Dolly Varden trout

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Dolly Varden trout
Dolly Varden char.jpg
adult in spawning colors
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Salvelinus
Species:
S. malma
Binomial name
Salvelinus malma
(Walbaum, 1792)
Synonyms [1]
including current subspecies
  • Salmo malmaWalbaum, 1792Salvelinus alpinus malma(Walbaum, 1792)Salvelinus malma malma(Walbaum, 1792)Salmo spectabilisGirard, 1856Salvelinus malma spectabilis(Girard, 1856)Salvelinus spectabilis(Girard, 1856)Salmo bairdiiSuckley, 1861Salvelinus bairdii(Suckley, 1861)Salmo parkeiSuckley, 1861Salvelinus parkei(Suckley, 1861)Salmo parkiiSuckley, 1861Salmo lordiiGünther, 1866Fario lordii(Günther, 1866)Salmo tudes(Cope, 1873)Salvelinus malma tudes(Cope, 1873)Salvelinus miyabei(Oshima, 1938)Salvelinus malma miyabei(Oshima, 1938)Salvelinus namaycush(non Walbaum, 1792)Salmo fariopsis(non Kner, 1870)Salvelinus malma krascheninnikova(non Taranetz, 1933)

The Dolly Varden trout (Salvelinus malma) is a species of salmonid ray-finned fish native to cold-water tributaries of the Pacific Ocean in Asia and North America. Despite the name "trout" (which typically refers to freshwater species from the genera Salmo and Oncorhynchus ), it belongs to the genus Salvelinus (chars), which includes 51 recognized species, the most prominent being the brook, lake and bull trout as well as the Arctic char. Although many populations are semi-anadromous, riverine and lacustrine populations occur throughout its range. It is considered by taxonomists as part of the Salvelinus alpinus (Arctic char) complex, as many populations of bull trout, Dolly Varden trout and Arctic char overlap.

Contents

Taxonomy

The scientific name of the Dolly Varden is Salvelinus malma. [2] The species was originally named by German naturalist and taxonomist Johann Julius Walbaum in 1792 based on type specimens from the Kamchatka Peninsula in Siberia. The name malma was based on Russian мальма, the local colloquial name for the fish. The Dolly Varden trout is considered part of the S. alpinus or Arctic char complex. [3]

For most of the 19th and 20th centuries, the Dolly Varden trout (S. malma) and the bull trout (S. confluentus) were considered the same species. Additionally, the Arctic char (S. alpinus) along with the bull trout have ranges that overlap and are remarkably similar in appearance, thus complicating identification. In 1978, inland forms of the Dolly Varden trout were reclassified as Salvelinus confluentus, retaining the common name bull trout. [4] It appears that the first recorded use of the Dolly Varden name for fish referred to S. confluentus, now commonly known as the bull trout. This was likely due to overlapping ranges and similar appearances among members of the two species.

Subspecies

Dolly Varden fingerling at Hokkaido Japan aquarium, probably Salvelinus malma miyabei Dolly Varden Trout (Salvelinus malma) (15257826670).jpg
Dolly Varden fingerling at Hokkaido Japan aquarium, probably Salvelinus malma miyabei

In North America, two subspecies of Dolly Varden are distinguished, the Northern Dolly Varden (S. m. malma) of the Arctic drainages and the Southern Dolly Varden (S. m. lordi) of the Pacific drainages. [2] [3] These can be distinguished as separate mitochondrial lineages also. [3] The status of the Beringian drainage populations remains unclear. Northern populations on the Russian side of the Pacific down to Kamchatka are considered S. m. malma, and the southerly populations make another lineage and subspecies, the Asian Dolly Varden (or southern Dolly Varden) S. m. krascheninnikova (= S. curilus ). The landlocked Miyabe Char (S. m. miyabei Oshima, 1938) from Lake Shikaribetsu on Hokkaido in Japan is also included in the Dolly Varden species. [5] [6]

Origin of common name "Dolly Varden"

A freshly caught fish Dolly Varden in hand.jpg
A freshly caught fish

The first recorded use of the name "Dolly Varden" was applied to members of S. confluentus caught in the McCloud River in northern California in the early 1870s. In his book Inland Fishes of California, Peter B. Moyle recounts a letter sent to him on March 24, 1974, from Valerie Masson Gomez:

My grandmother's family operated a summer resort at Upper Soda Springs on the Sacramento River just north of the present town of Dunsmuir, California. She lived there all her life and related to us in her later years her story about the naming of the Dolly Varden trout. She said that some fishermen were standing on the lawn at Upper Soda Springs looking at a catch of the large trout from the McCloud River that were called 'calico trout' because of their spotted, colorful markings. They were saying that the trout should have a better name. My grandmother, then a young girl of 15 or 16, had been reading Charles Dickens' Barnaby Rudge in which there appears a character named Dolly Varden; also the vogue in fashion for women at that time (middle 1870s) was called "Dolly Varden", a dress of sheer figured muslin worn over a bright-colored petticoat. My grandmother had just gotten a new dress in that style and the red-spotted trout reminded her of her printed dress. She suggested to the men looking down at the trout, 'Why not call them "Dolly Varden"?' They thought it a very appropriate name and the guests that summer returned to their homes (many in the San Francisco Bay area) calling the trout by this new name. David Starr Jordan, while at Stanford University, included an account of this naming of the Dolly Varden Trout in one of his books.

