Nordsøen Oceanarium

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Nordsøen Oceanarium
Nordsomuseet in Hirtshals, Denmark.jpg
Date opened 1998
Location Hirtshals, Denmark
Coordinates 57°35′12″N9°58′48″E / 57.5866°N 9.9800°E / 57.5866; 9.9800 Coordinates: 57°35′12″N9°58′48″E / 57.5866°N 9.9800°E / 57.5866; 9.9800
No. of species 70 (fish only, not counting mammals and invertebrates) [1]
Volume of largest tank 4,500,000 litres (1,200,000 US gal) [2]
Website en.nordsoenoceanarium.dk

Nordsøen Oceanarium is a public aquarium and museum that opened in 1998 on the shores of the North Sea in Hirtshals, north Jutland, Denmark. Their main tank, which holds 4,500,000 litres (1,200,000 US gal), is the largest in Northern Europe, [2] but the Oceanarium also has several smaller habitat aquariums and an exhibit with seals. Species displayed are native to the oceans around Denmark.

Public aquarium facility with large tanks for water-dwelling species

A public aquarium is the aquatic counterpart of a zoo, which houses living aquatic animal and plant specimens for public viewing. Most public aquariums feature tanks larger than those kept by home aquarists, as well as smaller tanks. Since the first public aquariums were built in the mid-19th century, they have become popular and their numbers have increased. Most modern accredited aquariums stress conservation issues and educating the public.

Museum institution that holds artifacts and other objects of scientific, artistic, cultural, historical, or other importance

A museum is an institution that cares for (conserves) a collection of artifacts and other objects of artistic, cultural, historical, or scientific importance. Many public museums make these items available for public viewing through exhibits that may be permanent or temporary. The largest museums are located in major cities throughout the world, while thousands of local museums exist in smaller cities, towns and rural areas. Museums have varying aims, ranging from serving researchers and specialists to serving the general public. The goal of serving researchers is increasingly shifting to serving the general public.

North Sea marginal sea of the Atlantic Ocean

The North Sea is a marginal sea of the Atlantic Ocean located between the United Kingdom, Denmark, Norway, Sweden, Germany, the Netherlands, Belgium and France. An epeiric sea on the European continental shelf, it connects to the ocean through the English Channel in the south and the Norwegian Sea in the north. It is more than 970 kilometres (600 mi) long and 580 kilometres (360 mi) wide, with an area of 570,000 square kilometres (220,000 sq mi).

Contents

The Oceanarium is part of the Nordsøcentre, which also houses a conference centre.

History

The Oceanarium was opened in 1998. It was destroyed by fire in December 2003 and reopened in July 2005.

Exhibits

The centre tank in the oceanarium Nordsoemuseet.jpg
The centre tank in the oceanarium

The centre tank

The large elliptical tank in the centre of the museum's old building measures 22 by 33 metres (72 by 108 ft) and holds 4,500,000 litres (1,200,000 US gal) of water. [2] The centre tank was designed to resemble the open sea in the North Sea, and specially to hold schooling, pelagic fish. [2] It is also a "show-room" for displaying large specimens of some of the species which are also seen in the habitat tanks – for example cod, saithe, turbot and sea-bass. Other large species in the tank are spiny dogfish, skates, and ocean sunfish. In total, there are about 2–3000 fish in this tank. [2]

Shoaling and schooling

In biology, any group of fish that stay together for social reasons are shoaling, and if the group is swimming in the same direction in a coordinated manner, they are schooling. In common usage, the terms are sometimes used rather loosely. About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives.

Pelagic fish Fish living in the pelagic zone of ocean or lake waters – being neither close to the bottom nor near the shore

Pelagic fish live in the pelagic zone of ocean or lake waters – being neither close to the bottom nor near the shore – in contrast with demersal fish, which do live on or near the bottom, and reef fish, which are associated with coral reefs.

Atlantic cod benthopelagic fish of the family Gadidae

The Atlantic cod is a benthopelagic fish of the family Gadidae, widely consumed by humans. It is also commercially known as cod or codling. Dry cod may be prepared as unsalted stockfish, as cured salt cod or clipfish.

Habitat tanks

Twelve tanks, varying in size from 4,000 to 16,000 litres (1,100 to 4,200 US gal), present different habitats from the North Sea - from the sandy bottom by the jetties to the muddy seafloor at several hundred metres in the Norwegian Trench between Denmark and Norway.

In each tank fish and other sea animals which can be found in that particular habitat are shown. The oceanarium tries to make the bottom and the surroundings as authentic as possible, however with the appropriate compromises.

Theme tanks

In addition to the centre tank and habitat tanks the oceanarium has a large number of theme-tanks with fish or other marine animals, which may contain animals which are impossible to show in other tanks, or animals subject to special theme exhibitions; an example would be the exhibition "Creepy Crawlies". Here the oceanarium presents different invertebrates. With special "bio-scanners", visitors are able to see details of the animals not possible with the naked eye.

Invertebrate Animals without a vertebrate column

Invertebrates are animals that neither possess nor develop a vertebral column, derived from the notochord. This includes all animals apart from the subphylum Vertebrata. Familiar examples of invertebrates include arthropods, mollusks, annelids, and cnidarians.

Other theme-tanks contain small fish found in shallow water. In the Activity area there are tanks which staff biologists use for demonstrations.

Sealarium

In the Oceanarium's large outdoor seal pool, the Sealarium, visitors can get close to the two seal species common in Danish waters – the harbour seal and the grey seal. The Sealarium contains 800,000 litres (210,000 US gal) of seawater which is continually renewed. [3]

Grey seal species of seal

The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae which are commonly referred to as "true seals" or "earless seals". It is the only species classified in the genus Halichoerus. Its name is spelled gray seal in the US; it is also known as Atlantic seal and the horsehead seal.

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References

  1. Nordjyllands Trafikselskab: Nordsøen Oceanarium. Retrieved 8 December 2012
  2. 1 2 3 4 5 Nordsøen Oceanarium: The Open Sea. Archived 2015-07-05 at the Wayback Machine . Retrieved 8 December 2012.
  3. Nordsøen Oceanarium: Seal Colony Limfjorden. Retrieved 8 December 2012.