Articles tagged with Whaling
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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.
Scientists studied thousands of public photos to track humpback whale populations, finding they're responding to food availability changes affected by climate change. The population declined by 7,000 individuals from 2012 to 2021 due to a massive marine heatwave and reduced prey.
Two ancient species of whales, the North Atlantic right whale and the grey whale, disappeared from European waters centuries before industrial whaling began. Archaeological analysis of 719 whale bones reveals that early whaling had a devastating impact on these species.
A new genomic study reveals that whaling in the 20th century destroyed 99% of the Eastern North Pacific fin whale breeding population, but genetic diversity remains high enough to support conservation efforts. The study's findings highlight the importance of enforcing the international whaling ban to aid fin whale recovery.
A genetic study has decoded the lineage of 'Old Tom,' a famous killer whale in Australia, and found ancestral connections to modern-day New Zealand orcas. The research also reveals that the killer whales of Eden may have become extinct locally due to a lack of shared DNA with other killer whales globally.
A study from Oregon State University found that commercial whaling in the 20th century led to a loss of maternal DNA lineages among blue and humpback whales, potentially resulting in cultural memory loss. Whale populations near South Georgia Island have begun to recover, but the genetic diversity remains low.
A team of scientists used a new method to estimate mutation rates in wild whale populations, revealing higher rates similar to smaller mammals. This led to a significant revision of previous estimates, suggesting that only 20,000 humpback whales remained in the North Atlantic before commercial whaling.
The study of two Antarctic blue whales tagged in the east Antarctic sector of the Southern Ocean reveals significant logistical challenges and provides initial insights into foraging ecology, habitat preferences, distribution, movement rates, and feeding patterns. The satellite tracks will assist the International Whaling Commission's ...
In a breakthrough observation, scientists documented large groups of southern fin whales feeding together in the Antarctic for the first time since the whaling ban. The discovery suggests that fin whale populations are rebounding, with numbers reaching up to 150 individuals.
The article examines blue whale whaling records from the North Atlantic, revealing a sharp decline in populations during large-scale exploitation. However, after regulation and moratoriums, the species has recovered due to protection measures.
New research reveals that blue, fin and humpback whales consume an average of three times more food each year than scientists previously estimated. This increased consumption plays a crucial role in maintaining ocean health and productivity by recycling key nutrients.
A recent workshop report emphasizes the significant ecological importance of whales in maintaining healthy oceans. Whales help mitigate climate change through nutrient transport and carbon sequestration, while also enhancing marine productivity and promoting biodiversity.
A team of researchers has discovered a new population of blue whales in the western Indian Ocean, identified by their unique song. The population is thought to spend most of its time in the northwestern Indian Ocean, challenging previous assumptions about whale migration patterns.
After being wiped out by whaling, blue whales have made a comeback to South Georgia, with 58 sightings reported in a 2020 survey and numerous acoustic detections. The discovery is key evidence in learning how the species is recovering following a ban on commercial whaling.
A new study estimates that the western South Atlantic humpback whale population has grown to 25,000, recovering more quickly than previously thought. The population was depleted to only 450 whales in the early 1900s due to intense whaling pressure.
Baleen whales experienced chronic stress from whaling, ship noise, and sea-surface temperature changes over nearly 150 years. Cortisol levels peaked in the 1960s during whaling's peak and remained high after WWII, indicating a persistent impact of human activities.
Researchers from Uppsala University have discovered evidence of large-scale whaling in north Scandinavia dating back to the mid-6th century CE. The production of whalebone gaming pieces reveals a regular supply of whalebone was needed, indicating extensive whaling practices.
A team of researchers is conducting a five-week survey to investigate the health of southern right whales in their feeding grounds off South Georgia. The study aims to unravel the mystery of high calf mortalities and understand how environmental conditions influence breeding success.
Scientists analyzed historic whale data to identify early warning signals of impending population collapse. They found significant declines in body size and fluctuations in numbers up to 40 years before documented collapses.
Historic logbook records and computer modeling were used to assess the population's trajectory, finding numbers fell to less than 100 animals between 1914 and 1926. Today, only 12% of pre-industrial levels remain, with conservation strategies crucial for protection.
A recent study published in the Royal Society Open Science journal has made the first-ever field observations of Omura's whales off the coast of Madagascar. The research team observed 44 groups of whales, collected skin biopsies from 18 adult whales, and recorded song-like vocalizations that may indicate reproductive behavior.
The Solomon Islands study highlights the increasing vulnerability of small cetaceans worldwide, with over 15,000 dolphins killed by villagers from 1976 to 2013. The drive-hunting of dolphins in the Solomon Islands is a significant threat to their survival, with the hunt being as much about culture as economic value.
Researchers tracked a critically endangered whale migrating over 14,000 miles from Russia to Mexico, raising questions about its status and potential genetic link to eastern gray whales. The study challenges past assumptions of distinct species and highlights the need for closer examination.
