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Brook trout

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Brook trout
Eastern brook trout

Secure  (NatureServe)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Salvelinus
Subgenus: Baione
Species:
S. fontinalis
Binomial name
Salvelinus fontinalis
(Mitchill, 1814) 
Subspecies

S. f. agassizii (Garman, 1885)
S. f. timagamiensis Henn & Rinckenbach, 1925

Synonyms[2]
previous scientific names
  • Salmo fontinalis Mitchill, 1814 Baione fontinalis (Mitchill, 1814) Salmo canadensis Griffith & Smith, 1834 Salmo hudsonicus Suckley, 1861 Salvelinus timagamiensis Henn & Rinckenbach, 1925

The brook trout (Salvelinus fontinalis) is a species of freshwater fish in the char genus Salvelinus of the salmon family Salmonidae native to Eastern North America in the United States and Canada.[3][4] Two ecological forms of brook trout have been recognized by the US Forest Service.[3] One ecological form is short-lived potamodromous populations in Lake Superior known as coaster trout or coasters. The second ecological form is the long-living predaceous anadromous populations which are found in northern lakes and coastal rivers from Long Island to Hudson Bay, which are referred to as salters.[5] In parts of its range, it is also known as the eastern brook trout, speckled trout, brook char (or charr), squaretail, brookie, or mud trout, among others.[6] Adult coaster brook trout are capable of reaching sizes over 2 feet in length and weigh up to 6.8 kg (15 lb), whereas adult salters average between 6 and 15 inches in length and weigh between 0.5 and 2.3 kg (1 and 5 lb).[7] The brook trout is characterized by its distinctive olive-green body with yellow and blue-rimmed red spots, white and black edged orange fins, and dorsal vermiculation.[8] The diet of the brook trout is restrictive to the season and location of the fish, but will typically consist of terrestrial and aquatic insects, fry, crustaceans, zooplankton, and worms.[3]

Throughout history, non-native brook trout have been transplanted beyond its native borders, where it has spread across North America and much of the world.[3] These brook trout have been introduced since the 1800s by means of artificial propagation and aquaculture in hope of promoting fishery resources.[9] Through this transplantation, brook trout have been observed to affect native populations by outcompeting, preying upon, and hybridizing with many native aquatic species.[10][11] This invasive nature via human-mediated introductory has led to their classification in the list of the top 100 globally invasive species.[12]

Since the 19th century, isolated native eastern brook trout populations have faced extirpation due to stream pollution, habitat destruction, invasive species, and waterway damming.[13] Although facing these pressures, the brook trout is not listed as an endangered species by the International Union for Conservation of Nature, but native population decline has been observed.[14] Some local subspecies of brook trout, such as the aurora trout, are listed as endangered by the Committee on the Status of Endangered Wildlife in Canada.[15]

Taxonomy

[edit]

The scientific name of the brook trout is Salvelinus fontinalis.[11] Initially, the brook trout was scientifically described as Salmo fontinalis by the naturalist Samuel Latham Mitchill in 1814.[16] 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.[17][16] The specific epithet "fontinalis" comes from the Latin for "of a spring or fountain", in reference to the clear, cold streams and ponds in its native habitat.[18][3]

Subspecies

[edit]

There is little recognized systematic substructure in the brook trout, but the two subspecies have been proposed. The aurora trout (S. f. timagamiensis) is a subspecies native to two lakes in the Temagami District of Ontario, Canada.[19] The silver trout (S. agassizii or S. f. agassizii) is an extinct trout species or subspecies last seen in Dublin Pond, New Hampshire, in 1930.[20] It is considered by fisheries biologist Robert J. Behnke as a highly specialized form of brook trout.[21]

Hybrids

[edit]
Photo of four trout lying in grass
Tiger trout (top three), splake (bottom)

The brook trout produces hybrids both with its congeners the lake trout (S. namaycush) and the Arctic char (S. alpinus), and intergeneric hybrids with the brown trout (Salmo trutta).[22]

The splake is an intrageneric hybrid between the brook trout and lake trout (S. namaycush). Although uncommon in nature, they are artificially propagated in substantial numbers for stocking into brook trout or lake trout habitats.[23] Although they are fertile, back-crossing in nature is behaviorally problematic and very little natural reproduction occurs. Splake grow more quickly than brook trout, become piscivorous sooner, and are more tolerant of competitors than brook trout.[24]

The tiger trout is an intergeneric hybrid between the brook trout and the brown trout. Tiger trout rarely occur naturally but are sometimes artificially propagated. Such crosses are almost always reproductively sterile. They are popular with many fish-stocking programs because they can grow quickly, and may help keep coarse fish (wild non "sport" fish) populations in check due to their highly piscivorous (fish-eating) nature.[25]

