Wild capture fisheries supply food and jobs for hundreds of millions of people across the globe. Yet an estimated 68% of global fisheries are overfished, contributing to food insecurity, economic impacts, and an erosion of biodiversity. Ocean health and sustainable fisheries both depend on effective fisheries management.

Effective management of fisheries requires three fundamental elements: data collection, stock assessment and implementation of effective rules and regulations. Innovative approaches and technological solutions such as data-limited assessments, electronic monitoring, and co-management can address these needs, but have yet to be scaled broadly.

California fisheries supply more than 250 species of local seafood. The Conservancy aims to ensure these fisheries are managed sustainably with cutting edge approaches and technology that improve the environmental and economic performance of fisheries, protect habitats and vulnerable species, reduce bycatch, and serve as a model for global fisheries management reform. 

Science in Action

Marine | Technology | Science

Closing the Abalone Data Gap

Can putting technology in the hands of citizen scientists transform how abalone are managed?

Marine | Planning | Science

FishPath

How can we help small-scale and data-limited fisheries manage their resource sustainably?

2017 | Marine | Technology | Science | Video

Aquaculture by Design, Tomales Bay

Serena Lomonico, Robert Jones, Torrey Johnson, Sarah Newkirk, Sarah Lummis, Kirk Klausmeyer, John Finger, Terry Sawyer, Richard James

Aquaculture is becoming an increasingly important global food source. With this growth comes urgent, unanswered questions about the interactions of aquaculture operations—both positive and negative—and ecosystems. This video describes a collaboration between the Conservancy, the University of California, Santa Cruz, and Hog Island Oyster Company aimed at…


2017 | Marine | Technology | Video

Big Data and the Deep Blue Sea

The Nature Conservancy, Matt Merrifield

Nearly half of the world depends on seafood for their main source of protein. In the Western and Central Pacific, where 60% of the world’s tuna is caught, illegal, unreported, and unregulated fishing practices are threatening marine ecosystems, global seafood supplies and local livelihoods. This…


2016 | Marine | Economics | Science | Publications & Reports

Market and design solutions to the short-term economic impacts of marine reserves

Daniel Ovando, Dawn Dougherty, Jono R. Wilson

No-take marine reserves are a management intervention that can provide long-term fishery benefits. But, impacts of reserve implementation can negatively affect fishermen profits in the short term. This study examines how to overcome the losses in profit associated with implementing reserves. The authors found that creative…


2016 | Marine | Technology | Science | Video

Sustainable Management of Abalone Fishery in California

The Nature Conservancy, Jono Wilson

California fisheries, like the red abalone fishery, are facing increasing environmental variation and uncertainty due to climate change, complicating the sustainable management of commercial and recreational fisheries and threatening the resilience of fishing communities. To better manage these resources, better data is needed. In this video,…


2015 | Marine | Science | Video

Science for Nature and People Partnership: Data-Limited Fisheries Working Group

The Nature Conservancy, Jono Wilson

There are thousands of fisheries around the globe that lack the infrastructure, capacity, resources and management techniques to perform conventional assessments and management. We know that fisheries that get measured—that have stock assessments performed—are typically better managed, including increased regulation and enforcement. Conversely, when fisheries…


2015 | Freshwater | Marine | Publications & Reports

Climate mediates hypoxic stress on fish diversity and nursery function at the land–sea interface

Brent B. Hughes, Matthew D. Levey, Monique C. Fountain, Aaron B. Carlisle, Francisco P. Chavez, Mary G. Gleason

This comprehensive study of a major California estuary documents the links between nutrient runoff from coastal land use, the health of the estuary as a nursery for young fish, and the abundance of fish in an offshore commercial fishery. The researchers assembled long-term data sets…


2013 | Marine | Publications & Reports

A Transactional and Collaborative Approach to Reducing Effects of Bottom Trawling

Gleason M, Feller EM, Merrifield M, Copps S, Fujita R, Bell M, Rienecke S, Cook C

On the Central Coast of California, The Nature Conservancy, Environmental Defense Fund, local fishers and local, state, and federal authorities worked collaboratively to protect large areas of the seafloor from bottom trawling for groundfish while addressing economic impacts of trawl closures. This paper aims to…


2013 | Marine | Economics | Publications & Reports

Fort Bragg Central Coast Risk Pool Annual Summary Report 2012

Kate Labrum, Dwayne Oberhoff

In 2011, the west coast groundfish fishery transitioned into a catch share fishery, or Individual Fishing Quota management system. Under this type of management system, the annual total allowable catch is divided into shares, or quota, and allocated to individual fishermen. This report describes a…


2013 | Marine | Science | Publications & Reports

Central Coast Trawl Impact and Recovery Study: 2009-2012 Final Report

James Lindholm, Mary Gleason, Donna Kline, Larissa Clary, Steve Rienecke, Michael Bell

This report summarizes the results of a multi-year study (June 2009 to December 2012) to assess the impacts of bottom trawling on seafloor habitats and associated biological communities. This project used small foot-rope trawl gear in an experimental study conducted in unconsolidated, soft-sediment habitat on…


2012 | Marine | Planning | Science | Maps & Webmaps

California Coastal and Marine Program: Protecting Fish Stocks and Livelihoods

Matt Merrifield, Megan Webb, Katie Andrews

Since 2007, The Nature Conservancy has pioneered a first-of-its-kind fishery reform approach that aligns communities, the fishing industry, and conservation interests to drive strategic changes in fishery management and harvest practices. We have provided science and planning expertise and applied technology to increase efficiency and…


2012 | Freshwater | Marine | Science | Microsite

California Salmon Snapshots

Sally Liu, Megan Webb, Jeanette Howard, Jennifer Carah

The Nature Conservancy’s California Salmon Snapshots is a collaborative information-sharing effort, critical to the on-going recovery of the state's salmon species. This is the most comprehensive salmon information in California, combining the knowledge of the California Department of Fish & Wildlife, the National Marine Fisheries Service,…


2012 | Freshwater | Terrestrial | Marine | Science | Publications & Reports

Restoring Salmon Habitat: Garcia River Forest

Jennifer Carah, Jason Pelletier

A two-page summary of salmon restoration efforts at the Garcia River Forest on the North Cost of California focusing on the reintroduction of wood in streams as a strategy.


2012 | Freshwater | Terrestrial | Marine | Science | Video

Saving Salmon One Log at a Time

The Nature Conservancy, Jennifer Carah

Salmon and trout thrive in streams with cool water, low levels of sand and silt, and deep, shaded pools. Intensive forest management in California over the last 150 years led to the removal of these streamside trees, eliminating the cover that salmon depend upon. Restoration…


2012 | Marine | Planning | Publications & Reports

Near-term priorities for the science, practice, and policy of Coastal and Marine Spatial Planning

Halpern, B.S., Diamond, J., Gaines, S., Gelcich, S., Gleason, M., Jennings, S., Lester, S., Mace, A., McCook, L., McLeod, K., Napoli, N., Rawson, K., Rice, J., Rosenberg, A., Ruckelshaus, M., Saier, B., Sandifer, P., Sholtz, A., Zivian, A.

This paper informs emerging efforts to implement coastal and marine spatial planning (CMSP) in the United States, Europe and elsewhere around the world. In order to identify priority needs for significantly advancing CMSP, the authors—expertsexperts in the science, policy and practice of CMSP—developed recommendations for…