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90-609: Havelock Island , officially known as Swaraj Dweep ( transl.   Self-Rule Island ), is one of the largest islands in Ritchie's Archipelago , to the east of Great Andaman within the Andaman Islands . It belongs to the South Andaman administrative district , part of the Indian union territory of Andaman and Nicobar Islands . The island is 41 km (25 mi) northeast of

180-451: A black lining able to keep the light from any bioluminescent fish prey which they have swallowed from attracting larger predators. The sea-firefly is a small crustacean living in sediment. At rest it emits a dull glow but when disturbed it darts away leaving a cloud of shimmering blue light to confuse the predator. During World War II it was gathered and dried for use by the Japanese army as

270-640: A bright enough wake to be detected; a German submarine was sunk in the First World War , having been detected in this way. The Navy was interested in predicting when such detection would be possible, and hence guiding their own submarines to avoid detection. Among the anecdotes of navigation by bioluminescence is one recounted by the Apollo 13 astronaut Jim Lovell , who as a Navy pilot had found his way back to his aircraft carrier USS Shangri-La when his navigation systems failed. Turning off his cabin lights, he saw

360-401: A common ancestor. However, he found this hypothesis to be false, with different organisms having major differences in the composition of their light-producing proteins. He spent the next 30 years purifying and studying the components, but it fell to the young Japanese chemist Osamu Shimomura to be the first to obtain crystalline luciferin. He used the sea firefly Vargula hilgendorfii , but it

450-433: A long-lasting glow which the fish can control. The glowing esca is dangled or waved about to lure small animals to within striking distance of the fish. The cookiecutter shark uses bioluminescence to camouflage its underside by counter-illumination, but a small patch near its pectoral fins remains dark, appearing as a small fish to large predatory fish like tuna and mackerel swimming beneath it. When such fish approach

540-405: A majority are found in symbiotic relationships that involve fish, squids, crustaceans etc. as hosts. Most luminous bacteria inhabit the sea, dominated by Photobacterium and Vibrio . In the symbiotic relationship, bacterium benefit from having a source of nourishment and a refuge to grow. Hosts obtain these bacterial symbionts either from the environment, spawning , or the luminous bacterium

630-485: A role in the regulation of luminescence in many species of bacteria. Small extracellularly secreted molecules stimulate the bacteria to turn on genes for light production when cell density, measured by concentration of the secreted molecules, is high. Pyrosomes are colonial tunicates and each zooid has a pair of luminescent organs on either side of the inlet siphon. When stimulated by light, these turn on and off, causing rhythmic flashing. No neural pathway runs between

720-426: A source of light during clandestine operations. The larvae of railroad worms ( Phrixothrix ) have paired photic organs on each body segment, able to glow with green light; these are thought to have a defensive purpose. They also have organs on the head which produce red light; they are the only terrestrial organisms to emit light of this color. Aposematism is a widely used function of bioluminescence, providing

810-582: A system of a classless, stateless direct democracy . Yet during the Second Five-Year Plan, the Indian government initiated a hierarchy of local village leaders, called the Panchayati Raj , modified in 1992 with the intent to devolve decision-making to the villages. Under Nehru India turned to a socialist model of industrial development, became a leader of non-aligned countries (those refusing to side in

900-542: A warning that the creature concerned is unpalatable. It is suggested that many firefly larvae glow to repel predators; some millipedes glow for the same purpose. Some marine organisms are believed to emit light for a similar reason. These include scale worms , jellyfish and brittle stars but further research is needed to fully establish the function of the luminescence. Such a mechanism would be of particular advantage to soft-bodied cnidarians if they were able to deter predation in this way. The limpet Latia neritoides

990-561: Is a lighthouse at the northern point of the island, near Govinda Nagar, established in the year 2005. On 30 December 2018, Prime Minister Narendra Modi announced that Havelock Island would be renamed as Swaraj Dweep. The island belongs to the Ritchie's Archipelago and is located between Peel Island and Neil Island . Politically, Swaraj Dweep is part of Port Blair taluk . The island's current population of 6,351 consists of mainly Bengali settlers. Many of these settlers have East Bengali origin as these people were given settlement by

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1080-515: Is a member of the British-organized Commonwealth of Nations. India successfully practices a democracy with regular elections inspired by western countries. Following Gandhi independent India worked to increase the status of women, who became citizens with the franchise and the right to divorce. The Aam Aadmi Party was founded in late 2012, by Arvind Kejriwal and some erstwhile activists of India Against Corruption movement, with

1170-478: Is a popular spot for snorkeling enthusiasts. Located a short boat ride away from Havelock Island, Elephant Beach is known for its vibrant coral reefs and various water activities. You can also enjoy other water sports activities like jet skiing, parasailing , sea walking, banana boat rides and many more here. Take a Kayaking Tour Embark on a kayaking adventure through the beautiful mangrove forests surrounding Havelock Island. Paddle through calm waters, marvel at

1260-478: Is all Utopian and, therefore not worth a single thought... Let India live for the true picture, though never realised in its completeness. We must have a proper picture of what we want before we can have something approaching it." After Gandhi's assassination Vinoba Bhave formed the Sarva Seva Sangh at the national level and Sarvodya Mandals at the regional level to the carry on integrated village service—with

1350-416: Is evolving with their host. Coevolutionary interactions are suggested as host organisms' anatomical adaptations have become specific to only certain luminous bacteria, to suffice ecological dependence of bioluminescence. Bioluminescence is widely studied amongst species located in the mesopelagic zone, but the benthic zone at mesopelagic depths has remained widely unknown. Benthic habitats at depths beyond

1440-419: Is expelled, distracting or repelling a potential predator, while the animal escapes to safety. The deep sea squid Octopoteuthis deletron may autotomize portions of its arms which are luminous and continue to twitch and flash, thus distracting a predator while the animal flees. Dinoflagellates may use bioluminescence for defense against predators . They shine when they detect a predator, possibly making

1530-546: Is in the blue and green light spectrum . However, some loose-jawed fish emit red and infrared light, and the genus Tomopteris emits yellow light. The most frequently encountered bioluminescent organisms may be the dinoflagellates in the surface layers of the sea, which are responsible for the sparkling luminescence sometimes seen at night in disturbed water. At least 18 genera of these phytoplankton exhibit luminosity. Luminescent dinoflagellate ecosystems are present in warm water lagoons and bays with narrow openings to

1620-455: Is much more than freedom from all restraints, it is self-rule, and could be equated with moksha or salvation . Adopting Swaraj means implementing a system whereby the state machinery is virtually nil, and the real power directly resides in the hands of people. Gandhi said: "Power resides in the people, they can use it at any time." This philosophy rests inside an individual who has to learn to be master of his own self and spreads upwards to

1710-425: Is no conclusive evidence that the cockroaches are bioluminescent. While most marine bioluminescence is green to blue, some deep sea barbeled dragonfishes in the genera Aristostomias , Pachystomias and Malacosteus emit a red glow. This adaptation allows the fish to see red-pigmented prey, which are normally invisible to other organisms in the deep ocean environment where red light has been filtered out by

1800-406: Is prevalent in the pelagic zone such as counter-illumination may not be functional or relevant in the benthic realm. Bioluminescence in bathyal benthic species still remains poorly studied due to difficulties of the collection of species at these depths. Bioluminescence has several functions in different taxa. Steven Haddock et al. (2010) list as more or less definite functions in marine organisms

1890-582: Is regenerated from the oxidized (oxyluciferin) form, allowing it to recombine with aequorin, in preparation for a subsequent flash. Photoproteins are thus enzymes , but with unusual reaction kinetics. Furthermore, some of the blue light released by aequorin in contact with calcium ions is absorbed by a green fluorescent protein , which in turn releases green light in a process called resonant energy transfer . Overall, bioluminescence has arisen over 40 times in evolutionary history. In evolution , luciferins tend to vary little: one in particular, coelenterazine ,

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1980-432: Is self-government and not good government (for Gandhi, good government is no substitute for self-government) and it means a continuous effort to be independent of government control, whether it is foreign government or whether it is national. In other words, it is sovereignty of the people based on pure moral authority . Economically, Swaraj means full economic freedom for the toiling millions. And in its fullest sense, Swaraj

2070-512: Is that bioluminescence has evolved independently at least 40 times. Bioluminescence in fish began at least by the Cretaceous period. About 1,500 fish species are known to be bioluminescent; the capability evolved independently at least 27 times. Of these, 17 involved the taking up of bioluminous bacteria from the surrounding water while in the others, the intrinsic light evolved through chemical synthesis. These fish have become surprisingly diverse in

