Featured Scientist

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  • June 4, 2018

Restrained bear laying on back with belly exposed while two men in jackets look to an ultrasound monitor
Brandon Munk performs an ultrasound exam on a black bear to determine pregnancy. CDFW photo: Travis VanZant.

Man in blue CDFW uniform carries small bear with large mask covering bear's face
Brandon Munk moves an anesthetized bear club to an exam table. CDFW photo Travis VanZant.

Large restrained male deer laying on yellow tarp outside while woman holds head and antlers as man places stethoscope over deer's heart and another man looks on.
Brandon Munk tends to a deer which was tranquilized and treated after its antlers became snagged in a plastic fence. CDFW photo: Steve Torres.

CDFW Veterinarian Brandon Munk joined CDFW’s Wildlife Investigations Laboratory as the veterinary lead for the deer, bear and restricted species programs just over two years ago. Currently, he is acting as the veterinary lead for all big game species. The Wildlife Investigations Laboratory was established in 1941 to conduct wildlife disease investigations. Over the years, its responsibilities have increased to include: the statewide investigation of wildlife mortality events; wildlife disease surveillance and research; wildlife health monitoring and research; prevention of wildlife diseases; wildlife project and capture support; wildlife rehabilitation; injured and nuisance wildlife; wildlife handling and safety training; the statewide pesticides in wildlife program; wildlife conflict and human dimensions programs; wolf and lion species programs; biometrics; and wildlife conservation genetics.

Brandon completed a Master’s of Science in behavioral ecology at the University of Wyoming prior to pursing his Doctor of Veterinary Medicine (DVM) at Colorado State University. After receiving his DVM, Brandon began his career as a wildlife veterinarian by spending three years as a Post-Doctoral Research Associate at the University of Georgia’s Southeastern Cooperative Wildlife Disease Study (SCWDS) working as a wildlife diagnostician, wildlife disease specialist, and chronic wasting disease coordinator. While at SCWDS Brandon honed his skills and expertise in pathology, diagnostics and wildlife diseases by providing support to state and federal wildlife agencies. Brandon also spent time as a small animal and exotic animal clinician before finally landing a wildlife veterinarian’s dream job at CDFW.

What prompted your choosing a career as a veterinarian?

I have always held a keen interest in medicine and have always been passionate about animals, particularly wildlife, and the outdoors. However, I had always thought academia was the only path for someone with such interests. It was not until I was well into my 20s that I met some fairly non-traditional science professionals and began exploring a career in veterinary medicine. I spent time volunteering at veterinary clinics and fell in love with the diversity of veterinary medicine. I pursued my Masters while exploring vet schools and consider myself very fortunate to have been able to participate in and complete both programs, gaining very different experiences and training from each.

You joined CDFW fairly recently. What attracted you to the department?

The field of wildlife medicine is still fairly new and quite small, with few opportunities to mentor under or collaborate directly with other wildlife veterinarians. The department provided a very unique opportunity to do both with three wildlife veterinarians at the WIL, a fourth with the Office of Spill Prevention and Response, and others working for Fisheries. There are exceedingly few wildlife agencies with this number and diversity of veterinarians. This was truly a unique opportunity!

What is a typical day like for you at work?

Hard to predict. While at the office I may be: performing necropsies (animal autopsies) as part of a mortality investigation; immobilizing injured or conflict bears for exams or transfer; training department staff on wildlife disease investigations, wildlife restraint or chemical immobilizations; fielding phone calls from biologists about sick, injured, conflict or research animals; working with biologists to initiate and support wildlife capture activities; coordinating statewide wildlife disease surveillance activities; coordinating with other state or federal animal or public health agencies on disease of mutual concern; and the list goes on. My days spent in the field, somewhat surprisingly, tend to be a little more predictable. On game captures I am responsible for the safety and welfare of the animals captured, whether it’s treating wounds, providing prophylactic treatments, ensuring animals are as comfortable as possible while being handled, or training new staff in some of these key animal welfare duties.

What is the most rewarding project that you have worked on thus far at CDFW?

The Sierra Nevada bighorn sheep recovery project. The species has such a storied history and a very dedicated conservation following. I have been the primary veterinarian on that project for the last year, involved with captures and disease surveillance. The people involved with the recovery project, both department staff and volunteers, are amazing and intensely dedicated to the effort. 

What aspect of working in the Wildlife Investigations Lab is unique?

The diversity in expertise, from veterinarians to geneticists, ecologists, disease biologists and toxicologists. There is a ton of expertise here, it’s quite amazing!

What is your favorite species to interact with or study?

I like them all, but interact most frequently with deer and bear. I like deer because they may be the most important herbivores on the landscape and as such fill an important ecological role. From a wildlife health perspective, we know more about deer then many of the other species we work with, which means I have a broader knowledge base to work from. Bighorn sheep are an equally interesting species from a wildlife health perspective because there are a few well-documented and important disease issues to consider. Sheep are also one of the more forgiving species to actually handle – they tend to be more calm and tractable while in hand, relative to our other game species at least. Bear are interesting from a wildlife health perspective because there is very little known about the diseases affecting them. Plus, bears are just pretty darn cool critters in general. Elk are a majestic species and in many ways similar to deer but with some very different peculiarities. Antelope offer some very unique challenges, as they tend to be difficult to capture and to work with safely, but are amazingly adapted animals. Pigs are extremely adaptive animals that can act as reservoir hosts for various diseases of wildlife, livestock and public health concerns, and as such offer some unique challenges. However, if the question is what are my favorite animals to actually have in hand and work with, I would have to say deer. 

