Featured Scientist

Fishing for night smelt from the beach in Pacifica.


Fishing for night smelt from the beach in Pacifica.


Ken Oda holds a soupfin shark caught while capturing California halibut for a hooking mortality study.


Ken Oda piloting the research vessel Triakis on San Francisco Bay while doing Pacific herring surveys.  

Ken Oda is an environmental scientist with CDFW’s Marine Region and a member of the Northern and Central California Finfish Research and Management Project. Based out of the Monterey office, Ken is also the lead person for sandy beach surfperch research and management.

Where did you grow up?

I was born and raised in Monterey. My great-grandfather operated a sardine cannery on Cannery Row, and my grandfather ran a wholesale fish business on Wharf 1 in Monterey, specializing in local abalone.

What led you to a career in marine biology?

It’s genetics. My mom’s family was in the commercial fishing industry. My dad was an avid fisherman and diver. I became fishing-obsessed at a young age and wanted to learn everything I could find about fish. Given my strong interest in fish and all things fishing, my parents “suggested” that I choose a career path consistent with my fish fascination.

After searching for colleges offering fisheries degrees, I decided that Humboldt State University could offer me the best education. I graduated from Humboldt State with a Bachelor of Science degree in fisheries, with a mariculture emphasis.

In 1982, my mom went to the annual open house at the CDFW’s Granite Canyon Mariculture Laboratory in Big Sur. She had a conversation with the director, Earl Ebert, who invited me to do my senior thesis at the lab as a volunteer student intern. My job entailed taking care of juvenile Red Abalone. Later, my first paying position was as a scientific aid sampling sport and commercial rockfish landings from Monterey to Santa Cruz. I worked as a fisheries technician on groundfish for the Pacific States Marine Fisheries Commission. By 1988, I began my first permanent position as an entry level marine biologist. Later I promoted to marine biologist conducting population assessments on San Francisco Bay herring. In 2005, I transferred back to Monterey, which eventually landed me on my current project.

What inspires you?

The learning opportunities. I remember reading vintage issues of CDFW journals and informational publications, e.g., ocean fishing maps and fish identification books, and thought that I’d want to do that kind of work someday. I had the privilege to meet and work with ichthyologists Dan Miller, Dan Gotshall and Bob Lea, who authored the publications that I had read.

I’m also inspired by the fact that I’m working on surfperch fisheries that my family have been active participants in since the 1910s.

What is a typical day like for you at work?

The best thing about my job is having daily opportunities to learn something new while in the field, interacting with others or through data analysis.

I’m doing more writing than fieldwork these days, but on those days when I can get out of the office, I head to a local beach to collect surfperch. To do so, I gather up my fly and/or conventional rods and reels, a tackle bag/soft cooler, electronic thermometer, and a smart phone for taking photos and storing data in the field. If successful, I’ll bring the fish back to the lab and collect life history information from them: lengths, weights, sex, maturity, and ear bones (otoliths) used for age determination and input the data into a spreadsheet.

When I’m not in the field, I check and respond to emails and phone calls, and search for publications to support the reports that I’m writing.

What interesting projects are you working on currently?

Writing “Enhanced Status Reports” (ESRs) as part of the implementation of the 2018 Marine Life Management Act Master Plan for Fisheries. The ESRs describe the individual species or species groups, habitat, research and management, and the state-managed fisheries that they support.

What accomplishment are you most proud of?

I was the project lead person that coordinated the purchasing process for building a custom research boat for the Pacific Herring Project. This was the first for the Marine Region in many years. The process from the funding proposal to delivery of the boat took about three years. It took a team of CDFW staff, consultations with commercial fishermen, boat builders and naval architects and engineers to pull it together and deliver a boat that is still in service after 20 years.

Over the course of your career, was there a discovery or an incident that surprised you?

During the 1997 El Niño storms when levees in the Delta broke and caused widespread flooding, it was not unusual to see random items drifting around in San Francisco Bay while doing surveys — a travel trailer, dead cattle, snakes, a refrigerator.