The California blue whale population has rebounded to near historical levels, according to new research. The recovery is attributed to careful management and conservation measures, rather than ship strikes or other human-caused factors.
A genetic analysis reveals that North Atlantic humpback whales once existed in numbers of over 100,000 individuals, with an estimated range of 45,000 to 235,000. The study's findings provide a more accurate estimate than previous catch data and have significant implications for determining the recovery threshold of the species.
Researchers estimate that the ocean was even louder 200 years ago due to whales' vocalizations. New data suggest that human-generated noise in modern oceans is just a small increase compared to natural whale sounds.
Scientists have conducted the first range-wide genetic analysis of bowhead whales using ancient DNA samples from archaeological sites and modern populations. The study reveals differences in population diversity between ancient and modern times, suggesting recent disappearance of unique maternal lineages due to habitat loss and whaling.
Researchers have discovered a sensory organ at the tip of the whale's chin, lodged in the ligamentous tissue connecting its two jaws, which sends information to the brain to coordinate the complex mechanism of lunge-feeding. This discovery may help explain why rorqual whales are able to achieve such enormous sizes.
A genetic survey of Antarctic blue whales found a surprisingly high level of diversity among the surviving population, which may help them slowly rebound from catastrophic decimation. The study tracked individual movements and revealed some whales traveled over 6,650 kilometers in four years.
Researchers suggest allocating sustainable annual whale-catch quotas to members of the International Whaling Commission, making them tradable in a global market. This approach could reduce whales harvested annually from two thousand to zero, according to proponents.
A study by Oregon State University scientists has confirmed that whale meat sold at a Los Angeles sushi restaurant came from a sei whale killed in Japan's scientific whaling program. Genetic testing also revealed similar products were sold in Seoul, South Korea, underscoring the ongoing illegal trade of whalemeat products.
A recent study published in Molecular Ecology suggests that Antarctic minke whale populations have not increased due to commercial whaling. The research estimates the long-term population size of Antarctic minke whales to be around 670,000 individuals, similar to current estimates from sighting surveys.
A massive genetic analysis of over 1,500 whale DNA samples has revealed new insights into the population dynamics and relationships of Southern Hemisphere humpback whales. The study provides a detailed understanding of gene flow between populations and highlights the complex interactions within marine ecosystems.
A new form of unregulated whaling is emerging along Japan and South Korea's coastlines, threatening minke whale stocks. DNA analysis reveals that up to 300 whales may be killed annually through bycatch whaling, equivalent to Japan's scientific whaling program.
A Russian-American research team has made significant discoveries about the origins of whaling culture in the Arctic region. The findings suggest that prehistoric cultures were hunting whales at least 3,000 years ago, with evidence found at the Un'en'en site on the Chukotka Peninsula.
A new study reveals that gray whale populations are significantly lower than their historical estimates, suggesting a reduced food supply due to climate change and altered Arctic ecosystems. The findings also indicate that the current population is too small to play its natural role in ocean ecology.
A study on bowhead whale population dynamics has helped maintain a quota for Eskimos to harvest 56 whales per year, supporting their traditional food source. The research suggests that the whale's population is increasing, allowing it to thrive under sustainable management.
A study analyzing whale meat sold in Korean markets suggests the number of whales being sold for human consumption is much higher than reported to the International Whaling Commission. The researchers estimate that nearly twice as many minke whales passed through Korean markets between 1999 and 2003 as were officially reported.
A five-year study by University of Utah biologists reveals that giant whales split into three species around 5-6 million years ago, and all three were equally abundant before whaling reduced their numbers. The study used the genetics of whale lice to track the genetic evolution of whales.
Recent advances in genetics have revolutionized whale research, revealing surprising tales of population sizes. Marine biologist Steve Palumbi's work has sparked controversy, but also led to a deeper understanding of humpback whales' population history, estimated at 1.5 million before commercial whaling.
Three scientists say current sanctuary plan lacks scientific basis, fails to consider migratory whale behavior and other threats. Refined conservation program using Revised Management Procedure (RMP) would be more effective in protecting whale populations.
Researchers found that prehistoric Inuit whalers dramatically altered high Arctic pond ecosystems through their hunting practices over 800 years ago. The team's study revealed a significant increase in moss growth and nutrients in the water, coinciding with deposits of nutrient-rich whalebones and other refuse.
A study by geneticists from Stanford and Harvard Universities reveals that humpback, fin, and minke whale populations in the North Atlantic were much higher before commercial hunting. The researchers estimated that there were around 800,000 to 900,000 whales, contradicting previous whaling records.
A joint research project is underway to locate and evaluate the condition of sunken whaling vessels lost off Alaska's north coast in 1871. The expedition, led by the West Coast and Polar Regions Undersea Research Center, utilizes side-scan sonar and a remotely operated vehicle (ROV) provided by NASA.