Tribal monitoring programs spotlight surf‑ and night‑smelt declines and cultural impacts

Tribal resource staff from northern California briefed the California Estuary Monitoring Work Group on community‑led monitoring of surf (day) and night smelt, describing both methods and cultural stakes. At the June meeting, Tolowa and neighboring Yurok tribal representatives described multi‑year efforts that combine A‑frame net sampling, gravel‑bed mapping, eDNA sampling, and youth stewardship programs to document presence/absence and habitat conditions.

Rudy Lopez, a tribal travel/resource specialist with Tolowa Dee‑ni' Nation, said the surf smelt decline became noticeable “about, give or take, 10, 15 years ago,” prompting the tribe to establish a marine program to track eggs, substrate, and seasonal presence. Lopez described gravel‑bed mapping and seasonal eDNA sampling (begun about 2021) as key tools for locating spawning habitat and identifying absence versus presence where fish are rare.

Rayce Richards described night‑smelt field methods and processing logistics, noting night operations use spotlights and teams that run beaches for hours to collect catch‑per‑unit‑effort (CPUE) data. He said partners sometimes preserve tissue and otolith samples (for example, through collaborations with Humboldt State researchers), but that tribal teams often focus on culturally appropriate harvest, community distribution of catch, and capacity building through youth programs.

Presenters listed several likely contributors to population declines: coastal urbanization and recreational use that make formerly remote spawning beaches more disturbed; invasive European beach grasses that alter sand movement and reduce suitable gravel beds; localized light pollution; and possible climate‑driven changes in wave conditions that influence the narrow window when surf smelt can spawn. “Our beaches are getting shorter and shorter every year,” one presenter said, noting that shifts in gravel distribution may require 5–10 years of data to interpret trends.

Attendees asked about pre/post MPA monitoring and commercial harvest impacts. Presenters said MPA designations sometimes include tribal take exemptions; in the Tolowa area the tribe retains a travel exemption for traditional harvest, and the marine program partly grew out of efforts to document tribal harvest and protect access. On commercial fishing, presenters reported limited commercial activity in their monitored areas because of MPA protections, and recommended further study to assess offshore‑onshore links.

Speakers emphasized that monitoring is not only an ecological exercise but a cultural one: declines in smelt reduce opportunities to practice and teach traditional harvesting and processing, undermining cultural transmission. Several participants encouraged partnerships where tribal priorities — species and locations of cultural importance — drive research questions and data‑sharing agreements.

The CEMW co‑chairs and participants discussed ways regional networks and state programs could support tribal monitoring, including data hosting options that respect tribal data sovereignty. Presenters offered to share slide decks and sampling protocols with the work group for follow‑up coordination.

The presenters’ materials and a Q&A summary will be shared with meeting notes; tribes asked collaborators to reach out to coordinate tissue analysis, longer‑term CPUE protocols, and expanded eDNA sampling.