Download Anguilla rostrata

Anguillidae (eels)
• Eel-like body (long,
slender)
• Terminal mouth; jaws
• Small opercle
• Small scales; smooth
skin
• Long dorsal fin
continuous with
caudal, anal fins; no
pelvic fin
• Homocercal caudal fin
Pennsylvania Fish and Boat Commission
American eel (Anguilla rostrata))
• Catadromous
Anguillidae
– Females migrate long
distances (15 years in
fresh water); males remain
near coast
• Nocturnal movements
(can move over land)
• 3 larval forms
(leptocephala, glass eels,
elvers)
• Uncommon in Iowa;
large rivers
American eel (Anguilla rostrata))
Clupeidae (herrings, shads)
• Laterally compressed
• Silvery scales
• Saw-tooth margin
(pointed scales) on
abdomen (belly)
• No lateral line
• Fins lack spines
• Caudal fin
homocercal, forked
Pennsylvania Fish and Boat Commission
gizzard shad (Dorosoma cepedianum))
• Diets primarily zoo-,
phytoplankton; gizzard
shad strain organisms
form soft sediments
• Gizzard shad an
important food web
component in lakes and
reservoirs with soft
bottoms
Clupeidae
Ohio Department of Natural Resources
gizzard shad (Dorosoma cepedianum))
Hiodontidae (mooneyes)
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Laterally compressed
Silvery color
Large eye
Part of belly
sharp/knifelike, but no
saw-tooth margin
• Lateral line present
• Fins lack spines
• Caudal fin
homocercal, forked
GLERL/NOAA
mooneye (Hiodon tergisus))
• Diet consists of small
animals, including fishes
Hiodontidae
• Sportfishes where they
are common (e.g.,
western Canada)
• Uncommon in Iowa;
present in large border
rivers
University of Alberta Department of Biology
goldeye (Hiodon alosoides))
Salmonidae (trouts)
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Terminal mouth
Small scales
Fins lack spines
Adipose fin
Axillary process at
base of pelvic fin
• Caudal fin
homocercal, squared
or forked
brook trout (Salvelinus fontinalis))
Adipose fin
Axillary process
Eddy and Underhill (1978)
• Cool/cold waters
• Prey on invertebrates,
fishes
Salmonidae
Virginia Tech virtual aquarium
• Economically important
sport/food fishes
• Brook trout native to
northeast IA; 2
nonindigenous species
propagated, stocked
(some natural
reproduction)
brook trout (Salvelinus fontinalis))
Umbridae (mudminnows)
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Terminal mouth
Lateral line absent
Fins with soft rays
Dorsal, anal fins
toward posterior end
of body
• Caudal fin
homocercal, rounded
New York State Department of Environmental Conservation
central mudminnow (Umbra limi))
University of Michigan Museum of Zoology
Umbridae
• Inhabit swamps, ponds
• Very tolerant of low
oxygen concentrations,
drought
• Bury themselves in mud
• Prey on invertebrates
University of Michigan Museum of Zoology
central mudminnow (Umbra limi)