| European plaice | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Carangiformes |
| Family: | Pleuronectidae |
| Genus: | Pleuronectes |
| Species: | P. platessa |
| Binomial name | |
| Pleuronectes platessa | |
| Synonyms [2] | |
The European plaice (Pleuronectes platessa), commonly referred to as simply plaice, is a species of marine flatfish in the genus Pleuronectes of the family Pleuronectidae.
The European plaice is characterized, on their dorsal side, by their dark green to dark brown skin, blotched with conspicuous, but irregularly distributed, orange spots. The ventral side is pearly white. The skin is smooth with small scales. They are able to adapt their colour somewhat to match that of their surroundings, but the orange spots always remain visible. [3] The skin lacks any prickles.
The outline of adults is oval. The head is rather small and is less than 25% of the total length. The pointed mouth is terminal and fairly small with its maxilla reaching just below the right eye. Both eyes are located at the right side of the body. The bony ridge behind the eyes is another characteristic for this species. The lateral line curves slightly above the pectoral fin. The dorsal fin reaches the eye. The dorsal and anal fins are distant from the caudal fin. The anal fin contains 48 to 59 soft rays and is preceded by a spine. The dorsal fin has 65 to 79 soft rays, the pectoral fin 10 to 11, and the ventral fin six. [4]
European plaice can live up to 20 years and will reach its maximum size at about 50 to 70 cm but individuals up to 78 cm and 5.7 kg have been observed. [5]
European plaice is a common flatfish which inhabits sandy and muddy bottoms of the European shelf, usually at depths between 10 and 200 m. It is found from the Barents Sea down to the Iberian peninsula and around Iceland and the Faroe Islands. It is often reported in ichthyological check lists for the Mediterranean Sea but this is likely to be misidentified specimens of European flounder. [6]
Adult fish are generally found in deeper waters whereas young fish are found in shallow waters e.g. estuaries and sandy coasts. Plaice tend to burrow in the sediment during the day and remain stationary for long periods to avoid predators and ambush prey.
It is active at night and feeds on polychaetes, crustaceans and bivalves. [7] Young plaice (between 1 and 2 years old) tend to consume mainly shrimps.
The main spawning grounds in the North Sea are located in the Southern Bight and in the eastern English Channel. Plaice are determinate spawners in which fecundity is determined before the onset of spawning. Females mature, i.e. are able to spawn, at ages from 3 to 7 years. However, in the North Sea, most females mature at 3 years. Ovary development begins around late August to September with the spawning being from December to May. Each female releases eggs in batches every 3 to 5 days for around a month.
The eggs hatch after about two weeks and drift passively in the plankton. The larvae drift in the plankton and metamorphose after about 8 to 10 weeks, dependent on temperature, at which time they settle in the intertidal zone of sandy beaches. The larvae exhibit what is sometimes called semiactive tidal transport. As the larvae cannot swim against the prevailing currents, they make use of their ability to alter their vertical position in the water column to ensure they are transported to suitable habitat. On incoming or flood tides (water level is rising), the larvae move up into the water column and are thus transported towards land. On the outgoing or ebb tides (water level is falling), the larvae move down the water column and are not transported away from the intertidal by the tidal currents.
When the larvae have reached a suitable site for settlement, the metamorphosis to the asymmetric body shape takes place. This can take up to 10 days.
Recently transformed juveniles settle onto shallow intertidal beaches. The very youngest juveniles will, for a period of up to a week, strand themselves in very shallow pools on the intertidal once the tide has receded. The reasons for this behaviour are not clear. During the first year of life (when the fish are called 0+ group), the juveniles will stay in these shallow intertidal habitats for up to 7 months (depending on latitude and/or temperature), before migrating to deeper waters. Some of these fish will return the next year (when they are I+ group) and even fewer when they are II+ group; however, the majority of juveniles do not return after they have migrated during their first year.
European plaice are generally caught as part of a mixed flatfish fishery or in other groundfish fisheries. The most common gears used in these fisheries are beam trawls, otter trawls and Danish seine. It is also caught in other fishing gears such as bottom set gillnets, longlines and hand lines. The majority of landings of European plaice are caught in the North Sea. Total landings peaked in 1985–1990 when approximately 200 thousand tonnes were landed, current landings are generally less than 120 thousand tonnes.
