A5069494482- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Marine and fisheries research
- Maritime Navigation and Safety
- Methane Hydrates and Related Phenomena
- Cephalopods and Marine Biology
- Food Industry and Aquatic Biology
- Marine Bivalve and Aquaculture Studies
- Species Distribution and Climate Change
- Plant and animal studies
- Arctic and Russian Policy Studies
- Marine and environmental studies
- Wildlife-Road Interactions and Conservation
- Ecology and Vegetation Dynamics Studies
- Avian ecology and behavior
- Mercury impact and mitigation studies
- Toxic Organic Pollutants Impact
- Wildlife Ecology and Conservation
- Heavy Metal Exposure and Toxicity
- History of Science and Medicine
- Indigenous Studies and Ecology
- Oil Spill Detection and Mitigation
- Ichthyology and Marine Biology
- Land Use and Ecosystem Services
- Isotope Analysis in Ecology
Pacific Environment
2022-2024
St Petersburg University
2012-2023
Geographical Institute
2021
Pacific Institute of Geography, Far Eastern Branch of the Russian Academy of Sciences
2021
Johns Hopkins University Applied Physics Laboratory
2016-2019
University of Washington
2016-2019
NOAA National Marine Fisheries Service
2018
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2017-2018
Seattle University
2017
National Oceanic and Atmospheric Administration
2017
Abstract Forestalling the decline of global biodiversity requires urgent and transformative action at all levels government society, particularly in Arctic Ocean adjacent seas where rapid changes are already underway. Amid growing scientific support mounting pressure, majority nations have committed to most ambitious conservation targets yet. However, without an approach that inclusively equitably reconciles sustainable ocean use, these will likely go unmet. Here, we present ArcNet: a...
Icebreaker operations in the Arctic and other areas are increasing rapidly to support new industrial activities shipping routes, but impact on pinnipeds these habitats is poorly explored. We present first quantitative study of icebreakers transiting ice-breeding habitat a phocid seal recommendations for mitigation. Impacts were recorded from vessel bridge during seven ice seasons 2006–2013, Caspian seals (Pusa caspica) breeding winter ice-field Sea. included displacement separation mothers...
We censused terrestrial bird assemblages along a five-stage urbanisation gradient (rural forest, industrial zone, peri-urban, suburban and urban habitats) in around Amravati City, Central India, between January April 2010–2013. A total of 89 species birds were recorded, with the highest detected richness rural areas (67 species) lowest one (29 species). The habitats had diversity, followed, decreasing order, by industrial, areas, supporting Gray's increasing disturbance rather than Connell's...
Polar bears are of international conservation concern due to climate change but difficult study because low densities and an expansive, circumpolar distribution. In a collaborative U.S.-Russian effort in spring 2016, we used aerial surveys detect estimate the abundance polar on sea ice Chukchi Sea. Our combination thermal imagery, digital photography, human observations. Using spatio-temporal statistical models that related bear track physiographic biological covariates (e.g., extent,...
Abstract: Diversity changes can be evaluated at various spatial scales, and the relationship between in diversity local, landscape regional scales is not evident. The overall patterns of functional beta bird assemblages were along a five-stage urbanization gradient, censused over months January to April years 2010–2013, around Amravati city, Deccan Plateau, Central India. We expected abundance large predatory species decline homogenize richness level. Overall, 112,829 birds belonging 89...
Populations of ice-associated seals in the Okhotsk Sea are assessed using modern instrumental aerial technique. The survey was conducted over a part ice-covered area on May 1-9, 2013 by means thermal scan and visual digital photography from aircraft-laboratory An-38 «Vostok». ice covered time estimated as 242,000 km 2 , 2,993 it transects with total length 5,617 km. number animals all within equipment swath counted. Four seal species were identified: bearded, spotted, ribbon, ringed seals,...
Industrial shipping activity in some Arctic and sub-Arctic seas is increasing during the winter spring seasons of heavy ice cover. Here, following from a previous study icebreaker impact on seals Caspian Sea, extent overlap between breeding habitat ice-associated pinnipeds other investigated. Significant industrial potential pinniped areas pupping period 2017 was recorded Baltic Gulfs Finland Bothnia (grey ringed seals), White Sea Newfoundland Belle Isle Strait (harp seal), Ob Estuary Kara...
The spatial distribution and habitat selection of the Ladoga ringed seal (Pusa hispida ladogensis), an endangered freshwater seal, are poorly understood, particularly for ice-covered period. A fixed-wing, strip-transect aerial survey conducted in early April 2012, before Lake breakup, provided data on density throughout lake relation to several environmental covariates: depth, distance shore, recreational ice-fishing activity, ice type. predictive model was applied combinations covariates...
The Caspian seal, Pusa caspica, is an ice-breeding phocid endemic to the Sea. breeding behavior of this species poorly documented. Here, we report behavioral observations 518 mother–pup pairs (MPs) and 210 lone pups (LPs), made from bridge icebreakers traversing seal grounds while servicing oil installations in northeastern Sea, during 34 trips late January early March, 2006–2012. habitat seals land-fast or drift ice, usually at least 20 cm thick, overlying water 3–5 m deep. Pregnant females...
Abstract To estimate abundance, surveys of marine mammals often rely on samples satellite‐tagged individuals to correct counts for the proportion animals that are unavailable be detected. However, naïve application this correction relies key assumption availability tagged sample resembles population. Here, we show how matrix population models can used stable age‐ and stage‐proportions, these adjust aerial survey factors so they represent population‐level availability. We illustrate procedure...
Abundance and density distribution of four seal species (ringed, ribbon, spotted, bearded) on spring ice was estimated based the data from two instrumental aerial surveys in western Bering Sea April-May 2012 April 2013 compared with previously published values. The number ringed seals about 61,000, they were rather evenly distributed southern, middle northern parts Russian EEZ Sea. ribbon 62,000 2012, but only 15,000 2013. bearded as 42,000 animals. abundance spotted shown to be a subject...
Abstract Knowledge of life‐history parameters is frequently lacking in many species and populations, often because they are cryptic or logistically challenging to study, but also can be difficult estimate with adequate precision. We suggest using hierarchical Bayesian analysis ( HBA ) analyze variation among related species, prior variance components representing shared taxonomy, phenotypic plasticity, observation error. develop such a framework U‐shaped natural mortality patterns typical...
This study presents a semi-automated approach utilizing unoccupied aerial vehicle (UAV) surveys to accurately estimate the abundance of Pacific walruses at large coastal haulouts in Chukotka, Russia. Seven major haulout sites were surveyed during summers and falls 2017-2019. Walrus counts performed using three distinct methods: traditional visual land-based counts, complete head georeferenced UAV imagery, counting within model polygons outline employing various extrapolation techniques...
Abstract Ringed ( Pusa hispida ) and bearded Erignathus barbatus seals are vulnerable to decreasing sea ice habitat in the rapidly warming Arctic. In April May of 2016, we conducted an aerial survey over ice-covered areas Chukchi Sea using thermal color cameras detect count these on ice. We related seal counts environmental variables, used relationships estimate species’ distributions abundance throughout Sea. accounted for incomplete detection due missed by sensors or image processing...
Sealing log books from 75 out of 79 commercial harvest cruises carried between 1972 and 1994 in the Sea Okhotsk, Russia, were analyzed to describe spatial temporal allocation ice-associated seal effort, species composition catches, total rates, related parameters for including ringed (Pusa hispida), ribbon (Histriophoca fasciata), bearded (Erignathus barbatus) spotted (Phoca largha) seal. Variations catch per unit effort explored relation year, sea ice conditions, day geographic location. In...
An instrumental aerial survey was conducted in the Russian part of Chukchi Sea and eastern East-Siberian spring 2016 to investigate new technical capabilities for estimating abundance distribution ringed bearded seals on ice. Density both species decreased with distance mainland; largest concentrations were detected coastal waters, including Koluchinskaya Chaunskaya Bays. Taking into account portion water (on average 32 %) that disturbed by aircraft engine noise dove 30.2 % 5.9 seals),...