Herring

Source: Wikipedia, the free encyclopedia.
Herring
FAO 1950–2010[1]

Herring are forage fish, mostly belonging to the family of Clupeidae.

Herring often move in large

North Atlantic Oceans, including the Baltic Sea, as well as off the west coast of South America. Three species of Clupea (the type genus of the herring family Clupeidae) are recognised, and comprise about 90% of all herrings captured in fisheries. The most abundant of these species is the Atlantic herring, which comprises over half of all herring capture. Fish called herring are also found in the Arabian Sea, Indian Ocean, and Bay of Bengal
.

Herring played an important role in the history of marine fisheries in Europe,

food fish, and are often salted, smoked, or pickled
.

Herring are also known as "silver darlings".[6]

Species

A number of different species, most belonging to the family Clupeidae, are commonly referred to as herrings. The origins of the term "herring" is somewhat unclear, though it may derive from the same source as the Old High German heri meaning a "host, multitude", in reference to the large schools they form.[7]

The type genus of the herring family Clupeidae is Clupea.[4] Clupea contains only two species: the Atlantic herring (the type species) found in the North Atlantic, and the Pacific herring mainly found in the North Pacific. Subspecific divisions have been suggested for both the Atlantic and Pacific herrings, but their biological basis remains unclear.

Herrings in the genus Clupea
Common name Scientific name Maximum
length
Common
length
Maximum
weight
Maximum
age
Trophic
level
Fish
Base
FAO
ITIS
IUCN status
Atlantic herring Clupea harengus Linnaeus, 1758 45.0 cm 30.0 cm 1.05 kg 22 years 3.23 [8] [9] [10] LC IUCN 3 1.svg Least concern[11]
Pacific herring Clupea pallasii Valenciennes, 1847 46.0 cm 25.0 cm 19 years 3.15 [8] [12] [13] DD IUCN 3 1.svg Data deficient[14]

In addition, a number of related species, all in the Clupeidae, are commonly referred to as herrings. The table immediately below includes those members of the family Clupeidae referred to by FishBase as herrings which have been assessed by the International Union for Conservation of Nature.

Other herrings in the family Clupeidae
Group Common name Scientific name Maximum
length
Common
length
Maximum
weight
Maximum
age
Trophic
level
Fish
Base
FAO
ITIS
IUCN status
Freshwater herrings Toothed river herring Clupeoides papuensis (Ramsay & Ogilby, 1886) cm cm kg years [15] [16] DD IUCN 3 1.svg Data deficient[17]
Round herrings
Day's round herring Dayella malabarica (Day, 1873) cm cm kg years [18] [19] LC IUCN 3 1.svg Least concern[20]
Dwarf round herring Jenkinsia lamprotaenia (Gosse, 1851) cm cm kg years [21] [22] LC IUCN 3 1.svg Least concern[23]
Gilchrist's round herring
Gilchristella aestuaria (Gilchrist, 1913 cm cm kg years [24] [25] LC IUCN 3 1.svg Least concern[26]
Little-eye round herring Jenkinsia majua Whitehead, 1963 cm cm kg years [27] [28] LC IUCN 3 1.svg Least concern[29]
Red-eye round herring
Etrumeus sadina (Mitchill, 1814) 33 cm 25 cm kg years [30] [31] [32] LC IUCN 3 1.svg Least concern[33]
Two-finned round herring Spratellomorpha bianalis (Bertin, 1940) 4.5 cm cm kg years 3.11 [34] [35] DD IUCN 3 1.svg Data deficient[36]
Whitehead's round herring Etrumeus whiteheadi (Wongratana, 1983) 20 cm cm kg years 3.4 [37] [38] [39] LC IUCN 3 1.svg Least concern[40]
Venezuelan herring Jenkinsia parvula Cervigón and Velasquez, 1978 cm cm kg years [41] [42] VU IUCN 3 1.svg Vulnerable[43]
Thread herrings Galapagos thread herring Opisthonema berlangai (Günther, 1867) 26 cm 18 cm kg years 3.27 [44] [45] VU IUCN 3 1.svg Vulnerable[46]
Middling thread herring Opisthonema medirastre Berry & Barrett, 1963 cm cm kg years [47] [48] LC IUCN 3 1.svg Least concern[49]
Pacific thread herring Opisthonema libertate (Günther, 1867) 30 cm 22 cm kg years [50] [51] [45] LC IUCN 3 1.svg Least concern[40]
Slender thread herring Opisthonema bulleri (Regan, 1904) cm cm kg years [52] [53] LC IUCN 3 1.svg Least concern[54]
Other Araucanian herring Strangomera bentincki (Norman, 1936) 28.4 cm cm kg years 2.69 [55] [56] [57] LC IUCN 3 1.svg Least concern[58]
Blackstripe herring Lile nigrofasciata Castro-Aguirre Ruiz-Campos and Balart, 2002 cm cm kg years [59] [60] LC IUCN 3 1.svg Least concern[61]
Denticle herring Denticeps clupeoides Clausen, 1959 cm cm kg years [62] [63] VU IUCN 3 1.svg Vulnerable[64]
Dogtooth herring Chirocentrodon bleekerianus (Poey, 1867) cm cm kg years [65] [66] LC IUCN 3 1.svg Least concern[67]
Graceful herring Lile gracilis Castro-Aguirre and Vivero, 1990 cm cm kg years [68] [69] LC IUCN 3 1.svg Least concern[70]
Pacific Flatiron herring Harengula thrissina (Jordan and Gilbert, 1882) cm cm kg years [71] [72] LC IUCN 3 1.svg Least concern[73]
Sanaga pygmy herring Thrattidion noctivagus Roberts, 1972 cm cm kg years [74] [75] LC IUCN 3 1.svg Least concern[76]
Silver-stripe round herring Spratelloides gracilis (Temminck & Schlegel, 1846) 10.5 cm cm kg years 3.0 [77] [78] LC IUCN 3 1.svg Least concern[79]
Striped herring Lile stolifera (Jordan & Gilbert, 1882) cm cm kg years [80] [81] LC IUCN 3 1.svg Least concern[82]
West African pygmy herring Sierrathrissa leonensis Thys van den Audenaerde, 1969 cm cm kg years [83] [84] LC IUCN 3 1.svg Least concern[85]