After a period of time in the 1980s and 1990s where landings exceeded management advice for several stocks, the fishing pressure has been reduced and the status of the stocks has improved and all the stocks are considered to be within safe biological limits as defined by ICES.
Plaice is sometimes used as the fish in fish and chips, in countries where the dish is popular. [8]
In North German and Danish cuisine, plaice is one of the most commonly eaten fishes. Filleted, battered, and pan-fried plaice is popular hot or cold as an open sandwich topping together with remoulade sauce and lemon slices. Battered plaice can also be served hot with french fries and remoulade sauce as a main dish; this fish and chips variant is commonly available as a children's special in Danish restaurants. Breaded frozen plaice, ready to be baked or fried at home, is readily available in supermarkets. Fresh plaice is also oven-baked.
A flatfish is a member of the ray-finned demersal fish order Pleuronectiformes, also called the Heterosomata, sometimes classified as a suborder of Perciformes. In many species, both eyes lie on one side of the head, one or the other migrating through or around the head during development. Some species face their left sides upward, some face their right sides upward, and others face either side upward.
The milkfish is a widespread species of ray-finned fish found throughout the Indo-Pacific. It is the sole living species in the family Chanidae, and the only living member of the genus Chanos. The repeating scientific name (tautonym) is from Greek khanos. They are grouped in the order Gonorhynchiformes and are most closely related to the Ostariophysi—freshwater fishes such as carps, catfish, and loaches.
The haddock is a saltwater ray-finned fish from the family Gadidae, the true cods. It is the only species in the monotypic genus Melanogrammus. It is found in the North Atlantic Ocean and associated seas, where it is an important species for fisheries, especially in northern Europe, where it is marketed fresh, frozen and smoked; smoked varieties include the Finnan haddie and the Arbroath smokie. Other smoked versions include long boneless, the fileted side of larger haddock smoked in oak chips with the skin left on the fillet.
The Atlantic horse mackerel, also known as the European horse mackerel or common scad, is a species of jack mackerel in the family Carangidae, which includes the jacks, pompanos and trevallies. It is found in the eastern Atlantic Ocean off Europe and Africa and into the south-eastern Indian Ocean. It is an important species in commercial fisheries and is listed as a Vulnerable species on The IUCN Red List of Threatened Species.
The common dab is an edible flatfish of the family Pleuronectidae. It is a demersal fish native to shallow seas around Northern Europe, in particular the North Sea, where it lives on sandy bottoms down to depths of about 100 metres (330 ft). It can reach 40 centimetres (16 in) in length and can weigh up to 1 kilogram (2.2 lb), though most specimens grow no longer than 20 centimetres (7.9 in).
Coregonus albula, known as the vendace or as the European cisco, is a species of freshwater whitefish in the family Salmonidae. It is found in lakes in northern Europe, especially Finland, Latvia, Lithuania, Sweden, Russia and Estonia, and in some lakes of Norway, the United Kingdom, northern Germany, and Poland. It is also found in diluted brackish water in the Gulfs of Finland and Bothnia, both of which are in the Baltic Sea.
The common ling, also known as the white ling or simply the ling, is a large member of the family Lotidae, a group of cod-like fishes. It resembles the related rocklings, but it is much larger and has a single barbel. This species is unrelated to the pink ling, Genypterus blacodes, from the Southern Hemisphere. The common ling is found in the northern Atlantic, mainly off Europe, and into the Mediterranean Basin. It is an important quarry species for fisheries, especially in the northeastern Atlantic, although some doubts exist as to the sustainability of the fisheries. As an edible species, it is eaten fresh, frozen, or dried, but also preserved in lye, while the roe is a delicacy in Spain.
The yellowbelly flounder is a flatfish of the genus Rhombosolea, found around New Zealand. A different species from the genus Rhombosolea is found in Australia and also goes by the name yellow-belly flounder. The Māori people have commonly fished for R. leporina, and many other species of flatfish, throughout New Zealand's coastal waters for hundreds of years. The Māori name for this species is pātiki tōtara.
