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Nasonov Scent Gland
Nasonov's gland produces a pheromone used in recruitment in worker honeybees. The pheromone can serve the purposes of attracting workers to a settled swarm and draw bees who have lost their way back to the hive. It is used to recruit workers to food that lacks a characteristic scent and lead bees to water sources. The gland is located on the dorsal side of the abdomen. Its opening is located at the base of the last tergite at the tip of the abdomen. The gland was first described in 1882 by the Russian zoologist Nikolai Viktorovich Nasonov (February 14, 1855 – February 11, 1939). Nasonov thought that the gland performed perspiration; it was Frederick William Lambert Sladen (May 30, 1876 - 1921) of England who in 1901 first proposed that the gland produced a pheromone.See: * (Snodgrass, 1925), p. 116. * * Republished in condensed form in: * Reprinted in: See also *Nasonov pheromone The Nasonov (alternatively, Nasanov) pheromone is released by worker bees to orient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pheromone
A pheromone () is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to affect the behavior of the receiving individuals. There are ''alarm signal, alarm pheromones'', ''food trail pheromones'', ''sex pheromones'', and many others that affect behavior or physiology. Pheromones are used by many organisms, from basic unicellular prokaryotes to complex multicellular eukaryotes. Their use among insects has been particularly well documented. In addition, some vertebrates, plants and ciliates communicate by using pheromones. The ecological functions and evolution of pheromones are a major topic of research in the field of chemical ecology. Background The portmanteau word "pheromone" was coined by Peter Karlson and Martin Lüscher in 1959, based on the Greek language, Greek () and (). Pheromones are also sometimes classified as ec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recruitment
Recruitment is #Process, the overall process of identifying, sourcing, screening, shortlisting, and interviewing candidates for Job (role), jobs (either permanent or temporary) within an organization. Recruitment also is the process involved in choosing people for Unpaid work, unpaid roles. Management, Managers, human resource generalists, and recruitment specialists may be tasked with carrying out recruitment, but in some cases, Public sector, public-sector employment, commercial Employment agency, recruitment agencies, or specialist search consultancies such as Executive search in the case of more senior roles, are used to undertake parts of the process. Internet-based recruitment is now widespread, including the use of Artificial intelligence in hiring, artificial intelligence (AI). Process The recruitment process varies widely based on the employer, seniority and type of role and the industry or sector the role is in. Some recruitment processes may include; * Job analysis f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honeybees
A honey bee (also spelled honeybee) is a eusocial flying insect within the genus ''Apis'' of the bee clade, all native to mainland Afro-Eurasia. After bees spread naturally throughout Africa and Eurasia, humans became responsible for the current cosmopolitan distribution of honey bees, introducing multiple subspecies into South America (early 16th century), North America (early 17th century), and Australia (early 19th century). Honey bees are known for their construction of wiktionary:perennial, perennial Colony (biology), colonial nests from Beeswax, wax, the large size of their colonies, and surplus production and storage of honey, distinguishing their hives as a prized foraging target of many animals, including honey badgers, bears and human hunter-gatherers. Only 8 surviving species of honey bees are recognized, with a total of 43 subspecies, though historically 7 to 11 species are recognized. Honey bees represent only a small fraction of the roughly 20,000 known species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beehive
A beehive is an enclosed structure which houses honey bees, subgenus '' Apis.'' Honey bees live in the beehive, raising their young and producing honey as part of their seasonal cycle. Though the word ''beehive'' is used to describe the nest of any bee colony, scientific and professional literature distinguishes ''nest'' from ''hive''. ''Nest'' is used to discuss colonies that house themselves in natural or artificial cavities or are hanging and exposed. The term ''hive'' is used to describe a manmade structure to house a honey bee nest. Several species of ''Apis'' live in colonies. But for honey production, the western honey bee (''Apis mellifera'') and the eastern honey bee (''Apis cerana'') are the main species kept in hives. The nest's internal structure is a densely packed group of hexagonal prismatic cells made of beeswax, called a honeycomb. The bees use the cells to store food (honey and pollen) and to house the brood (eggs, larvae, and pupae). Beehives serve several ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdomen
The abdomen (colloquially called the gut, belly, tummy, midriff, tucky, or stomach) is the front part of the torso between the thorax (chest) and pelvis in humans and in other vertebrates. The area occupied by the abdomen is called the abdominal cavity. In arthropods, it is the posterior (anatomy), posterior tagma (biology), tagma of the body; it follows the thorax or cephalothorax. In humans, the abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the pelvic brim. The pelvic brim stretches from the lumbosacral joint (the intervertebral disc between Lumbar vertebrae, L5 and Vertebra#Sacrum, S1) to the pubic symphysis and is the edge of the pelvic inlet. The space above this inlet and under the thoracic diaphragm is termed the abdominal cavity. The boundary of the abdominal cavity is the abdominal wall in the front and the peritoneal surface at the rear. In vertebrates, the abdomen is a large body cavity enclosed by the abdominal muscles, at the front an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tergum
