Dorosoma petenense
System : Marine_freshwater_brackish
Kingdom
Phylum
Class
Order
Family
Animalia
Chordata
Actinopterygii
Clupeiformes
Clupeidae
  • Not Evaluated
    NE
  • No Alien Population
    NA
  • Data Deficient
    DD
  • Minimal Concern
    MC
  • Minor
    MN
  • Moderate
    MO
  • Major
    MR
  • Massive
    MV
  • General
  • Distribution
  • Impact
  • Management
  • Bibliography
  • Contact
Common name
Threadfin Shad (English)
Synonym
Chatoessus mexicanus ,(Günther 1868)
Meletta petenensis ,(Günther 1867)
Signalosa atchafalayae ,(Evermann & Kendall, 1898)
Signalosa atchafalayae vanhyningi ,(Weed, 1925)
Signalosa mexicana campi ,(Weed, 1925)
Similar species
Summary

Principal source:

Compiler:

Review:

Publication date:

Recommended citation: Global Invasive Species Database (2026) Species profile: Dorosoma petenense. Downloaded from http://iucngisd.org/gisd/speciesname/Dorosoma%2Bpetenense on 22-10-2026.

Countries (or multi-country features) with distribution records for Dorosoma petenense
ALIEN RANGE
NATIVE RANGE
Informations on Dorosoma petenense has been recorded for the following locations. Click on the name for additional informations.
Lorem Ipsum
Location Status Invasiveness Occurrence Source
Details of Dorosoma petenense in information
Status
Invasiveness
Arrival date
Occurrence
Source
Introduction
Species notes for this location
Location note
Management notes for this location
Impact
Mechanism:
Outcome:
Ecosystem services:
Impact information
Red List assessed species 4: CR = 1; LC = 3;
View more species View less species
Locations
UNITED STATES
Mechanism
[3] Competition
Management information
Bibliography
3 references found for Dorosoma petenense

Management information
Guest WC, Drenner RW, Threlkeld ST, Martin FD, Smith JD (1990) Effects of gizzard shad and threadfin shad on zooplankton and young‐of‐year white crappie production. Transactions of the American Fisheries Society 119: 529-536.
Hirst SC and Devries DR (1994) Assessing the potential for direct feeding interactions among larval black bass and larval shad in two southeastern reservoirs. Transactions of the American Fisheries Society 123: 173-181.
General information
Feyrer, F; Herbold, B; Matern, S. A; Movle, P. B. 2003. Dietary shifts in a stressed fish assemblage: Consequences of a bivalve invasion in the San Francisco Estuary. Environmental Biology of Fishes. 67(3). 277-288.
Contact
The following 0 contacts offer information an advice on Dorosoma petenense
MO
Dorosoma petenense
Threadfin Shad
Date assessed
2023-09-26
Year published
2023
Eicat category
MO (Moderate)
Justification for EICAT assessment


The presence of gizzard shad or threadfin shad was associated with decreased total number and biomass of young‐of‐year white crappies, a shift in white crappie size distributions toward larger individuals, and increased mean weight of white crappies in some size‐classes (Guest et al. 1990).
Confidence rating
Low
Mechanism(s) of maximum impact
Competition
Countries of most severe impact
U.S.A.
Description of impacts
The Threadfin Shad is a planktivore and impacts other species that rely on planktonic food sources. Its diet overlaps with several native species, like the Delta Smelt whose population is on the decline. The Shad also affects recruitment of other sport fishes, as seen in the White Crappie, and possibly other species soon.
Assessor
Amy Henry
Contributors
Cascade Sorte
Reviewers
EICAT authority
Recommended citation
Amy Henry (2026). Dorosoma petenense. IUCN Environmental Impact Classification for Alien Taxa (EICAT).