In 1874, Livingston Stone, a naturalist working for the U.S. government, wrote of this fish:

Also called at (Upper) Soda Springs the 'Varden' trout. ... The handsomest trout, and, on the whole, having the most perfect form of all the trout we saw on the McCloud. Also, the only fish that had colored spots. This one was profusely spotted over most of the body with reddish golden spots. ... The local name at (Upper) Soda Springs is the Dolly Varden. [7]

Although the name "Dolly Varden" was originally given to the bull trout of the McCloud River, bull trout (S. confluentus) and Dolly Varden trout (S. malma) were considered the same species (S. malma) until 1978. Thus the common name "Dolly Varden" gained acceptance for S. malma for over 100 years. Additionally, the Arctic char (S. alpinus) and Russian subspecies have been referred to as Dolly Varden. [8] It is known as belyi golets in Russian. [9]

Description

Dolly Varden in crystal clear river at the Bering Land Bridge National Preserve Dolly-Varden- Morgan Bond, U of Washington edit (15651417154).jpg
Dolly Varden in crystal clear river at the Bering Land Bridge National Preserve

The back and sides are olive green or muddy gray, shading to white on the belly. The body has scattered pale yellow or pinkish-yellow spots. There are no black spots or wavy lines on the body or fins. Small red spots are present on the lower sides. These are frequently indistinct. The fins are plain and unmarked except for a few light spots on the base of the caudal fin rays. S. malma is extremely similar in appearance to the bull trout (S. confluentus) and Arctic char (S. alpinus), so much so that they are sometimes referred to as "native char" without a distinction. [10]

Range

U.S. range map for Salvelinus malma, Dolly Varden trout SalvelinusMalmaNonIndigenousRangeMap.JPG
U.S. range map for Salvelinus malma, Dolly Varden trout

The Dolly Varden trout is found in coastal waters of the North Pacific from Puget Sound north along the British Columbia Coast to the Alaska Peninsula and into the eastern Aleutian Islands, along the Bering Sea and the Arctic Sea to the Mackenzie River. [11] The range in Asia extends south through the Kamchatka Peninsula into northern Japan.

Life cycle

Dolly Varden are found in three distinct forms. A semi-anadromous or sea-run form migrates from fresh water and spends some time in the ocean or saltwater bays and estuaries to feed before returning to fresh water to spawn. Fluvial forms live in moderate to large freshwater riverine environments and migrate into smaller tributaries to spawn. A third form is found in deep, cold lakes, from where they eventually migrate into tributary streams to spawn. Most populations of the northern Dolly Varden (S. m. malma) are semi-anadromous, while more fluvial and lacustrine populations are found among the southern Dolly Varden (S. m. lordi).

Conservation

Dolly in shallow water, Kenai National Wildlife Refuge, Alaska Dolly Varden trout KNWR.png
Dolly in shallow water, Kenai National Wildlife Refuge, Alaska

In the early 20th century, the Dolly Varden (still including bull trout, and often confused with Arctic char) suffered from a reputation as an undesirable predator of fish such as salmon, steelhead and cutthroat trout. Despite co-evolving with these other species for thousands of years, Dolly Varden were accused of indiscriminately feeding on eggs and fry of other species to their detriment. [12] Between 1921 and 1941, the Territory of Alaska, supported by the U.S. Bureau of Fisheries, had an official extermination program that paid bounties on Dolly Varden. [8] In the Iliamna Lake/Kvichak River region in southwest Alaska, the bounty was 2.5 cents per Dolly Varden tail turned into the territorial tax collector. Locals would trap Dolly Varden in nets and weirs, string 40 tails on a hoop of bailing wire and smoke them over a wood fire. One hoop would be worth one dollar. The fish carcasses would be used for dog food. The hoops of fishtails were then used as currency to pay for supplies, or in some reports, airfare with local bush pilots. [13]

The northern Dolly Varden in the Canadian province of British Columbia and in the federal region of the Northwest Territories is listed as a species of special concern. [14]