Also, a number of other species are called herrings, which may be related to clupeids or just share some characteristics of herrings (such as the

salmonid
). Just which of these species are called herrings can vary with locality, so what might be called a herring in one locality might be called something else in another locality. Some examples:

Other fishes called herring
Common name Scientific name Maximum
length
Common
length
Maximum
weight
Maximum
age
Trophic
level
Fish
Base
FAO
ITIS
IUCN status
Longfin herring Bigeyed longfin herring Opisthopterus macrops (Günther, 1867) cm cm kg years [86] [87] LC IUCN 3 1.svg Least concern[88]
Dove's longfin herring Opisthopterus dovii (Günther 1868) cm cm kg years [89] [90] LC IUCN 3 1.svg Least concern[91]
Hatchet herring Ilisha fuerthii (Steindachner, 1875) cm cm kg years [92] [93] LC IUCN 3 1.svg Least concern[94]
Panama longfin herring Odontognathus panamensis (Steindachner, 1876) cm cm kg years [95] [96] LC IUCN 3 1.svg Least concern[97]
Tropical longfin herring Neoopisthopterus tropicus (Hildebrand 1946) cm cm kg years [98] [99] LC IUCN 3 1.svg Least concern[100]
Vaqueira longfin herring Opisthopterus effulgens (Regan 1903) cm cm kg years [101] [102] VU IUCN 3 1.svg Vulnerable[103]
Equatorial longfin herring Opisthopterus equatorialis Hildebrand, 1946 cm cm kg years [104] [105] LC IUCN 3 1.svg Least concern[106]
Wolf herring
Dorab wolf-herring Chirocentrus dorab (Forsskål, 1775) 100 cm 60 cm kg years 4.50 [107] [108] [109] LC IUCN 3 1.svg Least concern[110]
Whitefin wolf-herring Chirocentrus nudus Swainson, 1839 100 cm cm 0.41 kg years 4.19 [111] [112] LC IUCN 3 1.svg Least concern[113]
Freshwater whitefish
Lake herring
(cisco)
Coregonus artedi Lesueur, 1818 cm cm kg years [114] [115] LC IUCN 3 1.svg Least concern[116]

Characteristics

The species of Clupea belong to the larger family Clupeidae (herrings,

Baltic herring (Clupea harengus membras) is small, 14 to 18 cm (about 5.5 to 7 inches); the proper Atlantic herring (Clupea harengus harengus) can grow to about 46 cm (18 in) and weigh up 700 g (1.5 lb); and Pacific herring
grow to about 38 cm (15 in).