2160-544: Is the light emitting pigment for nine phyla (groups of very different organisms), including polycystine radiolaria , Cercozoa ( Phaeodaria ), protozoa , comb jellies , cnidaria including jellyfish and corals , crustaceans , molluscs , arrow worms and vertebrates ( ray-finned fish ). Not all these organisms synthesise coelenterazine: some of them obtain it through their diet. Conversely, luciferase enzymes vary widely and tend to be different in each species. Bioluminescence occurs widely among animals, especially in

2250-534: Is the only known bioluminescent terrestrial mollusk. Pulses of light are emitted from a gland near the front of the foot and may have a communicative function, although the adaptive significance is not fully understood. Bioluminescence is used by a variety of animals to mimic other species. Many species of deep sea fish such as the anglerfish and dragonfish make use of aggressive mimicry to attract prey . They have an appendage on their heads called an esca that contains bioluminescent bacteria able to produce

2340-401: Is the only known freshwater gastropod that emits light. It produces greenish luminescent mucus which may have an anti-predator function. The marine snail Hinea brasiliana uses flashes of light, probably to deter predators. The blue-green light is emitted through the translucent shell, which functions as an efficient diffuser of light. Communication in the form of quorum sensing plays

2430-425: Is to take a cab or a two wheeler. Travelers typically take the ferry service from Port Blair to Swaraj Dweep, Swaraj Dweep to Neil Island (Shaheed Dweep) and Neil Island to Port Blair Many properties are now available at Havelock Island that can be booked. From budget to luxury all options are available. The most preferred places to stay at Swaraj Dweep are Beach No.3, and Beach No. 5. People prefer to stay closer to

2520-420: Is used for camouflage by counterillumination , in which the animal matches the overhead environmental light as seen from below. In these animals, photoreceptors control the illumination to match the brightness of the background. These light organs are usually separate from the tissue containing the bioluminescent bacteria. However, in one species, Euprymna scolopes , the bacteria are an integral component of

2610-549: The Zamindari system of land tenure and social organisation, were also inspired by the ideas of Swaraj. Swami Dayanand Saraswati , also known as Maharshi Dayanand Saraswati founder of the Arya Samaj and a Hindu reformer, defined Swaraj as the "administration of self" or "democracy". Swami Dayanand Saraswati, beginning with the premise that God had created people free to perform any work they were inclined to choose, questioned

2700-404: The firefly luciferase . Generically, this reaction can be described as: Instead of a luciferase, the jellyfish Aequorea victoria makes use of another type of protein called a photoprotein , in this case specifically aequorin . When calcium ions are added, rapid catalysis creates a brief flash quite unlike the prolonged glow produced by luciferase. In a second, much slower step, luciferin

2790-570: The Cold War), and formed an alliance with the Soviet Union (although domestically firmly rejecting Marxism–Leninism). For many decades following independence English was spoken by about 2–3% of the population, however, its use began to increase, dramatically in the 1980s. India does continue with appropriated elements of the British common law, and its rail system was built out from that left by Britain. India

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2880-505: The Indian government after the Partition of India in 1947. The six villages are: Radhanagar Beach on the western coast, also known as Number 7 Beach, is one of the most popular beaches on Swaraj Dweep and was named "Best Beach in Asia" by Time in 2004. Radhanagar beach also bagged the prestigious blue flag certification in 2020. A Blue Flag beach is an eco-tourism model endeavouring to provide

2970-500: The Oplophoridae family, uses its photophores to emit light, and can secrete a bioluminescent substance when in the presence of a predator. This secretory mechanism is common among prey fish. Many cephalopods , including at least 70 genera of squid , are bioluminescent. Some squid and small crustaceans use bioluminescent chemical mixtures or bacterial slurries in the same way as many squid use ink . A cloud of luminescent material

3060-468: The abdomen when flying and a green light from the thorax when they are disturbed or moving about on the ground. The former is probably a sexual attractant but the latter may be defensive. Larvae of the click beetle Pyrophorus nyctophanus live in the surface layers of termite mounds in Brazil. They light up the mounds by emitting a bright greenish glow which attracts the flying insects on which they feed. In

