Results 1 to 10 of about 90,552 (301)

Applying deep learning to right whale photo identification [PDF]

Conservation Biology, 2019
Abstract Photo identification is an important tool for estimating abundance and monitoring population trends over time. However, manually matching photographs to known individuals is time‐consuming. Motivated by recent developments in image recognition, we hosted a data science challenge on the crowdsourcing ...
Marek Cygan, Christin B Khan, Marcin Mucha   +2 more
exaly   +5 more sources

Observations on an Aggregation of Grey Reef Sharks (Carcharhinus amblyrhynchos) in the Mozambique Channel Off the Coast of Nosy Be (Madagascar) and Tools for Photo-Identification—A New Aggregation Nursery Site? [PDF]

Biology
Following preliminary underwater observations of about 1000 h carried out monthly between 2012 and 2023 (except the years 2021 and 2022), 23 specimens of grey reef sharks were spotted and photo-identified off the coast of Nosy Be in Madagascar, on an ...
Primo Micarelli, Marco Pireddu, Damiano Persia, Marco Sanna, Consuelo Vicariotto, Antonio Pacifico, Pietro Storelli, Makenna Mahrer, Emanuele Venanzi, Francesca Romana Reinero   +9 more
doaj   +2 more sources

First-Stage Algorithm for Photo-Identification and Location of Marine Species [PDF]

Animals
Marine species photo-identification and location for tracking are crucial for understanding the characteristics and patterns that distinguish each marine species. However, challenges in camera data acquisition and the unpredictability of animal movements
Rosa Isela Ramos-Arredondo, Francisco Javier Gallegos-Funes, Blanca Esther Carvajal-Gámez, Guillermo Urriolagoitia-Sosa, Beatriz Romero-Ángeles, Alberto Jorge Rosales-Silva, Erick Velázquez-Lozada   +6 more
doaj   +2 more sources

A deep learning approach to photo–identification demonstrates high performance on two dozen cetacean species

Methods in Ecology and Evolution, 2023
Researchers can investigate many aspects of animal ecology through noninvasive photo–identification. Photo–identification is becoming more efficient as matching individuals between photos is increasingly automated.
Philip T. Patton, Ted Cheeseman, Kenshin Abe, Taiki Yamaguchi, Walter Reade, Ken Southerland, Addison Howard, Erin M. Oleson, Jason B. Allen, Erin Ashe, Aline Athayde, Robin W. Baird, Charla Basran, Elsa Cabrera, John Calambokidis, Júlio Cardoso, Emma L. Carroll, Amina Cesario, Barbara J. Cheney, Enrico Corsi, Jens Currie, John W. Durban, Erin A. Falcone, Holly Fearnbach, Kiirsten Flynn, Trish Franklin, Wally Franklin, Bárbara Galletti Vernazzani, Tilen Genov, Marie Hill, David R. Johnston, Erin L. Keene, Sabre D. Mahaffy, Tamara L. McGuire, Liah McPherson, Catherine Meyer, Robert Michaud, Anastasia Miliou, Dara N. Orbach, Heidi C. Pearson, Marianne H. Rasmussen, William J. Rayment, Caroline Rinaldi, Renato Rinaldi, Salvatore Siciliano, Stephanie Stack, Beatriz Tintore, Leigh G. Torres, Jared R. Towers, Cameron Trotter, Reny Tyson Moore, Caroline R. Weir, Rebecca Wellard, Randall Wells, Kymberly M. Yano, Jochen R. Zaeschmar, Lars Bejder   +56 more
doaj   +2 more sources

The ecological connectivity of whale shark aggregations in the Indian Ocean: a photo-identification approach [PDF]

Royal Society Open Science, 2016
Samantha Andrzejaczek, Rebecca Fisher, Mark Meekan   +2 more
exaly   +2 more sources

Low Resighting Rate of Entangled Humpback Whales Within the California, Oregon, and Washington Region Based on Photo-Identification and Long-Term Life History Data

Frontiers in Marine Science, 2022
Bycatch, commonly referred to as entanglement, is a leading source of human-caused mortality of baleen whales. A better understanding of the individuals that survive (or perish from) their entanglement can help reduce the risk of bycatch by informing ...
Jennifer Tackaberry, Elana Dobson, Kiirsten Flynn, Ted Cheeseman, Ted Cheeseman, John Calambokidis   +5 more
doaj   +1 more source

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

Survival Rates and Capture Heterogeneity of Bottlenose Dolphins (Tursiops truncatus) in the Shannon Estuary, Ireland

Frontiers in Marine Science, 2021
Adult survival is arguably the most important demographic parameter for long-lived species as it has a large impact on population growth, and it can be estimated for cetacean populations using natural markings and mark-recapture (MR) modelling.
Kim E. Ludwig, Mags Daly, Stephanie Levesque, Simon D. Berrow, Simon D. Berrow   +4 more
doaj   +1 more source

Feeding grounds of the eastern South Pacific humpback whale population include the South Orkney Islands [PDF]

Polar Research, 2012
This paper reports on two photo-identified humpback whales (Megaptera novaeangliae) that were sighted in different years in the proximity of the South Orkney Islands, at the boundary between the Scotia and Weddell seas (60°54.5'S—46&#
Luciano Dalla Rosa, Fernando Félix, Peter T. Stevick, Eduardo R. Secchi, Judith M. Allen, Kim Chater, Anthony R. Martin, Manuela Bassoi   +7 more
doaj   +1 more source

Asymptotic Growth of Whale Sharks Suggests Sex-Specific Life-History Strategies

Frontiers in Marine Science, 2020
Age and growth data are central to management or conservation strategies for any species. Circumstantial evidence suggests that male whale sharks (Rhincodon typus) grow to asymptotic sizes much smaller than those predicted by age and growth studies and ...
Mark G. Meekan, Brett M. Taylor, Emily Lester, Emily Lester, Luciana C. Ferreira, Ana M. M. Sequeira, Alistair D. M. Dove, Matthew J. Birt, Alex Aspinall, Kim Brooks, Michele Thums   +10 more
doaj   +1 more source