Life cycle

Herring spawn

At least one stock of Atlantic herring spawns in every month of the year. Each spawns at a different time and place (spring, summer, autumn, and winter herrings). Greenland populations spawn in 0–5 metres (0–16 feet) of water, while North Sea (bank) herrings spawn at down to 200 m (660 ft) in autumn. Eggs are laid on the sea bed, on rock, stones, gravel, sand or beds of algae. Females may deposit from 20,000 to 40,000 eggs, according to age and size, averaging about 30,000. In sexually mature herring, the genital organs grow before spawning, reaching about one-fifth of its total weight.

The eggs sink to the bottom, where they stick in layers or clumps to gravel, seaweed, or stones, by means of their mucous coating, or to any other objects on which they chance to settle.

If the egg layers are too thick they suffer from oxygen depletion and often die, entangled in a maze of

currents
. Survival is highest in crevices and behind solid structures, because predators feast on openly exposed eggs. The individual eggs are 1 to 1.4 mm (364 to 116 in) in diameter, depending on the size of the parent fish and also on the local race. Incubation time is about 40 days at 3 °C (37 °F), 15 days at 7 °C (45 °F), or 11 days at 10 °C (50 °F). Eggs die at temperatures above 19 °C (66 °F).

The larvae are 5 to 6 mm (316 to 14 in) long at hatching, with a small yolk sac that is absorbed by the time the larvae reach 10 mm (1332 in). Only the eyes are well pigmented. The rest of the body is nearly transparent, virtually invisible under water and in natural lighting conditions.

The dorsal fin forms at 15 to 17 mm (1932 to 2132 in), the anal fin at about 30 mm (1+316 in)—the ventral fins are visible and the tail becomes well forked at 30 to 35 mm (1+38 in)— at about 40 mm (1+916 in), the larva begins to look like a herring.

Herring larvae are very slender and can easily be distinguished from all other young fish of their range by the location of the vent, which lies close to the base of the tail; however, distinguishing clupeoids one from another in their early stages requires critical examination, especially telling herring from sprats.

At one year, they are about 10 cm (4 in) long, and they first spawn at three years.

Egg to juvenile
swimbladder
, and the heart.

Ecology

Prey

Herrings consume

mysids, and krill in the pelagic zone. Conversely, they are a central prey item or forage fish for higher trophic levels. The reasons for this success are still enigmatic; one speculation attributes their dominance to the huge, extremely fast cruising schools
they inhabit.

Herring feed on phytoplankton, and as they mature, they start to consume larger organisms. They also feed on zooplankton, tiny animals found in oceanic surface waters, and small fish and fish larvae. Copepods and other tiny crustaceans are the most common zooplankton eaten by herring. During daylight, herring stay in the safety of deep water, feeding at the surface only at night when the chance of being seen by predators is less. They swim along with their mouths open, filtering the plankton from the water as it passes through their gills. Young herring mostly hunt copepods individually, by means of "particulate feeding" or "raptorial feeding",[117] a feeding method also used by adult herring on larger prey items like krill. If prey concentrations reach very high levels, as in microlayers, at fronts, or directly below the surface, herring become filter feeders, driving several meters forward with wide open mouth and far expanded opercula, then closing and cleaning the gill rakers for a few milliseconds.

Copepods, the primary zooplankton, are a major item on the forage fish menu. Copepods are typically 1–2 mm (132332 in) long, with a teardrop-shaped body. Some scientists say they form the largest animal

ram feeding
. In the photo below, herring ram feed on a school of copepods. They swim with their mouths wide open and their operculae fully expanded.

Hunting copepods
ram feeding on a school of copepods with opercula and mouth expanded: The fish swim in a grid with a distance of the jump length of their prey, as indicated by the animation at the right.

