Grass pickerel (Esox americanus vermiculatus) fish species and information / pictures of Grass pickerel - Esox americanus vermiculatus

Grass pickerel (Esox americanus vermiculatus) fish species information

Scientific Name
Esox americanus vermiculatus

Common Name
Grass pickerel

Biology
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, ru

Classification

Classified By
Lesueur, 1846
Class
Ray-finned fishes (Actinopterygii)
Order
Pikes and Mudminnows (Esociformes)
Family
Pikes (Esocidae)

Distribution

Region
North America
Distribution
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.
Range
Unknown

Environment

Climate
Temperate
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
benthopelagic
Environment
Freshwater; benthopelagic; non-migratory
Trophic Level
3.67 s.e. 0.57 Based on food items.
Occurs in Marine / Salt water
False
Occurs in Brackish water
False
Occurs in Fresh Water
True
Occurs on Reefs
False
Is kept in Aquariums
True

Physical Size and Genetics

Maximum Length
37.6 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = No PD50 data many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: of no interest; gamefish: yes; aquarium: public aquariums
Vulnerability
Moderate vulnerability (41 of 100)
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.3)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated