A5055795243- Marine and fisheries research
- Fish Ecology and Management Studies
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Geological Studies and Exploration
- Underwater Acoustics Research
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Species Distribution and Climate Change
- Neural and Behavioral Psychology Studies
- Geological Modeling and Analysis
- Climate change and permafrost
- Marine and coastal plant biology
- Marine and environmental studies
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
- Schizophrenia research and treatment
- Marine Biology and Ecology Research
- Psychology of Moral and Emotional Judgment
- Oceanographic and Atmospheric Processes
- Personal Information Management and User Behavior
- Treatment of Major Depression
- Electroconvulsive Therapy Studies
Université de Perpignan
2021-2024
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2013-2024
NOAA National Marine Fisheries Service
2007-2024
Centre de Formation et de Recherche sur les Environnements Méditerranéens
2021-2024
National Oceanic and Atmospheric Administration
2013-2023
Justus-Liebig-Universität Gießen
2002-2011
University of Washington
2003
University of Iowa
1988
Bathymetry (seafloor depth), is a critical parameter providing the geospatial context for multitude of marine scientific studies. Since 1997, International Bathymetric Chart Arctic Ocean (IBCAO) has been authoritative source bathymetry Ocean. IBCAO merged its efforts with Nippon Foundation-GEBCO-Seabed 2030 Project, goal mapping all oceans by 2030. Here we present latest version (IBCAO Ver. 4.0), more than twice resolution (200 × 200 m versus 500 m) and individual depth soundings...
Abstract The importance of interspecific competition as a mechanism regulating population abundance in offshore marine communities is largely unknown. We evaluated between Asian pink salmon and Bristol Bay (Alaska) sockeye salmon, which intermingle the North Pacific Ocean Bering Sea, using unique biennial cycle from 1955 to 2000. Sockeye growth during second third growing seasons at sea, determined by scale measurements, declined significantly odd‐numbered years, corresponding years when are...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 551:117-130 (2016) - DOI: https://doi.org/10.3354/meps11703 Validation and improvement of species distribution models for structure-forming invertebrates in eastern Bering Sea with an independent survey Christopher N. Rooper1,*, Michael F. Sigler2, Pam Goddard1, Pat Malecha3, Rick Towler1, Kresimir Williams1,...
Describing essential habitat is an important step toward understanding and conserving harvested species in ecosystem-based fishery management. Using data from fishery-independent ichthyoplankton, groundfish surveys, commercial fisheries observer data, we utilized distribution modeling techniques to predict habitat-based spatial distributions of federally managed Alaska. The abundance maps were used refine existing fish descriptions for the region. In particular, maximum entropy generalized...
Over past decades, sustained meltwater discharge has formed rapidly growing proglacial deltas in the fjords and bays along glaciated coast of Alaska. These are efficient traps glaciofluvial sediment, buffering sediment flux from land to ocean altering coastal ecosystems. In addition seasonal discharge, rates transport Alaska can be elevated by episodic Glacier Lake Outburst Floods (GLOFs). Here we explore contribution GLOFs accumulation on two that simultaneously at head Lituya Bay, Bay...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 503:157-176 (2014) - DOI: https://doi.org/10.3354/meps10710 Predictive models of coral and sponge distribution, abundance diversity in bottom trawl surveys Aleutian Islands, Alaska Christopher N. Rooper1,*, Mark Zimmermann1, Megan M. Prescott2, Albert J. Hermann3 1Alaska Fisheries Science Center, RACE...
We investigated subjective and hemodynamic responses towards disgust-inducing, fear-inducing, neutral pictures in a functional magnetic resonance imaging study. Within an interval of 1 week, 24 male subjects underwent the same block design twice order to analyze possible response changes repeated picture presentation. The results showed that disgust-inducing fear-inducing scenes provoked similar activation pattern comparison scenes. This included thalamus, primary secondary visual fields,...
Abstract The brown meagre ( Sciaena umbra ) is an endangered species, which requires specific protection measures to ensure its conservation. These need be informed by high-quality scientific knowledge on their space use patterns. Here, we used acoustic telemetry assess seasonal movement patterns and habitat within a marine protected area (MPA). Our results suggested that S. highly sedentary species (home range < 1.0 km 2 and, therefore, the MPA extensive enough protect local population....
The diel vertical migration (DVM) of Pacific cod Gadus macrocephalus was examined using depth and temperature data from 250 recaptured archival tags deployed on G. in the eastern Bering Sea Gulf Alaska near Kodiak Island. DVM two types, deeper during daytime (type I) night-time II), occurred frequently (15-40% all days) released at sites. Most individuals displayed both with each type behaviour lasting up to 58 contiguous days, day night differences averaging c. 8 m. Despite high...
Abstract Bottom trawl surveys provide fishery‐independent data on relative abundance and life history parameters for a wide range of marine taxa. Survey are used to assess species distribution, biological interactions, ecosystem structure manage resources. Not all bottom types or oceanographic conditions accommodate this survey method. We applied National Ocean Service hydrographic smooth sheets evaluate physical attributes associated with habitat available surveys. Random forests were the...
A geographic information system (GIS) analysis of 5039 bottom trawl events from U.S. west coast surveys (19771998) estimated that the survey area was about 77% trawlable but five 30 strata were less than 50% trawlable. Untrawlable areas, by definition, cannot be surveyed with trawl; however, there has never been a means identifying and excluding these areas relative abundance estimates, which are calculated only hauls completed in portions each stratum. Unknown amounts untrawlable habitat...
We created a new, 100 m horizontal resolution bathymetry raster and used it to define 29 canyons of the eastern Bering Sea (EBS) slope area off Alaska, USA. To create this surface we proofed, edited, digitized 18 million soundings from over 200 individual sources. Despite vast size (~1250 km long by ~3000 high) ecological significance EBS slope, there have been few hydrographic-quality charting cruises conducted in area, so relied mostly on uncalibrated underway files convenience. The lack...