Emerald Shiner / Notropis atherinoides

At-a-glance biology

• Size: Age 0 YOY 15-33 mm (~0.6-1.3 in), Age I 39-78 mm (~1.5-3.1 in), Age II+ 78-111 mm (~3.1-4.4 in) in Lake Erie Western Basin per Atkinson et al. 2015 (Tier 3 Ohio Journal of Science). Maximum recorded 13 cm (~5.1 in) per Tier 3 USGS NAS. Translation hook size 2-6 for the 2-4 in adult body length band.
• Presence window: spring nearshore/tributary movement April-May (Tier 1 NYSDEC); summer offshore central Lake Erie pelagic May-October (Tier 3 Pothoven et al. 2009). Year-round open-water presence is consistent with multi-agency trawl methodology but is [source-required] as a directly sourced claim. Fall return to nearshore [source-required].
• Current population status: ODNR's 2024 Lake Erie Fisheries Annual Report (April 2025, Tier 1) and the GLFC March 2026 Forage Task Group report (Tier 1) document a decade-long low-abundance trend. Anglers should not assume historical-abundance shiner schools as a default expectation.
• Lifecycle scope: indeterminate growth per Atkinson et al. 2015. Juveniles favor natural habitat (e.g. marshes) over developed habitat (e.g. seawalls) in the Upper Niagara per USGS NAS.
• Habitat: "Commonly found in clear water over sand and gravel sediments within lakes and medium to large rivers" per Tier 3 USFWS ERSS (July 2025). Pelagic open-lake summer presence documented in central Lake Erie.
• Predator role: Lake Erie steelhead primary baitfish (Tier 1 GLFC 2004); historical YOY walleye fall-shift forage (Tier 3 USGS); spring smallmouth bass nearshore feed (Tier 1 NYSDEC guidance); minor yellow perch diet item (Tier 1 NYSDEC 2024).

Source-disciplined claim summary

The single load-bearing claim on this card is the Tier 1 anchor: per the GLFC Coldwater Task Group's "Analysis of the Diet of Steelhead Trout in Lake Erie" (~2004 final report, n=349 stomachs across basins with 250 containing food), emerald shiner is the major baitfish in Lake Erie steelhead diet. In the West Central Basin June-October overall, species-confirmed emerald shiner represents 47.7% frequency-of-occurrence and 57.71% dry-weight biomass; the combined shiner group (emerald shiner plus unidentified Notropis spp.) reaches 67.5% frequency and 70.47% biomass. The August West Central monthly peak exceeded 76% frequency and 69% biomass -- this is a monthly peak, not an overall metric. For general claims use the 47.7% / 57.71% overall species-confirmed value; cite the August peak only when discussing seasonal concentration.

Biological size-at-age comes from Atkinson et al. 2015 (Tier 3, Ohio Journal of Science, n=400 from Western Basin coastal + open-water habitats). The 78-111 mm Age II+ range is the dominant adult class targeted by predators; the 2.0-4.0 in angler-translation streamer band aligns with the Age I + Age II+ range. NYSDEC's Smallmouth Bass Fishing On Lake Erie page documents shiner schools moving into warmer nearshore/tributary/harbor zones in April-May with smallmouth bass actively feeding on them, and explicitly recommends "woolly buggers and minnow patterns, especially emerald shiner patterns" -- a Tier 1 guidance anchor for the spring smallmouth shiner-feeding behavior.

The current-population caveat is non-optional: per Tier 1 ODNR (April 2025) and Tier 1 GLFC Forage Task Group (March 2026), emerald shiner abundance has remained low for roughly a decade. The historic 1990s-2000s shiner-school densities are not the contemporary baseline; shiner patterns should be one option in the streamer rotation, not the default search pattern.

Honest gaps

• Tributary-specific shiner-mouth aggregation timing for named Steelhead Alley rivers [source-required].
• Quantitative current adult Lake Erie walleye selectivity for emerald shiner [source-required]. Historical YOY and 1959-1960 year-class walleye selectivity is Tier 3 source-backed via USGS, but does not document contemporary adult walleye diet.
• Quantitative smallmouth bass diet selectivity for emerald shiner [source-required]. NYSDEC 2024 (n=25 smallmouth stomachs, late-summer Eastern Basin) did NOT document shiners in smallmouth stomachs -- the NYSDEC guidance-backed spring shiner behavior and the 2024 quantitative summer sample are not the same evidence.
• Brown trout diet selectivity for emerald shiner [source-required] -- the GLFC 2004 steelhead diet study does not separately cover brown trout.
• Predator size-class selectivity (which shiner age class each predator size targets) [source-required].
• Wind-driven nearshore concentration and pier/breakwall window quantitative claims [source-required] at Tier 1-3.
• Lake Ontario applicability [source-required].

Where this matters to anglers

Working streamers: Zonker (white/silver), Clouser Minnow (white/chartreuse), Woolly Bugger (white), Sparkle Minnow. White/silver/pearl is the baseline; chartreuse and flash for stained or muddy water visibility per the SHA angler-translation heuristic. Swing through current breaks at tributary mouths and lower-river runs; strip-retrieve along pier and breakwall structure during nearshore concentration windows; downsize for selective steelhead in clear cold water.

The most defensible single sourced window for shiner-imitation fishing is the April-May spring nearshore/tributary movement per NYSDEC. The Lake Erie steelhead anchor (GLFC 2004 Tier 1) supports steelhead targeting on shiner patterns broadly during the West Central Basin June-October overall window in the documented era; the contemporary decade-low abundance is the load-bearing reason not to assume historic efficacy at current densities. Brown trout selectivity and named-tributary timing windows remain translation heuristics, not source-backed claims.

See also

• Emerald Shiner Lifecycle -- the long-form narrative pillar covering full lifecycle, predator-prey dynamics, and the contemporary decade-low population context.
• Steelhead Alley Forage Briefing -- the GLFC 2004 anchor in narrative pillar form: what Lake Erie steelhead actually eat, with shiner at the top of the list.
• Source Discipline and the Tier Hierarchy -- the Tier 1-3 evidence framework behind every source-status label on this page.

Source list