The sparctic char is an intrageneric hybrid between the brook trout and the Arctic char.[26]

Ecological forms

[edit]

The US Forest Service has recognized two ecological forms of brook trout, salters and coasters. The forms express the same general features but vary in size, behavior, and location.[3]

Coasters

[edit]

A potamodromous population of brook trout native to lacustrine regions, which migrate into tributary rivers to spawn, are called "coasters".[27] Coasters tend to be larger than most other populations of brook trout, often reaching 6 to 7 lb (2.7 to 3.2 kg) in size.[28] They also commonly live for longer periods of time and exhibit more predacious behavior than their counterparts.[29] Many coaster populations have been severely reduced by overfishing and habitat loss by the construction of hydroelectric power dams on Lake Superior tributaries. In Ontario, Michigan, and Minnesota efforts are underway to restore and recover coaster populations.[30][31]

Salters

[edit]

When Europeans first settled in Eastern North America, semi-anadromous or sea-run brook trout, commonly called "salters", ranged from southern New Jersey, north throughout the Canadian maritime provinces, and west to Hudson Bay. Salters are a short-lived form of brook trout that inhabit smaller bodies of water and exhibit less predacious behavior than coasters.[3] They may spend up to three months at sea feeding on crustaceans, fish, and marine worms in the spring. During this time they won't stray more than a few miles from the river mouth, but then return to freshwater tributaries to spawn in the late summer or autumn. While in saltwater, salters gain a more silvery color, losing much of the distinctive markings seen in freshwater. However, within two weeks of returning to freshwater, they assume typical brook trout color and markings.[28] Salters have faced threats such as habitat destruction, water pollution, and water way damming that have led to their declining population numbers across the Northeastern United States.[32]

Description

[edit]
Photo of hand holding a trout
Brook trout from lake in Wyoming's Wind River Range
Photo of a trout in an aquarium
Captive brook trout in an aquarium

The brook trout has a dark green to brown color, with a distinctive marbled pattern (called vermiculation) of lighter shades across the flanks and back and extending at least to the dorsal fin, and often to the tail. A distinctive sprinkling of red dots, surrounded by blue halos, occurs along the flanks. The belly and lower fins are reddish in color, the latter with white leading edges. Often, the belly, particularly of the males, becomes very red or orange when the fish are spawning.[8][3] Typical lengths of the brook trout vary from 25 to 65 cm (9.8 to 25.6 in), and weights from 0.3 to 3 kg (0.66 to 6.61 lb). The maximum recorded length is 86 cm (34 in) and maximum weight 6.6 kg (15 lb). Brook trout can reach at least seven years of age, with reports of 15-year-old specimens observed in California habitats to which the species has been introduced. Growth rates are dependent on season, age, water and ambient air temperatures, and flow rates. In general, flow rates affect the rate of change in the relationship between temperature and growth rate. For example, in spring, growth increased with temperature at a faster rate with high flow rates than with low flow rates.[33]

Range and habitat

[edit]
Map of native and non-native range of brook trout in U.S.
U.S. native and introduced ranges of brook trout (Salvelinus fontinalis)[34]
Hand holding small trout
Native Appalachian brook trout

Brook trout are native to a wide area of Eastern North America, but are increasingly confined to higher elevations southward in the Appalachian Mountains to northern Georgia and northwest South Carolina, Canada from the Hudson Bay basin east, the Great LakesSaint Lawrence system, the Canadian maritime provinces, and the upper Mississippi River drainage as far west as eastern Iowa.[35] Their southern historic native range has been drastically reduced, with fish being restricted to higher-elevation, remote streams due to habitat loss and introductions of brown and rainbow trout. As early as 1850, the brook trout's range started to extend west from its native range through introductions. The brook trout was eventually introduced into suitable habitats throughout the western U.S. during the late 19th and early 20th centuries at the behest of the American Acclimatization Society and by private, state, and federal fisheries authorities.[36] Acclimatization movements in Europe, South America, and Oceania resulted in brook trout introductions throughout Europe,[26] in Argentina,[37] and New Zealand.[38] Although not all introductions were successful, a great many established wild, self-sustaining populations of brook trout in non-native waters.

