Wild Animals News all about their native habitats. Check current research articles on from animal world, wildlife news and updates, wildlife news from around the world.
Endangered vaquita remain genetically healthy even in low numbers
on October 23, 2020 at 4:31 pm
The critically endangered vaquita has survived in low numbers in its native Gulf of California for hundreds of thousands of years, a new genetic analysis has found. The study found little sign of inbreeding or other risks often associated with small populations.
Fish exposed to even small amounts of estrogen produce fewer males
on October 23, 2020 at 4:31 pm
A biologist conducted experiments with North American freshwater fish called least killifish. She found that fish exposed to estrogen in concentrations of 5 nanograms per liter in controlled lab conditions had fewer males and produced fewer offspring. Scientists have found estrogen at as much as 16 times that concentration in streams adjacent to sewage treatment plants.
DNA in fringe-lipped bat feces reveals unexpected eating habits
on October 22, 2020 at 9:02 pm
By examining the guano of the fringe-lipped bat (Trachops cirrhosus), biologists encountered surprising results about its eating habits and foraging abilities.
Are bushmeat hunters aware of zoonotic disease? Yes, but that's not the issue
on October 22, 2020 at 4:31 pm
A recent article outlines how researchers with the measured the attitudes, practices and zoonoses awareness among community members associated with the bushmeat trade in northern Uganda.
These two bird-sized dinosaurs evolved the ability to glide, but weren't great at it
on October 22, 2020 at 3:26 pm
Despite having bat-like wings, two small dinosaurs, Yi and Ambopteryx, struggled to fly, only managing to glide clumsily between the trees where they lived, researchers report. Unable to compete with other tree-dwelling dinosaurs and early birds, they went extinct after just a few million years. The findings support that dinosaurs evolved flight in several different ways before modern birds evolved.
Genome sequencing shows climate barrier to spread of Africanized bees
on October 21, 2020 at 8:39 pm
Since the 1950s, 'Africanized' honeybees have spread north and south across the Americas until apparently coming to a halt in California and northern Argentina. Now genome sequencing of hundreds of bees from the northern and southern limits shows a gradual decline in African ancestry across hundreds of miles, rather than an abrupt shift.
Delivering proteins to testes could someday treat male infertility
on October 21, 2020 at 5:01 pm
According to the Mayo Clinic, about 15% of couples are infertile, and male infertility plays a role in over one-third of these cases. Often, problems with sperm development are to blame. Now, researchers have found a way to deliver a protein important for sperm cell production directly to mouse testicles, where it restored normal sperm development and allowed previously infertile mice to father pups.
Management of exploited transboundary fish stocks requires international cooperation
on October 21, 2020 at 3:23 pm
Marine fish species are migratory in nature and not respectful of human-made territorial boundaries, which represents a challenge for fisheries management as policies tend to focus at the national level. With an average catch of 48 million tonnes per year, and USD $77 billion in annual fishing revenue, these species support critical fisheries, and require international cooperation to manage.
Legacy pollutants found in migratory terns in Great Lakes region
on October 21, 2020 at 3:15 pm
Chemicals that haven't been manufactured in the U.S. for years or even decades are still turning up in the bodies of migratory terns in the Great Lakes region, a new study finds. The research focused on three types of compounds: PBDEs, PCBs, and the breakdown products, called metabolites, of DDT.
Declines in shellfish species on rocky seashores match climate-driven changes
on October 20, 2020 at 12:17 pm
Mussels, barnacles, and snails are declining in the Gulf of Maine, according to a new article by biologists. Their 20-year dataset reveals that the populations' steady dwindling matches up with the effects of climate change on the region.
Management of a popular game fish, the smallmouth bass
on October 19, 2020 at 7:59 pm
For recreational fishing enthusiasts, the thrill of snagging their next catch comes with discovering what's hooked on the end of the line. In many freshwater streams and rivers -- across the central and eastern parts of the U.S. -- anglers are often catching a popular freshwater game fish: the smallmouth bass. Now, scientists have discovered a new level of biodiversity within that species.
Light pollution alters predator-prey interactions between cougars and mule deer in western US
on October 19, 2020 at 3:21 pm
A new study provides strong evidence that exposure to light pollution alters predator-prey dynamics between mule deer and cougars across the intermountain West, a rapidly growing region where nighttime skyglow is an increasing environmental disturbance.
Neurons in a visual brain area of zebrafish are arranged as a map for catching prey
on October 19, 2020 at 2:35 pm
Spotting, pursuing and catching prey - for many animals this is an essential task for survival. Scientists now show in zebrafish that the localization of neurons in the midbrain is adapted to a successful hunting sequence.
Trees bring benefits to society, regardless of their origin
on October 19, 2020 at 2:34 pm
Trees planted in urban spaces provide a multitude of ecosystem and social services. At the same time, trees can be a source of inconveniences. Scientists have analyzed trees found in the Geneva region, and systematically assessed the services and inconveniences they generate. They show that most tree species are non-native, and that trees provide roughly the same ecosystem services to Geneva's urban spaces regardless of their origin.
Early-arriving endangered Chinook salmon take the brunt of sea lion predation
on October 19, 2020 at 12:28 pm
A new study found that sea lions have the largest negative effect on early-arriving endangered Chinook salmon in the lower Columbia River.
World's greatest mass extinction triggered switch to warm-bloodedness
on October 16, 2020 at 3:49 pm
Mammals and birds today are warm-blooded, and this is often taken as the reason for their great success.
Monkey study suggests that they, like humans, may have 'self-domesticated'
on October 15, 2020 at 5:42 pm
Scientists determined that changing an infant monkey's verbal development also changed a physical marker of domesticity: a patch of white fur on its forehead. This is the first study linking the degree of a social trait with the size of a physical sign of domestication, in any species.
Bats save energy by reducing energetically costly immune functions during annual migration
on October 15, 2020 at 3:17 pm
A team of scientists led by the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) investigated whether and how the immune response changes between pre-migration and migration seasons in the Nathusius pipistrelle bat. They confirmed that migratory bats favour the energetically ''cheaper'' non-cellular (humoral) immunity during an immune challenge and selectively suppress cellular immune responses. Thereby, bats save energy much needed for their annual migration.
Australian carp virus plan 'dead in the water'
on October 15, 2020 at 4:34 am
Plans to release a virus to reduce numbers of invasive Common Carp in Australia are unlikely to work and should be dropped, researchers say.
Beak bone reveals pterosaur like no other
on October 15, 2020 at 12:10 am
A new species of small pterosaur - similar in size to a turkey - has been discovered, which is unlike any other pterosaur seen before due to its long slender toothless beak.