Results 11 to 20 of about 7,386,477 (299)

Integrating Multiple Data Sources Improves Abundance Estimation in Spatial Capture–Recapture Models [PDF]

Ecology and Evolution
Reliable estimates of abundance are fundamental to conservation assessments and measuring the success of conservation actions, especially where populations are in decline or recovery.
Georgina Whittome, John Calambokidis, Philip S. Hammond, Ladd Irvine, Bruce R. Mate, Daniel M. Palacios, Sophie Smout, Chris Sutherland   +7 more
doaj   +2 more sources

The Bridle Mark System on Bottlenose Dolphins (Tursiops truncatus): Pigmented Facial Features Supplement Photo-Identification [PDF]

Animals
Research on free-ranging animal species, which extends from the breadth of stock identification and population dynamics to fine-scaled analysis of behavior, depends on identifying individuals.
Barbara J. Brunnick, Graysen D. Boehning, Stefan Harzen   +2 more
doaj   +2 more sources

Movements and social behavior of killer whales (Orcinus orca) off the Brazilian coast

Frontiers in Marine Science, 2023
Killer whales (Orcinus orca) are cosmopolitan apex predators that occupy important ecological roles and show some variations in feeding and social habits in coastal and pelagic environments worldwide.
Aline Athayde, Aline Athayde, Mauricio Cantor, Júlio Cardoso, Arlaine Francisco, Frank Pereira dos Santos, Heitor Crespo, Heitor Crespo, Marcel Vinicius de Morais, Manuel da Cruz Albaladejo, Hugo Gallo Neto, Salvatore Siciliano   +11 more
doaj   +1 more source

A note on long-distance matches of bottlenose dolphins (Tursiops truncatus) around the Irish coast using photo-identification

J. Cetacean Res. Manage., 2023
Images of 120 individual bottlenose dolphins from around the Irish coast were obtained from three photo-identification catalogues. Twenty three individuals were subsequently re-sighted, which is a re-sighting rate of 19%.
J. O'Brien, S. Berrow, C. Ryan, D. Mcgrath, I. O’Connor, Giovanna Pesante, G. Burrows, Nick Massett, Vanessa Klotzer, Pádraig Whooley   +9 more
semanticscholar   +1 more source

A new classification method to simplify blue whale photo-identification technique

J. Cetacean Res. Manage., 2023
Individual identification of blue whales is based on unique pigmentation patterns. Historically photo-identification has been based on the pigmentation patterns observed on a large portion of the animal’s flanks.
D. Gendron, Azucena de la Cruz
semanticscholar   +1 more source

First estimates of population size and home range of Caribbean reef and nurse sharks using photo-identification and BRUVS

Frontiers in Marine Science, 2023
The assessment of parameters population size and individual home range is important for effective conservation management of sharks. This study uses the novel application of photo identification (photo-ID) to BRUVS footage as a non-invasive alternative ...
J. Kohler, Mauvis A. Gore, Rupert F. Ormond, Timothy Austin   +3 more
semanticscholar   +1 more source

A Novel Technique for Photo-Identification of the Fin Whale, Balaenoptera physalus, as Determined by Drone Aerial Images

Drones, 2023
Drones have become a crucial research tool across marine environments over the past decade, being specifically useful in marine mammal research.
Eduard Degollada, Natàlia Amigó, Seán A. O'Callaghan, Mila Varola, K. Ruggero, Beatriu Tort   +5 more
semanticscholar   +1 more source

Flukebook: an open-source AI platform for cetacean photo identification

Mammalian Biology, 2022
Determining which species are at greatest risk, where they are most vulnerable, and what are the trajectories of their communities and populations is critical for conservation and management. Globally distributed, wide-ranging whales and dolphins present
D. Blount, Shane Gero, Jon Van Oast, J. Parham, Colin Kingen, B. Scheiner, Tanya Stere, Mark Fisher, G. Minton, C. Khan, V. Dulau, Jaime W. Thompson, Olga Moskvyak, T. Berger-Wolf, Chuck Stewart, J. Holmberg, J. Levenson   +16 more
semanticscholar   +1 more source

A photo-identification-based assessment model of southern right whales Eubalaena australis surveyed in South African waters, with a focus on recent low counts of mothers with calves

African Journal of Marine Science, 2023
Photo-identification data for southern right whale cow–calf pairs on the South African calving grounds provide one of the longest abundance time-series for any whale population worldwide.
A. Brandão, A. Ross-Gillespie, E. Vermeulen, D. Butterworth   +3 more
semanticscholar   +1 more source

Surfacing rates, swim speeds, and patterns of movement of Antarctic blue whales

Frontiers in Marine Science, 2023
During three surveys in the austral summers of 2013, 2015, 2019, data on Antarctic blue whale blow rates, dive times, swim speeds, and broadscale movements were collected using video photogrammetric tracking and intra-voyage photo-identification. A total
Susannah V. Calderan, Susannah V. Calderan, Russell Leaper, Russell Leaper, Virginia Andrews-Goff, Brian S. Miller, Paula A. Olson, Paula A. Olson, M. V. Reyes Reyes, M. V. Reyes Reyes, M. V. Reyes Reyes, Elanor Bell, Michael C. Double   +12 more
doaj   +1 more source