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Slippery Salamanders

The threatened California tiger salamander can be difficult to find, and researchers have turned to using sequencing and geographical mapping to locate their habitats, reports Scientific American's Katherine Harmon. Brad Shaffer from the University of California, Davis, and his colleagues collected salamander DNA from the temporary pools the salamanders use as breeding grounds, and found that about 10 to 20 percent of larvae had parents from a different pool. And so, Shaffer's team used geographic information system data, combined with the genetic information, to determine where the salamanders came from. "Their findings surprised Shaffer — grasslands didn't end up being the most popular place for the salamanders," Harmon writes. "Instead, the chaparral proved to be the best habitat for the species, being about twice as appealing as the grassland."

The Scan

Self-Reported Hearing Loss in Older Adults Begins Very Early in Life, Study Says

A JAMA Otolaryngology — Head & Neck Surgery study says polygenic risk scores associated with hearing loss in older adults is also associated with hearing decline in younger groups.

Genome-Wide Analysis Sheds Light on Genetics of ADHD

A genome-wide association study meta-analysis of attention-deficit hyperactivity disorder appearing in Nature Genetics links 76 genes to risk of having the disorder.

MicroRNA Cotargeting Linked to Lupus

A mouse-based study appearing in BMC Biology implicates two microRNAs with overlapping target sites in lupus.

Enzyme Involved in Lipid Metabolism Linked to Mutational Signatures

In Nature Genetics, a Wellcome Sanger Institute-led team found that APOBEC1 may contribute to the development of the SBS2 and SBS13 mutational signatures in the small intestine.