Articles tagged with Seabirds
Researchers used soundscape analysis to evaluate restoration efforts on Western Aleutian Islands, finding that acoustic diversity and complexity indicate ecosystem health. The approach could assess restoration outcomes at a fraction of the effort required for traditional methods.
A study found that climate change impacts Arctic Terns' behavior and distribution in Antarctica, affecting their main food source of krill and habitat. The birds converged on the Shackleton Ice Shelf during a period of reduced krill abundance, highlighting the vulnerability of the species to climate change.
A new study reveals that North Sea fishing vessels discard over 267,000 tonnes of fish, enough to feed 3.45 million birds, and this figure has declined since 1990. The discarded fish support scavenging bird species, with the largest declines observed in northern fulmars, black-legged kittiwakes, and herring gulls.
The study found that removing invasive mice from the Farallon Islands would reduce the presence of overwintering burrowing owls, which in turn would decrease mortality rates among ashy storm-petrels. The researchers project a stable or increasing population trend for the threatened bird species.
Seabirds (Manx shearwaters) use spatial cognition to navigate back to their home colonies with accurate directional knowledge. However, they do not encode specific routes or anticipate obstacles encountered during foraging trips.
Researchers found higher levels of stress hormone corticosterone in white-tailed sea eagles near paths or roads, but not on breeding success. Protection zone regulations may need adjustment to prevent negative effects on breeding performance.
According to a study published in Global Change Biology, the breeding season of some Arctic seabirds is shifting earlier due to global warming. The study found that surface-feeding seabirds in the north Pacific Ocean are moving their breeding season about ten days before the rest of species over the last thirty-five years.
European shags follow social cues by watching fellow birds to determine the best time and place to dive. This behaviour may help them save energy and find fish more efficiently. The study sheds light on the importance of understanding seabird species' adaptability in response to environmental pressures.
Scientists at Tokyo University of Agriculture and Technology found that hazardous chemicals from plastics ingested by seabirds accumulate in their tissues. The study detected additives such as UV stabilizers and brominated flame retardants in 4.6% and 2.1% of seabird samples, respectively.
A study found that plastic ingestion can have a significant negative impact on seabirds, causing reduced blood calcium levels, body mass, and kidney function. The research also revealed that the simple presence of plastic is enough to cause negative consequences, regardless of the amount.
A study published in Journal of Avian Biology reveals that puffins, guillemots, and razorbills dive to varying depths during the non-breeding period. Contrary to expectations, puffins dive less deeply than closely related species, suggesting they catch different prey.
A mass die-off of puffins and Crested auklets was recorded in the Bering Sea due to climate-driven food shifts, with reduced prey resources potentially leading to starvation. The study suggests that future research should investigate seabird resilience in a changing environment.
A study published in Ecology found that baby tiger sharks eat a variety of terrestrial birds, including songbirds like sparrows and woodpeckers. The sharks' stomachs contained remains from 41 out of 105 juvenile sharks, revealing a diet that includes land-dwelling bird species.
Researchers observed Herring Gulls developing a complicated behavior to 'skin' sea creatures, making them safe to eat. The birds grasp the sea squirt's tunic in their beaks, shake it to loosen the soft edible inner body, and then switch to hold and shake again until the inedible outer layer is removed.
A Norwegian University of Science and Technology (NTNU) team deployed an autonomous underwater vehicle to collect data on phytoplankton, which form the base of the marine food chain. The AUV created a 3-D map of hot spots, providing clues about declining seabird populations.
A new study found that balloons are the most lethal marine debris for seabirds, with a single piece killing 20% of seabirds and nine pieces killing 50%, while blockages or infections caused by gastrointestinal obstructions were leading causes of death
Alaska's longline fisheries have reduced seabird bycatch by 77-90% since adopting streamer lines in 2002, saving thousands of birds per year. However, recent years have seen an increase in bycatch rates, particularly for albatrosses and northern fulmars.
Researchers from Wake Forest University found that female Nazca boobies have a shorter lifespan due to their high reproductive activity. The study suggests that the females' efforts to raise their chicks and find new mates may contribute to their shorter lives.
A study led by the University of Birmingham found that poor diet is partly responsible for the decline of a major Atlantic seabird nesting colony. The researchers analyzed feathers from over 180 specimens and found that changes in the birds' diets coincided with their population decline.
