Michael Faraday essays

Michael Faraday papers It was September 22, 1791. Europe was amidst a mechanical upheaval. Machine-made items were supplanting handicrafts. This was grievous for the blacksmithing James Faraday. For his entire life he had attempted to turn into an extraordinary metal forger yet now he discovered his work futile. On this day, the circumstance had become a considerably more prominent test. Margaret Faraday brought forth Michael Faraday, her third child. The Faraday family had a place with a strict gathering called the Sandemanians. The Sandemanians accepted individuals ought not make religion too intellectualized. Interestingly, they thought Gods works were easy to comprehend. These standards may have influenced their attitude toward Michaels fleeting early training. At age fourteen, he turned into an understudy to a bookbinder. This allowed him a chance to figure out how to peruse. Furthermore, he used the circumstance to develop and afterward fulfill an inclination for science. Truth be told, he was so intrigued by science he kept in touch with one of the acclaimed researchers of the day, Sir Humphry Davy of the Royal Institute of Science, and requested an occupation. Dazzled by Michaels intrigue and assurance, Sir Humphry Davy accepting Michael as his research center right hand on March 1, 1813. By and by, he accepted this open door to gain from his environmental factors. He turned out to be a remarkable capable researcher in spite of his unassuming beginnings. Incredibly, Michael Faraday, conceived in a low-class society, had enough assurance to raise himself to the top positions of English science. Strikingly he had the option to remain docile and unassuming in spite of his achievements. His notable achievements were finding chlorine liquefaction, finding benzene, finding electromagnetic and magneto-electric enlistment, and demonstrating that power actuated from a magnet, voltaic power created by a battery, and friction based electricity were no different. Faradays trial to find electromagnetic I... <!

Abraham Lincoln Essay -- essays research papers

Abraham Lincoln, from the boondocks of Hodgenville Kentucky, rose to get probably the best leader of the United States. During his endeavor to keep the Union in the Civil War, he increased more force and authority than any president before him. An astounding lawmaker, Lincoln was constantly viewed for administration for he put reason and attentive choices behind his word.Abraham Lincoln, destined to Thomas Lincoln and Nancy Hawks on February 12, 1809, was imagined in a log lodge worked by his dad. Abe had one more established sister, and a more youthful sibling that passed on as a baby. The Lincoln family moved a great deal, from Kentucky to Indiana, and back to Kentucky. Abe read a book titled Mason Locke Weems' Life and Memorable Actions of George Washington, this book frantic an enduring impact on him that convinced him for an incredible duration. When he was nineteen Abe arrived at his full developed stature of six feet four inches. He held little occupations, for example, an agent, postmaster and a couple of others through his mid twenties. At that point in 1832 he ran for province up-and-comer against 13 others. Just four were to be chosen and Lincoln completed eighth. In '834 he ran for an agent to the Illinois governing body, at this point Lincoln was notable and he got the election.Abe started to examine law, and in 1836 turned into an authorized lawyer. In 1837 he made his first open remain against bondage, Lincoln maintained a strategic distance from extraordinary abolitionist gatherings however he was significantly against slavery.On November 4, 1842 Lincoln wedded Ma...

