Background Articles

Reports that the sea star population was rebounding appear to have been overly optimistic, says the Coastal Ocean Research Institute.

Leptospirosis infections, caused by Leptospira bacteria, occur in people and animals around the world, but different strains of the bacteria may vary in their ability to cause disease and to jump between species. Now, researchers have for the first time described the characteristics of the Leptospira variants that infect cattle in Uruguay.

Zarantonelli et al. 2018. Isolation of pathogenic Leptospira strains from naturally infected cattle in Uruguay reveals high serovar diversity, and uncovers a relevant risk for human leptospirosis. PLOS Neglected Tropical Diseases 12 (9): e0006694 DOI: 10.1371/journal.pntd.0006694

An increase in carbon emissions are showing up not only in the air, but also in water. Now researchers and shellfish farmers are teaming up to see how marine plants can help stave off the effects of ocean acidification. Special correspondent Jes Burns of Oregon Public Broadcasting reports.

A recent study shows that polar bears' mercury levels are declining as melting ice drives them onshore. But is it all good news? Read on.

Study finds genetic evidence of climate-change adaptation.

A parasitic isopod that scientists identified five years ago has all but decimated mud shrimp populations in coastal estuaries ranging from British Columbia to northern California - with the exception of a handful of locations in Oregon from Waldport to Tillamook.

All persons practicing veterinary medicine in North Carolina shall report these listed diseases and conditions to the State Veterinarian's office by telephone within two hours after the disease is reasonably suspected to exist.

A mysterious illness that has been killing songbirds in mid-Atlantic states may have moved into North Carolina, according the N.C. Wildlife Resources Commission. The disease — which cause the eyes of birds to crust over — has been expanding its reach since being reported four months ago in Kentucky, Virginia, West Virginia, Maryland and Washington D.C.

The article reports on a successful emergency response drill in Chukotka, Russia, where a simulated bird flu outbreak was contained.

Worms infecting fish grow four times faster at higher temperatures and manipulate the behavior of fish.

Fair organizers say they’re concerned about the spread of bird flu.

Avian flu and avian pox are causing serious ailments and mortality in bird populations, with the viruses being transmitted through direct contact, ingestion, and inhalation, while pesticides and toxic run-off from mining activities also contribute to avian disability and mortality.

Alaska Wildlife News is an online magazine published by the Alaska Department of Fish and Game

When it comes to avian influenza, more commonly known as bird flu, all birds are not created equal.

Arctic fox rabies is enzootic in populations of arctic and red fox populations along Alaska’s northern and western coasts. This means rabies is always present in these populations at some low level but periodically there can be outbreaks called epizootics (an outbreak in animal disease rather than an epidemic as is it is called when occurring in a human population). However, the winter of 2020-2021 ushered in a widespread outbreak with persistent and large focus in and around Nome.

The specific "medical" smell of whale meat may be caused by liver disease or the animals' diet. Chukchi Sea hunters began noticing the pungent, unpleasant smell in some whales about 20 years ago. Recently, the number of stinky whales has increased. Scientists with Beringia National Park analyzed the isotopic composition in 46 samples of gray whales. “Stinky” whales had significantly lower levels of heavy nitrogen. Scientists still must understand whether this is a result of liver disease or a diet based on algae. Scientists hope to study more high-quality samples of “stinky” whales.

Arctic fox rabies is enzootic in populations of arctic and red fox populations along Alaska’s northern and western coasts. This means rabies is always present in these populations at some low level but periodically there can be outbreaks called epizootics (an outbreak in animal disease rather than an epidemic as is it is called when occurring in a human population). However, the winter of 2020-2021 ushered in a widespread outbreak with persistent and large focus in and around Nome.

Marine hunters of eastern Chukotka often encounter "stinky" whales whose meat is unsuitable for food. The situation has become a problem for local residents. Researchers from Moscow State University and the Beringia National Park believe they have found the causes of an unpleasant odor in animals.

It’s not always lethal, but the fungus has decimated frog populations around the world and is thought to be responsible for up to 90 extinctions. Researchers aren’t sure how it got to Alaska, but it has been observed here since the year 2000.

It causes legs to fall off and, ultimately, results in disintegration of the animals’ bodies. Climate change may be behind that disease, as the arrival of Pacific marine heat waves coincided with the disease outbreak, according to federal biologists.The sea star, with a range from Baja California to the Aleutians, would be the first sea star with an Endangered Species Act listing.