Which species is the most difficult to work on and why?

In the broadest sense, I’d have to say that some of our sheep species are the most difficult to work on. Not so much because of difficulties while in hand, but more so because of their remoteness and the logistics of their capture. It takes massive group efforts to safely and successfully capture bighorn sheep.

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

Determining the ecological health significance, if any, of micronutrient deficiencies, specifically selenium and copper, in deer and other free-ranging ungulates. Selenium and copper deficiencies are fairly common findings in deer throughout California. Indeed, selenium and copper deficiencies are also important diseases in domestic ungulates throughout much of California. Both selenium and copper are important for normal immune function and deficient animals may be more susceptible to infectious diseases or other conditions. Empirical evidence suggests that low selenium may decrease fecundity (fertility) and fawn recruitment, at least at the individual animal level. I’d like to study whether there are measurable population health effects, and if so, what management practices might increase the bioavailability of copper and selenium for these species.

Any advice for people considering careers in science or natural resources?

Love what you do, because it is rarely easy.

CDFW Photos. Top Photo: Brandon Munk completes a physical exam on an anesthetized bear cub. The black bear was captured by CDFW wildlife officers due to human-wildlife conflict and was later placed at the Oakland Zoo. 

Categories: Featured Scientist
  • April 25, 2017

Krysta Rogers is a senior environmental scientist at CDFW’s Wildlife Investigations Laboratory. She is the statewide lead for avian mortality investigations. Her professional experience has been focused almost exclusively on birds, including bird identification, biology, ecology and behavior. She has led and participated in numerous field projects including bird surveys, trapping, banding and sample collection.

Krysta earned both her Bachelors and Masters of Science degrees in Wildlife from Humboldt State University. She came to CDFW in 2007 as a wildlife biologist, starting out as the avian influenza surveillance coordinator. She subsequently worked on developing the lab’s Avian Investigations program, which includes mortality investigations, disease research and health surveillance for the many different bird species in California.

Who or what inspired you to become a scientist?

I had an interest in animals from a very young age and pursued this initially in the field of veterinary medicine. Although I enjoyed the animal health aspect, I learned I did not want to become a veterinarian in a small animal practice. I was unaware of other career possibilities until I took an elective course on endangered species at my local community college. The class introduced me to the career of wildlife biologist which subsequently informed my decision to attend Humboldt State University to obtain a degree in Wildlife. Later, while working toward my Master’s degree, my thesis advisor, Dr. Rick Botzler, taught me how to incorporate my interest in animal health into the study of wildlife biology.

What is a typical day like for you at work?

woman pathologist examines a dead great horned owl on a laboratory exam table

As the lead for avian mortality investigations, I spend most of my time responding to reports of dead birds from CDFW staff, other agencies, wildlife rehabilitation centers and the public. Given that most birds are active during the day and are thus highly visible to the public, these reports come in almost constantly. For investigations, I obtain carcasses for post-mortem exam to determine the cause of death, which may inform management actions. I either will perform the gross necropsy myself and submit various tissues for testing, or I will coordinate with another lab for the post-mortem exam and testing. Then I interpret the results and determine the next course of action. These investigations are varied – for instance, house finches and mourning doves dying from diseases at backyard bird feeders, juvenile California scrub jays and Cooper’s hawks dying of West Nile virus, Western and Clark’s grebes dying from starvation along the coast and at inland reservoirs, or bald and golden eagles dying of toxicosis or electrocution.

What is your favorite species to interact with or study?

It’s impossible to pick a single species; I’m interested in birds in general. There are more than 600 species of birds in California that live in a diversity of habitats. Different diseases or conditions can affect different species. This great diversity means always having the opportunity to learn something new in terms of species biology, a pathogen or environmental impacts.

What is it about the work you do that you find most interesting?

Investigating causes of mortality is almost like being a detective. You need to gather lots of detail and determine what factors are relevant to the cause of death for a particular animal. Sometimes this may be relatively easy with a pathogen or condition you routinely investigate, but sometimes it’s something entirely new. This aspect keeps the investigations interesting.

What is the most challenging part of your job?

One challenge is communicating the importance of incorporating animal health into resource management and conservation plans. For many avian species, we don’t have even a basic understanding of the impacts of diseases or contaminants that may influence population growth or decline. The lack of this information may limit our ability to manage species over the long-term, especially in the face of climate change. Climate change will almost certainly favor certain pathogens or host species that can aid in disease transmission.

What is the most rewarding project that you’ve worked on for CDFW?

So far, it’s been collaborating with researchers at the University of California, Davis to investigate avian trichomonosis in our native band-tailed pigeons. Avian trichomonosis is a disease caused by a protozoan parasite that in band-tailed pigeons causes near annual large-scale mortality events. This project enabled us to genetically characterize the parasites infecting band-tailed pigeons, including naming a new species of parasite, and evaluate the ecological drivers and the population impacts of these disease events on band-tailed pigeons, a migratory game species.

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

I’d like to work towards an improved understanding of the impacts certain pathogens have on different avian species. This would include genetically characterizing the pathogens, identifying host range, and learning how avian species interact with their environment and the means by which they are exposed to certain pathogens.

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

Because there are so many career options in the field of science and natural resources, I’d recommend trying to get exposed to a diversity of people and projects as early as possible (e.g. junior high, high school). This can be accomplished through interviewing professionals, volunteering, internships and paid jobs. Learning about the different career options enables you to determine your interests and will help guide your educational path and eventually your career goals.

Categories: Featured Scientist
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