Esox americanus vermiculatus  Lesueur, 1846

Grass pickerel
Upload your photos and videos
Pictures | Google image
Image of Esox americanus vermiculatus (Grass pickerel)
Esox americanus vermiculatus
Picture by The Native Fish Conservancy

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Esociformes (Pikes and mudminnows) > Esocidae (Pikes)
Etymology: Esox: From Greek, isox and also related with the Celtic root, eog, ehawc = salmon (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; benthopelagic; non-migratory.   Temperate

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 37.6 cm TL male/unsexed; (Ref. 3672); max. published weight: 450.00 g (Ref. 4699)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Anal spines: 0. Body robust, long, cylindrical, cross-section almost circular with flattened to slightly concave dorsal surface. Head large, flat, naked on top. Right branchiostegal membrane usually overlaps left. Snout short, broad spatulate, dorsal surface between raised orbits and tip of snout slightly concave. Mouth large, horizontal, lower jaw extending slightly beyond upper, maxillary usually not reaching beyond middle of pupil or to suborbital bar. Teeth moderately large, those in front of upper jaw and several along each side of ramus a little enlarged; cheek and opercle fully scaled. Gill rakers are reduced to patches of sharp denticles. Cardioid scales between pelvic fins 0-5, intergrades 0-26; notched scales in a line between dorsal and anal fin origins 0-8, intergrades 1-22. Pigmentation: Olivaceous to black above; belly pale amber to white, sometimes mottled wit dark; mid-dorsal band from nape to dorsal fin origin inconspicuous, rusty brown. Sides with 15-23 olive to black wavy vertical bars separated by paler extensions of what had been lateral band in young, pale area between adjacent bars wider than bars. Suborbital and preorbital black bars pronounced, suborbital straight and vertical, postorbital horizontal; lateral edges of jaws lightly pigmented. Pupil yellow to yellow green, iris gold. Dorsal fin darkly pigmented, leading edge of all fins black, remainder dusky to amber.

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri

North America: Great Lakes basins north to southern Ontario in Canada and Michigan, Wisconsin and Nebraska in USA; Mississippi River and Gulf Slope drainages west of Pascagoula River in Mississippi to Brazos River in Texas, USA.

Biology     Glossary (e.g. epibenthic)

Inhabits lakes, swamps and backwaters and sluggish pools of streams. Occurs usually among vegetation in clear water (Ref. 5723). Oviparous (Ref. 205).

Main reference Upload your references | References | Coordinator | Collaborators

Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. Common and scientific names of fishes from the United States and Canada. Am. Fish. Soc. Spec. Pub. (20):183 p.

IUCN Red List Status (Ref. 90363)

Threat to humans

  Harmless




Human uses

Fisheries: of no interest; gamefish: yes; aquarium: public aquariums
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance
References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Download XML

Internet sources

Alien/Invasive Species database | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00468 (0.00242 - 0.00904), b=3.08 (2.91 - 3.25), based on LWR estimates for species & Genus-BS (Ref. 93245).
Trophic Level (Ref. 69278):  3.7   ±0.57 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.3).
Vulnerability (Ref. 59153):  Moderate vulnerability (41 of 100) .
Price category (Ref. 80766):   Unknown.