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Ant colony
An ant colony is a population of ants, typically from a single species, capable of maintaining their complete lifecycle. Ant colonies are eusocial, communal, and efficiently organized and are very much like those found in other social Hymenoptera, though the various groups of these developed sociality independently through convergent evolution. The typical colony consists of one or more egg-laying queens, numerous sterile females (workers, soldiers) and, seasonally, many winged sexual males and females. In order to establish new colonies, ants undertake flights that occur at species-characteristic times of the day. Swarms of the winged sexuals (known as alates) depart the nest in search of other nests. The males die shortly thereafter, along with most of the females. A small percentage of the females survive to initiate new nests.
The term "ant colony" refers to a population of workers, reproductive individuals, and brood that live together, cooperate, and treat one another non-aggressively. Often this comprises the genetically related progeny from a single queen, although this is not universal across ants. The name "ant farm" is commonly given to ant nests that are kept in formicaria, isolated from their natural habitat. These formicaria are made by scientists to study by rearing or temporarily maintaining them. Another name is "formicary", which derives from the Medieval Latin word formīcārium. The word also derives from formica. "Ant nests" are the physical spaces in which the ants live. These can be underground, in trees, under rocks, or even inside a single acorn. The name "anthill" (or "ant hill") applies to aboveground nests where the workers pile sand or soil outside the entrance, forming a large mound.
Colony size (the number of individuals that make up the colony) is very important to ants: it can affect how they forage, how they defend their nests, how they mate, and even their physical appearances. Body size is often seen as the most important factor in shaping the natural history[clarification needed] of non-colonial organisms; similarly, colony size is key in influencing how colonial organisms are collectively organized. Colonies have a significant range of sizes: some are just several[clarification needed] ants living in a twig, while others are super-colonies with many millions of workers. Within a single ant colony, seasonal variation may be huge. For example, in the ant Dolichoderus mariae, one colony can shift from around 300 workers in the summer to over 2,000 workers per queen in the winter. Genetics and environmental factors can cause the variation among different colonies of a single species to be even bigger. Different ant species, even those in the same genus, may have enormous colony size disparities: Formica yessensis has colony sizes that are reported to be 306 million workers while Formica fusca colonies sometimes comprise only 500 workers.
A supercolony occurs when many ant colonies over a large area unite. They still continue to recognize genetic differences in order to mate, but the different colonies within the super colony avoid aggression. Until 2000, the largest known ant supercolony was on the Ishikari coast of Hokkaidō, Japan. The colony was estimated to contain 306 million worker ants and one million queen ants living in 45,000 nests interconnected by underground passages over an area of 2.7 km2 (670 acres). In 2000, an enormous supercolony of Argentine ants was found in Southern Europe (report published in 2002). Of 33 ant populations tested along the 6,004-kilometre (3,731 mi) stretch along the Mediterranean and Atlantic coasts in Southern Europe, 30 belonged to one supercolony with estimated millions of nests and billions of workers, interspersed with three populations of another supercolony. The researchers claim that this case of unicoloniality cannot be explained by loss of their genetic diversity due to the genetic bottleneck of the imported ants. In 2009, it was demonstrated that the largest Japanese, Californian and European Argentine ant supercolonies were in fact part of a single global "megacolony". Because of this there is little doubt that the Argentine intercontinental super colony represents the most populous known animal society.
Another supercolony, measuring approximately 100 km (62 mi) wide, was found beneath Melbourne, Australia in 2004.
The following terminology is commonly used among myrmecologists to describe the behaviors demonstrated by ants when founding and organizing colonies:
Ant colonies have a complex social structure. Ants' jobs are determined and can be changed by age. As ants grow older their jobs move them farther from the queen, or center of the colony. Younger ants work within the nest protecting the queen and young. Sometimes, a queen is not present and is replaced by egg-laying workers. These worker ants can only lay haploid eggs producing sterile offspring. Despite the title of queen, she does not delegate the tasks to the worker ants; however, the ants choose their tasks based on individual preference. Ants as a colony also work as a collective "super mind". Ants can compare areas and solve complex problems by using information gained by each member of the colony to find the best nesting site or to find food. Some social-parasitic species of ants, known as the slave-making ant, raid and steal larvae from neighboring colonies.
In ant colonies there can range from a few dozen to millions of ants so communication is very important, because of this ants have been known to communicate through something called odor trails or pheromone trails. These pheromone or odor trails are secreted by certain glands on an ants body though these glands and where they are located differ for each ant species. In general these animals are able to provide a positive and negative feedback with these pheromone trails, this is why ants are typically seen in a single file line going from point A to B. When a foraging ant is successful in finding food they will deposit their pheromone trail on the way back to their nest, the pheromone trail will get stronger as more ants tread it signaling there is still food to be had in that area and this is known as the positive feedback. On the other hand once all the food has been scavenged the trail will lose its strength as ants will no longer tread leaving their pheromones and in turn it will be like the pheromone trail never existed, this is known as the negative feedback.