Blog Archive Wharton Team-Based Discussion 2017 What to Expect and How to Prepare

Blog Archive Wharton Team-Based Discussion 2017 What to Expect and How to Prepare The Wharton School at the University of Pennsylvania plans to send out Round 2 interview invitations on February 8, and once again, the school is using its team-based discussion format to evaluate MBA candidates, in place of a traditional business school admissions interview. Understandably, Wharton applicants get anxious about this atypical interview, because the approach creates a very different dynamic from what one usually encounters in a one-on-one meetingâ€"and with other applicants also in the room, one cannot help but feel less in control of the content and direction of the conversation. Yet despite the uncertainty, here are a few things that interviewees can expect: You will need to arrive at the interview with an ideaâ€"a response to a challenge that will be presented in your interview invitation. Having the best idea is much less important than how you interact with others in the group and communicate your thoughts. So while you should prepare an idea ahead of time, that is only part of what you will be evaluated on. Your peers will have prepared their ideas as well. Chances are that ideas will be raised that you know little or nothing about. Do not worry! The admissions committee members are not measuring your topical expertise. Instead, they want to see how you add to the collective output of the team. After the team-based discussion, you will have a short one-on-one session with someone representing Wharton’s admissions team. More than likely, you will be asked to reflect on how the team-based discussion went for you; this will require self-awareness on your part. To give candidates the opportunity to undergo a realistic test run before experiencing the actual event, we created our Wharton Team-Based Discussion Simulation. Via this simulation, applicants participate anonymously with three to five other MBA candidates in an online conversation, which is moderated by two of our experienced Senior Consultants familiar with Wharton’s format and approach. All participants then receive feedback on their performance, with special focus on their interpersonal skills and communication abilities. The simulation builds confidence by highlighting your role in a team, examining how you communicate your ideas toâ€"and withinâ€"a group of (equally talented) peers, and discovering how you react when you are thrown “in the deep end” and have to swim. Our Wharton Team-Based Discussion Simulation allows you to test the experience so you are ready for the real thing! The 2017 Wharton Team-Based Discussion Simulation schedule is as follows: Group A: Sunday, February 12 at 10:00 a.m. ET Group B: Sunday, February 12 at 12:00 p.m. ET Group C: Monday, February 13 at 9:00 p.m. ET Group D: Tuesday, February 14 at 6:00 p.m. ET Group E: Wednesday, February 15 at 6:00 p.m. ET Group F: Friday, February 17 at 4:00 p.m. ET Group G: Sunday, February 19 at 10:00 a.m. ET Group H: Sunday, February 19 at 12:00 p.m. ET Group I: Tuesday, February 21 at 9:00 p.m. ET Group J: Wednesday, February 22 at 9:00 p.m. ET Group K: Friday, February 24 at 4:00 p.m. ET Group L: Sunday, February 26 at 12:00 p.m. ET To learn more or sign up for a session, visit our Wharton Team-Based Discussion Simulation page. Share ThisTweet Business School Managing the MBA Interview mbaMission Events News University of Pennsylvania (Wharton) Blog Archive Wharton Team-Based Discussion 2017 What to Expect and How to Prepare The Wharton School at the University of Pennsylvania plans to send out Round 1 interview invitations on October 31, and once again, the school is using its team-based discussion format rather than a traditional admissions interview to evaluate its candidates. Understandably, Wharton applicants get anxious about this atypical interview, because the approach creates a very different dynamic from what one usually encounters in a one-on-one meetingâ€"and with other applicants also in the room, one cannot help but feel less in control of the content and direction of the conversation. Yet despite the uncertainty, here are a few things that interviewees can expect: You will need to arrive at the interview with an ideaâ€"a response to a challenge that will be presented in your interview invitation. Having the best idea is much less important than how you interact with others in the group and communicate your thoughts. So while you should prepare an idea ahead of time, that is only part of what you will be evaluated on. Your peers will have prepared their ideas as well. Chances are that ideas