A hatchery is a facility where eggs are hatched under artificial conditions, especially those of fish or poultry. In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. ... A giant grouper at the Georgia Aquarium Fish are aquatic vertebrates that are typically cold-blooded; covered with scales, and equipped with two sets of paired fins and several unpaired fins. ... This article or section does not cite its references or sources. ...

Assynt Salmon Hatchery, near Inchnadamph in Scottish Highlands

Image File history File linksMetadata Download high-resolution version (2125x1700, 3172 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Hatchery Wikipedia:Scottish Wikipedians notice board/New images Metadata This file contains additional information, probably added from the... Image File history File linksMetadata Download high-resolution version (2125x1700, 3172 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Hatchery Wikipedia:Scottish Wikipedians notice board/New images Metadata This file contains additional information, probably added from the... Parish in West Sutherland, North West Highlands, Scotland, north of Ullapool. ... The Scottish Highlands are the mountainous regions of Scotland north and west of the Highland Boundary Fault. ...

Fish hatchery function

Fish hatcheries are used to cultivate and breed a large number of fish in an enclosed environment, typically involving manual labour. A hatchery worker will take a female fish, release her eggs (stripping), and then externally add the male fish's sperm (milt), mix them and allow them to fertilize and incubate undisturbed, where there is less risk of disease or predation. They can immediately dispose of any unfertilized eggs. What happens next depends on the purpose of the hatchery. Fish farms use hatcheries to cultivate fish to sell for food, or ornamental purposes, eliminating the need to find the fish in the wild and even providing some species outside of their natural season. They raise the fish until they are ready to be eaten or sold to aquarium stores. Other hatcheries release the juvenile fish into a river, lake or the ocean to support commercial, tribal, or recreational fishing or to supplement the natural numbers of threatened or endangered species. Some fish hatcheries are used to mitigate the effects of a facility, such as a dam, hydroelectric plant or water diversion. These hatcheries usually raise anadromous fish that are unable to migrate due to the obstruction, particularly salmon and steelhead. In 1889 a cod fish hatchery was erected on Dildo Island, Newfoundland. It was the largest in the world at that time and the first in North America. The ornamental fish industry uses fish hatcheries to produce fish for the aquarium fish trade, this has helped to limit the over harvesting of native fish populations both in fresh and salt water ecosystems. The signifier sperm can refer to: (mass noun, from Greek sperma = seed) a substance which consists of spermatozoa and which is a component of semen (mass noun) semen itself (informally, count noun with plural sperm or sperms) a single spermatozoon (= sperm cell) sperma ceti (Latin ceti, genitive of cetus = whale... Categories: Biology stubs ... The word incubate in the context of birds refers to the development of the chick (embryo) within the egg and the constant temperature required for the development of it over a specific period. ... A hawk consuming its prey, a small rodent. ... A demonstration aquaculture facility Fish farming is the principal form of aquaculture. ... Fishing is the activity of hunting for fish by hooking, trapping, or gathering animals not classifiable as insects which breathe in water or pass their lives in water. ... Threatened species refers to animal and plant species under a serious, but perhaps not imminent, threat of extinction. ... The critically endangered Amur Tiger, a rare subspecies of tiger. ... ... Scrivener Dam, in Canberra, Australia, was engineered to withstand a once-in-5000-years flood A dam is a barrier across flowing water that obstructs, directs or retards the flow, often creating a reservoir, lake or impoundment. ... Hydroelectric dam diagram The waters of Llyn Stwlan, the upper reservoir of the Ffestiniog Pumped-Storage Scheme in north Wales, can just be glimpsed on the right. ... Many types of fish undertake migrations on a regular basis, on time scales ranging from daily to annual, and with distances ranging from a few meters to thousands of kilometers. ... Illustration of a male Coho Salmon The Chinook or King Salmon is the largest salmon in North America and can grow to 1. ... Binomial name Oncorhynchus mykiss Walbaum, 1792 The Rainbow Trout (Oncorhynchus mykiss), also called steelhead trout, is a single species of trout native to the Pacific Ocean and in North American rivers and lakes west of the Rocky Mountains. ... This way to Dildo, Newfoundland. ... World map showing North America A satellite composite image of North America. ...

Disadvantages of fish hatcheries

Originally devised to supply the growing demand for recreational fishing from an expanding human population, fish hatcheries often release juveniles into an environment which is not well suited for the genetic composition of the released species. This mismatch can create more of a long term problem for species survival, in spite of a short term surge in local population. Thus fish hatcheries in many cases may provide more net harm than good, even though the intent is a positive one.^[1] Map of countries by population (See List of countries by population. ... Look up Genetic in Wiktionary, the free dictionary. ... Release may refer to multiple things: in marketing: issuing a product for sale or public showing (especially a music release or a film release). ...

Poultry hatchery function

Poultry hatcheries produce a majority of the birds consumed in the developed world including chickens, turkeys, ducks and some other minor bird species that are consumed. It is a multi billion dollar industry with highly regimented production systems used to maximize bird size verse feed consumed. Birds are produced and maintained under high density which makes production and harvesting more economical but can also generate problems such as the spread of pathogens, which can move very quickly through the population when animal densities are high. Poultry hatcheries generally start with artificially inseminated birds that lay eggs, the eggs are cleaned and checked for viable embryos and those eggs with good embryos are placed into incubators. The incubators control temperature and humidity and turn the eggs until they hatch. Generally large numbers of eggs are produced at one time so that the resulting birds are uniform in size and can be harvested at the same time. Once the eggs hatch and the chicks are a few days old they are often de-beaked and or de-toed, this involves the removal of half of the top beak and the clipping of the toe ends. This is down to prevent the birds from harming each other while they are living in close proximity to each other. After these procedures they are moved to enclosed buildings to be raised until harvest. This article or section does not cite its references or sources. ... A pathogen or infectious agent is a biological agent that causes disease or illness to its host. ... Viability means in general capacity for survival and is more specifically used to mean a capacity for living, developing, or germinating under favorable conditions. ... It has been suggested that embryology be merged into this article or section. ... The word incubation (from Latin incubare, to lie upon - cf. ...

Breeding mediocre hatchery birds into a show line that has poor production might be a way to restore that line’s production qualities. This will of course significantly alter the offspring, and the first few generations will probably not even be show worthy, but by continuing to select the better producing offspring to breed back into the show line, one might manage to breed a flock that have show qualities as well as preserving production qualities.

See also

• Endangered species
• Minimum Viable Population
• Inbreeding depression

The critically endangered Amur Tiger, a rare subspecies of tiger. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Inbreeding Depression is reduced fitness in a given population as a result of breeding of related individuals. ...

References

Princeton University is a coeducational private university located in Princeton, New Jersey, in the United States of America. ...

External links

• When does genetic diversity matter? - Talks about some issues surrounding hatcheries
• Hatcheries and the Protection of Wild Salmon
• University of Washington Libraries Digital Collections -- Digital Collections -- Fish Hatcheries An ongoing digital collection of images related to fish hatcheries.