Researchers used computer models of blue whale habitat off California and the eastern Pacific to identify similar regions in the Northern Indian Ocean where whales are likely to be found. This information will help reduce ship strikes and inform conservation efforts for endangered blue whales.
Dungeness crabs and groundfish such as rockfish and sole are expected to decline due to ocean acidification, while coastal pelagic fish are only slightly affected. The study projects a $220 million annual value decline in Dungeness crab fisheries over the next 50 years.
A new study using acoustic networks has documented a 34% per year decline in Mexico's critically endangered vaquita porpoise. The decline is attributed to resumption of illegal gillnet fishing for totoaba, despite conservation efforts.
Researchers have developed a new model to predict the survival of fish embryos in high temperatures, taking into account the relationship between egg size and water flow. The study found that larger eggs require more oxygen and can survive in slower-flowing waters, but this relationship is not always consistent with laboratory results.
A new forecasting system called WhaleWatch has been developed to predict locations of blue whales off the West Coast. The system produces monthly maps of blue whale 'hotspots' to alert ships where there may be an increased risk of encountering these endangered whales.
Research reveals that brief exposures to low concentrations of crude oil can cause deadly deformities in developing haddock. The study found that haddock eggs are particularly vulnerable to oil compounds, leading to extreme craniofacial deformities and compromising their survival.
Scientists have identified a new species of beaked whale using DNA analysis, with eight known specimens found across the Pacific Ocean. The new species is darker and smaller than the more common Baird's beaked whale, and its genetic differences suggest it represents a distinct species.
A new study found that El Niño climate patterns contributed to a record-breaking marine heatwave in the Northeast Pacific Ocean, lasting for multiple years and affecting marine ecosystems. The research revealed 'teleconnections' between tropical and temperate latitudes, strengthening ocean warming patterns.
Research finds The Blob had a stronger negative impact on marine productivity than El Niño off the West Coast, with ocean warming slowing nutrient flow and reducing ecosystem productivity. The study uses real-time data from autonomous gliders to assess the effects of major climate disruptions.
A new study by NOAA Fisheries and the University of California San Diego estimates that the Eastern Tropical Pacific Ocean provides 'ecosystem services' worth at least $17 billion. The services include commercial fishing ($2.7 billion/year), sport fishing ($1.6 billion/year), and carbon capture ($12.9 billion/year).
A new study by NOAA Fisheries finds that ocean acidification may slow development and reduce survival of Dungeness crab larvae, which are key to the Northwest marine ecosystem. The research suggests that lower pH levels could extend vulnerable larval periods or jeopardize timing in relation to food sources.
A decade-long decline in high-calorie fish prey, such as sardines and anchovies, has led to a decrease in the weight of California sea lion pups. This is because nursing females struggle to support their pups' nutritional needs with lower-calorie alternatives like market squid.
A study found that catch shares management reduced risky behavior in fishing by 79% during stormy weather. This shift in behavior corresponds to a 87% reduction in safety incidents and is expected to lead to fewer injuries, vessel losses, and deaths.
New research documents high levels of algal toxins in Alaskan marine mammals, including whales, walruses, and sea otters. The study finds a major northward expansion of toxin-exposed areas along the Pacific Coast, with implications for human consumption.
Research reveals improved fish numbers, survival, and reproduction in rivers with restored habitats through intensively monitored watersheds (IMWs). Studies show significant increases in juvenile fish populations and survival rates, demonstrating the effectiveness of IMWs in assessing restoration impacts.
Humpback whales' diets reflect surrounding environmental changes, while harbor porpoises recolonize San Francisco Bay and sea otters help restore ecosystem health. New research highlights the West Coast's diverse marine mammals and their responses to climate change.
Research at the Society of Marine Mammalogy's Biennial Conference highlights how climate change is affecting marine mammals globally, introducing new interactions and shifting habitats. Marine mammals, especially in the Arctic, serve as sentinel species reflecting environmental changes.
Mexican authorities instituted an emergency ban on gillnetting to save the critically endangered vaquita, with scientists reporting a hopeful model for sustainable fishing coexistence. Researchers also presented studies on declining polar bears and potential methods to reduce bycatch in non-mechanized fisheries.