Habitat

[edit]
Photo of tree-covered stream in the mountains
Typical southern Appalachian brook trout habitat

The brook trout inhabits large and small lakes, rivers, streams, creeks, and spring ponds in cold temperate climates with mild precipitation.[39] Clear spring water with adequate cover and moderate flow rates is indicative of strong habitability for Brook trout. They exhibit high levels of adaptability when exposed to habitat changes from environmental effects, and have been observed to exhibit more resilience to habitat change than other Salvelinus species.[39] The typical pH range of brook trout waters is 5.0 to 7.5, with pH extremes of 3.5 to 9.8 possible.[40] Water temperatures typically range from 34 to 72 °F (1 to 22 °C). Warm summer temperatures and low flow rates are stressful on brook trout populations—especially larger fish.[41]

Ecology and reproduction

[edit]

Diet

[edit]

Brook trout have a diverse diet that includes larval, pupal, adult forms of aquatic insects (typically caddisflies, stoneflies, mayflies, and aquatic dipterans), adult forms of terrestrial insects (typically ants, beetles, grasshoppers, and crickets) that fall into the water, crustaceans, frogs and other amphibians, molluscs, smaller fish, invertebrates, and even small aquatic mammals such as voles and sometimes other young brook trout.[39]

Reproduction

[edit]

The female constructs a depression in a location in the stream bed, sometimes referred to as a "redd", where groundwater percolates upward through the gravel. One or more males approach the female, fertilizing the eggs as the female expresses them. Most spawning involve peripheral males, which directly influences the number of eggs that survive into adulthood. In general, the larger the number of peripheral males present, the more likely the eggs will be cannibalized.[42] The eggs are slightly denser than water. The female then buries the eggs in a small gravel mound where they hatch in 4 to 6 weeks.[43]

Life cycle

[edit]

Following the deposition of up to 5,000 eggs in gravel beds by the female brook trout, the eggs enter an incubation period from the winter months to early spring.[44] During this incubation period, the eggs source oxygen from the stream that passes through the gravel beds and into their gel-like shells.[45] The eggs will then successively hatch into miniature fry that rely upon their yolk sac for nutrients to compensate for the lack of nutrients provided by the parental trout during the early stages of development. In the ensuing stage of their life cycle, the fry will seek cover from predatory species in rock crevices and inlets.[44] During this period of hiding, the trout will begin to mature into fingerlings by summer and start expressing parr marks to aid in camouflage.[46] At this point, most brook trout will be between 2 and 3 inches in length.[46] Finally, in succeeding months, the trout will fully mature into a trout that is approximately between 10 and 34 inches long and capable of spawning in the fall months.[8] These fully developed adult brook trout will express a vibrant olive-green back, cherry red underbelly, black accented fins, and wavy dorsal patterns.[47] A typical adult brook trout will live to the age of 3 to 4 years old, with occasional brooks living to over the age of 4.[48]

Brook trout eggs after the spawning of a female
Brook trout fingerling with visible parr marks
Typical adult brook trout

Angling

[edit]

The brook trout is a popular game fish with anglers, particularly fly fishermen.[49]

Old colored print of three men fishing from a boat
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 in Long Island, New York. Purportedly it illustrates an occasion when Daniel Webster, an avid angler, caught a large (about 14.5 lb (6.6 kg)) brook trout at the location in 1823 (or 1827).[50]
Colored drawing of trout jumping for a fly
Brook trout chasing an artificial fly from American Fishes (1903)[51]

Until it was displaced by introduced brown trout (1883) and rainbow trout (1875), the brook trout attracted the most attention of anglers from colonial times through the first 100 years of U.S. history. Sporting writers such as Genio Scott Fishing in American Waters (1869), Thaddeus Norris American Anglers Book (1864), Robert Barnwell Roosevelt Game Fish of North America (1864) and Charles Hallock The Fishing Tourist (1873) produced guides to the best-known brook trout waters in America.[52] As brook trout populations declined in the mid-19th century near urban areas, anglers flocked to the Adirondacks in upstate New York and the Rangeley lakes region in Maine to pursue brook trout.[52] In July 1916 on the Nipigon River in northern Ontario, an Ontario physician, John W. Cook, caught a 14.5 lb (6.6 kg) brook trout, which stands as the world record.[53] Today, many anglers practice catch-and-release tactics to preserve remaining populations. Organizations such as Trout Unlimited have been at the forefront of efforts to institute air and water quality standards sufficient to protect the brook trout. Revenues derived from the sale of fishing licenses have been used to restore many sections of creeks and streams to brook trout habitat.[54]

An angler pulls in a Brook trout using a Tenkara fly rod in Yosemite National Park.