What are the best – and most challenging – things about being a fish and wildlife scientist?

I appreciate feeling “dialed in” with the fish species through field work and seeing fish in the flesh. Fish and fishermen are more than numbers in a table or points in a graph and observations sometimes can’t be captured on paper or camera.

The most challenging aspect is presenting information that you know won’t be popular to a group of people and trying to remember that you’ve done your best despite their reactions.

If you had free reign and unlimited funding, what scientific project would you most like to do?

A statewide quantitative survey of surf species using fishing rod castable armored cameras and a fleet of four-wheeled ATVs.

Away from work, where are we likely to find you?

Fishing somewhere — on a tropical flat, a coastal river for steelhead, or the Delta for striped bass. I’m happy fishing anywhere for just about anything.

Tell us something about yourself that many people would be surprised to learn.

I played competitive volleyball, which resulted in two surgeries and broken fingers.

Do you have any advice for people considering careers in science or natural resources?

Realize that it’s a very competitive field these days for jobs, prepare accordingly, take opportunities to meet those working in the field that have taken similar career paths and volunteer to determine if a job/career is what you really want. Keep an open mind — we never know it all.

CDFW Photos courtesy of Ken Oda. Top Photo: Ken Oda at work collecting surfperch in his Sandy Beach Surfperch Research and Management project.

Erin loads evidence samples onto the Applied Biosystems 3500xl Genetic Analyzer in order to visualize their DNA profiles.


Erin and her husband, Jeff Rodzen, a fisheries geneticist for CDFW, have two children, 4-year-old Ryan and 9-month-old Reagan.


Erin and her husband, Jeff Rodzen, a fisheries geneticist for CDFW, have two children, 4-year-old Ryan and 9-month-old Reagan.


Erin competes in dressage aboard her horse Grande.

Erin Meredith is a senior wildlife forensic specialist. With 18 years at CDFW’s Wildlife Forensics Laboratory (WFL), Erin is the senior member of the four-person scientific team that conducts DNA analysis, species identification and other evidence processing to support CDFW’s criminal cases and protect California’s fish and wildlife from poaching, exploitation and abuse.

CDFW’s lab is just one of approximately 10 wildlife forensic laboratories in the nation. It works on approximately 100 criminal cases every year and plays a key public safety role by helping to identify the correct species and offending animals in attacks that may involve mountain lions, black bears, coyotes, and even great white sharks.

Born in San Jose and raised in Placer County, Erin holds bachelor’s and master’s degrees in genetics from UC Davis.

What inspired you to become a scientist?

From a young age, I always enjoyed math and science. I liked the definitive answers and learning about how things worked. In high school, I had a wonderful biology teacher, and I specifically remember him teaching a unit on DNA. At that time, DNA and genetics were just starting to become more mainstream, and I was just so intrigued with how the DNA bases were essentially translated into the “language” of different functions within the body. I think that was the turning point when I knew specifically what I wanted to study in college.

How did you get to CDFW?

While I was at UC Davis, I started working as an intern and undergraduate researcher with a group that did fish genetics. It turned out that they had a long history of contracts for genetic work with CDFW’s Fisheries Branch, so I had my first exposure to the department there. I was not necessarily interested in sticking with fish genetics as I was becoming more interested in the law enforcement and forensic aspects of DNA. I thought I’d end up working in human forensics at the time.

It was my uncle who worked as one of the hatchery coordinators in the department who connected me with wildlife forensics -- kind of by accident. He told me, “Hey, there are these two guys in Region 2 who walk around in lab coats all the time. I’m not exactly sure what they do, but they have something to do with forensics. You should really look into it.” And so I did.

I ended up meeting Jim Banks, who was a senior wildlife forensic specialist and had been with the department for nearly 20 years. He invited me to come in and learn about the techniques they were using and what some of their investigations looked like. Little did I know he was testing me as a replacement for his scientific aid who was about to go off to graduate school. When she left, I got a scientific aid position at the lab. I guess you could say the rest is history.

