Spotting Redds: The Art of Biology

With salmon spawning season in full swing, our fisheries technicians and biologists are hard at work both in the office and out in the field collecting and Read More…

Bird’s eye view

Back in December, we wrote about using time-lapse photography to record events that occur over an extended period (See Zipping through time). In an effort to record Read More…

All in or not?

Success for a Chinook salmon is defined as successfully spawning once, then dying – a reproduction strategy known as semelparity. Most do not meet this goal of Read More…

It’s a wrap!

As the Chinook spawning season in our local rivers draws to a close, we’ve wrapped up our final redd surveys of the year. Every year, we conduct Read More…

On point

For the past few weeks, fisheries technicians have been carefully surveying miles of the Stanislaus River for salmon nests (i.e., redds). Perched high on the bow of Read More…

Watchdog or uh… fish

We’ve mentioned male parental care in fish before, (Daddy Daycare) but we recently witnessed this smallmouth bass (Micropterus dolomieui) guarding its nest while diving in a Central Read More…

Winter trout spawning

We captured this "ripe" female rainbow trout (Oncorhynchus mykiss) while electrofishing in a California reservoir. You can tell if a female is ready to spawn by how Read More…

Gravel replenishment

Many rivers have had huge quantities of gravel extracted from active river channels, resulting in a net loss of gravel and drastically changing channel geomorphology. The construction Read More…