Category Archives: Illinois

Illinois Names Seven State Scientists

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Seven scientists have been appointed to be spokespeople for their scientific disciplines through the University of Illinois Prairie Research Institute. The state had previously had a state entomologist, a state geologist and a state climatologist, but now those positions and four others have been officially recognized by the state legislature.

The State Biologist is Brian D. Anderson, director of Illinois Natural History Survey, the Daily Illini says.

The most detailed report of the new, official positions comes from the Daily Illini, the independent student newspaper of the University of Illinois.
You can read the shorter, less informative Associated Press story on the WICS television news site, here.

River Otters Exposed to Banned Chemicals

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otter teamRiver otters have made a remarkable comeback in the last few decades, particularly in Illinois, as we reported recently. However, those Illinois river otters have significant amounts of long-banned chemicals — such as PCBs and DDE (a chemical that results from the breakdown of DDT) — in their tissues, a recent study from the Illinois Natural History Survey has found.

A press release from the University of Illinois reveals that for one chemical, the concentrations were higher in the otters now than they were when the chemical was in legal use:

The researchers were surprised to find that average concentrations of one of the compounds they analyzed, dieldrin — an insecticide (and byproduct of the pesticide aldrin) that was used across the Midwest before it was banned in 1987 — exceeded those measured in eight river otters collected in Illinois from 1984 to 1989. Liver concentrations of PCBs and DDE (the latter a breakdown product of the banned pesticide DDT) were similar to those in the earlier study, the release says.

Scientifically, this is a mystery still to be solved. Were the chemicals used long after they were banned? Did it take decades for the chemicals to climb the food chain from algae to top predator? Are female otters passing the contaminants to their offspring in their milk?

But for wildlife managers, it has a lesson useful right now. When trying to find causes for unknown population declines, don’t dismiss the effects of toxic chemicals just because those toxic chemicals were banned from use decades ago.

The University of Illinois press release.
The paper, in the journal Ecotoxicology and Environmental Safety. It is a free access journal.

Photo: Samantha Carpenter (left), a wildlife technical assistant with the Illinois Natural History Survey (INHS); Kuldeep Singh, pathobiology professor at the U. of I. Veterinary Diagnostic Laboratory; Nohra Mateus-Pinilla, an INHS wildlife veterinary epidemiologist; and U. of I. animal sciences professor Jan Novakofski found that Illinois river otters are contaminated with banned pesticides and PCBs.  Credit: L. Brian Stauffer

River Otter Comeback in Illinois

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River_OttersIllinois Department of Natural Resources furbearer biologist Bob Bluet told the Springfield (IL) State Journal Register that the state’s first river otter trapping season culled slightly more otters than anticipated because fur prices were up. “More people were trapping and there was more opportunity to catch otters,” he said.

River otters haven’t been trapped in Illinois since 1929. It was believed their numbers were down to just 100 before 1990. A reintroduction program, which ran from 1994 to 1997 was so successful, that the otters became s nuisance in some places, the article says. The recent trapping season harvested 13 percent of the state’s population, not quite enough to reduce the number of otters in the long term, Bluet told the newspaper.

For more details on the river otter’s restoration in Illinois, the nuisance factor and the recent trapping season, read the article in the Springfield State Journal Register.

An abridged version of the article ran in the West Kentucky Star.

Photo: River otters by Jim Leopold, courtesy US Fish and Wildlife Service

 

 

White Nose Syndrome in Illinois

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Illinois WNS mapWhite nose syndrome (WNS) in bats was detected in four Illinois counties in February, the Chicago Sun-Times reports. The US Fish and Wildlife Service’s WNS map shows that the new sites in southern Illinois are near other sites in other states, while the site in the northern part of the state stands alone (although it is somewhat near last year’s unconfirmed Iowa site).

The article notes that Illinois is the 20th state to be struck by WNS.

The Illinois Department of Natural Resources press release says that the bats found with WNS were little brown bats and northern long-eared bats.

Read the Chicago Sun-Times article here.
Read the Illinois DNR press release here.
See the updated WNS map from the US Fish and Wildlife Service here.

In addition: the suspected case of WNS on Prince Edward Island in Canada, which we reported on last month, has been confirmed to be WNS.

Read the article on the CBC website, here.

(‘Tis the season for WNS reports. It generally runs from March through June, so stay tuned.)

Map: Cal Butchkoski, PA Game Commission, used courtesy of US Fish and Wildlife Service

Midwest Otter Recovery

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otter_pair_maxwellRiver otters now occupy more than 80 percent of Indiana counties, says Scott Johnson, nongame biologist with the Indiana Department of Natural Resources in a department press release.

That is remarkable, because in 1942 river otters had been extirpated from the state. A restoration program began in 1995, 303 otters were transported from Louisiana and released at 12 sites in northern and southern Indiana.The otters thrived and in 2005 they were removed from the state’s endangered species list.

More recently, otters have moved into central Indiana, finding habitat in an area that was long thought not to be ideal, says Johnson.

In what is perhaps the modern sign of wildlife restoration success, the otters are now considered a nuisance to some Indiana pond owners. The IDNR received 34 river otter complaints last year and issued 10 control permits in 2012.

Read the IDNR press release, here.

In Illinois, river otter restoration may be considered even more successful. Last week, National Public Radio reported that Illinois had reinstated an otter trapping season for the first time in 90 years. The story’s headline says that the state has been overrun by otters.

Read or listen to the NPR story, here.

Photo: River otters, courtesy Indiana Department of Natural Resources

Midwest Otter Recovery

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otter_pair_maxwellRiver otters now occupy more than 80 percent of Indiana counties, says Scott Johnson, nongame biologist with the Indiana Department of Natural Resources in a department press release.

