Articles tagged with Whales
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Researchers at University of Queensland conducted hearing tests across ocean off Australian coast, finding humpbacks react to higher frequency sounds than expected. The study provides direct evidence humpbacks are highly sensitive to higher frequencies at the upper end of human hearing range.
Researchers studied diet changes among three whale species, fin, humpback, and minke whales, over 28 years. The study found that whales are adapting their feeding habits in response to limited resource availability and increased competition.
A new study reveals how beluga whales in Alaska's Bristol Bay survive through a surprising strategy: they mate with multiple partners over several years. This polygynandrous system helps maintain genetic diversity despite the population's small size and isolation.
New research reveals that Indigenous communities in southern Brazil hunted large whales 5,000 years ago, long before previously thought. The study provides strong evidence of active hunting and sheds light on the economies, technologies, and lifeways of postglacial societies along the Atlantic coast of South America.
Researchers used drones to collect respiratory droplets from wild whales in northern Norway, detecting cetacean morbillivirus, a potentially deadly virus that causes severe damage. The study highlights the importance of long-term surveillance to understand how emerging stressors shape whale health.
A Harvard-designed bio-logger captures high-fidelity audio of sperm whale codas, which are later analyzed by machine learning models to uncover structured communication. Recent results show that sperm whales have their own alphabet and use vowels and diphthongs in their language.
Researchers found that killer whales and Pacific white-sided dolphins cooperate while hunting salmon in British Columbia waters. The orcas use dolphin echolocation to locate Chinook salmon, which the dolphins then scavenge for food scraps after the orcas eat their share.
Humpback whales are experiencing a significant recovery, with an estimated population of 80,000, thanks to their ability to adapt to changing food sources. Researchers observed humpback whales switching from polar cod to krill in response to changes in the Senyavin Strait ecosystem.
Researchers tested a popular evolutionary theory by comparing maternal length and fetal sex in over 100,000 whales. They found that the fetal sex ratio skews female for longer body size, suggesting that female calves benefit more from heritable fitness than males do. The findings contradict the Trivers-Willard hypothesis.
Researchers at Bigelow Laboratory have developed a new modeling approach that incorporates detailed prey information to improve the prediction of right whale distribution. This approach accounts for the preferences and needs of hungry whales, highlighting the importance of smaller species in their diet.
Beaked whales are recorded in the Foz do Amazonas Basin using passive acoustic monitoring, demonstrating their first documentation in Brazilian waters. The study contributes to understanding cetacean biodiversity and showcases the effectiveness of acoustic monitoring for categorizing elusive sea creatures.
Researchers found that humpback whales use their large pectoral flippers to achieve complex turns, allowing them to corral prey with efficiency. This unique strategy is energetically impractical for other whale species, making humpbacks the only ones capable of bubble-net feeding.
Researchers have developed a 'tap-and-go' approach using specially adapted drones to apply monitoring tags to whales. This innovative method significantly speeds up the process while minimizing human interaction with the animals.
Scientists have discovered a new species of ancient whale, Janjucetus dullardi, from a 26-million-year-old fossil found in Victoria's Surf Coast. The discovery reveals a fast, sharp-toothed predator with a compact body and big eyes.
A team of whale experts discovered that southern resident killer whales regularly use lengths of bull kelp as tools to groom each other during social interactions. The whales fashion the tools by breaking off the ends of kelp stalks and then press them against a partner, rolling them between their bodies for long periods.
A global research team tracked over 100 species of marine animals, revealing key migration patterns and hotspots critical for conservation. The study, MegaMove, uses satellite data to inform a new blueprint for ocean conservation, highlighting the need for targeted mitigation efforts.
A team of scientists from the SETI Institute and UC Davis documented humpback whales producing large bubble rings during friendly interactions with humans. This behavior may offer insights into nonhuman intelligence and aid in the search for extraterrestrial life.
Researchers have uncovered evidence of humans using whale bones as tools from 20,000 years ago, shedding light on the marine ecology of the time and the role whales played in past ecosystems. The study identifies five species of large whales used by early humans.
A UNSW-led study reveals humpback whales are giving birth up to 1500 km north of their previously assumed calving zone in Tasmania. This challenges current beliefs and raises concerns about the vulnerability of newborn whales exposed to risks like boat strikes, entanglements, and pollution.
Researchers found that humpback whales can give birth in temperate waters along their migration route, with calves born as far south as Tasmania. This challenges the long-held assumption that tropical waters are the only nursery for humpback whales.
