Articles tagged with Animal Migration
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Researchers at Oregon State University found that newly-hatched salmon use the geomagnetic field to orient themselves vertically when emerging from gravel nests. This ability allows them to navigate three-dimensionally and orient themselves in their environment, which is crucial for survival.
New research confirms maritime winds displace seal pups by hundreds of kilometers during their first winter migration. The study found that strong winds can increase pup displacement, but the impact on survival is unclear.
Researchers at Rothamsted Research used radar data to track the migratory patterns of a large bat colony in Texas, revealing changes in seasonal habits and winter residency. The findings suggest that bats are arriving earlier in the spring due to environmental shifts, with potential implications for pest management and agricultural pro...
Recent research reveals that even weak Moonlight and aurora-induced light can trigger a rapid migration of Arctic zooplankton to deeper waters. This phenomenon is caused by the animals' extreme sensitivity to light, which can be disrupted by light pollution from vessels or ocean structures.
A new University of Washington study reveals that human fishing seasons disproportionately target certain fish, altering life history patterns and reducing population diversity. This can have significant impacts on the ability of fish to adapt to climate change.
Researchers found that migratory female butterflies make distinct physiological changes to invest in flight over reproduction during migration. They remain reproductively inactive and carry a lighter abdomen to optimize energy use. This strategy allows them to breed at the end of the migration, producing large numbers of eggs.
A new mathematical model has been developed to analyze the relationship between population migration and living standards. The study found that wealth distribution is closely tied to population dynamics, with resources flowing from developed countries to poor regions through trade and investment.
A study found a dramatic genetic rift between bat populations on either side of the Northwest and Northeast Providence Channels in the Bahamas. The researchers suggest that bats from Florida colonized the northern islands while those from other parts of the Caribbean likely colonized the southern Bahamas.
Researchers used DNA analysis to uncover the genetic basis of early migration in Pacific salmon species, finding a single gene variant responsible for this adaptation. This discovery challenges previous views on the evolution of early migrating populations and highlights the need for targeted conservation strategies.
Recent damming has drastically reduced the migration opportunities of fish species, leading to lost habitat and river connectivity issues. The lack of pre-1950 data on ecological harm may underestimate the effects of damming.
The article highlights the devastating impact of damming and lost connectivity on anadromous forage fish in northeastern ecosystems. The authors report that these fish exist at only a tiny fraction of their previous populations due to habitat loss and fragmented landscapes.
The copepod Calanus finmarchicus uses a genetic clock to regulate its daily vertical migration, which is likely the largest daily movement of biomass worldwide. This internal rhythm influences the entire food web in the North Atlantic and has significant implications for marine ecosystems.
A new study reveals how mass wildebeest drownings impact the ecology of the Mara River. The research found that wildebeest carcasses provide a rich source of nutrients to the river's food web, supporting fish and scavenger populations. This subsidy delivers terrestrial nitrogen, phosphorus, and carbon to the river.
The study found that wildebeest carcasses play a crucial role in the ecosystem, providing food for various animals and supporting fish populations. The nutrient-rich carcasses also decompose over time, releasing phosphorus that supports algae, insects, and fish.
Researchers use aGPS tool to reconstruct ancient DNA, revealing complex and dynamic migration patterns across Europe. The study confirms the theory of massive Yamnaya migration to Central Europe and sheds light on ancient city-state formation.
New research reveals a negative association between glyphosate application and local abundance of adult monarch butterflies in the Midwest. Habitat loss and climate change are also contributing factors to the species' decline.
Researchers found that migratory mule deer closely time their movements to track the timing of early spring green-up, allowing them to access high-quality forage. The study's findings highlight the importance of habitat corridors in enabling animals to move between winter and summer ranges.
Scientists tagged 47 humpback whales with satellite transmitters in the southeast Pacific to understand their breeding area movements. The study revealed that individuals move between countries within the breeding season and that their entire breeding area extends approximately 2,600 kilometers of non-straight coastline.
Researchers have recorded spring fish migrations by analyzing DNA in water samples, providing a harmless and economical alternative to traditional methods. The study's findings suggest that environmental DNA can be used to monitor fish populations, estimate abundance, and track distribution.
Scientists have successfully tracked fish migration by analyzing DNA in seawater, revealing the presence or absence of several key species. This new technique allows for cheap and non-invasive sampling, potentially improving our understanding of environmental impact on local fish populations.