Record

[edit]

The current world angling record brook trout was caught by Dr. W. J. Cook on the Nipigon River, Ontario, in July 1915. The 31 in (79 cm) trout weighed only 14.5 lb (6.6 kg) because, at the time of weighing, it was badly decomposed after 21 days in the bush without refrigeration.[55] A 29 in (74 cm) brook trout, caught in October 2006 in Manitoba, is not eligible for record status since it was released alive.[56] This trout weighed about 15.98 lb (7.25 kg) based on the accepted formula for calculating weight by measurements, and it currently stands as the record brook trout for Manitoba.[57]

Artificial propagation and aquaculture

[edit]
Juvenile brook trout grown in a rearing tank by the fish and wildlife services

Since the 1800s, brook trout populations have been grown by artificial propagation and aquaculture.[9] Artificial propagation in fish is the process by which eggs are inseminated, hatched, and grown in a controlled environment that minimizes unfavorable environmental pressures. The fish are then released into the wild when they have reached the appropriate age and size.[58][59] This process was introduced as a way to counteract the effects of overfishing and aquatic habitat loss and to reinforce brook trout populations across the Northeastern United States.[60] Hatchery rearing was also introduced to raise brook trout in large numbers for food production and sale for human consumption.[61]

The process of artificial propagation in brook trout begins by decreasing the temperature of the adult trout's propagation tank to mimic the seasonal changes associated with brook trout spawning season. The acclimated trout are then collected, and the eggs are gently massaged out of the female trout into a collection vessel, and then inseminated with the milt of a male brook. Next, the inseminated eggs are strained of the milt and transferred to a jar for several weeks to develop into viable embryos. Once the eggs have begun to hatch, the fry are transported into rearing tanks where they will grow and develop before their release into the wild.[62] Their rearing tanks typically consist of large circular tanks with a constant water flow going through them to allow a current to circulate through the tank and keep it clean (some more elaborate systems operate on a re-circulation system where the water is filtered and reused). The fish are typically fed a pelleted food consisting of 40–50% protein and 15% fat made from fish oil, animal protein, plant protein and vitamins and minerals.[63][64] Finally, once the fish have reached a viable size, around 2 inches in length, they are released into the wild.[62]

This means of brook trout aquaculture has sparked controversy due to potential decrease in the fishes fitness, adaptability, and environmental resilience, effectively posing a threat to native brook trout populations.[60] Arguments against artificial propagation of brook trout claim that it can cause a degradation of the overall genetic pool due to the possibility of inbreeding among individuals. This lack of genetic variation could lead to certain populations of brook trout to become extirpated from their deficiency in adaptability.[9][60]

Conservation status

[edit]

As early as the late 19th century, native brook trout in North America became extirpated from many watercourses as land development, forest clear-cutting, and industrialization took hold.[65] Streams and creeks that were polluted, dammed, or silted up often became too warm to hold native brook trout, and were colonized by transplanted smallmouth bass and perch or other introduced salmonids such as brown and rainbow trout. The brown trout, a species not native to North America, has replaced the brook trout in much of the brook trout's native water. If already stressed by overharvesting or by temperature, brook trout populations are very susceptible to damage by the introduction of exogenous species. Many lacustrine populations of brook trout have been extirpated by the introduction of other species, particularly percids, but sometimes other spiny-rayed fishes.[66]

In addition to chemical pollution and algae growth caused by runoff containing chemicals and fertilizers, air pollution has also been a significant factor in the disappearance of brook trout from their native habitats. In the U.S., acid rain caused by air pollution has resulted in pH levels too low to sustain brook trout in all but the highest headwaters of some Appalachian streams and creeks.[67] Brook trout populations across large parts of eastern Canada have been similarly challenged; a subspecies known as the aurora trout was extirpated from the wild by the effects of acid rain.[68]

Organizations such as Trout Unlimited and Trout Unlimited Canada are partnering with other organizations such as the Southern Appalachian Brook Trout Foundation, the Eastern Brook Trout Joint Venture, and state, provincial, and federal agencies to undertake projects that restore native brook trout habitat and populations.[14][30][69][70]

As an invasive species

[edit]

Although brook trout populations are under stress in their native range, they are considered an invasive species where they have been introduced outside their historic native range.[71][72][73] In the northern Rocky Mountains, non-native brook trout are considered a significant contributor to the decline or extirpation of native cutthroat trout (Oncorhynchus clarki) in headwater streams.[74][75] Invasive brook trout populations may provoke territorial competition with the native cutthroat trout that can impede the recovery efforts of cutthroat trout by environmental agencies.[75] Non-native brook trout populations have been subject to eradication programs in efforts to preserve native species.[76][77] In Yellowstone National Park, anglers may take an unlimited number of non-native brook trout in some watersheds. In the Lamar River watershed, a mandatory kill regulation for any brook trout caught is in effect.[78] In Europe, introduced brook trout, once established, have had negative impacts on growth rates of native brown trout (S. trutta).[26]

