Northern rock sole

Northern rock sole
Northern rock sole
Conservation status
Not evaluated
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Pleuronectiformes
Family: Pleuronectidae
Genus: Lepidopsetta
Species: L. polyxystra
Binomial name
Lepidopsetta polyxystra
(Orr & Materese, 2000)

The Northern rock sole, Lepidopsetta polyxystra, is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on sand, mud and gravel bottoms at depths of up to 700 metres (2,300 ft), though it is most commonly found between 19 and 246 metres (62 and 807 ft). Its native habitat is the temperate waters of the northern Pacific, from Puget Sound to Alaska (overlapping the range of the rock sole), the Aleutian Islands and across the Bering Sea to the Kuril Islands and the Sea of Okhotsk (overlapping the range of the dusky sole). Males grow up to 69 centimetres (27 in) in length, whilst females can reach 49 centimetres (19 in). The maximum recorded lifespan is 18 years.[1]


Taxonomy and Nomenclature

Prior to 2000 the Northern rock sole and the rock sole, Lepidopsetta bilineata, were considered to be a single species under the genus Lepidopsetta, but work by Orr & Matarese published in 2000 reorganised the genus into three separate taxa.[2]

As a result of this reclassification and renaming, the rock sole L. bilineata may be referred to as the "southern" rock sole, in order to avoid confusion with the Northern rock sole L. polyxystra.[3]

Role in ecosystem

The Northern rock sole occupies a moderately high trophic level in the food chain.


The diet of the Northern rock sole consists mainly of zoobenthos polychaetes and amphipods.[4]


Northern rock sole are eaten by marine mammals and other fish, including sharks, Alaska pollock, yellowfin sole, Pacific halibut and Pacific cod.[1][3]


Northern rock sole reach reproductive maturity at between 4 and 7 years old, and spawn in winter through to early spring. Eggs are demersal and stick to the surface on which they are laid; hatching takes from 6 to 25 days.[3]

Commercial fishing

Northern rock sole is fished commercially, and forms an important part of two trawl fisheries in the Bering Sea and Gulf of Alaska. Although it was overfished in the 1960s stocks have recovered, and the biomass of Northern rock sole in the Bering Sea and Aleutian Islands fishery is now estimated to be very high, at twice the level required to support maximum sustainable yield. In 2008 the estimated Northern rock sole biomass in the Gulf of Alaska fishery was some 102,303 tons, compared to catches ranging from 453 tons in 2004 to 4,330 tons in 2006.[3]

Northern rock sole fishing off the coast of the United States is managed by the North Pacific Fishery Management Council, one of eight U.S. Regional Fishery Management Councils.[3]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Nationalisation of Northern Rock — People queuing at a branch of the Northern Rock bank in Brighton on 14 September 2007. In 2008 the Northern Rock bank was nationalised by the British Government, due to financial problems caused by the subprime mortgage crisis. In 2010 the bank… …   Wikipedia

  • Northern Ontario —   Region   ██ Core area ██ Extended area Country …   Wikipedia

  • Northern Brown Argus — Scientific classification Kingdom: Animalia Phylum …   Wikipedia

  • Sole (artist) — For the other hip hop emcee with a similar name, see Solé. Sole Birth name Tim Holland Also known as Man s Best Friend Born September 25, 1977 (1977 09 25) (age 34) Portland, Maine …   Wikipedia

  • Northern Virginia — Reston, an internationally known planned community,[1] seen from the Dulles Toll Road. Northern Virginia consists of several counties and independent cities in the Commonwealth of Virginia, in a widespread region generally radiating sout …   Wikipedia

  • sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

  • Sedimentary rock — Middle Triassic marginal marine sequence of siltstones (below) and limestones (above), Virgin Formation, southwestern Utah, USA Sedimentary rock are types of rock that are formed by the deposition of material at the Earth s surface and within… …   Wikipedia

  • University of Northern Colorado — Coordinates: 40°24′17″N 104°41′48″W / 40.404853°N 104.696741°W / 40.404853; 104.696741 …   Wikipedia

  • Burlington-Rock Island Railroad — Infobox SG rail railroad name=Burlington Rock Island Railroad logo filename= logo size= old gauge= marks=BRI locale=Texas start year=1902 end year=1965 hq city=Teague, Texas The Burlington Rock Island Railroad reporting mark|BRI officially came… …   Wikipedia

  • List of sports venues with sole naming rights — The following is a list of sports venues with sole naming rights:Present naming rightsAustralia* AAMI Stadium in Adelaide, South Australia * Acer Arena in Sydney, New South Wales * ANZ Stadium in Sydney, New South Wales * Aurora Stadium in… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.