Global seabird food consumption decreased by 13 million tonnes between 1970 and 2010, while fisheries increased their catches of prey species. Seabirds are facing extinction due to unfair competition with massive vessels for food, entanglement in fishing gears, and plastic waste.
A new study uses tagged seabirds to measure ocean currents and track tidal patterns. This non-invasive method could provide crucial data for the marine renewable energy industry, helping identify sites for tidal energy generation.
A study of European shag diet composition found a dramatic shift from sandeel to other fish species, with potential implications for survival and population trends. Climate change may be driving this shift, highlighting the need for conservation efforts to mitigate its effects.
A study found that at least 17 white-tailed sea eagles died from avian influenza virus H5N8 in Northern Germany during the winter of 2016/2017. The analysis revealed that the virus was highly aggressive and caused a lethal inflammation of the brain, with no evidence of lead poisoning as a cause.
Researchers developed models that predict the month-by-month movements of longline fishing fleets on the high seas. These predictions can help regulatory agencies pinpoint potential hotspots where by-catch risks are greatest and take proactive measures to reduce accidental kills.
Researchers discover pyrosomes, known as 'sea pickles,' are thriving in colder waters off the Oregon coast, potentially disrupting regional fishing operations and food webs. The invasive species may be capitalizing on nutrient-poor conditions to feed on plankton, leading to systemic changes in the ecosystem.
Scientists discovered spectacled cormorant fossils in Japan dating back 120,000 years, indicating the bird's previously believed limited range was incorrect. Climate changes and human activity may have contributed to the species' extinction, with more research needed on its biological aspects.
New research highlights the critical impact of invasive rats on coral reef ecosystems, leading to severe ecological harm. Rat eradication is proposed as a high conservation priority to restore seabird-derived nutrient subsidies, benefiting terrestrial ecosystems and coral reefs.
International researchers found that illuminating gillnets with green LED lights reduced guanay cormorant deaths by 85%. This technology also reduced sea turtle catches by 64%, offering a cheap and effective way to reduce bird and turtle mortality in fishing.
A new study led by Francisco Ramírez from the University of Barcelona identifies key areas to protect 20% of sea bird populations in Patagonia. The research uses a multidisciplinary approach to define marine areas of interest in conservation, considering ocean currents and coastal ecosystems.
Researchers found that changes in sea surface temperature during late winter have a significant impact on juvenile survival, with reduced food availability due to warmer waters. The study suggests that climate change will lead to a faster decline in albatross populations.
A study finds that doubling the frequency of El Niño events may lead to higher population numbers and a lower chance of extinction for Brandt's cormorants. The birds' ability to cope with environmental changes is improved when El Niños are interspersed with favorable La Niña phases.
Researchers from Far Eastern Federal University found that pesticides are accumulated in the fat tissue of seabirds and marine mammals. The study, published in Marine Pollution Bulletin, showed high levels of organochlorine pesticides in these organisms, particularly in those with higher fat content.
North Pacific seabirds' prey preferences have shifted from fish to squid over the last 125 years, driven by commercial fishing and climate change. The findings suggest massive changes in ocean ecosystem structure, with species declining in trophic position and squid consumption increasing.
A new study found that Hookpod devices can effectively reduce seabird bycatch in pelagic longline fishing. By reducing bird deaths, these devices may help save threatened albatross species from extinction.
Researchers tracked individual albatrosses for their entire lives to identify intrinsic quality that drives performance, including reproductive success and longevity. The study found that birds born in warmer years were smaller and performed poorly, while those from denser populations had reduced success.
Climate change is altering Scotland's seabirds' diet, with European Shags increasing their diversity of fish prey. Warmer waters signal changes in sandeel availability and hunting habits, potentially impacting conservation efforts.
A new animal movement model reveals seabirds orient themselves over an ocean and compensate for wind drift without landmarks, hinting at a 'map sense'. This breakthrough paves the way for analyzing animal decision-making using GPS tracking data.
A study published in Nature Communications found that migratory shorebirds are declining due to dependence on mudflats in the Yellow Sea. The researchers analyzed citizen science data and found that even brief visits to the mudflats were crucial for population trends.
A new study found that puffin pairs that migrate close together have higher breeding success rates. Female winter foraging efforts also play a crucial role in determining pair breeding success. The study used geolocators to track the migratory movements of 12 pairs of Atlantic Puffins, revealing that pairs following similar migration r...