References

[edit]
  1. ^ [1], NatureServe Explorer
  2. ^ "Synonyms of Salvelinus fontinalis (Mitchill, 1814)". Fishbase. Retrieved 2014-02-23.
  3. ^ a b c d e f g h Adams, Pauline; James, Christopher; Speas, Clay (March 2008). "Brook trout (Salvelinus fontinalis) Species and Conservation Assessment" (PDF). US Forest Service.
  4. ^ "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 2024-03-22.
  5. ^ "History". Sea-Run Brook Trout Coalition. Sea Run Brook Trout Coalition. Retrieved 19 February 2024.
  6. ^ Common names of Salvelinus fontinalis FishBase, retrieved 22 May 2015
  7. ^ "Brook Trout (Salvelinus fontinalis) | U.S. Fish & Wildlife Service". www.fws.gov. Retrieved 2024-03-22.
  8. ^ a b c "Brook Trout | Species Breakdown". HookedinFishing. Retrieved 2024-03-08.
  9. ^ a b c Kazyak, David C.; Rash, Jacob; Lubinski, Barbara A.; King, Tim L. (2018-02-01). "Assessing the impact of stocking northern-origin hatchery brook trout on the genetics of wild populations in North Carolina". Conservation Genetics. 19 (1): 207–219. Bibcode:2018ConG...19..207K. doi:10.1007/s10592-017-1037-4. ISSN 1572-9737.
  10. ^ Harbicht, Andrew B; Alshamlih, Mohammed; Wilson, Chris C; Dylan J, Fraser (May 2014). "Anthropogenic and habitat correlates of hybridization between hatchery and wild brook trout". Canadian Journal of Fisheries and Aquatic Sciences. 71 (5): 688–697. doi:10.1139/cjfas-2013-0460.
  11. ^ a b Day, Casey C; Landguth, Erin L; Bearlin, Andrew; Zachary A, Holden; Whiteley, Andrew R (May 2018). "Using simulation modeling to inform management of invasive species: A case study of eastern brook trout suppression and eradication". Biological Conservation. 221: 10–22. Bibcode:2018BCons.221...10D. doi:10.1016/j.biocon.2018.01.017.
  12. ^ "100 of the World's Worst Invasive Alien Species: A Selection From The Global Invasive Species Database", Encyclopedia of Biological Invasions, University of California Press, 2019-12-31, pp. 715–716, doi:10.1525/9780520948433-159, ISBN 978-0-520-94843-3, retrieved 2024-03-22
  13. ^ "Eastern Brook Trout: Status and Threats (2006) — EBTJV". easternbrooktrout.org. Retrieved 2024-03-22.
  14. ^ a b "Conserving the Eastern Brook Trout: An Overview of Status, Threats, and Trends" (PDF). dep.nj.gov. December 2005. Retrieved 2024-03-22.
  15. ^ Government of Canada, Public Services and Procurement Canada. "Information archivée dans le Web" (PDF). publications.gc.ca. Retrieved 2024-03-22.
  16. ^ a b Skip (2020-12-17). "Introducing The First Fish: Bob Mallard on Salmo fontinalis; brook trout". Fly Life Magazine. Retrieved 2024-03-23.
  17. ^ Whiteley, Andrew R; Penaluna E, Brooke; Taylor, Eric B; Weiss, Steve; Abadia-Cardoso, Alicia; Gomez-Uchida, Daniel; Koizumi, Itsuro; Trotter, Patrick (2019). "Trout and Char: Taxonomy, Systematics, and Phylogeography". ResearchGate.
  18. ^ DCNR (2018-08-24). "Wild About Native Trout!". Good Natured. Retrieved 2024-03-23.
  19. ^ Aurora trout Recovery Team (ATRT) (July 2006). "Recovery Strategy for the Aurora trout (Salvelinus fontinalis timagamiensis) in Canada" (PDF). Fisheries and Oceans Canada. Archived from the original (PDF) on 2012-03-04. Retrieved 2014-01-06.
  20. ^ World Conservation Monitoring Centre (1996). "Salvelinus agassizii". IUCN Red List of Threatened Species. 1996: e.T19873A9089084. doi:10.2305/IUCN.UK.1996.RLTS.T19873A9089084.en. Retrieved 13 November 2021.
  21. ^ Behnke, Robert J. (2002). "Brook Trout Salvelinus fontinalis". Trout and Salmon of North America. Tomelleri, Joseph R. (illustrator). The Free Press. pp. 275–280. ISBN 0-7432-2220-2.
