Joined in 2023 
82 
63 About this deal
These changes are examples of phase polyphenism; they were first analysed and described by Boris Uvarov, who was instrumental in setting up the Anti-Locust Research Centre. [10] He made his discoveries during his studies of the migratory locust in the Caucasus, whose solitary and gregarious phases had previously been thought to be separate species ( Locusta migratoria and L. danica L.). He designated the two phases as solitaria and gregaria. [11] These are also referred to as statary and migratory morphs, though strictly speaking, their swarms are nomadic rather than migratory. Charles Valentine Riley and Norman Criddle were also involved in achieving the understanding and control of locusts. [12] [13] To understand how the raids are structured and organized, the team collected a large number of video recordings of many colonies raiding under controlled conditions.
Majd, Hooman (23 September 2008). The Ayatollah Begs to Differ: The paradox of modern Iran. Knopf Doubleday Publishing Group. pp.165ff. ISBN 978-0-385-52842-9. Normally, these grasshoppers are innocuous, their numbers are low, and they do not pose a major economic threat to agriculture. However, under suitable conditions of drought followed by rapid vegetation growth, serotonin in their brains triggers dramatic changes: they start to breed abundantly, becoming gregarious and nomadic (loosely described as migratory) when their populations become dense enough. They form bands of wingless nymphs that later become swarms of winged adults. Both the bands and the swarms move around, rapidly strip fields, and damage crops. The adults are powerful fliers; they can travel great distances, consuming most of the green vegetation wherever the swarm settles. [3] Subfamily Dorylinae (Aenictinae, Aenictogitoninae, Cerapachyinae, Ecitoninae and Leptanilloidinae, 2014) [39] The concept of migratory connectivity is much less frequently applied to insects, with the exception of the monarch butterfly ( Danaus plexippus) in North America [ 8, 9, 10, 11, 12]. Here we consider how, and to what extent, the connectivity framework is applicable to a variety of long-range insect migrants that undertake population movements traversing hundreds or even thousands of kilometers during their annual cycles (i.e., over spatial scales similar to those considered in the context of vertebrate migratory connectivity). However, if we wish to apply the migratory connectivity paradigm to insects, we need to consider three respects in which insect migrations differ in important ways to bird migrations, which we discuss in turn below. Probably the most common pattern is that collective behavior evolves via natural selection acting on and tweaking the interaction rules that the individual animals follow," said Kronauer. "But our study is a nice example of a different mechanism: scaling effects associated with group size can give you dramatically different outcomes in terms of collective behavior, even though the individual rules don't change much."The name army ant (or legionary ant or marabunta [1]) is applied to over 200 ant species in different lineages. Because of their aggressive predatory foraging groups, known as "raids", a huge number of ants forage simultaneously over a limited area. [2] This article is about the insects in the family Acrididae. For other uses, see Locust (disambiguation).
a b c Couzin, Iain D.; Franks, Nigel R. (2003). "Self-organized lane formation and optimized traffic flow in army ants". Proceedings of the Royal Society B: Biological Sciences. 270 (1511): 139–146. doi: 10.1098/rspb.2002.2210. PMC 1691225. PMID 12590751.
Synonyms for ARMY ANT
a b c d Krall, S.; Peveling, R.; Diallo, B.D. (1997). New Strategies in Locust Control. Springer Science & Business Media. pp.453–454. ISBN 978-3-7643-5442-8. a b c Showler, Allan T. (2008). "Desert locust, Schistocerca gregaria Forskål (Orthoptera: Acrididae) plagues". In John L. Capinera (ed.). Encyclopedia of Entomology. Springer. pp.1181–1186. ISBN 978-1-4020-6242-1. Determined movement away from the current home range - In other words, if it looks like a migration, it probably is a migration. Migrating insects move with a mission, making persistent progress away from their existing range and toward a new one.
Locusts have formed plagues since prehistory. The ancient Egyptians carved them on their tombs and the insects are mentioned in the Iliad, the Mahabharata, the Bible and Quran. [4] Swarms have devastated crops and have caused famines and human migrations. More recently, changes in agricultural practices and better surveillance of locust breeding grounds have allowed control measures at an early stage. Traditional locust control uses insecticides from the ground or air, but newer biological control methods are proving effective.Stevenson, P. A. (2009). "The key to Pandora's box". Science. 323 (5914): 594–595. doi: 10.1126/science.1169280. PMID 19179520. S2CID 39306643. The locust is large and easy to breed and rear, and is used as an experimental model in research studies. It has been used in evolutionary biology research and to test the generalizability of conclusions reached about test organisms such as the fruit fly ( Drosophila) and the housefly ( Musca). [57] [58] It is a suitable school laboratory animal because of its robustness and ease of breeding and handling. [59] The soldiers of army ants are larger than the workers, and they have much larger mandibles than the worker class of ants, with older soldiers possessing larger heads and stronger mandibles than the younger ones. They protect the colony, and help carry the heaviest loads of prey to the colony bivouac.
Great Deal 
New Comment