A new study by ProtectedSeas highlights the potential of marine radar technology to monitor vessel speed violations with 95% confidence. The research found that radar can detect speed violations with high accuracy, enabling effective enforcement of speed limits and prevention of strikes on whale populations.
Researchers found that whales and dolphins use a unique sleep strategy by turning off one half of their brain at a time. This phenomenon is enabled by specific genes and pathways that enable secondary aquatic adaptation.
Whales play a critical role in moving nutrients across ocean basins through horizontal transport in their urine. Scientists estimate that great whales transport approximately 4,000 tons of nitrogen each year to low-nutrient coastal areas in the tropics and subtropics.
Researchers used a novel approach to estimate megalodon's body length and shape, finding it closer in shape to a lemon shark or large whale. The study suggests the prehistoric predator may have reached about 80 feet in length and weighed an estimated 94 tons.
A researcher is using accessible 3D scanning technologies to document and analyze stranded marine mammals, providing precise morphometric assessments and creating interactive visualizations. This approach enhances data collection, democratizes access, and expands the impact of conservation efforts worldwide.
Researchers capture narwhals using their tusks to investigate, manipulate and influence the behavior of Arctic char fish. The study reveals first evidence of likely play, social learning and personality differences among individual narwhal.
Researchers tracked changes in baleen whale song detection over six years, finding correlations with shifts in foraging conditions and food availability. The study's findings suggest that whale song data can provide insights into the health of marine ecosystems and inform conservation efforts.
Researchers propose that timing hypothesis explains the mystery of missing blue whale calves, where births occur in fall and winter, and calves are weaned before returning to feeding areas. This explanation offers alternative insight into high pregnancy rates vs. low sightings of mother-calf pairs.
Researchers at Cornell University have developed a new method using underwater microphones and machine learning to estimate the population of North Atlantic right whales. The study demonstrates how this method can aid in the conservation of these critically endangered species by providing real-time monitoring capabilities. By analyzing...
Researchers at Rutgers University have developed an AI tool that combines whale monitoring and environmental data to predict endangered whale habitat. The tool guides ships along the Atlantic coast to avoid critically endangered North Atlantic right whales, preventing deadly accidents and informing conservation strategies.
Research by University of Washington oceanographers found that whale excrement contains significant amounts of iron, a vital element for phytoplankton growth. The study suggests that the decimation of baleen whale populations may have had larger biogeochemical implications for the Southern Ocean ecosystem.
Researchers uncover statistically significant structures in humpback whale song, mirroring patterns found in all human languages. This breakthrough highlights a deep commonality between humans and humpback whales, showcasing the role of learning and transmission in complex communication systems.
Baleen whale species that flee from killer whales produce calls at deep frequencies undetectable to their predators, while others sing higher-frequency songs that are easily heard. This 'flight' vs 'fight' difference influences all aspects of baleen whale behavior, from migration patterns and communication to mating and feeding habits.
Killer whales in Australia have been confirmed to hunt and consume the livers of white sharks, providing compelling evidence of selective predation. This finding suggests that such events may be more widespread than previously believed, with implications for maintaining ecosystem balance.
Baleen whales face increased risk of boat injuries in densely inhabited regions due to vessel activity. The study analyzed changing whale distributions and reported incidents relative to vessel presence in the Northwest Atlantic.
Researchers have witnessed pre-mating rituals in whale sharks for the first time, shedding light on the species' reproduction habits. The observations suggest that following and biting behaviors by males towards females are common in whale sharks, consistent with other cartilaginous fish species.
A new study published in Science Advances reveals that right whales can survive for over 130 years, with some individuals possibly reaching 150 years. This discovery highlights the impact of human activities on whale lifespans, particularly entanglement in fishing gear and ship strikes.
Researchers used drone imagery to measure calf growth and maternal body condition in Hawaiʻi and Alaska, finding larger females produced larger calves. Humpback whales lose significant weight during lactation, with mothers losing nearly 214 pounds per day.
Humpback whales' reproductive success is linked to maternal characteristics and energy balance. Researchers found fetal growth rates increased with maternal length and energy demands peaked in the final third of pregnancy, coinciding with fasting and migration. This study highlights a vulnerable period for pregnant humpback whales and ...
Researchers observed coordinated attacks by killer whales on whale sharks in the Gulf of California, suggesting specialized hunting techniques. The pod targeted the whale shark's ventral side, exploiting its vulnerability, and extracted nutrient-rich organs from the liver.