  22. ^ Dunham, Rex (2004). Aquaculture and Fisheries Biotechnology: Genetic Approaches. Wallingford: CABI Publishing. p. 42. ISBN 0851999530.
  23. ^ "Splake". Maine Department of Inland Fisheries. Retrieved 2013-01-06.
  24. ^ "NAS - Nonindigenous Aquatic Species Salvelinus fontinalis x namaycush". U.S. Geological Survey. Retrieved 2014-01-06.
  25. ^ "Tiger trout". UtahFishingInfo.com - Utah Fishing Information. Retrieved 2014-05-28.
  26. ^ a b c Jannson, K. (2013). "NOBANIS – Invasive Alien Species Fact Sheet Salvelinus fontinalis" (PDF). Online Database of the European Network on Invasive Alien Species – NOBANIS www.nobanis.org. Archived from the original (PDF) on 2011-09-11. Retrieved 2013-12-26.
  27. ^ "A Completion Report on the Lake Superior Coaster Brook Trout Initiative" (PDF). Great Lakes Fishery Commission. Archived from the original (PDF) on 2015-04-27. Retrieved 2013-12-27.
  28. ^ a b Karas, Nick (2002). "Salters and Coasters". Brook Trout: A Thorough Look at North America's Great Native Trout- Its History, Biology, and Angling Possibilities (Revised ed.). NY: Lyons Press. pp. 100–119. ISBN 978-1-58574-733-7.
  29. ^ Adams, Pauline; James, Christopher; Speas, Clay (March 2008). "Brook trout (Salvelinus fontinalis) Species and Conservation Assessment" (PDF). US Forest Service.
  30. ^ a b "Coaster Brook Trout". Trout Unlimited Canada. Archived from the original on 2014-05-29. Retrieved 2014-05-28.
  31. ^ Mamoozadeh, N.; Goldsworthy, C.; Miller, L.; Peterson, M.; Meek, M. (August 2023). "Sources of coaster brook trout (Salvelinus fontinalis) revealed by genomic analysis of brook trout populations along Minnesota's shoreline with Lake Superior". Journal of Great Lakes Research. 49 (4): 901–917. Bibcode:2023JGLR...49..901M. doi:10.1016/j.jglr.2023.06.005.
  32. ^ Luell, Steven (August 21, 2020). "Movements of coastal brook trout after dam removals". The Habitat Section of the American Fisheries Society.
  33. ^ Xu, Calin; Letcher, Benjamin H.; Nislow, Keith H. (Nov 2010). "Context-specific influence of water temperature on brook trout growth rates in the field". Freshwater Biology. 55 (11): 2253–2264. Bibcode:2010FrBio..55.2253X. doi:10.1111/j.1365-2427.2010.02430.x.
  34. ^ "NAS - Nonindigenous Aquatic Species Salvelinus fontinalis". U.S. Geological Survey. Retrieved 2014-01-06.
  35. ^ Behnke, Robert J. (2007). "Brook Trout". About Trout-The Best of Robert J. Behnke from Trout Magazine. Guilford, CT: The Lyons Press. pp. 85–90. ISBN 978-1-59921-203-6.
  36. ^ Karas, Nick (2002). "Expansion of the Brook Trout's Range Within the United States". Brook Trout: A Thorough Look at North America's Great Native Trout- Its History, Biology, and Angling Possibilities (Revised ed.). NY: Lyons Press. pp. 331–339. ISBN 978-1-58574-733-7.
  37. ^ "Salvelinus fontinalis Aurora trout". animaldiversity.ummz.umich.edu. Retrieved 2013-12-26.
  38. ^ "Brook Char or Brook Trout". fishingmag.co.nz. Retrieved 2013-12-26.
  39. ^ a b c Raleigh, Robert F (September 1982). Habitat Suitability Index Models: Brook Trout. Fort Collins, CO: U.S. Department of the Interior, Fish and Wildlife Services.
  40. ^ "Brook Trout (Salvelinus fontinalis)". Chebucto.ns.ca. Archived from the original on 2013-12-14. Retrieved 2013-07-10.
  41. ^ Xu, C.L.; Letcher, B. H.; Nislow, K. H. (June 2010). "Size-dependent survival of brook trout Salvelinus fontinalis in summer: effects of water temperature and stream flow". Journal of Fish Biology. 76 (10): 2342–2369. Bibcode:2010JFBio..76.2342X. doi:10.1111/j.1095-8649.2010.02619.x. PMID 20557596.