will be raised that you know little or nothing about. Do not worry! The admissions committee members are not measuring your topical expertise. Instead, they want to see how you add to the collective output of the team. After the team-based discussion, you will have a short one-on-one session with someone representing Wharton’s admissions team. More than likely, you will be asked to reflect on how the team-based discussion went for you; this will require self-awareness on your part. To give candidates the opportunity to undergo a realistic test run before experiencing the actual event, we created our  Wharton Team-Based Discussion Simulation. Via this simulation, applicants participate anonymously with three to five other MBA candidates in an online conversation, which is moderated by two of our experienced Senior Consultants familiar with Wharton’s format and approach. All participants then receive feedback on their performance, with special focus on their interpersonal skills and communication abilities. The simulation builds confidence by highlighting your role in a team, examining how you communicate your ideas toâ€"and withinâ€"a group of (equally talented) peers, and discovering how you react when you are thrown “in the deep end” and have to swim. Our Wharton Team-Based Discussion Simulation allows you to test the experience so you are ready for the real thing! The 2017 Wharton Team-Based Discussion Simulation Round 1 schedule is as follows: Group A: Saturday, November 4 at 11:00 a.m. ET   Group B: Saturday, November 4 at 2:00 p.m. ET   Group C: Sunday, November 5 at 1:00 p.m. ET   Group D: Monday, November 6 at 6:00 p.m. ET   Group E: Monday, November 6 at 9:00 p.m. ET   Group F: Tuesday, November 7 at 6:00 p.m. ET   Group G: Tuesday, November 7 at 9:00 p.m. ET   Group H: Wednesday, November 8 at 6:00 p.m. ET   Group I: Thursday, November 9 at 6:00 p.m. ET   Group J: Saturday, November 11 at 11:00 a.m. ET   Group K: Saturday, November 11 at 2:00 p.m. ET   Group L: Sunday, November 12 at 11:00 a.m. ET   Group M: Monday, November 13 at 9:00 p.m. ET   Group N: Tuesday, November 14 at 9:00 p.m. ET To learn more or sign up for a session, visit our  Wharton Team-Based Discussion Simulation page. Share ThisTweet Business School Events Interviews Managing the MBA Interview mbaMission Events News University of Pennsylvania (Wharton)

Compare and Contrast of Ernest Hemmingway´s A Clean Well...

In Ernest Hemingway’s â€Å"A Clean, Well-Lighted Place† and Sandra Cisneros’s â€Å"The House on Mango Street†, the authors describe their feelings towards the settings in a similar way. In Hemingway’s short story, two waiters at a cafà © describe the differences in their lives and how they see life before them. In Cisneros’s short story, the narrator explains her past, present, and future places of residency and the impact it has in her life. Both settings in each story are different, but also very much alike, because of the people in the stories and the feeling of want and betterment that you get from both the waiters in â€Å"A Clean, Well-Lighted Place† and the narrator in â€Å"The House on Mango Street†. In â€Å"A Clean, Well-Lighted Place†, an old man†¦show more content†¦The House on Mango Street was very small and dilapidated. There was only one bedroom and bathroom for all six of them to share. The f ront door was too big for the frame and no front yard to play in. Even though this house was far better improvement than past homes, she still had hoped for something bigger and better. The narrator gives a very descriptive view of this future dream home. She says â€Å"and inside it [will] have real stairs, not ordinary hallway stairs, but stairs like the houses on T.V†¦ [and] at least three washrooms†¦ and a big yard with grass growing without a fence† (Cisnero’s.552). The story has a theme of disappointment. The narrator keeps hoping for this elaborate home, but just keeps getting disappointed. For the older waiter in â€Å"A Clean Well-Lighted Place†, the cafe symbolizes home because he feels that is all the he has. He says that he lacks confidence but he does have a job. He doesnt want to leave the cafe and he feels that others can benefit from such a place as having somewhere to go. The narrator in â€Å"The House on Mango Street† realizes that she does not feel she has a place called home. The story symbolizes for her a place of wanting better for herself. She has always known promises, but she has never seen them and she vows to herself to have that one day. The older waiter and Esperanza are alike in that they both believe in something so great for themselves. For example the older waiter

Geology of Valley of Fire State Park, Nevada