A ''tergum'' (Latin for "the back"; : ''terga'', associated adjective tergal) is the dorsal ('upper') portion of an arthropod Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metam ... segment other than the head. The anterior edge is called the 'base' and posterior edge is called the 'apex' or 'margin'. A given tergum may be divided into hardened plates or sclerites commonly referred to as tergites. In a thoracic segment, for example, the tergum may be divided into an anterior notum and a posterior scutellum. Lateral extensions of a tergite are known as paranota (Greek for "alongside the back") or ''carinae'' (Latin for "keel"), exemplified by the flat-backed millipedes of the order Polydesmida. Kinorhynchs have tergal and sternal plates too, though seemingly not homologous with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolai Nasonov
Nikolai Viktorovich Nasonov (; 14 February 1855 – 11 February 1939) was a Russian and Soviet zoologist. In 1879 he graduated from the Imperial Moscow University and became an assistant at its Zoological Museum. After defending his PhD in 1887 he lectured at his alma mater, and later worked in Trieste, Marseille and Warsaw. In 1890 he defended a habilitation on the evolution of ants. In December 1897 he was elected as a corresponding and in March 1906 as a full member of the Russian Academy of Sciences. In addition to his studies in zoology Nasonov also dealt with the race problem based on Marxism and published articles in '' Revolutsionnyi vostok'', a monthly journal published by the Communist University of the Toilers of the East. His articles criticized the approach of Endre Sík Endre Sík (2 April 1891 – 10 April 1978) was a Hungarian historian, politician, Minister of Foreign Affairs between 1958 and 1961. He was the younger brother of the priest Sándor Sík who was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nasonov Pheromone
The Nasonov (alternatively, Nasanov) pheromone is released by worker bees to orient returning forager bees back to the colony. To broadcast this scent, bees raise their abdomens, which contain the Nasonov glands, and fan their wings vigorously. Nasonov includes a number of different terpenoids including geraniol, nerolic acid, citral and geranic acid. Bees use these to find the entrance to their colony or hive, and they release them on flowers so other bees know which flowers have nectar. Once the foraging bee leaves the nest it uses its sense from special sensing cells on the antennae to locate and distinguish forage plants, which each give off a unique blend of odour chemicals. When a beekeeper lifts out frames from a hive they disturb the balance of smells within the hive. It can take up to 48 hours for the colony to re-establish its scent equilibrium. A synthetically produced Nasonov pheromone can be used to attract a honey bee swarm to an unoccupied hive or a swarm-catch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bees
Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are currently considered a clade, called Anthophila. There are over 20,000 known species of bees in seven recognized biological families. Some speciesincluding honey bees, bumblebees, and stingless beeslive socially in colonies while most species (>90%)including mason bees, carpenter bees, leafcutter bees, and sweat beesare solitary. Bees are found on every continent except Antarctica, in every habitat on the planet that contains insect-pollinated flowering plants. The most common bees in the Northern Hemisphere are the Halictidae, or sweat bees, but they are small and often mistaken for wasps or flies. Bees range in size from tiny stingless bee species, whose workers are less than long, to the leafcutter bee '' Megach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insect Anatomy
Insect morphology is the study and description of the physical form of insects. The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), three pairs of legs, and mouthparts located ''outside'' of the head capsule. This position of the mouthparts divides them from their closest relatives, the non-insect hexapods, which include Protura, Diplura, and Collembola. There is enormous variation in body structure amongst insect species. Individuals can range from 0.3 mm ( fairyflies) to 30 cm across ( great owlet moth); have no eyes or many; well-developed wings or none; and legs modified for running, jumping, swimming, or even digging. These modifications allow insects to occupy almost every ecological niche except the deep ocean. This article describe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod Glands
Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated ( metameric) segments, and paired jointed appendages. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. They form an extremely diverse group of up to ten million species. Haemolymph is the analogue of blood for most arthropods. An arthropod has an open circulatory system, with a body cavity called a haemocoel through which haemolymph circulates to the interior organs. Like their exteriors, the internal organs of arthropods are generally built of repeated segments. They have ladder-like nervous systems, with paired ventral nerve cords running through all segments and forming paired ganglia in each segment. Their heads are formed by fusion of varying numbers of segments, and their brains are formed by fusion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