  42. ^ Blanchfield, Paul; Ridgway, Mark S. (Mar 1999). "The cost of peripheral males in a brook trout mating system". Animal Behaviour. 57 (3): 537–544. doi:10.1006/anbe.1998.1014. PMID 10196043. S2CID 25654976.
  43. ^ "Trout in the Classroom". www.dnr.sc.gov. Retrieved 2024-03-24.
  44. ^ a b "Biology & Management" (PDF). Maine.gov.
  45. ^ Harter, Till (February 12, 2021). "Warm fish eggs gasp for oxygen". journals.biologists.com. Retrieved 2024-03-08.
  46. ^ a b "Brook Trout". PENNSYLVANIA TROUT IN THE CLASSROOM. Retrieved 2024-03-08.
  47. ^ Letcher, Benjamin H.; Schueller, Paul; Bassar, Ronald D.; Nislow, Keith H.; Coombs, Jason A.; Sakrejda, Krzysztof; Morrissey, Michael; Sigourney, Douglas B.; Whiteley, Andrew R.; O'Donnell, Matthew J.; Dubreuil, Todd L. (2015). "Robust estimates of environmental effects on population vital rates: an integrated capture—recapture model of seasonal brook trout growth, survival and movement in a stream network". Journal of Animal Ecology. 84 (2): 337–352. Bibcode:2015JAnEc..84..337L. doi:10.1111/1365-2656.12308. ISSN 0021-8790. JSTOR 24698503. PMID 25327608.
  48. ^ Letcher, Benjamin H.; Schueller, Paul; Bassar, Ronald D.; Nislow, Keith H.; Coombs, Jason A.; Sakrejda, Krzysztof; Morrissey, Michael; Sigourney, Douglas B.; Whiteley, Andrew R.; O'Donnell, Matthew J.; Dubreuil, Todd L. (March 2015). Childs, Dylan (ed.). "Robust estimates of environmental effects on population vital rates: an integrated capture–recapture model of seasonal brook trout growth, survival and movement in a stream network". Journal of Animal Ecology. 84 (2): 337–352. Bibcode:2015JAnEc..84..337L. doi:10.1111/1365-2656.12308. ISSN 0021-8790. PMID 25327608.
  49. ^ O'Hara, David L.; Dickerson, Matthew T. (2014). Downstream: Reflections on Brook Trout, Fly Fishing, and the Waters of Appalachia. Eugene, OR: Cascade Books. ISBN 978-1-62564-727-6.
  50. ^ Karas, Nick (2002). "Daniel Webster and his "Devil Trout"". Brook Trout: A Thorough Look at North America's Great Native Trout- Its History, Biology, and Angling Possibilities (Revised ed.). NY: Lyons Press. pp. 3–14. ISBN 978-1-58574-733-7.
  51. ^ Gill, Theodore; Goode, G. Brown (1903). American Fishes-A Popular Treatise upon the Game and Food Fishes of North America. Boston: L. C. Page and Company.
  52. ^ a b Schullery, Paul (1996). "The Fly-fishing Exploration". American Fly Fishing-A History. Norwalk, CT: The Easton Press. pp. 43–57.
  53. ^ Karas, Nick (2002). "Dr. John William Cook and his "Devil Trout"". Brook Trout: A Thorough Look at North America's Great Native Trout- Its History, Biology, and Angling Possibilities (Revised ed.). NY: Lyons Press. pp. 15–26. ISBN 978-1-58574-733-7.
  54. ^ Moeller, Scott (August 2009). "Species Profile-Closeup on the Brook Trout". Minnesota Department of Natural Resources. Retrieved 2014-05-30.
  55. ^ "Dr. JW Cook's World Record Brook Trout Was Caught in 1915". Brooktrout.ca. Retrieved 2013-07-10.
  56. ^ "Browny. The Fish, Fish'n Line Magazine". Anglingmasters.com. Archived from the original on 2013-01-16. Retrieved 2013-07-10.
  57. ^ "Brook trout records". troutster.com.
  58. ^ "The artificial propagation of warm-water finfishes A manual for extension". www.fao.org. Retrieved 2024-03-24.
  59. ^ Shelbourne, J. E. (1964-01-01), Russell, F. S. (ed.), The Artificial Propagation of Marine Fish, Advances in Marine Biology, vol. 2, Academic Press, pp. 1–83, doi:10.1016/S0065-2881(08)60030-9, ISBN 978-0-12-026102-4, retrieved 2024-03-24