Unfortunately, the lab has always been very small. For the majority of its existence, it was run by only two full-time staff and scientific aids, so I was actually a scientific aide from 2000 to 2007. It was a long ride. I obtained a full-time position in 2007 when Jim Banks retired.

Let’s say you’re in a social setting without any CDFW colleagues around. How do you explain what you do for a living?

I usually ask them, “Do you ever watch ‘CSI?’ ” Most of the time they say, “Of course, that’s such a cool show.” And then I say, “Just imagine instead of humans, it’s crimes involving wildlife.” My joke is always that human forensics is boring – you only work on one species. With wildlife, the possibilities are essentially endless.

How many species do you typically work on?

We currently have extensive DNA databases and can do individual matching like they do in human forensics on California deer, elk, mountain lion, black bear, coyotes and wolves. We can also use DNA to identify virtually any animal to the species level. The lab has done cases involving everything from abalone to zebra.

Beyond processing criminal evidence, can you explain the lab’s public safety role?

The lab is called in to assist with DNA analyses on many public safety incidents – especially when there is the potential of physical contact between a person and an animal and the department needs to confirm the species or identity the offending animal. Typically, these incidents involve black bear, mountain lion or coyotes, though we’ve also analyzed attacks by other species – deer, river otter, and great white sharks to name a few. By analyzing the DNA left in the form of saliva around bite wounds or even so-called “touch” DNA from claw wounds, we can verify an attack actually happened, confirm the species involved, and, depending on the species, obtain the genetic profile and sex of the offending animal. This genetic information allows us to compare the DNA profiles of trapped suspect animals with the offending animal’s DNA collected directly from the human victim. When these genetic profiles are a match, we can confirm with statistical certainty that the trapped suspect is indeed the offender. If the profiles do not match, we can free the innocent – which has happened a good number of times.

What do you like best about your job?

I like that we can use DNA to tell the story of what actually happened or what is actually present in each case. Many times, the suspected poachers’ stories or even accounts from people involved in possible wildlife attacks just don’t add up. Sometimes even what our wildlife officers believe to be true from their investigation is different than what the DNA shows. DNA doesn’t lie so letting the science speak and tell the true story is a wonderful tool.

If you had free rein and unlimited funding, what scientific project would you most like to take on?

This is a very difficult question as there are so many projects to choose from. As a forensic lab, we try to watch what the human forensic labs are doing and mimic their methods to the best of our abilities. We are currently watching what is happening with Next Generation Sequencing (NGS) and how this technology will evolve in the forensic community. We are interested in the potential to utilize this to combat issues such as “zone poaching” – killing a deer out of a zone for which the hunter doesn’t have a tag -- or possibly issues regarding hybridization.

With the passage of AB 96 and the resulting new ivory laws in 2015, we are doing more work with wildlife that is trafficked internationally. The demands placed on the WFL have already expanded beyond what we envisioned, resulting in new collaborative efforts and non-DNA-based analyses. I don’t know exactly where any of these paths will lead, but I do know that the WFL will continue to do its best to answer any legal questions through the use of thorough and principled scientific methods.

Tell us something about yourself people would be surprised to learn.

Many people know that I am a lifelong equestrian. I still love to ride and compete, but my secret goal in life is to be on “American Ninja Warrior.” I do a lot of physical fitness type activities, but nowhere near the training needed for that show – yet!

CDFW Photos. Top Photo: Erin Meredith.

Mia holding a federally endangered blunt-nosed leopard lizard (Gambelia sila), helping environmental scientist counterparts from Region 4 with their annual population surveys in West Kern County.


Mia handling San Joaquin kit fox (Vulpes macrotis mutica) in Bakersfield.


In an effort to control a mange outbreak affecting the kit fox population in Bakersfield, Mia and other scientists were providing a helping hand to do some wellness checks for individual animals.