Malincho - 1898 Words

1. Overall Assessment Kalin Pentchev created an increasingly growing business out of confidence, determination and sheer luck. Building a company from scratch is complex and certainly takes some of these qualities to persevere, but must also take planning, analysis and strategy. While Kalin displayed confidence, which Professor Sarathy explained contributes to a company’s success, it was gained from his own determination not to fail, rather than from having an understanding of international marketing. Instead of using well-mapped out plans and strategy to guide his company, Kalin created a reactive business with decision-making occurring as issues and dilemmas arose. Unfortunately, as a result, he made several mistakes common to†¦show more content†¦Chasing Orders Kalin developed a reactive business that responded to situations as they occurred. His strategies were the result of things gone wrong. As an example, he had to change his lower-price selling strategy after a distributor warned him of the consequences and struggled to even maintain an effective pricing strategy because his focus was on selling the product as quickly as possible. Instead of developing relationships and taking care of the customers, like the Lebanese storekeeper, he provided to some poor service and coincidentally treated them similarly to the way his distributer treated him with little contact and no follow up. â€Å"Desperate and determined† and rather than taking a step-back to prepare a solid selling strategy, he looked for customers in yet another market, the larger-volume cheese buyers. Assumed Successful Home Market Products and Techniques Worked Anywhere In addition, Kalin also built a business of faith assuming that cultural values and business practices that previously worked in his home country would be transferable to a U.S.-based company. For example, Kalin suggested that all customers believed non-payment to a vendor was offensive and feared reprisal from a fictional, more powerful business man. Although it is important to understand the cultural values of theShow MoreRelatedMalincho Case1155 Words   |  5 Pages Malincho Case Study Analysis By: Faraz, Jadee and AmbreenProfessor: Tobar Byron Subject: International Strategic Management (BMI703) Date: 09/ 08/ 2014 Table of contents Executive summary the Problem/Opportunity the Organization’s current mission, goals and strategies the company s internal strengths and weakness (SWOT analysis) recommendation Selected recommendation Action Plan Implementation Conclusion Executive summary: Kalin is a Bulgarian entrepreneur. He tried toRead MoreMica Case Malincho Essay632 Words   |  3 PagesMICA Case Study: Malincho 1. Timmons Model of Entrepreneurial Process The Timmons model was developed by Jeffery Timmons to help entrepreneurs improve their odds of success. The model centres on that the entrepreneurship is opportunity driven. According to this model, first of all, it is the entrepreneur, who is the driving factor in launching a new company. Within the three components, the process starts with a market opportunity, where the size and type of opportunity will define the teamRead MoreMalincho Case Study Essay642 Words   |  3 PagesMalincho Case Study The Timmons entrepreneurship is a model that considers opportunities teams and resources available to an entrepreneur and holds that success depends on the ability of the entrepreneur to balance these critical factors. When applying the first part of the Timmons model to the Malincho case, Kalin got the idea of importing feta cheese and selling it to fellow Bulgarians on the East coast of America who were hungry for a taste of home. Once he identified this opportunity,Read MoreBa470 Week 1 Assignment791 Words   |  4 PagesMalincho Case Study Kalin searched for an opportunity, and on finding it, shaped the opportunity into a high-potential venture by drawing up a team and gathering the required resources to start a business that capitalized on the opportunity. In the process of starting the business, he risked his career, personal cash flow and net worth. The Timmons model bases itself on the premise that Kalin will earn rewards in commensuration with the risk and effort involved in starting or financing the business

Different Types Of Salmon Aquaculture †MyAssignmenthelp.com