3150-525: The aim of empowering people by applying the concept of Swaraj enunciated by Gandhi, in the present day context by changing the system of governance. Bioluminescence Bioluminescence is the production and emission of light by living organisms . It is a form of chemiluminescence . Bioluminescence occurs widely in marine vertebrates and invertebrates , as well as in some fungi , microorganisms including some bioluminescent bacteria , and terrestrial arthropods such as fireflies . In some animals,

3240-480: The animal's light organ. Bioluminescence is used in a variety of ways and for different purposes. The cirrate octopod Stauroteuthis syrtensis uses emits bioluminescence from its sucker like structures. These structures are believed to have evolved from what are more commonly known as octopus suckers. They do not have the same function as the normal suckers because they no longer have any handling or grappling ability due its evolution of photophores . The placement of

3330-492: The animals obtain it through their diet. Conversely, luciferases vary widely between different species. Bioluminescence has arisen over 40 times in evolutionary history . Both Aristotle and Pliny the Elder mentioned that damp wood sometimes gives off a glow. Many centuries later Robert Boyle showed that oxygen was involved in the process, in both wood and glowworms. It was not until the late nineteenth century that bioluminescence

3420-468: The animals responsible for luminescence. He mentions pellucids, crustaceans (to which he ascribes the milky whiteness of the water), and cancers (shrimps and crabs). Under the microscope he described the "luminous property" to be in the brain, resembling "a most brilliant amethyst about the size of a large pin's head". Charles Darwin noticed bioluminescence in the sea, describing it in his Journal : While sailing in these latitudes on one very dark night,

3510-521: The atmosphere" was probably responsible. Daniel Pauly comments that Darwin "was lucky with most of his guesses, but not here", noting that biochemistry was too little known, and that the complex evolution of the marine animals involved "would have been too much for comfort". Bioluminescence attracted the attention of the United States Navy in the Cold War , since submarines in some waters can create

3600-439: The attempt to defend itself against any onslaught from without... This does not exclude dependence on and willing help from neighbours or from the world. It will be a free and voluntary play of mutual forces... In this structure composed of innumerable villages, there will be ever-widening, never-ascending circles. Growth will not be a pyramid with the apex sustained by the bottom. But it will be an oceanic circle whose center will be

3690-475: The beaches at Havelock Island. Internet connectivity at Swaraj Dweep has improved since the undersea cable from Chennai to Port Blair has been laid. The internet connectivity in all the islands has improved. At Swaraj Dweep now high-speed internet is available. Mobile networks of Airtel and BSNL are available at Swaraj Dweep. Swaraj Although Gandhi's aim of totally implementing the concepts of Swaraj in India

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3780-536: The capital city, Port Blair . Havelock Island was previously named after a British general , Sir Henry Havelock , who served in India. In December 2018, it was renamed, by Prime Minister Narendra Modi, as Swaraj Dweep as a tribute to Subhas Chandra Bose . Bose had hoisted the Indian flag at Port Blair on 30 December 1943 and proclaimed the Andaman and Nicobar Islands as liberated from British rule . He had subsequently named Neil Island as Shaheed Dweep and Ross Island

3870-444: The chemical mechanisms or to prove what function the light serves. In some cases the function is unknown, as with species in three families of earthworm ( Oligochaeta ), such as Diplocardia longa , where the coelomic fluid produces light when the animal moves. The following functions are reasonably well established in the named organisms. In many animals of the deep sea, including several squid species, bacterial bioluminescence

3960-472: The dead insect thus assisting in the dispersal of both bacteria and nematodes. A similar reason may account for the many species of fungi that emit light. Species in the genera Armillaria , Mycena , Omphalotus , Panellus , Pleurotus and others do this, emitting usually greenish light from the mycelium , cap and gills . This may attract night-flying insects and aid in spore dispersal, but other functions may also be involved. Quantula striata

4050-757: The deep ocean and control their light with the help of their nervous system, using it not just to lure prey or hide from predators, but also for communication. All bioluminescent organisms have in common that the reaction of a "luciferin" and oxygen is catalyzed by a luciferase to produce light. McElroy and Seliger proposed in 1962 that the bioluminescent reaction evolved to detoxify oxygen, in parallel with photosynthesis. Thuesen, Davis et al. showed in 2016 that bioluminescence has evolved independently 27 times within 14 fish clades across ray-finned fishes. The oldest of these appears to be Stomiiformes and Myctophidae. In sharks, bioluminescence has evolved only once. Genomic analysis of octocorals indicates that their ancestor

