle H. Elliott
Abstract Climate change is altering the marine environment at a global scale, with some of the most dramatic changes occurring in Arctic regions. These changes may affect the distribution and migration patterns of marine species throughout the annual cycle. Species distribution models have provided detailed understanding of the responses of…
by Patrick Miller, Filipa Samarra, Paul Wensveen, Charlotte Curé, Lars Kleivane
Trial Outcome Overall, the pilot study trial was very successful, with excellent tagging outcomes success and tracking including four sound playbacks completed – all primary objectives achieved successfully. The facilities at U Iceland and team were outstanding. Everyone was well, no injuries or sickness. No major equipment was damaged or…
by Jacy S. Bernath-Plaisted, Arvind O. Panjabi, Nicole A. Guido, Kelsey D. Bell, Nancy E. Drilling, Erin H. Strasser, Sandra K. Johnson and Maureen D. Correll
Abstract Many studies on the reproductive success of North American passerines have looked at nesting success, but relatively few studies have evaluated adult survival during the nesting period and survival after fledging. Prairie passerines are among the fastest declining bird groups in North America and knowledge of the factors that…
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