Question: Discuss about the Different Types Of Salmon Aquaculture. Answer: Introduction Salmon is a ray finned fish which to the family of Salmonidae. There are other fishes that belong to the same family, like whitefish, grayling, char, trout. Salmon is natively found in the tributaries of Pacific Ocean and North Atlantic Ocean. The species that are found in the Atlantic Ocean belong to the genus Salmo and the species that are found in the Pacific Ocean belong to the genus Oncorhynchus. Salmon was introduced in North America and also in South America, within non-native environments of Great Lakes and Patagonia respectively (Aas et al., 2010). The fish is intensively farmed in different parts of the world. An adult Atlantic salmon weighs around 10 pounds, while a king Salmon weighs around 23 pounds. However, fishes weighing around 50 to 80 pounds are also common. There are different types of Salmon like Cham Salmon, Coho salmon, Sockeye salmon, and pink salmon. Salmon fish are anadromous, which means that the fishes lay their eggs in freshwater and then return to the oc ean. The fishes again return to the freshwater to reproduce. Different species of Salmon exhibit the anadromous character, while other species of Salmon exhibit the freshwater characteristics (Miramichi Salmon Association, 2018). This study is based on the discussion on the physiological and the environmental factors involved in smoltification in salmon; and how the manipulation of these factors revolutionized the salmon aquaculture. Osmoregulation In order to understand osmoregulation (active regulation), it is necessary to discuss about the osmosis (passive regulation). Cells contain a lot of different solutes (polysaccharides, proteins, ions) and water, which creates a specific concentration inside the cell membrane. The membrane is Semi permeable which means that, it allows only water to pass through it and does not allow the solutes. The law of osmosis can be seen when a cell is kept inside solution exhibiting a different concentration. Due to osmotic pressure water moves into the solution from a high concentration to a region of low concentration via a semipermeable membrane. The movement of water takes place to balance the concentration (Bbc.co.uk, 2018). Maintaining a homeostatic balance is a big issue for the fishes in both the marine water and fresh water, because the metabolic processes inside the body of a fish occur specifically in certain chemical and physical environment. To keep up with the constantly with the internal environment, a continuous adaptation with respect to the concentration of oxygen, carbon dioxide, glucose, calcium ion, potassium ion, sodium ion, pH and temperature. The main problem of the fishes is the osmoregulation. Active regulation of the osmotic pressure in order to maintain the concentration of the salts and the fluid balance is called osmoregulation (Whittamore, 2012). Firstly the freshwater fishes, the salt concentration inside the body is higher in comparison to the surrounding water, thus water moves in to the body because of osmosis. If there is no regulation at this point, then the fishes would swell up. In order to compensate this, kidneys produce a large amount of urine and this signifies loss of salt from the body. Thus to compensate for this loss, specialized cells in gills (called chloride cells) absorbs ion from water and is directly transported to the blood stream (Whittamore, 2012). The marine fishes face a different situation, the concentration of salt in the blood is much lower in comparison to the sea water. Does fishes constantly lose water and build up salt concentration inside the body. To compensate for the loss of water from the body fishes drink a lot of water. Due to the small size of the kidney and the inability to excrete a large amount of urine, marine fishes excrete salt from the gills. The gills have specialized cells called to chloride cells which function in just the opposite way the gills in freshwater fishes function (Edwards Marshall, 2012). Smoltification Smoltification is a process in which the behavioral, morphological and physiological changes that a young salmon fish undergoes during migration from freshwater to a saltwater region. Considering the life cycle of a salmon fish, it starts its life in the freshwater and it gets prepared to enter in to the oceanic water where the concentration of salt is high. Three important changes take place at this stage of the life cycle. Firstly, the fish starts to drink a lot of water. Secondly, the urine production reduces to great extent by the kidneys. Thirdly, the molecular pumps or the chloride cells in the gills function reversely. Which means that, the chloride cells pumps sodium out instead of absorbing it. When the fishes reenter in to the freshwater, the body of the salmon fishes starts to acclimatize automatically. The fishes stay within the estuarial zone in order to get acclimatized (Lerner, Sheridan McCormick, 2012). The process of smoltification also