Species Adversity
Extirpated from 99% of its range in the United States, this "King of Fish" was responsible for the 2nd largest fishery in New England in its heyday.
Atlantic Salmon (Salmo salar)
This species was introduced to North America in the 1800s by german immigrants. This species feeding habits disturb benthic sediments, reducing water.
Common Carp (Cyprinus carpio)
This crustacean - red when not cooked and even redder when cooked - is a threat to the Okavango river ecosystem in southern Africa.
Red Swamp Crayfish (Procambarus clarkii)
For anadromous species, this method of raising eggs and larval fish may provide early life stage experience adjacent to natal streams that is necessary for adult spawning migration.
Remote Site Incubators.
This is one of the largest threats to freshwater fisheries in developing countries.
Overfishing.
The largest native minnow in North America can grow to six feet in length and is threatened by habitat degradation, streamflow regulation, competition and water pollution in this southwestern river basin.
Squawfish...
Colorado River
and
Colorado pikeminnow (Ptychocheilus lucius)
Vulnerable in New Hampshire waters, this species decimated coldwater fisheries in the Great Lakes when the construction of locks and shipping canals allowed inland migration.
Sea Lamprey (Petromyzon marinus)
In 1960, this voracious predator was introduced to Lake Victoria in Africa leading the the extinction of 40% of the Lake's 500 native cichlid species.
Nile Perch (Lates niloticus)
This form of habitat restoration has occurred with some success on the West Coast in reconnecting migratory Salmonids species with upstream spawning grounds.
Dam removal.
This form of terrestrial habitat restoration, although not innately aquatic, provides bank stabilization, shading, water temperature control, and improved habitat.
Riparian reforestation.
California water withdrawal as well as pollution from agricultural herbicides and pesticides are among the causes for this fish's endangered species listing.
Delta Smelt (Hypomesus transpacificus)
One of the major sources of introduced species in the Great Lakes, this medium of introduction spread species around the world in both marine and freshwater ecosystems.
Shipping Ballast Water
In Australia, this watershed and its species are threatened by water extraction, habitat-fragmentation, and introduced species.
Murray-Darling River System, Australia
This America species is being reintroduced to the limit of its historic northern range to help control invasive carp. Biologists intend for this prehistoric beast of a fish to prey upon juvenile carp.
Alligator Gar (Atractosteus spatula)
"Imperiled" or "At Risk" are terms used to describe species that are in trouble but may not be covered by this federal act.
The Endangered Species Act
In Western Montana this species of Char is being translocated to upstream lakes to protect the remaining population from introduced species.
Bull Trout (Salvelinus confluentus)
Supported by stock enhancement in Lake Erie, this species was introduced to Yellowstone Lake 25 years ago and since then has caused a decline in the indigenous Cutthroat Trout and the species and ecosystems that rely on them.
Lake Trout (Salvelinus namaycush)
Of the 6 species of Sturgeon native to Europe's Danube River Basin, how many are considered vulnerable or endangered?
Bonus - name as many of them as you can.
Six. Beluga, Russian, Ship, Stellate, Sterlet, and European.
Efforts to reconnect these low-lying areas adjacent to rivers allow for seasonal habitat for fish.
Floodplains
An important part of any species reintroduction is drafting this document as a guideline for actions to be taken.
A Recovery Plan
This freshwater family is a large and diverse group with species such as the Common Bream, Giant Barb, and Rohtee. It is also the most imperiled freshwater group with 46% of its species considered in trouble (Jelks et al. 2018).
Cyprinidae
Sailfin, Vermiculated, and Plecos are all species of this type of catfish. Native to central and South America, these fish were likely introduced through this hobby. This potential solution to curb the invasive catfish could end in Barbecue or a spicy Gumbo.
Armored
and
Aquarist
and
Eat them!
One of Europe's most threatened riverine species is the Zingel asper or Apron. At the Besancon Natural History Museum this method of simulating winter temperatures was applied to broodstock and hatching rates.
Vernalization.
Spawning bloater chubs, a species of deepwater whitefish extirpated from Lake Ontario in the 1980's, were collected using this method in from this Great Lake for reintroduction efforts.
Trawling
and
Lake Michigan
The Desert Pupfish (Cyprinodon macularius) is a small fish species native to America's southwest. Part of its recovery plan has been this action to preserve the population in novel locations.
Conservation translocation or managed relocation.