Mia Roberts is an environmental scientist for CDFW’s Office of Spill Prevention and Response (OSPR). She is part of the Fairfield-based field response team, tasked with responding to oil spills throughout the San Francisco Bay Area. She previously worked on the response team in Bakersfield.

Mia began her career with the department as a scientific aid working on the Delta Smelt and Coastal Pelagic Species programs. She then served a brief stint in the private sector, working as a scientist for an environmental consulting firm that specialized in electrical transmission projects. She returned to the department in her current role at OSPR about three years ago.

Mia earned a bachelor’s degree in integrative biology from the University of California, Berkeley, and has diverse professional experience in natural resources management and environmental compliance. She is also a fluent Spanish speaker after spending time studying abroad in Costa Rica.

Who or what inspired you to become a scientist?

My inspiration to pursue a career in natural resources protection came from my mother. She taught me to care for the environment around me, even if that meant picking up one piece of trash a day. She encouraged outdoor play, and many of our family outings were spent outdoors. In addition to my mother, Jane Goodall was (and still is) a powerful role model for me.

What got you interested in working with CDFW?

Not everyone is lucky enough to know what they want to “be” when they grow up, but I had a general idea of what I wanted to do since I was very young, which was to protect animals. My career goals evolved and matured over time as I accumulated professional and life experience, but my core interests have always stayed the same – speaking for the voiceless.

I have worked in private industry, the federal government and in non-profit organizations, but my favorite and most fulfilling work experiences have always been with CDFW. The work I have done, and continue to do, has always aligned with my childhood aspirations of protecting the natural world. I work alongside some amazing people at CDFW, and I have learned so much from them along the way. I hope to continue learning as much as possible with the department while simultaneously contributing to the protection of our state’s beautiful and unique natural resources for future generations.

What is a typical day like for you at work?

Being on the Northern Field Response Team means we are some of the first people on scene during an oil spill. My schedule could be full of oil spill drills, contingency planning and training activities, but it could all be dropped if the team has to respond to an oil spill. I love having a profession where I never know what my day is going to look like, because it keeps me on my toes and I never get bored.

I love working with a team to solve a problem, and being part of the response team provides endless opportunities to do that. Every spill we respond to is different and comes with its own challenges. Our main goal as the field response team is to safely clean up oil spills while causing the least environmental harm. I very much enjoy working with my fellow responders to accomplish that goal.

Over the course of your career, was there a discovery or an incident that surprised you?

My time with OSPR has been full of surprises, but the biggest one so far was learning about the history of oil in California. I had no idea that California played such a large role in oil production for the nation. Seeing the extensive Central California oil fields was a huge eye-opener, and it felt like I was on a whole new planet that I did not know existed. Here was black, sticky oil literally oozing out of the ground from natural seeps! The same seeps that created the tar-pit-death-traps for countless prehistoric creatures! How did I miss this my whole life?

If you had free reign and unlimited funding, what scientific project would you most like to take on?

I would love to train an oil detection dog to aid with oil spill response. Dogs are amazing creatures and can perform many tasks that could benefit the spill response community. Their capacity for scent detection and differentiation could really change the way we respond to oil spills in the state, and the department already has a wonderful infrastructure to support this type of project.

Do you have any advice for people considering careers in science or natural resources?

Get as much experience early on as you possibly can! The competition for entry-level natural resources and science jobs can be fierce, and oftentimes it is that little bit of volunteer time you had at that lab, or the summer you spent doing field work banding birds that can make all the difference.

The field of science is extremely broad, so I would recommend trying to identify the specific job you would like to do and spend your time gaining experience relevant to that position. During college, I spent a lot of my undergraduate time as a research assistant on various research projects, working for graduate students and research labs on campus. These jobs can provide you with the hands-on experience employers look for when hiring for entry-level positions.

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CDFW Photos courtesy of Mia Roberts. Top Photo: Mia Roberts helping perform kangaroo rat surveys in West Kern County with our fellow environmental scientists from Region 4. The animal she is holding is a federally endangered giant kangaroo rat (Dipodomys ingens).