occurs in the other species like sharks. In the estuaries, where the sea water meets the freshwater changes in concentration occur gradually. Sharks are known to move further in to the freshwater zone and the process of osmoregulation also occurs differently in comparison to the salmon. Sharks convert ammonia to urea and are capable of retaining it within the blood stream which is slightly more concentrated than the sea water. Through this way, the loss of water through the osmosis is prevented and the excess salt is excreted via the rectal gland. These processes are regulated by hormones and controlled by brain. Hormones like thyroid and cortisol are the effective regulators of osmotic pressure which influences the direction and the rate of the ions that are pumped through the chloride cells (Cramp, Hansen Franklin, 2015). Environmental factors affecting smoltification Contaminant exposure- It has recently been found that the change in water chemistry has a detrimental effect on the early marine survival and the process of smoltification. This can be attributed to the non-point source of industrial pollutants, exposure to trace heavy metal, mineral deposit drainage. In addition the trace heavy metal from the drainage of the mineral deposits, intensive forest areas, ranges and agricultural areas. This results into the movement of low level concentration of herbicides in to the rearing of the juvenile salmon (Solomon et al., 2013). Water temperature- In order to increase the growth and reduce the time required for the production of the smolts, elevated temperature is used. However, care must be taken because artificial temperatures potentially affect the process of smolting as well as the growth (National Oceanic and Atmospheric Administration, 2018). Photoperiod- research has shown that there is a positive correlation with the behavioral and the physiological aspects with respect to the endocrine system. Because there is direct chemical link with the physiological and the environmental changes in fish. There is a strong link of the photoperiod with the seasonal cycle of growth in the juvenile salmon and the smolting process (National Oceanic and Atmospheric Administration, 2018). Photoperiod control of smoltification Presently a major problem faced by salmon industry is that they are unable to produce and maintain a continuity in the product sizes in accordance to the market demand which are existing throughout the year. Such problems exist because fishes had introduced into the sea for a very short period of time during the early summer and the spring. Due to this the production is not even according to the size of the market and also results in an unavailability What the Fish products. At certain times of the year, the transfer of smolts into the ocean water has implications on the costing and the production on the smolts. Similar to spawning and maturation the smoltification timing is affected by the patterns of the season and day length changes. Extension cord compression of the annual rate of change of photoperiod leads to both the delay and advancement in the completion of smoltification. Photoperiods that change seasonally can be replaced by the combinations of constant short and long days . Bringing modifications in the combinations of short and long days as well as seasonal changes can effectively increase the production of smolts during several months of the year (Zydlewski, Stich McCormick, 2014). The major complications that arise with the manipulation of the photoperiod is the timing of the process. Similar to the process of reproduction which is controlled seasonally, the process of smolting is dependent on the endogenous clocks or mechanisms. Under the ambient conditions the endogenous clocks can be identified or determined through the seasonally changing day length. Under the modified light conditions, the different components of this system that include hypo osmoregulatory ability, body silvering, condition factor, factors that control growth will collectively affect the smoltification process. The components might get desynchronized and the probable effects are reflected in the poor rates of survival when transferred to see water. Manipulation of the photoperiod result in affecting the commercial viability of the fishes and affect the maturation of the pre and the post smolts. Thus, any alteration in the photoperiod result in the reduction of the number of smolts, reduc ed rates of survival when the smolts are transferred to the sea water affecting the early maturation and also cause vital problems for the production management of the grow out farms (Imsland, Handeland Stefansson, 2014). Environmental