Results 21 to 30 of about 90,552 (301)

Group Size of Indo-Pacific Humpback Dolphins (Sousa chinensis): An Examination of Methodological and Biogeographical Variances

Frontiers in Marine Science, 2021
Observer-based counts and photo-identification are two well-established methods with an extensive use in cetacean studies. Using these two methods, group size has been widely reported, especially for small dolphins.
Mingming Liu, Mingming Liu, Mingming Liu, Mingli Lin, Xiaoming Tang, Xiaoming Tang, Lijun Dong, Peijun Zhang, David Lusseau, David Lusseau, Songhai Li, Songhai Li   +11 more
doaj   +1 more source

Contrasting Habitat Use and Population Dynamics of Reef Manta Rays Within the Nusa Penida Marine Protected Area, Indonesia

Frontiers in Marine Science, 2019
Manta rays (Mobula spp.) are highly valued in nature-based tourism globally. In Indonesia, although manta rays are protected, critical information is lacking on their habitat use, population dynamics and movements. We investigate the population structure
Elitza S. Germanov, Elitza S. Germanov, Elitza S. Germanov, Lars Bejder, Lars Bejder, Delphine B. H. Chabanne, Delphine B. H. Chabanne, Dharmadi Dharmadi, I. Gede Hendrawan, Andrea D. Marshall, Simon J. Pierce, Mike van Keulen, Mike van Keulen, Neil R. Loneragan, Neil R. Loneragan, Neil R. Loneragan   +15 more
doaj   +1 more source

Temporal and Spatial Evaluation of Mono(2-ethylhexyl) Phthalate (MEHP) Detection in Common Bottlenose Dolphins (Tursiops truncatus) from Sarasota Bay, Florida, USA

Oceans, 2022
Phthalates are endocrine-disrupting chemicals added to plastics, personal care products, cleaning solutions, and pesticides. Extensive use has led to its exposure to wildlife, including common bottlenose dolphins (Tursiops truncatus) from Sarasota Bay ...
Miranda K. Dziobak, Brian C. Balmer, Randall S. Wells, Emily C. Pisarski, Ed F. Wirth, Leslie B. Hart   +5 more
doaj   +1 more source

Photo Identification of Individual Salmo trutta Based on Deep Learning [PDF]

Applied Sciences, 2021
Individual fish identification and recognition is an important step in the conservation and management of fisheries. One of most frequently used methods involves capturing and tagging fish. However, these processes have been reported to cause tissue damage, premature tag loss, and decreased swimming capacity. More recently, marine video recordings have
Marius Pedersen, Ahmed Mohammed
openaire   +2 more sources

Sightings of Antarctic minke whales, Balaenoptera bonaerensis, near the Kiev Peninsula (West Antarctica) during the summer period of 2019

Український антарктичний журнал, 2020
Antarctic Peninsula region is experiencing one of the fastest rates of climate change on Earth. Its waters are known as important feeding grounds for the Antarctic minke whales (Balaenoptera bonaerensis).
O. Savenko
doaj   +1 more source

Integrating Multiple Techniques to Estimate Population Size of an Impacted Dusky Dolphin’s Population in Patagonia, Argentina

Frontiers in Marine Science, 2020
Successful conservation strategies require an accurate estimation of population size, and this parameter is one of the most important factors that determine the rate of various evolutionary processes. In this study, we integrated information from genetic,
Mariana Degrati, Mariana Degrati, Rocio Loizaga, Mariano A. Coscarella, Mariano A. Coscarella, Nicolás Sueyro, Nicolás Sueyro, Enrique A. Crespo, Enrique A. Crespo, Silvana L. Dans, Silvana L. Dans   +10 more
doaj   +1 more source

Blue Whale Body Condition Assessed Over a 14-Year Period in the NE Pacific: Annual Variation and Connection to Measures of Ocean Productivity

Frontiers in Marine Science, 2022
Large marine mammals can serve as an indicator of the overall state of the environment due to their apex position in marine food webs and their functions as sentinels of change.
Rachel Wachtendonk, Rachel Wachtendonk, John Calambokidis, Kiirsten Flynn   +3 more
doaj   +1 more source

Convolutional Neural Networks for Risso’s Dolphins Identification

IEEE Access, 2020
Photo-identification is one of the best practices to estimate the abundance of cetaceans and, as such, it can help to obtain the biological information necessary to decision-making and actions to preserve the marine environment and its biodiversity.
Rosalia Maglietta, Vito Reno, Rocco Caccioppoli, Emanuele Seller, Stefano Bellomo, Francesca Cornelia Santacesaria, Roberto Colella, Giulia Cipriano, Ettore Stella, Karin Hartman, Carmelo Fanizza, Giovanni Dimauro, Roberto Carlucci   +12 more
doaj   +1 more source

Factors affecting the identification of individual mountain bongo antelope [PDF]

, 2015
The recognition of individuals forms the basis of many endangered species monitoring protocols. This process typically relies on manual recognition techniques.
Alibhai, Anderson, Arzoumanian, Auger-Méthé, Bendik, Bindemann, Bonfil, Bosley, Burton, Carbone, Caro, CBSG, Chapman, Estes, Estudillo, Fujiwara, Fujiwara, Graham, Gu, Hiby, Hoque, IBM Corp, Johnston, Jorgensen, Karanth, Karanth, Katona, Katona, Kingdon, Lahiri, Megreya, Mendoza, Morrison, O’Connell, Paviolo, Prettejohn, Rocha, Rowcliffe, Sharma, Silvertown, Stander, Veasey, White   +42 more
core   +3 more sources

Revisiting animal photo-identification using deep metric learning and network analysis [PDF]

Methods in Ecology and Evolution, 2020
AbstractAn increasing number of ecological monitoring programs rely on photographic capture-recapture of individuals to study distribution, demography and abundance of species. Photo-identification of individuals can sometimes be done using idiosyncratic coat or skin patterns, instead of using tags or loggers. However, when performed manually, the task
Miele, Vincent, Dussert, Gaspard, Spataro, Bruno, Chamaillé-Jammes, Simon, Allainé, Dominique, Bonenfant, Christophe   +5 more
openaire   +3 more sources