A5077256759- Marine animal studies overview
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Coral and Marine Ecosystems Studies
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Marine and coastal plant biology
- Maritime Navigation and Safety
- Underwater Acoustics Research
- Ecology and Vegetation Dynamics Studies
- Cephalopods and Marine Biology
- Rangeland Management and Livestock Ecology
- Identification and Quantification in Food
- Coastal and Marine Management
- Aerospace Engineering and Energy Systems
- Arctic and Russian Policy Studies
- Isotope Analysis in Ecology
- Underwater Vehicles and Communication Systems
- International Maritime Law Issues
- Genetic diversity and population structure
- Marine Biology and Ecology Research
- Noise Effects and Management
- Evolution and Paleontology Studies
- Maritime Transport Emissions and Efficiency
- Genetic and phenotypic traits in livestock
New England Aquarium
2020-2025
Cabot (United States)
2020-2025
NOAA National Marine Fisheries Service
2012-2021
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2011-2021
National Oceanic and Atmospheric Administration
2013-2021
NOAA National Marine Fisheries Service Southeast Fisheries Science Center
2015
University of California, Berkeley
2002-2005
University of California System
2005
At a landscape scale, the combined influence of biotic and abiotic factors may determine distribution patterns large herbivores in African savanna ecosystems. Herbivores foraging these ecosystems become nutritionally stressed during an annual dry season when both forage quality quantity are reduced. Additionally, locations water sources impose landscape-scale constraint on dry-season herbivore distributions. We used logistic regression to analyze 13 years aerial census data collected Kruger...
Abstract Marine spatial planning provides a comprehensive framework for managing multiple uses of the marine environment and has potential to minimize environmental impacts reduce conflicts among users. Spatially explicit assessments risks key species from human activities are requirement planning. We assessed risk ships striking humpback (Megaptera novaeangliae), blue (Balaenoptera musculus), fin physalus) whales in alternative shipping routes derived patterns traffic off Southern...
Abstract Aim Changes in abundance and shifts distribution as a result of warming climate have been documented for many marine species, but opportunities to test our ability forecast such changes limited. This study evaluates the habitat‐based density models accurately cetacean during novel year with unprecedented warm ocean temperatures caused by sustained heatwave. Location California Current Ecosystem, USA. Methods We constructed generalized additive based on sighting environmental data...
Species distribution models are now widely used in conservation and management to predict suitable habitat for protected marine species. The primary sources of dynamic data have been situ remotely sensed oceanic variables (both considered “measured data”), but ocean can provide historical estimates forecast predictions relevant such as temperature, salinity, mixed layer depth. To assess the performance modeled species models, we present a case study cetaceans that compares based on output...
Abstract Species distribution models (SDMs) are important management tools for highly mobile marine species because they provide spatially and temporally explicit information on animal distribution. Two prevalent modeling frameworks used to develop SDMs generalized additive (GAMs) boosted regression trees (BRTs), but comparative studies have rarely been conducted; most rely presence‐only data; few explored how features such as characteristics affect model performance. Since the majority of...
Abstract The global distribution of fin whales B alaenoptera physalus is not fully understood. Existing maps can be divided into two conflicting categories: one showing a continuous and another an equatorial hiatus (gap in the distribution) between approximately 20° N S . Questions also remain about seasonal whales. To explore suggested patterns, we synthesised information on whale post‐whaling era (1980–2012) from published literature, publicly available reports studies conducted by various...
Abstract Aim Human activities are creating conservation challenges for cetaceans. Spatially explicit risk assessments can be used to address these challenges, but require species distribution data, which limited many cetacean species. This study explores methods overcome this limitation. Blue whales ( Balaenoptera musculus ) as a case because they an example of that have well‐defined habitat and subject anthropogenic threats. Location Eastern Pacific Ocean, including the California Current...
Species distribution models that predict species occurrence or density by quantifying relationships with environmental variables are used for a variety of scientific investigations and management applications. For endangered species, such as large whales, help to understand the ecological factors influencing variability in distributions assess potential risk from shipping, fishing, other human activities. Systematic surveys record presence absence, well associated search effort, but very...
Despite the increasing frequency and magnitude of extreme climate events, little is known about how their impacts flow through social ecological systems or whether management actions can dampen deleterious effects. We examined record 2014-2016 Northeast Pacific marine heatwave influenced trade-offs in managing conflict between conservation goals human activities using a case study on large whale entanglements U.S. west coast's most lucrative fishery (the Dungeness crab fishery). showed that...