The megrim, megrim sole, whiff, or Cornish sole is a species of left-eyed flatfish in the family Scophthalmidae. It is found in the northeast Atlantic and Mediterranean Sea between 100 and 700 m below sea level. It is caught commercially by some countries.
The witch, known in English by a variety of other common names including the witch flounder, pole flounder, craig fluke, Torbay sole, and grey sole, is a species of flatfish from the family Pleuronectidae. It occurs on both sides of the North Atlantic Ocean on muddy sea beds in quite deep water. In northern Europe it has some importance in fisheries as a food fish.
The mutton snapper is a species of marine ray-finned fish, a snapper belonging to the family Lutjanidae. It is found in the Western Atlantic Ocean.
The yellowtail flounder, also known as the rusty dab, is a species of flatfish in the family Pleuronectidae. Reaching 56 cm (22 in) in length, it has reddish brown upperparts, pale underparts and yellow fins. Both its eyes are on the right (upper) side of its body. Found in the western North Atlantic, it has been fished commercially by North American fisheries for food. A victim of overfishing, the yellowtail flounder is categorized as "Vulnerable" by the International Union for Conservation of Nature.
The European flounder is a flatfish of European coastal waters from the White Sea in the north to the Mediterranean and the Black Sea in the south. It has been introduced into the United States and Canada accidentally through transport in ballast water. It is caught and used for human consumption.
This is a glossary of terms used in fisheries, fisheries management and fisheries science.
Plaice is a common name for a group of flatfish that comprises four species: the European, American, Alaskan and scale-eye plaice.
Merluccius merluccius, the European hake, is a merluccid hake of the genus Merluccius. Other vernacular names include Cornish salmon and herring hake. It is a predatory species, which was often netted alongside one of its favoured prey, the Atlantic herring, hence the latter common name. It is found in the eastern Atlantic from Norway and Iceland south to Mauritania and into the Mediterranean Sea. It is an important species in European fisheries and is heavily exploited, with some populations being fished unsustainably.
The yellowfin sole is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on soft, sandy bottoms at depths of up to 700 metres (2,300 ft), though it is most commonly found at depths of around 91 metres (299 ft). Its native habitat is the temperate waters of the northern Pacific, from Korea and the Sea of Japan to the Sea of Okhotsk, the Bering Sea and Barkley Sound on the west coast of Canada. Males grow up to 49 cm (19 in) in length, though the common length is around 33.5 cm (13.2 in). The maximum recorded weight is 1.7 kg (3.7 lb), and the maximum recorded lifespan is 26 years.
The Arctic flounder, also known as the Christmas flounder, eelback flounder and Polar plaice, is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on coastal mud bottoms in salt, brackish and fresh waters at depths of up to 90 metres (300 ft). Its native habitat is the polar waters of the northeastern Atlantic and Arctic oceans, from the White and Barents seas to the coasts of Siberia in Russia and Queen Maud Gulf in Canada, and from the Chuckchi and Bering seas to Bristol Bay in Alaska and the northern Sea of Okhotsk. It can grow up to 35 centimetres (14 in) in length.
The blackfin seabass is a Perciforme fish in the family lateolabracidae, found primarily in the shallow waters of the Pacific coast of Asia, in Japan and in South Korea. There are only two species in the genus Lateolabrax, known as Asian seabasses. As a perciforme, the blackfin seabass is among the largest order of fish in the ocean. Blackfin seabass live in shallow, tidal or rocky surf zones, partially as a way to escape competition with the Japanese seabass Lateolabrax japonicus, a close and almost identical relative of theirs, and partially for the breeding opportunity in brackish water by the mouths of rivers.
Hydrographic containment is a concept in fisheries oceanography that refers to the way a fish population utilizes different tides and currents at different times to remain in a certain region. This concept was developed based on Harden Jones' triangle of migration. This refers to the idea that fish migrate from their spawning grounds to their nursery ground. Then from the nursery grounds, they join the adult population of fish at the feeding ground. Finally, the fish returns to the spawning grounds to spawn.