A new study reviews decades of monarch research and finds that milkweed numbers have dropped by about 95% in cropland over the last 20 years, but natural areas show a smaller decline. The researchers suggest other factors such as habitat loss, disease, parasites, and climate change may also be contributing to the decline.
A new study finds that all but one coastal shark species are increasing in abundance, following decades of declining numbers. The gains are attributed to the enactment of fishing regulations in the early 1990s.
A new study has provided critical information on the Great Hammerhead shark's migration patterns, enabling marine management and conservation officials to develop effective protection strategies. The research found that the sharks return to specific areas after migrations, making them vulnerable to fisheries, and revealed complex movem...
Researchers used satellite tracking to study basking shark migrations, revealing they don't hibernate in UK waters but instead seek out warmer temperatures. The data provides crucial information for conservation efforts, as the species is classified as 'vulnerable' and faces threats from human activities.
Researchers mapped the long-distance movements of four goliath catfish species and found that adult dorado catfish take up to 1-2 years to reach their spawning grounds in or near the Andes. The study reveals the incredible life histories of these fish, which migrate thousands of kilometers in both directions to complete their life cycle.
Researchers found that a small, dried-out tributary became a vital shelter for over 10,000 stream fish in Hokkaido, Japan. The study suggests that even remnant tributaries are essential wintering habitats for fish to survive the harsh winter conditions.
A recent study from Umeå University found that young salmon's desire to migrate to the sea is partly limited by their fear of the unknown downstream. Researchers used anxiolytic medication to treat the salmon and found that treated fish migrated nearly twice as fast as untreated ones.
Researchers discovered that giant extinct salmon used their large spike-like teeth for fighting and display against each other during the breeding season. The findings indicate a significant change in tooth shape before migration, suggesting these fish underwent developmental changes prior to migrating upriver.
Researchers discover first direct evidence of hoary bats going into torpor, or hibernation, in California's redwood forests. The study suggests that the bats' roosting habitat may be the key to understanding why they hibernate despite being migratory species.
Neutrophils, the body's immune superheroes, switch from migrating to murdering invaders when exposed to reactive oxygen species. A receptor called TRPM2 senses ROS levels and triggers a shutdown of migration, allowing neutrophils to focus on killing bacteria and other pathogens.
Researchers tracked 75 Caspian seals using satellite trackers, uncovering surprising variation in their migration habits, hunting patterns, and food sources. The study provides vital information for conservation efforts, with potential applications in protecting seal habitats and planning human activities.
A University of British Columbia study finds that evolution accelerates the speed of plant migration in response to climate change. Plants that undergo evolution disperse seeds and migrate farther than their non-evolving counterparts, even in challenging conditions.
Researchers discovered two groups of brown bears in Turkey, one migrating between feeding and breeding sites, while the other stayed in a city dump all year round. This study highlights the impact of human-caused habitat fragmentation on bear behavior and conservation strategies.
A study analyzing oxygen isotopes in fossil teeth from red deer near the Adriatic Sea found seasonal migration patterns, which may have influenced Paleolithic hunter-gatherers. The researchers suggest that the migration patterns of red deer and mountain goats in the region may have impacted human mobility strategies.
A study reveals Amazonian fish species' life stories through otolith microchemistry, tracing migratory routes and environments. The research provides critical groundwork for conservation and management of threatened species.
A study using chemical analysis of ear-stones reveals details of Amazonian fish migrations, environments, and populations, providing insights into conservation efforts. The research identifies chemical markers tracing fish back to the Amazon estuary and black water vs. white water rivers.
Scientists have dated the opening of an ice-free corridor in the Rocky Mountains, which allowed for later human and animal migrations between North America's far north and rest. The research used bison fossils to track the movement of animals into the corridor, showing it was open by around 13,000 years ago.
Researchers found that Alaskan brown bears migrate between shallow spawning grounds to exploit varying salmon spawn times, allowing them to access the resource over a longer period. This 'surfing the salmon red wave' behavior showcases sophisticated foraging behaviors in wildlife.
Researchers documented significant reductions in wildlife-vehicle collisions after construction of overpasses and underpasses along a Wyoming highway. The study found that these structures can improve safety for motorists while enhancing habitat connectivity for migratory species.
Researchers tracked over 2,000 juvenile salmon on their 1,000-kilometer journey to the Pacific Ocean. The study found that survival rates increased significantly when salmon traveled in large groups, confirming the 'safety in numbers' strategy for avoiding predators.