Scientists have determined a female bias of 2.83 females to each male among 69 green turtles sampled in San Diego Bay, revealing potential feminization due to climate change. The study provides a safe and effective method for determining the sex of immature turtles using enzyme-linked immunosorbent assay (ELISA).
Scientists have found a strong correlation between the concentration of toxic algae Pseudo-nitzschia and the number of young right whale deaths at Peninsula Valdes. The study suggests that the algae's potent neurotoxin domoic acid may be causing non-lethal effects that affect survival.
International workshop highlights need for better forecasting of long-term trends in harmful algal blooms, which threaten wildlife and economies. Research priorities focus on understanding phytoplankton community structure and developing ecological models to prepare for future scenarios.
A new study documents the fatal connection between urban stormwater and coho salmon survival, but also finds that inexpensive filtration through columns of sand and soil can completely prevent toxic effects. The research demonstrates that coho salmon are an ecological sentinel for urban runoff's harmful effects.
Researchers found that blue whales feed infrequently when krill are sparse and intensively when density increases, consuming more energy from the densest patches. This lunge-feeding strategy allows them to maximize energy gain while conserving oxygen, supporting their massive body size.
Research shows low-level oil exposure leads to later heart defects, weaker swimming, and reduced survival in Alaskan fish populations. Subtle changes in heart formation have delayed but important consequences for first-year survival, determining the long-term abundance of wild fish populations.
A recent study examines the resurgence of major predators on the US West Coast and in Yellowstone, revealing rising conflicts with humans and other species. The researchers suggest multi-species approaches to address these tensions and develop more effective management strategies.
The opah's unique design allows its entire body to maintain an elevated temperature through counter-current heat exchange in its gills. This adaptation enables the fish to swim faster, react more quickly, and see better, making it a high-performance predator in cold waters.
Declines in Pacific herring and surf smelt have been observed in the most densely populated areas of Puget Sound, while jellyfish blooms have increased, diverting energy away from highly productive forage species. This shift may affect larger fish, birds, and marine mammals, highlighting the need for habitat protection and restoration.
Research by NOAA Fisheries found that dolphins consume 80% more oxygen when whistling at higher vocal energy levels, suggesting a biological cost of communication in loud environments. This study supports concerns about vessel traffic and noise impacting marine mammals like Southern Resident Killer Whales.
Recreational anglers' understanding of rockfish biology and fishing practices influences their views on conservation. Education plays a crucial role in garnering long-term support for rockfish recovery.
Low-oxygen zones off the Oregon Coast are affecting fish populations, with some species like Dover sole remaining largely unaffected. The study found that low oxygen levels drive sensitive species away, while others may be pushed into less desirable habitats and grow more slowly.
Research shows that fluctuations in river flows are increasing with climate change, scrounging away salmon eggs and exhausting young fish. Habitat restoration projects and reducing stormwater runoff can ease flooding and peak flows threatening salmon redds.
A new analysis of seven years of bird sightings by volunteer birdwatchers found increasing trends for 14 species, including cormorants and harlequin ducks. The study suggests that these birds may be turning the corner, with positive trends also reported in nesting surveys.
A new study reveals that Dolly Varden, a char species in southeast Alaska, have successfully adjusted their migrations to follow the timing of salmon spawning, ensuring access to a key food source. This adaptability suggests that at least some species may be more resilient to climate-induced changes in migration timing.
A new study predicts eastern Pacific marine species will shift poleward due to climate change, altering fish communities and fishing grounds. The study suggests some species will move into habitats of other marine life to the north, while others may disappear from areas at their southern ends.
Naturally spawned juvenile sockeye are migrating to the ocean and returning as adults at a much higher rate than others released from hatcheries. The analysis indicates that the program to save the species has succeeded in rebuilding populations in the wild, with the species regaining fitness.
Biologists believe the increased return rate of naturally spawned sockeye is high enough for the species to eventually sustain itself in the wild. Naturally spawned fish are returning at rates up to three times higher than those released from hatcheries.