The study reveals that blue whales primarily occur in summer and autumn, while fin whales can be heard throughout the year. The data also confirms the sporadic occurrence of blue whales during winter months, which may be related to climate change.
A study suggests that increased marine traffic and noise from wind farm surveys may be contributing to whale deaths. Whales died off the coast of New Jersey near proposed wind farms, leading researchers to investigate the impact of survey work on cetacean populations.
A new study led by the University of Washington found that only about 7% of areas at highest risk for whale-ship collisions have any measures in place. The team identified high-risk regions, including coastal areas along the Mediterranean, Americas, southern Africa, and parts of Asia, where whales and ships are most likely to meet.
A team of researchers analyzed historical marking data from the Discovery Marking Program to investigate Antarctic blue whale population structure. They found frequent mixing among ocean basins, indicating a single circumpolar population. This study provides valuable insights into the conservation of this endangered species.
A new reinforcement learning framework, AVATARS, uses diverse sensor streams to track whales and predict their surface locations. The framework aims to minimize missed encounters and improve data collection for Project CETI.
The Whales & Arctic Vessels Project will research how often and where whales encounter vessels in the high Arctic, addressing a largely unexplored area of marine life. The collaboration aims to gather critical data to inform management strategies and promote global awareness for Arctic whale conservation.
Researchers explored how future changes in the North Water Polynya could impact marine communities. Changes in plankton and fish populations were found to have significant effects on the entire ecosystem. Polar bear numbers are projected to halve due to declining phytoplankton and copepods.
A new study questions current approaches to predicting vessel strikes on whales, revealing notable inconsistencies across different models. The researchers highlight the need for accurate modeling to mitigate against modern-day risks threatening whale survival.
A new study by Duke University finds that deep-diving whales confuse plastic debris with prey items, as its acoustic signature mimics squid. Researchers tested various types of plastic trash and found strong similarities in their acoustic signals compared to whale prey, highlighting the need for more sustainable materials.
A new study reveals a significant correlation between the decline of jumbo squid and the disappearance of sperm whales from the region. The research suggests that sperm whales play a crucial role in controlling energy flow within marine ecosystems, highlighting their importance as indicators of oceanic health.
Researchers used drone footage to study gray whales' foraging behaviors, finding that younger whales use forward swimming while older whales headstand. The study also revealed that bubble blasts help regulate buoyancy while feeding in shallow water.
Researchers analyzed DNA in fecal samples to determine the diet of Alaska and southern resident killer whales. They found that both populations prefer salmon, but differ in when they switch to hunting other fish species. The study provides key insights into the delicate balance between regional abundance of different fish species.
Underwater noise pollution from human activities significantly impacts the ability of orcas to hunt successfully in the Salish Sea. The study found that increased ambient noise levels, particularly around vessel propellers, interfere with echolocation behavior and hunting efforts. This hindrance affects females more than males, potenti...
Researchers found that cetaceans' backbones are highly regionalized, with a shift in vertebral column driving locomotion in aquatic environments. The team developed a computational software, MorphoRegions, to analyze the backbone of each specimen individually.
A new study on baleen whales explores genetic adaptations for survival and size, shedding light on the risks and opportunities for their survival. Genes linked to immunity, ageing, movement, and reproduction were highlighted, providing insights into the evolution of these diverse whale species over 50 million years.
Brooke Flammang's Fluid Loco Lab at NJIT will develop non-invasive tag attachment technology for near real-time tracking of North Atlantic right whales. The project aims to improve conservation and regulation policy decisions with accurate predictions on whale distribution and habitat use.
Researchers discovered that solitary humpback whales in SE Alaska craft complex bubble nets to catch krill, allowing them to capture up to seven times more prey without extra energy. This behavior sheds light on how migratory humpback whales consume enough calories to traverse the Pacific Ocean.
A team analyzed 45 zooarchaeological remains and compared findings with contemporary data to assess the effect of sustained subsistence harvests on beluga genetic diversity, population structuring, and foraging ecology. The study found no significant changes in genetic diversity or population structuring over time.
Researchers detected a 24-hour cycle of diving during the spring, with whales swimming deepest in the afternoon to track prey. Two bowhead whales were found to dive in synchrony over a week at a time, even when separated by up to 100 km.
A new study has found that tracking and disposing of whale remains offshore can have significant ecological benefits, including retaining nutrients within the marine ecosystem. The research used a 14m humpback whale as a test subject and successfully predicted its drift trajectory, allowing for more effective management of whale remains.