That is remarkable, because in 1942 river otters had been extirpated from the state. A restoration program began in 1995, 303 otters were transported from Louisiana and released at 12 sites in northern and southern Indiana.The otters thrived and in 2005 they were removed from the state’s endangered species list.

More recently, otters have moved into central Indiana, finding habitat in an area that was long thought not to be ideal, says Johnson.

In what is perhaps the modern sign of wildlife restoration success, the otters are now considered a nuisance to some Indiana pond owners. The IDNR received 34 river otter complaints last year and issued 10 control permits in 2012.

Read the IDNR press release, here.

In Illinois, river otter restoration may be considered even more successful. Last week, National Public Radio reported that Illinois had reinstated an otter trapping season for the first time in 90 years. The story’s headline says that the state has been overrun by otters.

Read or listen to the NPR story, here.

Photo: River otters, courtesy Indiana Department of Natural Resources

Turtles, Cougars, and Frogs in the Southwest

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The current issue of Southwestern Naturalist has several articles that may be of interest to biologists outside of the region.

Yellow mud turtles decline in the Midwest. The largest populations of yellow mud turtles in Iowa, Illinois, and Missouri have experienced severe declines. Withdrawal of water from aquifers is the main cause, but the growth of woody plants also plays a role. Read the article, here. (Requires fee or subscription for full article.)
More info on yellow mud turtles from Texas Parks and Wildlife, here.

Cougar habitat in Texas and northern Mexico. Researchers from Sul Ross State University tested a model of current and potential cougar (Puma concolor) in Texas and northern Mexico and found that it worked. Read the article here. (Same for fees or subscription.)

Fungus strikes desert frogs. Chytrid fungus was found in desert oasis frog populations in Baja California Sur. The oases with higher infection rates also had bullfrogs and non-native crayfish. Read the article here.

Also interesting: Western red bats (Lasiurus blossevillii) and Arizona myotis (Myotis occultus) were found on the lower Arizona River after the area was restored. The Arizona myotis had been extirpated from the area, and the western red bat had not be found there previously. Read the article here.

Dry in the Midwest

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Things have been dry in the Midwest this year. So far the biggest impact seems to be fish kills in bodies of water that are drying out. However, according to an Associated Press article that ran in the Indiana Post-Tribune, the impact may not be felt for years:

Rusty Gonser, professor of ecology and biology at Indiana State University, said the drought’s impact could extend well into the future where fish and wildlife are concerned.

 

“There are short-term and long-term effects with a drought like this,” he said.

 

“You might not see the effect on the population for two to five years,” he said, noting that shifts in reproductive cycles occur at all levels of the ecosystem. “And in three years, it might be raining a lot and people won’t realize a drought caused the issues seen then.” (Read the whole article, here.)

 

In fact, just last year the Midwest saw high rainfalls and flooding, so it may be difficult to sort out the impacts on area wildlife in the years to come.

Another take on the drought comes from a columnist for the Aurora (IL) Beacon-News. Her take-away? It’s the survival of the fittest. (Read it, here.)

The drought also means a quieter Fourth of July. Fireworks have been banned in some locations, for fear of starting wildfires. (Missouri Department of Conservation press release, here.)

Meanwhile, the US Drought Monitor shows that, while the Midwest drought is still relatively new (and parts of the Midwest are merely suffering from an “abnormally dry” spell) long-term drought continues in the South and West.

Photo by Steve Hillebrand, courtesy US Fish and Wildlife Service

Maybe Bats Just Hit (or Get Hit by) Wind Turbines

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Four years ago a science journal article was published saying that most of the bats found dead at an Alberta wind farm had no signs of external injuries, but their lungs were damaged. The verdict: barotrauma, damage caused by a sharp change in pressure. In humans the most common example is when you rupture an ear drum while on an airplane.

It was unexpected, it was weird, and it got plenty of coverage in the general media. (National Geographic News; Discover Magazine blog)

Now some Illinois scientists have published a paper in the journal Veterinary Pathology that says that damaged lungs can be an artifact of freezing specimens before examination, and that the bats they examined that were found dead at an Illinois wind farm showed every sign of plain old trauma. In fact, the paper says, the bats at the wind farm had more external injuries than the bats found dead in downtown Chicago that were assumed to have been killed by flying into buildings.

Read the article in Veterinary Pathology, here. (Fee or subscription required.)

Photo: Gray bat, courtesy US Fish and Wildlife Service

Scale-destroying Fungus Found in Wild Snakes

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In 2008 three eastern massasauga rattlesnakes were discovered in an Illinois park with deformed heads. Another was found in the same park in 2010. Tests revealed that the snakes were suffering from a fungal infection — a fungus in the genus Chrysosporium to be exact.

The news is breaking now because the comments a veterinarian involved was covered in an Associated Press article. You can read the article in the Boston Globe, here. The article says that the fungus has been found in rattlesnakes in New Hampshire and Massachusetts, too.

The rattlesnake species is a candidate for federal Endangered Species listing, the article says.

As it turns out, the researchers involved published a letter in the journal Emerging Infectious Diseases in December 2011. The researchers describe the fungus as being similar to another fungus found in bearded dragons, a non-native pet lizard. That fungus is in another genus, though. A very similar fungus was also been reported in a captive black rat snake.

The fungus is described as being able to break down keratin, which is what snake scales are made out of.

Read an html version of the Emerging Infectious Diseases article, here.
Find the PDF version here.

Photo: Pretty poison, a healthy eastern massasauga rattlesnake, courtesy of the US Fish and Wildlife Service