Climate change is affecting species distributions in space and time. In the Gulf of Maine, one fastest-warming marine regions on Earth, rapid warming has caused prey-related changes distribution critically endangered North Atlantic right whale (Eubalaena glacialis). Concurrently, whales have returned to historically important areas such as southern New England shelf waters, an area known been a whaling ground. We compared aerial survey data from two time periods (2013-2015; 2017-2019) assess...
1 Formation locomotion theoretically provides energy savings and it is evident across diverse taxa. Echelon position, described in cetacean (dolphin whale) mother–infant dyads as calf very close proximity of its mother's mid-lateral flank, may be a type formation that hydrodynamic benefits for the calf. Until now, difficulties associated with assessing swimming energetics marine mammals have precluded empirical quantifications these benefits. 2 Through kinematic analyses, this study...
Constraints on locomotion could be an important component of the cost reproduction as carrying increased load associated with eggs or developing fetuses may contribute to decreased locomotor performance for females across taxa and environments. Diminished increase susceptibility predation, yet mechanism(s) by which gravidity pregnancy affect remains largely unexplored. Here we demonstrate that morphology, hydrodynamics kinematics were altered during pregnancy, providing a mechanism...
Methods to evaluate strategies reduce the risk of vessels striking whales are needed balance species protections with economic consequences. Previously used simplistic methods do not include important elements vessel-strike risk. More complex often parameters that have been estimated for whales. Additionally, whale and vessel metrics in all because they may lead biases reductions. We build a simple metric, Total PLETHd, from three components: (1) relationship between speed probability strike...
After the near-complete cessation of commercial whaling, ship collisions have emerged as a primary threat to large whales, but knowledge collision risk is lacking across most world’s oceans. We compiled dataset 435,000 whale locations generate global distribution models for four globally ranging species. then combined >35 billion positions from 176,000 ships produce estimate whale-ship risk. Shipping occurs 92% ranges, and <7% hotspots contain management strategies reduce collisions....
Spatial risk assessments are an effective management tool used in multiple-use marine parks to balance the needs for conservation of natural properties and provide varying socio-economic demands development. The Great Barrier Reef Marine Park (GBRMP) has recently experienced substantial increases current proposed port expansions subsequent shipping. Globally, large whale populations recovering from commercial whaling ship strike is a significant threat some potential welfare issue others....
Assessments of ship-strike risk for large whales typically use a single year ship traffic data and averaged predictions species distributions. Consequently, they do not account variability in or Variability could reduce the effectiveness static management measures designed to mitigate risk. We explore consequences interannual on using multiple years both predicted fin, humpback, blue whale distributions off California. Specifically, was estimated four regions that are important management....
Incorporating the effects of climate change in species management strategies is one today's greatest conservation challenges. Mechanistic models can be used to address these challenges because they explain how cascade through ecosystems and influence distributions. We structural equation test hypotheses about cascading basin-scale variables on local abundance North Atlantic right whales, a critically endangered species, historically important feeding habitat. found that Oscillation,...
Abstract Aim Ship strikes are one of the largest sources human‐caused mortality for baleen whales on West Coast United States. Reducing ship‐strike risk in this region is complicated by changes ship traffic that resulted from air pollution regulations and economic factors. A diverse group stakeholders was convened to develop strategies reduce Southern California Bight. Strategies proposed some included: (a) adding a shipping route; (b) expanding existing area be avoided (ATBA); (c) reducing...
Abstract Species distribution models (SDMs) are a valuable statistical approach for both understanding species distributions and identifying potential impacts of environmental changes or management decisions to species, but multiple SDMs the same in region can create confusion decision‐making processes. One solution is ensembles (i.e. combinations) predictions from existing SDMs. However, creating be challenging if were made at different spatial resolutions, using data sources, with...
Abstract Aim Species distribution models (SDMs) are a widely used tool to estimate and map habitat suitability for wildlife populations. Most studies that model marine mammal density or distributions use oceanographic proxies prey. However, could be problem forecasting because the relationships between prey may change in changing climate. We examined of model‐derived estimates SDMs using an iconic species, western Arctic bowhead whale ( Balaena mysticetus ). Location Western Beaufort Sea,...