4140-695: The development of increased eye sensitivity and enhanced visual signals. If selection were to favor a mutation in the oxygenase enzyme required for the breakdown of pigment molecules (molecules often associated with spots used to attract a mate or distract a predator) it could have eventually resulted in external luminescence in tissues. Rees et al. use evidence gathered from the marine luciferin coelenterazine to suggest that selection acting on luciferins may have arisen from pressures to protect oceanic organisms from potentially deleterious reactive oxygen species (e.g. H 2 O 2 and O 2 ). The functional shift from antioxidation to bioluminescence probably occurred when

4230-504: The efficacy of the party systems of power politics (due to which he resigned from the Congress on more than one occasion only to be persuaded back each time) and his study of the British parliamentary systems convinced him that representative democracy was incapable of meting out justice to people. Gandhi thought it necessary to evolve a mechanism to achieve the twin objectives of empowering

4320-568: The end purpose of achieving the goal of Swaraj. Two major nonviolent movements for socio-economic and political revolution in India: the Bhoodan movement led by Vinoba Bhave and the Total Revolution Movement led by Jayaprakash Narayan were actually formed under the aegis of the ideas of Swaraj. Gandhi's model of Swaraj was almost entirely discarded by the Indian government . He had wanted

4410-417: The female lights up to attract males. The defense mechanisms for bioluminescent organisms can come in multiple forms; startling prey, counter-illumination, smoke screen or misdirection, distractive body parts, burglar alarm, sacrificial tag or warning coloration. The shrimp family Oplophoridae Dana use their bioluminescence as a way of startling the predator that is after them. Acanthephyra purpurea , within

4500-434: The following: defensive functions of startle, counterillumination (camouflage), misdirection (smoke screen), distractive body parts, burglar alarm (making predators easier for higher predators to see), and warning to deter settlers; offensive functions of lure, stun or confuse prey, illuminate prey, and mate attraction/recognition. It is much easier for researchers to detect that a species is able to produce light than to analyze

4590-402: The glowing wake of the ship, and was able to fly to it and land safely. The French pharmacologist Raphaël Dubois carried out work on bioluminescence in the late nineteenth century. He studied click beetles ( Pyrophorus ) and the marine bivalve mollusc Pholas dactylus . He refuted the old idea that bioluminescence came from phosphorus, and demonstrated that the process was related to

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4680-507: The glowworm require air for light to be produced. Harvey notes that in 1753, J. Baker identified the flagellate Noctiluca "as a luminous animal" "just visible to the naked eye", and in 1854 Johann Florian Heller (1813–1871) identified strands ( hyphae ) of fungi as the source of light in dead wood. Tuckey , in his posthumous 1818 Narrative of the Expedition to the Zaire , described catching

4770-524: The great attractions and activities to do in Havelock Island are listed below: Go Scuba Diving Havelock Island is renowned for its incredible scuba diving experiences. Dive into the crystal clear waters and discover vibrant coral reefs, exotic marine life, and underwater rock formations. There are several diving centers on the island that offer courses and guided dives for both beginners and experienced divers. Snorkel at Elephant Beach Elephant Beach

4860-412: The greatest harm to mankind. The purpose of the state is that it is an instrument for the service of the people. However, Gandhi feared that a state moulded with such an aim would ultimately revoke the rights of the citizens and seize the role of grand protector, and would demand total compliance from them. This would create a paradoxical situation where the citizens would be alienated from the state and at

4950-419: The incredible marine life up close, making memories that will last a lifetime. Game Fishing If you are an avid angler, game fishing in the waters surrounding Havelock Island is an exciting adventure. The island can be reached from Port Blair by government-operated ferries and private cruises. There are also helicopter services. There will be 2-3 government operating ferries in a day. A local bus connects

5040-415: The individual. Therefore, the outermost circumference will not wield power to crush the inner circle but will give strength to all within and derive its own strength from it. Gandhi was undaunted by the task of implementing such a utopian vision in India. He believed that by transforming enough individuals and communities, society at large would change. He said: "It may be taunted with the retort that this