Fishing

The Dolly Varden is considered and regulated as a game fish in the U.S. and Canada. Dolly Varden make up a sizable percentage of the catch in Alaskan subsistence fisheries where salmon are not abundant. [15] Anglers will use a variety of lures to catch Dolly Varden, but when fishing during salmon spawning season, salmon roe is the bait of choice. [16]

Related Research Articles

<span class="mw-page-title-main">Trout</span> Freshwater fish from subfamily Salmoninae

Trout is a generic common name for numerous species of carnivorous freshwater ray-finned fishes belonging to the genera Oncorhynchus, Salmo and Salvelinus, all of which are members of the subfamily Salmoninae in the family Salmonidae. The word trout is also used for some similar-shaped but non-salmonid fish, such as the spotted seatrout/speckled trout.

<span class="mw-page-title-main">McCloud River</span> River in California, United States

The McCloud River is a 77.1-mile (124.1 km) long river that flows east of and parallel to the upper Sacramento River, in Siskiyou County and Shasta County in northern California in the United States. Protected under California's Wild and Scenic Rivers Act (1972), it drains a scenic mountainous area of the Cascade Range, including part of Mount Shasta. It is a tributary of the Pit River, which in turn flows into the Sacramento River. The three rivers join in Shasta Lake, formed by Shasta Dam north of Redding.

<span class="mw-page-title-main">Bull trout</span> Species of fish

The bull trout is a char of the family Salmonidae native to northwestern North America. Historically, S. confluentus has been known as the "Dolly Varden", but was reclassified as a separate species in 1980. Populations of bull trout in the lower 48 states are listed as threatened under the U.S. Endangered Species Act, and bull trout overall are listed as vulnerable to extinction on the IUCN Red List of Threatened Species. The Saskatchewan-Nelson Rivers population in Alberta, Canada is listed as threatened under the Species at Risk Act.

Dolly Varden may refer to:

<span class="mw-page-title-main">Arctic char</span> Species of fish

The Arctic char or Arctic charr is a cold-water fish in the family Salmonidae, native to alpine lakes, as well as Arctic and subarctic coastal waters in the Holarctic.

<span class="mw-page-title-main">Sea trout</span> Form of brown trout

Sea trout is the common name usually applied to anadromous (sea-run) forms of brown trout, and is often referred to as Salmo trutta morpha trutta. Other names for anadromous brown trout are bull trout, sewin (Wales), peel or peal, mort, finnock (Scotland), white trout (Ireland), Dollaghan and salmon trout (culinary).

<span class="mw-page-title-main">Silver trout</span> Extinct species of fish

The silver trout is an extinct char species or subspecies that inhabited a few waters in New Hampshire in the United States prior to 1939, when a biological survey conducted on the Connecticut watershed by the New Hampshire Fish and Game Department found none.

Salvelinus curilus is a species of anadromous fish in the salmon family. It inhabits the waters of Russian Far East in the Kurile Islands, Sakhalin, Primorye and also Korea and Japan. It has mostly been considered a subspecies of the Dolly Varden trout Salvelinus malma, with the name Salvelinus malma krascheninnikova, and referred to as the southern Dolly Varden or Asian southern form Dolly Varden trout.

<i>Salvelinus</i> Genus of fishes

Salvelinus is a genus of salmonid fish often called char or charr; some species are called "trout". Salvelinus is a member of the subfamily Salmoninae within the family Salmonidae. The genus has a northern circumpolar distribution, and most of its members are typically cold-water fish that primarily inhabit fresh waters. Many species also migrate to the sea.

<span class="mw-page-title-main">Koyuk River</span> River in Alaska, United States

The Koyuk River is a river on the Seward Peninsula of western Alaska, in the United States. The river originates in the interior of the peninsula, at the Lost Jim Lava Flow of the Bering Land Bridge National Preserve, where it flows southeast towards the mouth of Norton Bay on Norton Sound. The native village of Koyuk is located at its mouth. The two major tributaries are the Peace and Salmon rivers; other tributaries include Dime and Sweepstakes.

The angayukaksurak char is a type of salmonid fish found in Alaska in a few select Brooks Range headwaters.

<span class="mw-page-title-main">Sunapee trout</span> Subspecies of fish

The Sunapee trout, also called blueback trout, Sunapee Golden trout, or Quebec red trout, is a putative subspecies of Arctic char native to northeastern New England in the United States, as well as Québec and New Brunswick in Canada, with introduced populations in Idaho.

<span class="mw-page-title-main">Kype</span>

A kype is a hook-like secondary sex characteristic which develops at the distal tip of the lower jaw in some male salmonids prior to the spawning season. The structure usually develops in the weeks prior to, and during, migration to the spawning grounds. In addition to the development of the kype, a large depression forms in the two halves of the premaxilla in the upper jaw, allowing the kype to fit into the premaxilla when the mouth is closed.

