- Author: Jeannette E. Warnert

The city of Los Angeles is preparing to remove parts of the LA River's concrete lining, but that may not be enough to bring back native fish, reported Zoie Matthew in Los Angeles Magazine.
"It's hard to do piece-by-piece restoration projects for things adapted to river and stream systems. And it's impossible for steelhead," said Sabrina Drill, UC Cooperative Extension natural resources advisor in Los Angeles and Ventura counties.
Steelhead need a continuous, rapidly flowing channel to complete their life cycle. Other...
- Author: Jeannette E. Warnert

Biologists believe a high volume of water flowing through the Los Angeles River this winter due to El Niño rain will favor native fish, reported Louis Sahagun in the Los Angeles Times. Native species - who evolved in river systems prone to sudden torrents of water, mud, bolders and debris in winter and pools and damp patches in summer - main gain an edge when the river rages.
Currently, the fish population in the river is almost entirely non-native. Released as bait by anglers, dumped by the city to eat unwelcome species, and aquarium fish set free by their owners now populate the...
- Author: Jeannette E. Warnert

The Friends of the Los Angeles River organization is expanding its citizen science monitoring of fish in the Los Angeles River to additional locations, reported Carren Jao in KCET Columns.
Since 2008, the volunteers have been catching fish in Elysian Valley of the L.A. River and delivering them for analysis to three biologists, including Sabrina Drill, UC Agriculture and Natural Resources Cooperative Extension advisor in Los Angeles County. The biologists found that the fish caught here were healthier and...
- Author: Jeannette E. Warnert

The public television affiliate in Los Angeles County, KCET, has posted a series of videos in its Departures series featuring UC Cooperative Extension natural resources advisor Sabrina Drill.
Departures is part of the KCET's Youth Voices digital literacy program, which engages high school students through workshops to become multimedia producers.
In this latest series of five videos, Drill and Camm Swift, a fishery biologist with the Natural History Museum, are filmed on the bank of the Los Angeles River chatting about the significant impact urban...