The fish swim in a grid where the distance between them is the same as the jump length of their prey, as indicated in the animation above right. In the animation, juvenile herring hunt the copepods in this synchronised way. The copepods sense with their antennae the pressure wave of an approaching herring and react with a fast escape jump. The length of the jump is fairly constant. The fish align themselves in a grid with this characteristic jump length. A copepod can dart about 80 times before it tires. After a jump, it takes it 60 milliseconds to spread its antennae again, and this time delay becomes its undoing, as the almost endless stream of herring allows a herring to eventually snap up the copepod. A single juvenile herring could never catch a large copepod.[117]

Other pelagic prey eaten by herring includes fish eggs, larval

Meganyctiphanes norvegica
.

Herrings, along with

vertical migration in the Baltic Sea, where they compete for the limited zooplankton available and necessary for their survival.[121] Sprat are highly selective in their diet and eat only zooplankton, while herring are more eclectic, adjusting their diet as they grow in size.[121] In the Baltic, copepods of the genus Acartia can be present in large numbers. However, they are small in size with a high escape response, so herring and sprat avoid trying to catch them. These copepods also tend to dwell more in surface waters, whereas herring and sprat, especially during the day, tend to dwell in deeper waters.[121]

Predators

Seabirds, like this European herring gull, attack herring schools from above.
lunging
from below.

Fishermen
also catch and eat herring.

The predators often cooperate in groups, using different techniques to panic or herd a school of herring into a tight bait ball. Different predatory species then use different techniques to pick the fish off in the bait ball. The sailfish raises its sail to make it appear much larger. Swordfish charge at high speed through the bait balls, slashing with their swords to kill or stun prey. They then turn and return to consume their "catch". Thresher sharks use their long tails to stun the shoaling fish. These sharks compact their prey school by swimming around them and splashing the water with their tails, often in pairs or small groups. They then strike them sharply with the upper lobe of their tails to stun them.[122] Spinner sharks charge vertically through the school, spinning on their axes with their mouths open and snapping all around. The sharks' momentum at the end of these spiraling runs often carries them into the air.[123][124]

Some whales

lunge feed on bait balls.[125] Lunge feeding is an extreme feeding method, where the whale accelerates from below the bait ball to a high velocity and then opens its mouth to a large gape angle. This generates the water pressure required to expand its mouth and engulf and filter a huge amount of water and fish. Lunge feeding by rorquals, a family of huge baleen whales that includes the blue whale, is said to be the largest biomechanical event on Earth.[126]

Fisheries

↑  All herrings 2010[1]
Green = Clupea herrings

Adult herring are harvested for their flesh and eggs, and they are often used as baitfish. The trade in herring is an important sector of many economies around the world. In Europe, the fish has been called the "silver of the sea", and its trade has been so significant to many countries that it has been regarded as the most commercially important fishery in history.[127]

Purse seining
for herring in southeast Alaska

As food

A kipper or split smoked herring

Herring has been a staple food source since at least 3000 BC. The fish is served numerous ways, and many regional recipes are used: eaten raw, fermented, pickled, or cured by other techniques, such as being smoked as kippers.

Herring are very high in the long-chain omega-3 fatty acids EPA and DHA.[128] They are a source of vitamin D.[129]

Water pollution influences the amount of herring that may be safely consumed. For example, large Baltic herring slightly exceeds recommended limits with respect to PCB and dioxin, although some sources point out that the cancer-reducing effect of omega-3 fatty acids is statistically stronger than the carcinogenic effect of PCBs and dioxins.[130] The contaminant levels depend on the age of the fish which can be inferred from their size. Baltic herrings larger than 17 cm (6.7 in) may be eaten twice a month, while herrings smaller than 17 cm can be eaten freely.[131] Mercury in fish also influences the amount of fish that women who are pregnant or planning to be pregnant within the next one or two years may safely eat.

History

The herring has played a highly significant role in history both socially and economically. During the Middle Ages, herring prompted the founding of Great Yarmouth and Copenhagen and played a critical role in the medieval development of Amsterdam.[132] In 1274, while on his deathbed at the monastery of Fossanova (south of Rome, Italy), when encouraged to eat something to regain his strength, Thomas Aquinas asked for fresh herring.[133]

See also

References

Citations

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Sources

Further reading

External links