factors and the physiological processes involved in smoltification of salmon Environmental factors- contaminant exposure is one of the prime environmental factor which is affecting the smoltification. The gill ATPase enzyme present in the salmon fishes is highly sensible to the levels of the trace heavy metals dissolved in water. The exposure to the copper during the transformation of parr-smolt can potentially inactivate the gill-ATPase enzyme. The biological damage is not apparent unless the fish moves to the sea water. Just during this movement, the severe mortalities begin to occur. Another negative consequence of such a phenomenon is that the migratory also gets suppressed due to the inactivity of the gill ATPase. Cadmium levels of 4 microgram per liter in the freshwater also result in mortality when the coho smolts are transferred to the thirty percent sea water. Chromium or nickel although does not affect the migratory behavior, but exposure to mercury severely affects the migratory behavior. Other implication of mercury exposure can be related to the malformed development of the embryos when the exposure is only of 2.5 microgram per liter. The herbicide concentration also increase into the waterbodies due to the surface run off from the agricultural fields, and the accumulation of herbicide in to the body of the coho salmon smolts resulted in hampered migratory behavior (Thorstad et al., 2012). Water temperature and the rearing temperature have been found to be directly impacting the gill ATPase activity and the hypoosmoregulatory activity during the process of smolting. It has been seen in certain species that increase in temperature accelerates the onset of smolting and on the other hand also delays the time period of desmoltification. Coho salmon at the 6 degree Celsius shows rise in the gill ATPase activity, and a precocious development is found at 2o degree Celsius. However, the process of desmoltification enhances due to the increase in temperature. Not all species of salmon show positive responses to the temperature rise. Steelhead trout are found to be potentially affected by the elevated level of temperature rise, while temperature above 13 degree Celsius inhibits smolting. The Atlantic salmon are not similar to the steel head trout. When the temperature rises around 10 degree Celsius, the activity of the downstream activity of salmon rises (Bjrnsson, Stefansson M cCormick, 2011). Photoperiod plays a significant role in the migratory behavior and the development of the smolt characteristics. The rate of change of the photoperiod played an important part in the modification of the periods of smolting. It has been found that presmolts kept in 7 hour dark period and 17 hour light significantly increases the gill ATPase activity and the plasma thyroxine. However, prolonged periods of exposure to the day light inhibit smolting and growth. Physiological process- According to the normal life history of Salmon, it migrates as juveniles from fresh water into the sea. Atlantic salmon undergoes transformational changes to get adapted to the oceanic life. The parr-smolt transformation involves both the physiological and the morphological changes in order to get acclimatized to the high saline conditions in sea water. The development of smolt is controlled by both the environmental and developmental information. Due to the exposure of increased day length, components of neuroendocrine axis become sensitive. Plasma levels of growth hormone increases due to the activation half right brain pituitary axis. This results in increased levels plasma levels of growth hormone. It has also been found that the levels of Plasma cortisol increases, and this hormones control the biochemical and cellular changes inside the gill. This increases the gill sodium potassium ATPase activity and results in increased salt tolerance. Triiodothyronine , thyroxine, thyroid hormones increase during the smolt development. These changes are actively thought to alter morphological and behavioral characteristics of the fish (McCormick et al., 2013). Salmon aquaculture Photoperiod is an important determinant in initiating sexual maturation in the salmon fishes. More than the specific day length, the direction of photoperiod plays a major role in orchestrating sexual maturity and reproduction. Prolonged exposure to long day lengths increased the attainment of sexual maturity in this fishes. Aquaculture of the salmon fishes gives a better control over the adverse environmental conditions. Aquaculture provides a better opportunity to alter the photoperiod easily and helps in the production cycle. While at the same time gives a better