5130-435: The jetty and villages on an hourly circuit. Private ferries that sail to Swaraj Dweep are Makruzz, Green Ocean, Nautika, Nautika Lite and ITT Majestic these cruises have different sailing time and schedule from Port Blair to Swaraj Dweep and from Neil Island to Swaraj Dweep. The ferry sailing to Swaraj Dweep is subject to weather conditions. Within the island you can travel in a cab, a two wheeler or bus. The most convenient way

5220-505: The laboratory, luciferase-based systems are used in genetic engineering and biomedical research. Researchers are also investigating the possibility of using bioluminescent systems for street and decorative lighting, and a bioluminescent plant has been created. Before the development of the safety lamp for use in coal mines, dried fish skins were used in Britain and Europe as a weak source of light. This experimental form of illumination avoided

5310-548: The legitimacy of the British colonial rule in India . In the Swami's view, Swaraj was the basis for the Indian independence movement . Dadabhai Navroji claimed that he had learnt the word swaraj from the Satyarth Prakash of Saraswati. Swaraj aims towards a stateless society. According to Mahatma Gandhi, the overall impact of the state on the people is harmful. He called the state a "soulless machine" which, ultimately, does

5400-566: The level of his community which must be dependent only on itself. Gandhi said: "In such a state (where Swaraj is achieved) everyone is his own ruler. He rules himself in such a manner that he is never a hindrance to his neighbour." He summarised the core principle like this: "It is Swaraj when we learn to rule ourselves." Gandhi explained his vision in 1946: Independence begins at the bottom... A society must be built in which every village has to be self-sustained and capable of managing its own affairs... It will be trained and prepared to perish in

5490-439: The light is bacteriogenic, produced by symbiotic bacteria such as those from the genus Vibrio ; in others, it is autogenic, produced by the animals themselves. In a general sense, the principal chemical reaction in bioluminescence involves a light-emitting molecule and an enzyme , generally called luciferin and luciferase , respectively. Because these are generic names, luciferins and luciferases are often distinguished by

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5580-553: The lure, they are bitten by the shark. Female Photuris fireflies sometimes mimic the light pattern of another firefly, Photinus , to attract its males as prey. In this way they obtain both food and the defensive chemicals named lucibufagins , which Photuris cannot synthesize. South American giant cockroaches of the genus Lucihormetica were believed to be the first known example of defensive mimicry, emitting light in imitation of bioluminescent, poisonous click beetles. However, doubt has been cast on this assertion, and there

5670-458: The marine environment, use of luminescence for mate attraction is chiefly known among ostracods , small shrimp-like crustaceans , especially in the family Cyprididae . Pheromones may be used for long-distance communication, with bioluminescence used at close range to enable mates to "home in". A polychaete worm, the Bermuda fireworm creates a brief display, a few nights after the full moon, when

5760-403: The mesopelagic are also poorly understood due to the same constraints. Unlike the pelagic zone where the emission of light is undisturbed in the open sea, the occurrence of bioluminescence in the benthic zone is less common. It has been attributed to the blockage of emitted light by a number of sources such as the sea floor, and inorganic and organic structures. Visual signals and communication that

5850-558: The necessity of using candles which risked sparking explosions of firedamp . In 1920, the American zoologist E. Newton Harvey published a monograph, The Nature of Animal Light , summarizing early work on bioluminescence. Harvey notes that Aristotle mentions light produced by dead fish and flesh, and that both Aristotle and Pliny the Elder (in his Natural History ) mention light from damp wood. He records that Robert Boyle experimented on these light sources, and showed that both they and

5940-402: The ocean. A different effect is the thousands of square miles of the ocean which shine with the light produced by bioluminescent bacteria, known as mareel or the milky seas effect . Bioluminescence is abundant in the pelagic zone, with the most concentration at depths devoid of light and surface waters at night. These organisms participate in diurnal vertical migration from the dark depths to

6030-441: The only unifying mechanism is the role of molecular oxygen ; often there is a concurrent release of carbon dioxide (CO 2 ). For example, the firefly luciferin/luciferase reaction requires magnesium and ATP and produces CO 2 , adenosine monophosphate (AMP) and pyrophosphate (PP) as waste products. Other cofactors may be required, such as calcium (Ca ) for the photoprotein aequorin , or magnesium (Mg ) ions and ATP for

