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Overview

Steven J. Jeffries is affiliated with the Washington Department of Fish and Wildlife in the United States. Their research focuses predominantly on environmental science with a concentration in marine animal studies and ecology. Their work spans several interconnected subfields including ecology, global and planetary change, ocean engineering, nature and landscape conservation, and molecular biology.

The main topics addressed by Jeffries' research include marine animal studies overview, maritime navigation and safety, marine and fisheries research, fish ecology and management studies, avian ecology and behavior, environmental DNA in biodiversity studies, and identification and quantification in food.

Jeffries has contributed to multiple recent publications, notable among them are:

  • Causes of Mortality in a Harbor Seal (Phoca vitulina) Population at Equilibrium, 2020, published in Frontiers in Marine Science
  • Data on the diets of Salish Sea harbour seals from DNA metabarcoding, 2022, published in Scientific Data
  • Variation in predator diet and prey size affects perceived impacts to salmon species of high conservation concern, 2021, published in Canadian Journal of Fisheries and Aquatic Sciences
  • Cetacean Strandings in the US Pacific Northwest 2000-2019 Reveal Potential Linkages to Oceanographic Variability, 2022, published in Frontiers in Marine Science
  • Reemergence of Guadalupe fur seals in the U.S. Pacific Northwest: The epidemiology of stranding events during 2005-2016, 2020, published in Marine Mammal Science

Jeffries frequently publishes in scientific journals such as Frontiers in Marine Science and Marine Mammal Science, with additional works appearing in Scientific Data, Canadian Journal of Fisheries and Aquatic Sciences, and the Journal of Wildlife Management.

Collaborations are a significant aspect of Jeffries' scientific contributions. Frequent co-authors include Scott F. Pearson, Jennifer K. Olson, Stephen Raverty, Joseph K. Gaydos, and Jessica L. Huggins. Each has collaborated with Jeffries on multiple projects, reflecting ongoing partnerships within the research community.

Best Publications

  • Trends and status of harbor seals in Washington State: 1978-1999

    Steven Jeffries;Harriet Huber;John Calambokidis;Jeffrey Laake

  • Harbor seals (Phoca vitulina) in British Columbia, Canada, and Washington State, USA, reveal a combination of local and global polychlorinated biphenyl, dioxin, and furan signals.

    Peter S. Ross;Steven J. Jeffries;Mark B. Yunker;Richard F. Addison

  • PCB-related alteration of thyroid hormones and thyroid hormone receptor gene expression in free-ranging harbor seals (Phoca vitulina).

    Maki Tabuchi;Nik Veldhoen;Neil Dangerfield;Steven Jeffries

  • Abundance and distribution of the eastern North Pacific Steller sea lion (Eumetopias jubatus) population

    Kenneth W. Pitcher;Peter F. Olesiuk;Robin F. Brown;Mark S. Lowry

  • Evidence of Brucella infection in Parafilaroides lungworms in a Pacific harbor seal (Phoca vitulina richardsi).

    Michael M. Garner;Dyanna M. Lambourn;Steven J. Jeffries;P. Briggs Hall

  • CORRECTING AERIAL SURVEY COUNTS OF HARBOR SEALS (PHOCA VITULINA RICHARDSI) IN WASHINGTON AND OREGON

    Harriet R. Huber;Steven J. Jeffries;Robin F. Brown;Robert L. Delong

  • Competing tradeoffs between increasing marine mammal predation and fisheries harvest of Chinook salmon.

    Brandon E. Chasco;Brandon E. Chasco;Isaac C. Kaplan;Austen C. Thomas;Alejandro Acevedo-Gutiérrez

  • Harbor Seal Diet in Northern Puget Sound: Implications for the Recovery of Depressed Fish Stocks

    Monique M. Lance;Wan-Ying Chang;Steven J. Jeffries;Scott F. Pearson

  • Contaminant-related disruption of vitamin a dynamics in free-ranging harbor seal (Phoca vitulina) pups from british columbia, canada, and washington state, usa

    Wendy Simms;Steven Jeffries;Michael Ikonomou;Peter S. Ross

  • Estimates of Chinook salmon consumption in Washington State inland waters by four marine mammal predators from 1970 to 2015

    Brandon Chasco;Isaac Kaplan;Austen Thomas;Alejandro Acevedo-Gutiérrez

  • Incidence of ship strikes of large whales in Washington State

    Annie B. Douglas;John Calambokidis;Stephen Raverty;Steven J. Jeffries

  • GROWTH AND DEVELOPMENT IN FREE‐RANGING HARBOR SEAL (PHOCA VITULINA) PUPS FROM SOUTHERN BRITISH COLUMBIA, CANADA

    Paul E. Cottrell;Steven Jeffries;Brian Beck;Peter S. Ross

  • Declining concentrations of persistent PCBs, PBDEs, PCDEs, and PCNs in harbor seals (Phoca vitulina) from the Salish Sea

    Peter S. Ross;Marie Noël;Marie Noël;Dyanna Lambourn;Neil Dangerfield

  • GENETIC SUBSTRUCTURE OF THE PACIFIC HARBOR SEAL (PHOCA VITULINA RICHARDSI) OFF WASHINGTON, OREGON, AND CALIFORNIA

    Margaret M. Lamont;J. T. Vida;James T. Harvey;Steven Jeffries

  • Detection of Pathogenic Leptospira Bacteria in Pinniped Populations via PCR and Identification of a Source of Transmission for Zoonotic Leptospirosis in the Marine Environment

    Caroline E. Cameron;Richard L. Zuerner;Stephen Raverty;Kathleen M. Colegrove;Kathleen M. Colegrove

  • Predator-prey interactions between harbor seals and migrating steelhead trout smolts revealed by acoustic telemetry

    B. A. Berejikian;M. E. Moore;S. J. Jeffries

  • New insights into the diets of harbor seals (Phoca vitulina) in the Salish Sea revealed by analysis of fatty acid signatures

    Jeffrey F. Bromaghin;Monique M. Lance;Elizabeth W. Elliott;Steven J. Jeffries

  • Long distance movements and disjunct spatial use of harbor seals (Phoca vitulina) in the inland waters of the Pacific Northwest.

    Sarah H. Peterson;Monique M. Lance;Steven J. Jeffries;Alejandro Acevedo-Gutiérrez

  • Haul-Out Behavior of Harbor Seals (Phoca vitulina) in Hood Canal, Washington

    Josh M. London;Jay M. Ver Hoef;Steven J. Jeffries;Monique M. Lance

  • Persistent organic pollutants in the diet of harbor seals (Phoca vitulina) inhabiting puget sound, washington (USA), and the strait of Georgia, British Columbia (Canada): A food basket approach

    Donna L. Cullon;Steven J. Jeffries;Peter S. Ross

Frequent Co-Authors

John Calambokidis
John Calambokidis Washington University in St. Louis
Peter S. Ross
Peter S. Ross Raincoast Conservation Foundation
Kristin L. Laidre
Kristin L. Laidre University of Washington
Frances M. D. Gulland
Frances M. D. Gulland University of California, Davis
Jack C. Rhyan
Jack C. Rhyan Animal and Plant Health Inspection Service
Donald P. King
Donald P. King The Pirbright Institute
Michael G. Ikonomou
Michael G. Ikonomou Fisheries and Oceans Canada
Richard L. Zuerner
Richard L. Zuerner United States Department of Agriculture
Lisa T. Ballance
Lisa T. Ballance Oregon State University
Jonna A. K. Mazet
Jonna A. K. Mazet University of California, Davis

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