Associates & Affiliates

Dr. Paul C. Marsh
Owner and PI

Ph.D. 1979, University of Minnesota

Ecology and Conservation of Southwestern Fishes

Dr. Marsh’s research deals broadly with aquatic ecology in the arid southwest, with emphasis on the community of imperiled native fishes of the region (the suite of indigenous taxa occupying a diversity of aquatic habitats in western United States and Mexico). Laboratory investigations supplement a strong field program examining basic life history characteristics and population and community biology. These pursuits go hand-in-hand with applied management in behalf of target species. Activities are strongly collaborative with academia, state and federal resource agencies, non-governmental organizations, and the private sector.

Beverly Ross
General Manager

B.S. Accountancy, National University

Beverly has worked as a contractor for the Native Fish Lab since 2009 and became a full time employee August of 2014. Her love of the outdoors makes her office work easy to be passionate about. She is also the Treasurer of Marsh Education, and dedicated to get Sharing Tails back in Arizona schools.

Brian Kesner
Senior Project Manager

M.S. 2004, James Cook University, Queensland, Australia

Brian is interested in quantitatively assessing the status and trends of ‘big river’ native fish stocks in the Colorado River. His approach uses standard statistical techniques but he also is developing and applying techniques that are unique to the type of data available and the difficulties associated with data for species that are rare and reintroduced. He also likes to get his feet wet occasionally and assists with monitoring programs throughout the Colorado River basin in Arizona and farther a field. Brian has worked with Dr. Marsh and the Native Fish Lab since 1998.

Carol Pacey
Project Manager

M.S. 1996, Texas A&M University

Ms. Pacey has been with the Native Fish Lab since 1998 and plays multiple roles within the organization. She developed and presents statewide the wildly successful “Sharing Tails” educational program that teaches kindergarten and early elementary school children about native Arizona fishes (see the link above and on our home page). She also is responsible for primary maintenance of the lower Colorado River native fishes PIT tag mark and recapture database and analyzes and interprets field data for reports and publications. When not too busy with other duties she assists with field and laboratory work, makes presentations to professional groups, attends meetings, and interacts with M&As myriad cooperators.

Jamie Leavitt
Fisheries/Aquatic Biologist

M.S. 2011, Miami University

Jamie moved from Kentucky to Arizona in June of 2013 to join the Native Fish Lab. At M&A, Jamie is the lead on a project monitoring razorback sucker in Lake Mohave; she also creates presentations and technical documents for various projects, serves on the outreach and social media team for the Desert Fishes Council, and was an assistant during an acoustic telemetry project on Utah Lake in Provo, Utah. Prior to her beginnings at M&A, Jamie discovered her interest in aquatic science through an internship at the Thomas More College Biology Field Station and subsequently received a Bachelor of Arts Degree in Biology from Thomas More. Jamie went on to earn her Master of Environmental Science Degree from Miami University with a concentration in water resources. Before joining the M&A team, she worked with the ORSANCO biological survey crew to monitor health of small streams and rivers in the Ohio River watershed. Jamie is trained in CPR, first-aid, and boater’s safety.

Wesley Goldsmith
Fisheries Assistant

Wesley started working at Marsh & Associates in December of 2016. At the Native Fish Lab, Wes is the lead biologist on a post-stocking survival study of June Sucker on Utah Lake, Utah and the co-lead of bonytail and razorback sucker remote monitoring on Reach 4/5 of the Colorado River. Wes has also assisted on a range of other projects including an Amargosa pupfish survey in Death Valley National Park and bonytail telemetry in Lake Havasu. Before moving to the desert southwest in December of 2015, Wes worked as a fisheries aide at the Indiana DNR. He is an Indiana native and earned a Bachelor of Science in Fisheries and Aquatic Sciences from Purdue University. Wes is an avid fisherman, certified in CPR and first-aid, and has extensive experience with watercraft of all kinds.

Taylor Haas
Fishery Assistant

Taylor from Tyler, TX, graduated from the University of Oklahoma in 2014 with a B.S in Zoology and has been working to conserve the natural world ever since. The first two years upon graduation, Taylor called the Rocky Mountains of Colorado and Wyoming home, where he worked in Environmental Education. In the Spring of 2016 the ski boots were replaced by waders when Taylor began his work with Desert Fish Conservation in Safford, AZ for the Bureau of Land Management. Hired in January of 2017, Taylor does a plethora of things for M&A, but you can usually find him in the field tracking down the “Big Fishes” of the Colorado River or in the shop building and repairing bioelectronic equipment.

Lara McCall
Fishery Assistant

Lara started with us in June 2016. Details forthcoming.