Results 21 to 30 of about 51,836 (276)

Microflora of the polar bear (Ursus maritimus) from natural population of the Russian Arctic [PDF]

E3S Web of Conferences, 2021
The paper presents the results of studying the microflora of the polar bear (Ursus maritimus) organism. Samples from 22 individuals were collected during three comprehensive scientific expeditions arranged in 2014 and 2015 at the request of PJSC Rosneft ...
Denisenko Tatyana, Boltunov Andrey, Belikov Stanislav   +2 more
doaj   +1 more source

Examining the Role of Marine Mammals and Seabirds in Southeast Alaska’s Marine Ecosystem Dynamics

Frontiers in Marine Science, 2021
Primary producers are the foundation of marine food webs and require reliable nutrient sources to maintain their important role with ecosystems. While marine mammals and seabirds can play critical roles in marine nutrient cycling, their contributions are
Melissa Rhodes-Reese, David Clay, Curry Cunningham, Janet Moriles-Miller, Cheryl Reese, Joe Roman, Joseph D. Warren, Heidi C. Pearson   +7 more
doaj   +1 more source

Diffusion modeling reveals effects of multiple release sites and human activity on a recolonizing apex predator

Movement Ecology, 2021
Background Reintroducing predators is a promising conservation tool to help remedy human-caused ecosystem changes. However, the growth and spread of a reintroduced population is a spatiotemporal process that is driven by a suite of factors, such as ...
Joseph M. Eisaguirre, Perry J. Williams, Xinyi Lu, Michelle L. Kissling, William S. Beatty, George G. Esslinger, Jamie N. Womble, Mevin B. Hooten   +7 more
doaj   +1 more source

Efficacy of bear spray as a deterrent against polar bears

Wildlife Society Bulletin, 2023
Although there have been few attempts to systematically analyze information on the use of deterrents on polar bears (Ursus maritimus), understanding their effectiveness in mitigating human‐polar bear conflicts is critical to ensuring both human safety ...
James M. Wilder, Lindsey S. Mangipane, Todd Atwood, Anatoly Kochnev, Tom Smith, Dag Vongraven   +5 more
doaj   +1 more source

By-catch of common minke whales (Balaenoptera acutorostrata) in Norwegian demersal trawl and longline fisheries, 2011–2020

NAMMCO Scientific Publications
The Norwegian High Seas Reference Fleet (HSRF) reported one minke whale (Balaenoptera acutorostrata) by-caught in demersal trawl fisheries and one in a longline in the period 2011–2020.
André Moan, Arne Bjørge
doaj   +1 more source

EFPC: An Environmentally Friendly Power Control Scheme for Underwater Sensor Networks

Sensors, 2015
In oceans, the limited acoustic spectrum resource is heavily shared by marine mammals and manmade systems including underwater sensor networks. In order to limit the negative impact of acoustic signal on marine mammals, we propose an environmentally ...
Qiuling Yang, Yishan Su, Zhigang Jin, Guidan Yao   +3 more
doaj   +1 more source

Scalable Access to N‑Acylindole Linkages: Enabling the Synthesis of Antitrypanosomal Noncanonical Cyclic Peptides for Chagas Disease

Angewandte Chemie, EarlyView.
A gram‐scale supply of bulbiferamide A, which features a rare N‐acylindole linkage and possesses potent inhibitory activity against Trypanosoma cruzi epimastigotes (IC50 = 4.1 µM)—the causative parasite of Chagas disease—was successfully achieved. Moreover, the cyclization strategy developed in this study facilitated the synthesis of noncanonical ...
Jie Zhang, Hugh Nakamura
wiley   +2 more sources

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

First Report on the Prevalence and Subtype Distribution of Blastocystis sp. in Edible Marine Fish and Marine Mammals: A Large Scale-Study Conducted in Atlantic Northeast and on the Coasts of Northern France

Microorganisms, 2020
Blastocystis is frequently identified in humans and animal hosts and exhibits a large genetic diversity with the identification of 17 subtypes (STs).
Nausicaa Gantois, Angélique Lamot, Yuwalee Seesao, Colette Creusy, Luen-Luen Li, Sébastien Monchy, Sadia Benamrouz-Vanneste, Jacky Karpouzopoulos, Jean-Luc Bourgain, Célia Rault, Fabien Demaret, Martha Baydoun, Magali Chabé, Emilie Fréalle, Cécile-Marie Aliouat-Denis, Mélanie Gay, Gabriela Certad, Eric Viscogliosi   +17 more
doaj   +1 more source

Bycatch of marine mammals in the Northwest Atlantic during commercial fishery (based on literature materials and observations by the Polar branch of VNIRO in 2013–2020)

Vestnik MGTU, 2022
This paper describes one of the most acute problem for both environmental companies and fisheries – bycatch of marine mammals caused by bioresource exploitation in the Northwest Atlantic (NWA).
Mishin T. V.
doaj   +1 more source