control over certain environmental variables like water temperature. Water temperature on the other hand is one of the important environmental parameter which directly influences the physiology of the fishes. The internal temperature of the fish is directly dependent on the external ambient temperature. Physiological development of eggs and larvae, egg hatching, time of spawning, growth rate, metabolic rate all her direct ly related to the natural environment and water temperature. It has been found that aquaculture of salmon at temperatures ranging 2 to 16 degree Celsius effectively increases the growth rate (Thyholdt, 2014). Conclusion Thus, from the above discussion it can be concluded that the life cycle of salmon fish is directly influenced by the environmental factors like water temperature, photoperiod, herbicides and traces of heavy metal. Salmon fishes can survive both in freshwater and sea water which makes it a complex fish for aquaculture. In order to aquaculture salmon fishes, several parameters like water temperature, photoperiod and also the environmental conditions must be kept at check. Only after keeping all the parameters at optimal conditions can favor the growth of salmon fishes rapidly. References Aas, ., Klemetsen, A., Einum, S., Skurdal, J. (Eds.). (2010). Atlantic salmon ecology. John Wiley Sons. Bbc.co.uk. (2018). BBC - GCSE Bitesize: Osmosis in cells. Bbc.co.uk. Retrieved 15 February 2018, from https://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/greenworld/waterrev2.shtml Bjrnsson, B. T., Stefansson, S. O., McCormick, S. D. (2011). Environmental endocrinology of salmon smoltification. General and comparative endocrinology, 170(2), 290-298. DOI https://doi.org/10.1016/j.ygcen.2010.07.003 Cramp, R. L., Hansen, M. J., Franklin, C. E. (2015). Osmoregulation by juvenile brown-banded bamboo sharks, Chiloscyllium punctatum, in hypo-and hyper-saline waters. Comparative Biochemistry and Physiology Part A: Molecular Integrative Physiology, 185, 107-114. DOI https://doi.org/10.1016/j.cbpa.2015.04.001 Edwards, S. L., Marshall, W. S. (2012). Principles and patterns of osmoregulation and euryhalinity in fishes. In Fish Physiology (Vol. 32, pp. 1-44). Academic Press. DOI https://doi.org/10.1016/B978-0-12-396951-4.00001-3 Imsland, A. K., Handeland, S. O., Stefansson, S. O. (2014). Photoperiod and temperature effects on growth and maturation of pre-and post-smolt Atlantic salmon. Aquaculture international, 22(4), 1331-1345. DOI https://doi.org/10.1007/s10499-014-9750-1 Lerner, D. T., Sheridan, M. A., McCormick, S. D. (2012). Estrogenic compounds decrease growth hormone receptor abundance and alter osmoregulation in Atlantic salmon. General and comparative endocrinology, 179(2), 196-204. DOI https://doi.org/10.1016/j.ygcen.2012.08.001 McCormick, S. D., Sheehan, T. F., Bjrnsson, B. T., Lipsky, C., Kocik, J. F., Regish, A. M., O'Dea, M. F. (2013). Physiological and endocrine changes in Atlantic salmon smolts during hatchery rearing, downstream migration, and ocean entry. Canadian journal of fisheries and aquatic sciences, 70(1), 105-118. DOI https://doi.org/10.1139/cjfas-2012-0151 Miramichi Salmon Association. (2018). Life Cycle of the Atlantic Salmon - Miramichi Salmon Association. Miramichi Salmon Association. Retrieved 15 February 2018, from https://miramichisalmon.ca/education/atlantic-salmon/ National Oceanic and Atmospheric Administration. (2018). Spo.nmfs.noaa.gov. Retrieved 15 February 2018, from https://spo.nmfs.noaa.gov/mfr426/mfr4261.pdf Solomon, K. R., Dalhoff, K., Volz, D., Van Der Kraak, G. (2013). Effects of herbicides on fish. In Fish physiology (Vol. 33, pp. 369-409). Academic Press. DOI https://doi.org/10.1016/B978-0-12-398254-4.00007-8 Thorstad, E. B., Whoriskey, F., Uglem, I., Moore, A., Rikardsen, A. H., Finstad, B. (2012). A critical life stage of the Atlantic salmon Salmo salar: behaviour and survival during the smolt and initial post?smolt migration. Journal of Fish Biology, 81(2), 500-542. DOI: 10.1111/j.1095-8649.2012.03370.x Thyholdt, S. B. (2014). The importance of temperature in farmed salmon growth: Regional growth functions for Norwegian farmed salmon. Aquaculture Economics Management, 18(2), 189-204. DOI https://doi.org/10.1080/13657305.2014.903310 Whittamore, J. M. (2012). Osmoregulation and epithelial water transport: lessons from the intestine of marine teleost fish. Journal of Comparative Physiology B, 182(1), 1-39. DOI https://doi.org/10.1007/s00360-011-0601-3 Zydlewski, G. B., Stich, D. S., McCormick, S. D. (2014). Photoperiod control of downstream movements of Atlantic salmon Salmo salar smolts. Journal of fish biology, 85(4), 1023-1041. DOI: 10.1111/jfb.12509