The Moroccan-American Treaty of Peace and Friendship, sealed by Sultan Mohammed III.
A lake trout
A lake trout in spawning dress.
Fishermen drying a net and hauling lake trout; part of a 1940 mural in the Sturgeon Bay Post Office.

List of treaties to which the United States has been a party or which have had direct relevance to U.S. history.

- List of United States treaties

Commercial fishing by Ojibwe for Lake Trout in Lake Superior is permitted under various treaties and regulated by the Great Lakes Indian Fish & Wildlife Commission (GLIFWC).

- Lake trout

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Brook trout

Species of freshwater fish in the char genus Salvelinus of the salmon family Salmonidae.

Tiger trout (top 3), splake (bottom)
Brook trout from lake in Wyoming's Wind River Range
Captive brook trout in an aquarium
U.S. native and introduced ranges of brook trout (Salvelinus fontinalis)
Native Appalachian brook trout
Typical southern Appalachian brook trout habitat
Nathan Currier lithograph of Arthur Fitzwilliam Tait's painting "Catching a Trout", 1854 - depicts fishermen catching a brook trout near South Haven Church in a mill pond on Carmans River Long Island, New York. Purportedly it illustrates an occasion when Daniel Webster, an avid angler, caught a large (about 14.5 lbs) brook trout at the location in 1823 (or 1827).
Brook trout chasing an artificial fly from American Fishes (1903)
An angler pulls in a Brook trout using a Tenkara fly rod in Yosemite National Park.

The species was later moved to the char genus Salvelinus, which in North America also includes the lake trout, bull trout, Dolly Varden, and the Arctic char.

Great Bear Lake

Lake in the boreal forest of Canada.

Great Bear Lake, Northwest Territories
Bathymetric map of Great Bear Lake.
Mackenzie River drainage basin showing Great Bear Lake's position in the Western Canadian Arctic
Ruins of Fort Confidence at the mouth of the Dease River in 1911
The community of Délı̨nę on Great Bear Lake
Grizzly Bear Mountain, Great Bear Lake
Smoke from forest fires in Alaska blows over Great Bear Lake
Great Bear Lake. Note the smoke plumes from wildfires

In 1995, a 32.8 kg lake trout was caught, the largest ever caught anywhere by angling.

Salvelinus

Genus of salmonid fish often called char or charr; some species are called "trout".

Salvelinus killinensis, Scotland
Salvelinus alpinus, Salvelinus colii and Salvelinus grayi, Irish taxa
Whitespotted char, Salvelinus leucomaenis
Brook trout, Salvelinus fontinalis
Dolly Varden trout, Salvelinus malma
Lake trout, Salvelinus namaycush

Many members of this genus are popular sport fish, and a few, such as lake trout (S. namaycush) and arctic char (S. alpinus) are objects of commercial fisheries and/or aquaculture.

Sea lamprey

Parasitic lamprey native to the Northern Hemisphere.

Two sea lamprey preying on a brown trout.
Mouth of a sea lamprey, Petromyzon marinus

However, in the Great Lakes, the sea lamprey attacks native fish such as lake trout, lake whitefish, chub, and lake herring, which historically did not face sea lampreys.

Lake Superior

Largest of the Great Lakes of North America, and among freshwater lakes, it is the world's largest by surface area and the third-largest by volume.

Lake Superior taken by the Terra-MODIS satellite on May 7, 2022
Lake Superior deepest point on the bathymetric map.
Lake Superior basin
A frozen Duluth Harbor Entrance
Lake Superior, by Walter Shirlaw
Geological map of North America showing cratons and basement rocks. The Midcontinent Rift is in white, here labeled Keweenawan Rift. Lake Superior occupies the apex of the rift; the section to its north marked "SUPERIOR" is the Superior Craton
Basaltic columns along Lake Superior
Historical map of Lake Superior and Northern Michigan, published 1879 by Rand McNally
Pictographs at Lake Superior Provincial Park, Ontario
Reconstructed Great Hall, Grand Portage National Monument, Minnesota
"Ice blockade in Marquette Harbor, June 1873", stereoscopic photo
Bedrock shoreline, Neys Provincial Park, Ontario
Pictured Rocks National Lakeshore, Michigan

Species native to the lake include banded killifish, bloater, brook trout, burbot, cisco, lake sturgeon, lake trout, lake whitefish, longnose sucker, muskellunge, northern pike, pumpkinseed, rock bass, round whitefish, smallmouth bass, walleye, white sucker and yellow perch.

Yellowstone Lake

Largest body of water in Yellowstone National Park.

Yellowstone Lake as seen from space
An original map of Yellowstone Lake from the Washburn, Doane, and Langford Expedition of 1870
A July 28, 1871 photo of Annie, the boat used by the Hayden Geological Survey of 1871
Panorama of the West Thumb area of Yellowstone Lake in 2018
An 1897 photo of anglers at West Thumb Geyser Basin on the western shore of Yellowstone Lake

Non-native lake trout were discovered in Yellowstone Lake in 1994, and were believed to have been either accidentally or intentionally introduced as early as 1989 with fish taken from Lewis Lake.

Splake

The splake or slake (Salvelinus namaycush x Salvelinus fontinalis) is a hybrid of two fish species resulting from the crossing of a male brook trout (Salvelinus fontinalis) and a female lake trout (Salvelinus namaycush).

