A5003616638- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine animal studies overview
- Hydrology and Watershed Management Studies
- Hydrology and Sediment Transport Processes
- Water Quality and Resources Studies
- Coral and Marine Ecosystems Studies
- Avian ecology and behavior
- Oceanographic and Atmospheric Processes
- Maritime Navigation and Safety
- Sustainability and Ecological Systems Analysis
- Zoonotic diseases and public health
- Aquatic Invertebrate Ecology and Behavior
- Animal Disease Management and Epidemiology
- Arctic and Antarctic ice dynamics
- Marine Biology and Ecology Research
- Animal Vocal Communication and Behavior
- Isotope Analysis in Ecology
- Plant Surface Properties and Treatments
- Crustacean biology and ecology
- Marine and coastal plant biology
- Tree Root and Stability Studies
- Forest Biomass Utilization and Management
- Ocean Acidification Effects and Responses
- Viral Infections and Vectors
University of Washington
2000-2024
Behavioral Tech Research, Inc.
2022
John Muir Health
2020
United States Geological Survey
2016
Mandatory or voluntary reductions in ship speed are a common management strategy for reducing deleterious encounters between large ships and whales. This has produced strong resistance from shipping marine transportation entities, part because very few studies have empirically demonstrated whether to what degree influences ship-whale encounters. Here we present the results of four years humpback whale sightings made by observers aboard cruise Alaska, representing 380 cruises 891 Encounters...
In a search for ocean conditions potentially affecting the extent of Pacific hake (Merluccius productus) feeding migrations, we analyzed data collected in 1995 and 1998 by National Marine Fisheries Service on abundance distribution (by echo integration), intensity alongshore flow (from acoustic Doppler current profiler), temperature (conductivity–temperature–depth profiles). Our results show that are associated with subsurface poleward not specific range. Temporal spatial patterns...
We used a mechanistic movement model within Bayesian framework to estimate survival, abundance, and rate of increase for population humpback whales ( Megaptera novaeangliae ) subject long-term photographic capture–recapture effort in southeastern Alaska, USA (SEAK). Multiple competing models were fitted that differed movement, recapture rates, observation error using deviance information criterion. The median annual survival probability the selected was 0.996 (95% central interval (CrI):...
Lethal ship-whale collisions ('ship strikes') constitute a recurring threat to large cetaceans across the globe. Here we describe 'active whale avoidance' defined as mariner making operational decisions reduce chance of collision with sighted whale. Development and application conceptual model avoidance demonstrated that any activities/operations increase detection at larger ship-to-whale distances can range response options for ship operator, enhancing because (1) opportunities detecting...
Abstract In 2003 a feeding aggregation of southeastern Pacific humpback whales ( Megaptera novaeangliae ) was reported in the Magellan Strait. While Chile established its first marine national park Strait to protect whale habitat, fatal ship strikes remain concern because overlap with busy shipping lane. To better understand population risk, we estimated abundance and survival for this using Bayesian robust‐design mark‐recapture models fit photographic data from 2004 2016. Overall, model...
Sacramento River winter-run Chinook salmon are listed under the Endangered Species Act as and there substantial efforts to estimate, predict, limit mortalities at various stages of their life cycle. One such effort is annual forecast number juvenile entering Sacramento-San Joaquin Delta. The natural-origin Juvenile Production Estimate (JPE) defined juveniles produced from natural spawning areas that enter Delta, its used determine allowable level incidental take state federal pumping...
Abstract The size of an organism is important factor for a variety physiological and ecological processes. For fishes, larger can increase long‐term survival provide population level benefit. Therefore, threatened endangered species management often focuses on supporting high quality habitat that provides growth opportunities. There are numerous characteristics affect growth, including food availability, temperature, complexity. Understanding how responds to types different the first step in...
Spring viremia of carp virus (SVCV) is a rhabdovirus that primarily infects cyprinid finfishes and causes disease notifiable to the World Organization for Animal Health. Amphibians, which are sympatric with cyprinids in freshwater ecosystems, considered non-permissive hosts rhabdoviruses. The potential host range expansion SVCV an atypical species was evaluated by testing susceptibility amphibians native Pacific Northwest. Larval long-toed salamanders
Spawn timing in anadromous Pacific salmon may be especially sensitive to environmental cues such as river temperature and flow regimes. In this study, we explored correlations between peak spawn water endangered Sacramento River winter-run Chinook Salmon. recent drought years, rising temperatures during egg incubation have negatively affected the Salmon population. This paper seeks understand how by staging period prior spawning, releases from Shasta Dam might affect these dynamics. We fit a...
Spawn timing in anadromous Pacific salmon may be especially sensitive to environmental cues such as river temperature and flow regimes. In this study, we explored correlations between peak spawn water endangered Sacramento River winter-run Chinook. recent drought years, rising temperatures during egg incubation have negatively impacted Chinook populations. This paper seeks understand how affected by adult spawner staging, releases from Shasta Dam might affect these dynamics. We fit a...
Spawn timing in anadromous Pacific salmon may be especially sensitive to environmental cues such as river temperature and flow regimes. In this study, we explored correlations between peak spawn water endangered Sacramento River winter-run Chinook Salmon. recent drought years, rising temperatures during egg incubation have negatively affected the Salmon population. This paper seeks understand how by staging period prior spawning, releases from Shasta Dam might affect these dynamics. We fit a...
First posted June 17, 2016 For additional information, contact: Director, Western Fisheries Research Center U.S. Geological Survey 6505 NE 65th Street Seattle, Washington 98115 http://wfrc.usgs.gov/ Resource managers rely on abundance or density metrics derived from beach seine surveys to make vital decisions that affect fish population dynamics and assemblage structure. However, may be biased by imperfect capture lack of geographic closure during sampling. Currently, there is considerable...
Utilization of marine and terrestrial protected areas is fundamentally important for their acceptance success. Yet even appropriate uses can negatively impact resources requiring managers to make decisions as when the impacts become unacceptably large. These be difficult because level at which occur may far below resource persistence threatened. In Glacier Bay National Park, Alaska, must a recurring decision regarding number cruise ships that are allowed enter park each year. Cruise bring...