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by Vera Brust & Ommo Hüppop
Abstract Flights over open water can be challenging for migrating songbirds. Despite numerous observations of songbirds migrating over remote islands, virtually nothing is known about the proportion of songbirds risking to fly offshore rather than to follow the coastline. By means of large-scale automated radio-telemetry, we individually tracked songbirds during…
by Jan Reubens, Kim Aarestrup, Carl Meyer, Andy Moore, Finn Okland and Pedro Afonso
Abstract Acoustic telemetry is widely used to investigate aquatic animal movement. Pulse position modulation (PPM) is an acoustic telemetry method that allows multiple unique identification codes to be transmitted at a single acoustic frequency, typically in the 69 kHz range. However, because the potential number of unique identification codes (i.e. tags)…
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…
by Eneko Aspillaga, Robert Arlinghaus, Martina Martorell-Barceló, Margarida Barcelo-Serra and Josep Alós
Abstract Despite their potential to generate high-quality positioning data, the use of high-resolution acoustic telemetry systems (HRATS) has been neglected in coastal marine areas due to the limitations that these environments pose to the transmission of acoustic signals. In this work, we applied a HRATS and social network analysis (SNA)…
by Raphaël Musseau, Melina Bastianelli, Clementine Bely, Céline Rousselle & Olivier Dehorter
Abstract Background The European Kingfisher (Alcedo atthis) is a small plunge-diving bird, today considered a species of conservation concern in Europe given its rapid population decline observed across the continent. We implemented a pilot study aimed at providing first data allowing to: (1) assess home range features of the European…
by Ryan Knotek, Jeff Kneebone, James Sulikowski, Tobey Curtis, Joseph Jurek, and John Mandelman
Abstract Thorny skate (Amblyraja radiata) remain one of the most overfished species in the Gulf of Maine (GOM) despite being designated as a prohibited (zero possession, mandatory release) species by the New England Fishery Management Council in 2003. To better understand the extent to which discard mortality (DM) occurring after…
by Ko Fujiokaa, Hiromu Fukudaa, Yaoki Teia, Suguru Okamotob, Hidetada Kiyofujia, Seishiro Furukawac, Junichi Takagid, Ethan Estesse, Charles J. Farwelle, Daniel W. Fullerf, Nobuaki Suzukia, Seiji Ohshimoa, Takashi Kitagawag
Abstract Archival electronic tags were internally implanted in 713 age-0 Pacific bluefin tuna (PBF) caught in their nursery waters off the southern coast of Japan and in the East China Sea over an extended study period (1995–2015) to clarify the spatial and temporal variability of their trans-Pacific migration. Two hundred…
by Ko Fujioka, Hiromu Fukuda, Seishiro Furukawa, Yaoki Tei, Suguru Okamoto, Seiji Ohshimo
Abstract The habitat use of Pacific bluefin tuna (Thunnus orientalis; PBF) in nursery waters off the southern coast of Japan was investigated using archival tags over a 3 year study period (2012–2015), and the data were used to examine the free-ranging habitat preferences of PBF and the relationship between their…
by Rachel L. Shaw, Tobey H. Curtis, Gregory Metzger, Michael P. McCallister, Alisa Newton, G. Christopher Fischer and Matthew J. Ajemian
Abstract As highly mobile predators with extensive home ranges, some shark species often utilize a continuum of habitats across the continental shelf ranging from the surf zone to the open ocean. For many species, these cross-shelf distributions can change depending on ontogeny or seasonal conditions. Recent research has confirmed a…
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