Great Lakes

The Great Lakes, also called the Great Lakes of North America or the Laurentian Great Lakes, are a series of large interconnected freshwater lakes with certain sea-like characteristics in the mid-east region of North America that connect to the Atlantic Ocean via the Saint Lawrence River.

Satellite image of the Great Lakes, April 24, 2000
Terra MODIS image of the Great Lakes, January 27, 2005, showing ice beginning to build up around the shores of each of the lakes, with snow on the ground; Green Bay, the North Channel, Saginaw Bay, and Lake St. Clair show complete ice coverage.
Location in North America
A map of the Great Lakes Basin showing the five sub-basins. Left to right they are: Superior (magenta); Michigan (cyan); Huron (green); Erie (yellow); Ontario (orange-red).
Lake Michigan–Huron with north oriented to the right; taken on April 14, 2022 during Expedition 67 of the International Space Station. Green Bay is at the upper left and Saginaw Bay is on the right.
South Bass Island in Lake Erie
Toronto on Lake Ontario is in the eastern section of the Great Lakes Megalopolis
Water levels of Lakes Michigan and Huron in the United States, 1918 to 2019.
The Great Lakes, as photographed from the International Space Station
A diagram of the formation of the Great Lakes
Map of Glacial Lake Algonquin and its Correlatives (USGS 1915)
The location of common lake effect bands on the Great Lakes
Lake sturgeon, the largest native fish in the Great Lakes and the subject of extensive commercial fishing in the 19th and 20th centuries is listed as a threatened species
Cliffs at Palisade Head on Lake Superior in Minnesota near Silver Bay.
A zebra mussel–encrusted vector-averaging current meter from Lake Michigan.
Diatoms of different sizes seen through the microscope. These minuscule phytoplankton are encased within a silicate cell wall.
A woodcut of Le Griffon
The passenger ship (foreground) leaving Chicago, c. 1909
Photograph of Lakes Ontario, Erie and Huron plus the Finger Lakes of upstate New York, June 14, 2012, taken aboard the International Space Station, with lake names added
Escanaba's Ludington Park in Michigan
Various national, state, provincial, and municipal jurisdictions govern the Great Lakes
Satellite image of the Great Lakes taken by the Terra satellite on June 16, 2021

By the mid-1950s, the lake trout populations of Lakes Michigan and Huron were reduced, with the lamprey deemed largely to blame.

Invasive species

Introduced organism that becomes overpopulated and harms its new environment.

Beavers from North America constitute an invasive species in Tierra del Fuego, where they have a substantial impact on landscape and local ecology through their dams.
Kudzu, a Japanese vine species invasive in the southeast United States, growing in Atlanta, Georgia
Vinca spreading in a garden
The brown tree snake (Boiga irregularis)
Lantana growing in abandoned citrus plantation; Moshav Sdei Hemed, Israel
Chinese mitten crab (Eriocheir sinensis)
Cargo ship de-ballasting
An American alligator attacking a Burmese python in Florida; the Burmese python is an invasive species which is posing a threat to many indigenous species, including the alligator
Alien invasive species Parthenium hysterophorus smothering native flora in Achanakmar Tiger Reserve, Bilaspur, Chhattisgarh, India

Sea lampreys prey on all types of large fish such as lake trout and salmon.

Yellowstone National Park

American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho.

Detailed pictorial map from 1904
Ferdinand V. Hayden (1829–1887), American geologist who convinced Congress to make Yellowstone a national park in 1872
Ferdinand V. Hayden's map of Yellowstone National Park, 1871
Portrait of Nathaniel P. Langford (1870), the first superintendent of the park
Great Falls of the Yellowstone, U.S. Geological and Geographic Survey of the Territories (1874–1879), photographer William Henry Jackson
Fort Yellowstone (circa 1910), formerly a U.S. Army post, now serves as park headquarters.
Superintendent Horace M. Albright and black bears (1922). Tourists often fed black bears in the park's early years, with 527 injuries reported from 1931 to 1939.
The Roosevelt Arch in Gardiner, Montana, at the north entrance
Pictorial map by Heinrich C. Berann (1991); scale exaggerated
Official park map c. undefined 2006 (click on map to enlarge)
Satellite image of Yellowstone National Park in 2020
Columnar basalt near Tower Fall; large floods of basalt and other lava types preceded mega-eruptions of superheated ash and pumice.
Boardwalks allow visitors to safely approach the thermal features, such as Grand Prismatic Spring.
Infrastructure damage at Hebgen Lake due to the 7.2 magnitude earthquake of 1959
Meadow in Yellowstone National Park
Yellowstone sand verbena are endemic to Yellowstone's lakeshores.
American bison
Elk mother nursing her calf
A reintroduced wolf in Yellowstone National Park
Black bear and cub near Tower Fall
Elk in Hayden Valley
Pronghorn are commonly found on the grasslands in the park.
Fire in Yellowstone National Park
Wildfire in Yellowstone National Park produces a pyrocumulus cloud.
A crown fire approaches the Old Faithful complex on September 7, 1988.
Winter scene in Yellowstone
Geyser at Yellowstone Lake
Union Pacific Railroad brochure promoting travel to the park (1921)
Tourists watch Old Faithful erupt, 2019.
Vintage photo of human-habituated bears seeking food from visitors
Idaho portion of park highlighted in southwest corner (click to enlarge)

The Yellowstone cutthroat trout has faced several threats since the 1980s, including the suspected illegal introduction into Yellowstone Lake of lake trout, an invasive species which consume the smaller cutthroat trout.