Researchers are investigating whether seabirds use infrasound for navigation as they travel millions of kilometres across the ocean. The study aims to shed light on one of nature's unsolved questions and uncover how birds find their way year after year.
In a study published in The Wilson Journal of Ornithology, researchers found that fully grown Galapagos penguins who have fledged from their nests continue to beg for food from their parents. This post-fledging parental care is thought to be an adaptation to the fluctuating availability of food in the Galapagos archipelago.
Researchers found that nonresident seabirds concentrate their foraging efforts near Cordell Bank along the continental shelf break in Central California. This study identifies high-use foraging sites as a critical component of ocean conservation efforts.
Researchers at San Francisco State University developed a new study that models nonresident seabird foraging distributions to inform ocean zoning. The study could help protect foraging seabirds along the Central California coastline and prioritize conservation efforts.
Bacteria play a crucial role in determining the health of birds at the top of the food web. Seabirds feeding in areas rich in sulfate-reducing bacteria have high levels of mercury. This study suggests that bacteria provide a buffer to variation in mercury within the environment.
Researchers discovered that marine plastic debris emits a sulfurous compound, dimethyl sulfide, which attracts seabirds with keen sense of smell. This olfactory cue tricks birds into eating plastic, making them more likely to consume it than other species.
Researchers found that gannets use shallow and short dives with less swimming when at ocean fronts, indicating abundant food closer to the surface. This study highlights the importance of these habitats for marine ecosystem functioning and could inform conservation efforts.
Researchers found that Manx shearwaters suffered decreased breeding success when they had to spend more time rearing chicks, leading to delayed migration and reduced resting time. This study provides insights into the consequences of carry-over effects on migratory birds' annual cycles.
Researchers found that birds can engage in slow wave sleep and rapid eye movement sleep while flying, with SWS occurring in one hemisphere or both hemispheres. The study revealed unique sleep patterns in flight, including the ability of birds to watch their surroundings while asleep.
Industry self-monitoring of small offshore oil spills is inadequate, leaving a gap in understanding the impact on seabird populations. Chronic pollution from small spills may have greater population-level impacts than single large spills.
Seabirds nest in areas where food is concentrated due to ocean currents and climate. The locations of nearly two million seabird colonies along Norway's coast north of the Arctic Circle are influenced by fish larvae hot spots.
Researchers analyzed old tourist photos to reconstruct the rise and fall of common guillemot populations on Stora Karlsö. The study found a significant increase in population size, with numbers more than five times bigger than in the early 20th century.
Researchers at Monash University found that drones are more precise than traditional ground counts for monitoring seabird colonies. Drones' down-facing perspective reduces the likelihood of missing birds and provides a more accurate count.
Researchers used autonomous acoustic sensors to detect and record marbled murrelet calls, identifying over 19,000 potential calls and confirming 7,218 actual calls. This technology offers a viable alternative to traditional surveys, enabling broader, more cost-effective searches for these endangered seabirds.
Examination of fishing hooks and baits reveals conflicting impacts on sharks and rays, with some methods potentially increasing catch and injury while others help sea turtles and other species.
A 50-year study on southern giant petrels in Antarctica shows a halved population and declining breeding success. Breeding success dropped from 60% to 40% between 1996 and 2015 in selected colonies. The decline is of conservation concern, with the species' global population around 50,000 pairs.
Researchers from Alfred Wegener Institute discovered plastic litter on the Arctic sea surface, with 31 pieces found in a 5,600km survey. The litter is likely to pose new challenges for Arctic marine life, which has already seen high levels of plastic pollution in its stomachs.
The Government of Chile has announced a plan to design a network of Marine Protected Areas for Patagonia's unique wildlife and ecosystems. With funding from the Waitt Foundation, the new MPA network will protect over 100,000 square kilometers of oceanic waters, meeting Chile's goal of 10% ecosystem protection by 2020.
Researchers predict that 90% of all seabirds alive today have eaten plastic, with the majority having it in their gut. Plastic ingestion causes gut impaction, weight loss and death, affecting marine biodiversity.
A new study estimates that almost all seabirds have consumed plastic, with 90% of individual birds ingesting some form of plastic. This widespread impact is a concern, as plastic ingestion can cause gut impaction, weight loss, and death in seabirds.
Researchers found that stronger winds forecasted by climate change could exacerbate the time females take to find food compared to males, affecting their wellbeing and potentially population sizes. This study on UK coastal seabirds highlights the impact of wind conditions on bird behavior.