  60. ^ a b c White, Shannon L.; Miller, William L.; Dowell, Stephanie A.; Bartron, Meredith L.; Wagner, Tyler (January 1960). "Limited hatchery introgression into wild brook trout ( Salvelinus fontinalis ) populations despite reoccurring stocking". Evolutionary Applications. 11 (9): 1567–1581. doi:10.1111/eva.12646. ISSN 1752-4571. PMC 6183464. PMID 30344628.
  61. ^ "Trout Profile". Agricultural Marketing Resource Center. March 2012. Archived from the original on 2013-12-03. Retrieved 2014-05-28.
  62. ^ a b "Pots of Gold: Hand-Spawning Native Trout · Tennessee Aquarium". Tennessee Aquarium. 2021-11-10. Retrieved 2024-03-24.
  63. ^ "What's in fish feed? - Skretting Australia". Skretting. Archived from the original on 2018-11-26. Retrieved 2018-11-26.
  64. ^ "Floating Feed — Corey Aquafeeds". Corey Aquafeeds. Retrieved 2018-11-26.
  65. ^ "Eastern Brook Trout: Status and Threats". Trout Unlimited for the Eastern Brook Trout Joint Venture. Retrieved 2013-12-29.
  66. ^ "Bonneville cutthroat trout (Oncorhynchus clarkii utah) - Species Profile". Nonindigenous Aquatic Species. 2012-01-30. Retrieved 2022-03-17.
  67. ^ Camuto, Christopher (1990). "Air and Rain". A Fly Fisherman's Blue Ridge. New York: Henry Holt & Company. pp. 85–87. ISBN 0-8050-1466-7.
  68. ^ "Royal Ontario Museum's page on the Aurora trout". Rom.on.ca. Retrieved 2013-07-10.
  69. ^ "Protect, Restore and Enhance". Retrieved 2013-12-29.
  70. ^ "The Southern Appalachian Brook Trout Foundation". Archived from the original on 2013-12-27. Retrieved 2013-12-27.
  71. ^ Jason B. Dunham; Susan B. Adams; Robert E. Schroeter & Douglas C. Novinger (2002). "Alien invasions in aquatic ecosystems: Toward an understanding of brook trout invasions and potential impacts on inland cutthroat trout in western North America" (PDF). Reviews in Fish Biology and Fisheries. 12 (4): 373–391. doi:10.1023/A:1025338203702. S2CID 8442159.
  72. ^ "Salvelinus fontinalis (fish)". IUCN SSC Invasive Species Specialist Group (ISSG). Retrieved 2014-01-06.
  73. ^ Peterson, Lesley (Spring 2013). "Loved in Eastern Canada, Loathed in the Rockies: The Two Sides of Brook Trout" (PDF). Currents. 19 (2). Trout Unlimited Canada: 1–3. Retrieved 2013-01-06.
  74. ^ Shepard, Bradley B. (2009). "SWG Final Report: Factors that influence invasion of nonnative brook trout (Salvelinus fontinalis)and their displacement of native cutthroat trout (Oncorhynchus clarkii) in the Northern Rocky Mountains". Montana Department of Fish, Wildlife & Parks. Retrieved 2014-04-13.
  75. ^ a b Peterson, Douglas P.; Fausch, Kurt D.; White, Gary C. (June 2004). "Population Ecology of an Invasion: Effects of Brook Trout on Native Cutthroat Trout". Ecological Applications. 14 (3): 754–772. Bibcode:2004EcoAp..14..754P. doi:10.1890/02-5395. ISSN 1051-0761.
  76. ^ Frank, Charles W. (2014-04-02). "Under the Radar – The Trout Eradication Program Save the Fish". eTerritorial Dispatch Yuba County, Sutter County, Nevada County and Colusa County. Retrieved 2014-04-13.
  77. ^ Carmona-Catot, Gerard; Moyle, Peter B.; Aparicio, Enric; Crain, Patrick K.; Thompson, Lisa C.; García-Berthou, Emili (2010-11-01). "Brook Trout Removal as a Conservation Tool to Restore Eagle Lake Rainbow Trout" (PDF). North American Journal of Fisheries Management. 30 (5). American Fisheries Society: 1315–1323. Bibcode:2010NAJFM..30.1315C. doi:10.1577/m10-077.1. hdl:10256/7472. Archived from the original (PDF) on 2016-03-04.
  78. ^ "2021 Yellowstone National Park Fishing Regulations" (PDF). National Park Service. Retrieved 2014-04-13.

Further reading

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