6120-556: The open sea, including fish , jellyfish , comb jellies , crustaceans , and cephalopod molluscs; in some fungi and bacteria ; and in various terrestrial invertebrates, nearly all of which are beetles . In marine coastal habitats, about 2.5% of organisms are estimated to be bioluminescent, whereas in pelagic habitats in the eastern Pacific, about 76% of the main taxa of deep-sea animals have been found to be capable of producing light. More than 700 animal genera have been recorded with light-producing species. Most marine light-emission

6210-571: The oxidation of a specific compound, which he named luciferin , by an enzyme . He sent Harvey siphons from the mollusc preserved in sugar. Harvey had become interested in bioluminescence as a result of visiting the South Pacific and Japan and observing phosphorescent organisms there. He studied the phenomenon for many years. His research aimed to demonstrate that luciferin, and the enzymes that act on it to produce light, were interchangeable between species, showing that all bioluminescent organisms had

6300-519: The people and 'empowering' the state. It was for this that he developed the two pronged strategy of resistance (to the state) and reconstruction (through voluntary and participatory social action). Although the word Swaraj means "self-rule", Gandhi gave it the content of an integral revolution that encompasses all spheres of life: "At the individual level Swaraj is vitally connected with the capacity for dispassionate self-assessment, ceaseless self-purification and growing self-reliance." Politically, Swaraj

6390-466: The phenomenon. Today, the two prevailing hypotheses (both concerning marine bioluminescence) are those put forth by Howard Seliger in 1993 and Rees et al. in 1998. Seliger's theory identifies luciferase enzymes as the catalyst for the evolution of bioluminescent systems. It suggests that the original purpose of luciferases was as mixed-function oxygenases. As the early ancestors of many species moved into deeper and darker waters natural selection favored

6480-434: The photophores are within the animals oral reach, which leads researchers to suggest that it uses it bioluminescence to capture and lure prey. Fireflies use light to attract mates . Two systems are involved according to species; in one, females emit light from their abdomens to attract males; in the other, flying males emit signals to which the sometimes sedentary females respond. Click beetles emit an orange light from

6570-440: The predator itself more vulnerable by attracting the attention of predators from higher trophic levels. Grazing copepods release any phytoplankton cells that flash, unharmed; if they were eaten they would make the copepods glow, attracting predators, so the phytoplankton's bioluminescence is defensive. The problem of shining stomach contents is solved (and the explanation corroborated) in predatory deep-sea fishes: their stomachs have

6660-444: The reflected glare of these livid flames, was not so utterly obscure, as over the rest of the heavens. Darwin also observed a luminous "jelly-fish of the genus Dianaea", noting that: "When the waves scintillate with bright green sparks, I believe it is generally owing to minute crustacea. But there can be no doubt that very many other pelagic animals, when alive, are phosphorescent." He guessed that "a disturbed electrical condition of

6750-400: The retainment of functional eyes for organisms to detect bioluminescence. Organisms often produce bioluminescence themselves, rarely do they generate it from outside phenomena. However, there are occasions where bioluminescence is produced by bacterial symbionts that have a symbiotic relationship with the host organism. Although many luminous bacteria in the marine environment are free-living,

6840-519: The same time enslaved to it, which, according to Gandhi, was demoralising and dangerous. If Gandhi's close acquaintance with the working of the state apparatus in South Africa and in India strengthened his suspicion of a centralised, monolithic state, his intimate association with the Congress and its leaders confirmed his fears about the corrupting influence of political power and his scepticism about

6930-401: The sea presented a wonderful and most beautiful spectacle. There was a fresh breeze, and every part of the surface, which during the day is seen as foam, now glowed with a pale light. The vessel drove before her bows two billows of liquid phosphorus, and in her wake she was followed by a milky train. As far as the eye reached, the crest of every wave was bright, and the sky above the horizon, from

7020-456: The species or group, e.g. firefly luciferin . In all characterized cases, the enzyme catalyzes the oxidation of the luciferin. In some species, the luciferase requires other cofactors , such as calcium or magnesium ions, and sometimes also the energy-carrying molecule adenosine triphosphate (ATP). In evolution , luciferins vary little: one in particular, coelenterazine , is found in 11 different animal phyla , though in some of these,

7110-399: The strength of selection for antioxidation defense decreased as early species moved further down the water column. At greater depths exposure to ROS is significantly lower, as is the endogenous production of ROS through metabolism. While popular at first, Seliger's theory has been challenged, particularly on the biochemical and genetic evidence that Rees examines. What remains clear, however,