A study in the Western Antarctic sector found that fin and humpback whales do not share the same habitat or feeding grounds. The two whale species are instead connected to different krill species, with Euphausia superba being the primary source of food for both.
Current whale migration models are too simplistic and don't account for the complexity of their ecological behavior. A deeper understanding of factors like reproductive patterns and local adaptations is needed to understand the diversity of migratory habits in baleen whales.
A Dartmouth College-led team used Wild-ID tracking technology to examine the link between wildebeest abundance and their ability to freely move within the Tarangire-Manyara Ecosystem. The study found diminished connectivity, reduced population size, and increased variability over time.
Scientists have identified a new potential spawning ground for Atlantic bluefin tuna in the Slope Sea off the northeastern US coast. This finding challenges the long-held assumption of a single Gulf of Mexico spawning area, suggesting that western Atlantic bluefin may be less vulnerable to fishing and stressors.
Scientists at Rutgers University-Newark discovered a small dragonfly species that migrates across vast distances, breeding with each other and creating a global gene pool. The dragonfly, Pantala flavescens, is estimated to have traveled over 4,400 miles, surpassing previously thought records of monarch butterflies.
A University of Exeter mathematician is studying the migration patterns of wildebeest, caribou, and salmon using state-of-the-art robotics and computer vision software. The research aims to understand how social influence impacts the stability and robustness of these migrations.
The African cheetah's migration from North America was costly, resulting in a reduced gene pool and increased inbreeding rates. The species' genetic variation has been severely impacted, with only 90-99% of its original diversity remaining.
A study published in PLOS ONE found that seasonal migrations can remove infected butterflies from wild populations, lowering parasite prevalence. The research tracked the natal origins of parasitized and uninfected monarchs to Mexico, revealing that uninfected butterflies originated from more northerly latitudes.
The study suggests that primitive North American mammoths emerged around 2-1.5 million years ago (MYA), originating from Asia via the Bering Strait. This new understanding challenges previous assumptions about the evolutionary timeline of North American Columbian mammoths.
Dolly Varden trout retire permanently from ocean migration at around 12 inches in length, relying on expanded digestive organs and unique relationship with sockeye salmon. Climate change could impact their life history patterns, potentially forcing them to seek new feeding patterns.
Researchers have finally tracked adult American eels in the Sargasso Sea, solving a 100-year-old mystery. The study reveals that eels use magnetic field detection to navigate their 2,400km journey from Nova Scotia to the reproduction site.
A study on migrating pike in the Baltic Sea found that accurate timing is crucial for survival and that fine-tuning behavior improves life expectancy. The research showed that individuals who adjust their migration timing based on experience have higher life expectancies than those who do not.,
A new study finds that as climate warms, many plants face uphill struggle for survival due to competition from unknown species. Alpine plants perform poorly if new competitors move in, but migrate and adapt well when moving into new communities.
A new study by UC Santa Barbara researchers predicts that climate change will cause significant reshuffling of marine biodiversity, with warming oceans leading to the relocation of nearly 13,000 species. This redistribution is expected to increase biodiversity in many areas but also lead to extinctions and homogenization of communities.
Researchers studied bats and rodents to identify characteristics of cross-species virus transmission. They found that viruses pass more easily between bat species than rodent species, with unique bat traits like gregariousness facilitating transmission.
Researchers found that freshwater acidification impacts pink salmon's ability to survive, return to spawning grounds, and detect predators. The study highlights the need for further research on freshwater species' responses to rising carbon dioxide levels.
A study published in PLOS ONE found that the Hawaiian hoary bat migrated to Hawaii from the Pacific coast of North America in two separate waves over 9,000 years apart. This genetic history suggests that the current legal protection may be inadequate or misdirected, highlighting the need for updated conservation efforts.
Researchers at University of Southampton develop translation dictionary for otoliths, allowing them to decode chemical signals about fish migrations. The study also reveals that sex can interfere with these signals, providing new insights into the biology and private lives of fish.
A new study reveals that species migrations between North and South America began around 20 million years ago, contradicting a long-held assumption that the Isthmus of Panama formed 3 million years ago. This finding has significant implications for understanding how biodiversity in the Americas developed.
A study by the University of Adelaide reveals that black bream in the Coorong estuary employ a 'bet-hedging' strategy to survive, migrating between locations based on water and food availability. This adaptation helps the species resist climate change and human impacts.