Salvelinus albus, also known as white char, is a species of freshwater fish in the salmon family. It is endemic to the Kamchatka Peninsula, Russia, including the Lake Kronotskoye drainage basin.

Salvelinus vasiljevae, commonly known as Sakhalinian char, is a species of freshwater fish in the salmon family. It is found in the wider Sakhalin region from Nevelskoy Strait and the Amur river basin.

References

  1. ↑ "Synonyms of Salvelinus malma (Walbaum, 1792)". Fishbase.org. Retrieved 2014-02-22.
  2. 1 2 Behnke, Robert J.; Tomelleri, Joseph R. (illustrator) (2002). "Dolly Varden". Trout and Salmon of North America. New York: The Free Press. pp. 313–322. ISBN   0-7432-2220-2.
  3. 1 2 3 M.W. Kowalchuk; C.D. Sawatzky & J.D Reist (2010). "A Review of the Taxonomic Structure within Dolly Varden, Salvelinus malma (Walbaum 1792), of North America (Research Document 2010/013)" (PDF). Assessment of the Nafo 4T Southern Gulf of St. Lawrence Herring Stocks in ... = Évaluation des Stocks de Hareng de la Zone 4T de l'Opano dans le Sud du Golfe du Saint-Laurent en. Winnipeg, Canada: Fisheries and Oceans Canada/Pêches et Océans Canada, Freshwater Institute/Institut des eaux douces. ISSN   1919-5044. Archived from the original (PDF) on 20 September 2016.
  4. ↑ Cavendar, T.M. (1978). "Taxonomy and distribution of the bull trout, Salvelinus confluentus, (Suckley) from the American Northwest". California Fish and Game. 64 (3): 139–174.
  5. ↑ Salvelinus malma miyabei FishBase (2014)
  6. ↑ Maekawa, Koji (1977). "Studies on the Variability of the Land-locked Miyabe Char, Salvelinus malma miyabei". Japanese Journal of Ichthyology. 24 (1): 49–56. doi: 10.11369/jji1950.24.49 .
  7. ↑ Stone, Livingston (1874). VI. Report of Operations During 1872 at the United States Salmon-Hatching Establishment on the M'Cloud River, and on the California Salmonidae generally; with a list of Specimens Collected. By Livingstone Stone. In: United States Commission of Fish and Fisheries. Part II. Report of the Commissioner for 1872 and 1873. A- Inquiry into the Decrease of the Food Fishes. B- The Propagation of Food-Fishes in the Waters of the United States. With Supplementary Papers (Report). Washington D.C.: Government Printing Office. pp. 203–207.
  8. 1 2 Behnke, Robert J.; Williams, Ted (2007). "Dolly Varden Fall 1985". About Trout: The Best of Robert J. Behnke from Trout Magazine. Globe Pequot. pp. 39–44. ISBN   978-1-59921-203-6.
  9. ↑ "IFM Geomar - Ozeanografie, Ozeanologie und Meteorologie". filaman.ifm-geomar.de.
  10. ↑ "Washington's Native Char". Fishing & Shellfishing. Washington Department of Fish and Wildlife. Archived from the original on 2014-11-08. Retrieved 2014-02-05.
  11. ↑ Haas, Gordon R.; McPhail, J. D. (1991). "Systematics and Distributions of Dolly Varden (Salvelinus malma) and Bull Trout (Salvelinus confluentus) in North America". Canadian Journal of Fisheries and Aquatic Sciences. 48 (11). Ottawa: NRC Research Press: 2191–2211. doi:10.1139/f91-259.
  12. ↑ Decicco, Fred (May 2005). "Dolly Varden: Beautiful and Misunderstood Dolly Varden's Reputation as Varmint Undeserved". Alaska Fish and Wildlife News. Alaska Department of Fish and Game. Retrieved 2014-01-29.
  13. ↑ Dufresne, Frank (2002). "Fishtail Poker". In Merrit J. I. (ed.). The Best of Field and Stream-100 Years of Great Writing From America's Premier Sporting Magazine. Guilford, CT: Globe Pequot Press. pp. 289–293.
  14. ↑ "Information Summary on the Proposed Listing of Dolly Varden (Northern Form) as "Special Concern" Under the Species at Risk Act" (PDF). Fisheries and Oceans Canada. Retrieved 2014-01-28.
  15. ↑ "Alaska Subsistence Salmon Fisheries 2009 Annual Report" (PDF). Alaska Department of Fish and Game-Division of Subsistence. June 2012. Retrieved 2014-02-28.
  16. ↑ "How to Catch Dolly Varden - the Ultimate Guide". 8 June 2020.
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