7200-411: The surface at night, dispersing the population of bioluminescent organisms across the pelagic water column. The dispersal of bioluminescence across different depths in the pelagic zone has been attributed to the selection pressures imposed by predation and the lack of places to hide in the open sea. In depths where sunlight never penetrates, often below 200m, the significance of bioluminescent is evident in

7290-525: The tourists or beachgoers clean and hygienic bathing water, facilities, safe and healthy environment. Other notable beaches include Elephant Beach on the northwest coast and Vijay Nagar Beach (No. 5), Beach No. 3 and Beach No. 1 on the east coast. Kalapathar is another famous beach. To reach Elephant beach one needs to take a boat from Swaraj Dweep jetty. Another way to reach Elephant beach is via trekking. The major 3 beaches at Swaraj Dweep are namely Radhanagar Beach, Elephant Beach and Kalapathar beach. Some of

7380-407: The twentieth and early twenty-first century was published recently. In 1932 E. N. Harvey was among the first to propose how bioluminescence could have evolved. In this early paper, he suggested that proto-bioluminescence could have arisen from respiratory chain proteins that hold fluorescent groups. This hypothesis has since been disproven, but it did lead to considerable interest in the origins of

7470-475: The unique ecosystem, and keep an eye out for exotic bird species. You can also opt for a night kayaking tour to witness the magical bioluminescence phenomenon. Sea Walk For a unique and mesmerizing experience, try the sea walk adventure in Elephant Beach. You can descend to the ocean floor while wearing a specially designed helmet that allows you to breathe effortlessly. Walk on the sandy seabed and witness

7560-487: The water column. These fish are able to utilize the longer wavelength to act as a spotlight for its prey that only they can see. The fish may also use this light to communicate with each other to find potential mates. The ability of the fish to see this light is explained by the presence of specialized rhodopsin pigment. The mechanism of light creation is through a suborbital photophore that utilizes gland cells which produce exergonic chemical reactions that produce light with

7650-449: The zooids, but each responds to the light produced by other individuals, and even to light from other nearby colonies. Communication by light emission between the zooids enables coordination of colony effort, for example in swimming where each zooid provides part of the propulsive force. Some bioluminous bacteria infect nematodes that parasitize Lepidoptera larvae. When these caterpillars die, their luminosity may attract predators to

7740-565: Was another ten years before he discovered the chemical's structure and published his 1957 paper Crystalline Cypridina Luciferin . Shimomura, Martin Chalfie , and Roger Y. Tsien won the 2008 Nobel Prize in Chemistry for their 1961 discovery and development of green fluorescent protein as a tool for biological research. Harvey wrote a detailed historical account on all forms of luminescence in 1957. An updated book on bioluminescence covering also

7830-423: Was bioluminescent as long as 540 million years ago. Bioluminescence is a form of chemiluminescence where light energy is released by a chemical reaction. This reaction involves a light-emitting pigment, the luciferin , and a luciferase , the enzyme component. Because of the diversity of luciferin/luciferase combinations, there are very few commonalities in the chemical mechanism. From currently studied systems,

7920-540: Was not achieved, the voluntary work organisations which he founded for this purpose did serve as precursors and role models for people's movements, voluntary organisations, and some of the non-governmental organisations that were subsequently launched in various parts of India. The student movement against oppressive local and central governments, led by Jayaprakash Narayan , Udit Swaraj and the Bhoodan movement , which presaged demands for land reform legislation throughout India, and which ultimately led to India's discarding of

8010-437: Was properly investigated. The phenomenon is widely distributed among animal groups, especially in marine environments. On land it occurs in fungi, bacteria and some groups of invertebrates , including insects . The uses of bioluminescence by animals include counterillumination camouflage, mimicry of other animals, for example to lure prey, and signaling to other individuals of the same species, such as to attract mates. In

8100-436: Was renamed as Netaji Subhas Chandra Bose Dweep as well. Swaraj Dweep is one of the few places that the administration of the Andaman and Nicobar Islands union territory of India has permitted and encouraged development of tourism, with a focus on promoting eco-tourism . Swaraj Dweep avoided much of the devastation by the 2004 Indian Ocean earthquake and its resulting tsunami and there were no documented casualties. There

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