Ant colony
An ant colony is a population of ants, typically from a single species, capable of maintaining their complete lifecycle. Ant colonies are eusocial, communal, and efficiently organized and are very much like those found in other social Hymenoptera, though the various groups of these developed sociality independently through convergent evolution. The typical colony consists of one or more egg-laying queens, numerous sterile females (workers, soldiers) and, seasonally, many winged sexual males and females. In order to establish new colonies, ants undertake flights that occur at species-characteristic times of the day. Swarms of the winged sexuals (known as alates) depart the nest in search of other nests. The males die shortly thereafter, along with most of the females. A small percentage of the females survive to initiate new nests.
The term "ant colony" refers to a population of workers, reproductive individuals, and brood that live together, cooperate, and treat one another non-aggressively. Often this comprises the genetically related progeny from a single queen, although this is not universal across ants. The name "ant farm" is commonly given to ant nests that are kept in formicaria, isolated from their natural habitat. These formicaria are made by scientists to study by rearing or temporarily maintaining them. Another name is "formicary", which derives from the Medieval Latin word formīcārium. The word also derives from formica. "Ant nests" are the physical spaces in which the ants live. These can be underground, in trees, under rocks, or even inside a single acorn. The name "anthill" (or "ant hill") applies to aboveground nests where the workers pile sand or soil outside the entrance, forming a large mound.
Colony size (the number of individuals that make up the colony) is very important to ants: it can affect how they forage, how they defend their nests, how they mate, and even their physical appearances. Body size is often seen as the most important factor in shaping the natural history[clarification needed] of non-colonial organisms; similarly, colony size is key in influencing how colonial organisms are collectively organized. Colonies have a significant range of sizes: some are just several[clarification needed] ants living in a twig, while others are super-colonies with many millions of workers. Within a single ant colony, seasonal variation may be huge. For example, in the ant Dolichoderus mariae, one colony can shift from around 300 workers in the summer to over 2,000 workers per queen in the winter. Genetics and environmental factors can cause the variation among different colonies of a single species to be even bigger. Different ant species, even those in the same genus, may have enormous colony size disparities: Formica yessensis has colony sizes that are reported to be 306 million workers while Formica fusca colonies sometimes comprise only 500 workers.
A supercolony occurs when many ant colonies over a large area unite. They still continue to recognize genetic differences in order to mate, but the different colonies within the super colony avoid aggression. Until 2000, the largest known ant supercolony was on the Ishikari coast of Hokkaidō, Japan. The colony was estimated to contain 306 million worker ants and one million queen ants living in 45,000 nests interconnected by underground passages over an area of 2.7 km2 (670 acres). In 2000, an enormous supercolony of Argentine ants was found in Southern Europe (report published in 2002). Of 33 ant populations tested along the 6,004-kilometre (3,731 mi) stretch along the Mediterranean and Atlantic coasts in Southern Europe, 30 belonged to one supercolony with estimated millions of nests and billions of workers, interspersed with three populations of another supercolony. The researchers claim that this case of unicoloniality cannot be explained by loss of their genetic diversity due to the genetic bottleneck of the imported ants. In 2009, it was demonstrated that the largest Japanese, Californian and European Argentine ant supercolonies were in fact part of a single global "megacolony". Because of this there is little doubt that the Argentine intercontinental super colony represents the most populous known animal society.
Another supercolony, measuring approximately 100 km (62 mi) wide, was found beneath Melbourne, Australia in 2004.
The following terminology is commonly used among myrmecologists to describe the behaviors demonstrated by ants when founding and organizing colonies:
Ant colonies have a complex social structure. Ants' jobs are determined and can be changed by age. As ants grow older their jobs move them farther from the queen, or center of the colony. Younger ants work within the nest protecting the queen and young. Sometimes, a queen is not present and is replaced by egg-laying workers. These worker ants can only lay haploid eggs producing sterile offspring. Despite the title of queen, she does not delegate the tasks to the worker ants; however, the ants choose their tasks based on individual preference. Ants as a colony also work as a collective "super mind". Ants can compare areas and solve complex problems by using information gained by each member of the colony to find the best nesting site or to find food. Some social-parasitic species of ants, known as the slave-making ant, raid and steal larvae from neighboring colonies.
In ant colonies there can range from a few dozen to millions of ants so communication is very important, because of this ants have been known to communicate through something called odor trails or pheromone trails. These pheromone or odor trails are secreted by certain glands on an ants body though these glands and where they are located differ for each ant species. In general these animals are able to provide a positive and negative feedback with these pheromone trails, this is why ants are typically seen in a single file line going from point A to B. When a foraging ant is successful in finding food they will deposit their pheromone trail on the way back to their nest, the pheromone trail will get stronger as more ants tread it signaling there is still food to be had in that area and this is known as the positive feedback. On the other hand once all the food has been scavenged the trail will lose its strength as ants will no longer tread leaving their pheromones and in turn it will be like the pheromone trail never existed, this is known as the negative feedback.
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