Species Native Research Paper Example | Topics and Well Written Essays - 500 words

Species Native - Research Paper Example An adult green sea turtle weighs over 500 pounds. Like all other turtle species, green sea turtles possess a hard structure called shell, whose function is to provide protection to the turtle from predators. The part of the shell that is on the dorsal (back) side is known as the carapace (Green Sea Turtles, n.d.). This portion is heart shaped, and is as long as 5 feet. It is covered with large scales which are called scutes. The ventral part of the shell that covers the belly is known as the plastron. The dorsal and ventral parts are connected to each other at the sides through hard-shelled plates which are known as lateral bridges. The connection between the carapace and plastron breaks at the openings for the head, tail and limbs. The difference between green sea turtles, land turtles and tortoises is that green sea turtles are not able to retract their small heads into the shell for extra protection. The shells of green sea turtles are very light weight and are more developed as c ompared to shells of land turtles. The limbs seem like flippers that help them swim long distances in less time, making them refined swimmers. Adult turtles are herbivorous in nature. This characteristic makes them harmless to other animals living under water with them like fish. They hold bacteria in their guts, and depend on them for digestion of plant food. This is the case with adult turtles only. Young turtles are carnivorous. They feed on jellyfish and other little invertebrates. The dorsal surface of the shell or the carapace is dark brown in color but it gets covered with patches of algae on which fish feeds. The exact lifespan of green sea turtles is still unknown. They grow very slowly. The growth is so slow that they take 10 to 50 years to be able to become sexually mature to reproduce (Bredeson, 2007). The average age of maturity is 25 years. Due to this long lifespan and period of maturity, green sea turtles take too many years to recover from a significant population

B300 TMA01 Essay Example | Topics and Well Written Essays - 2000 words

B300 TMA01 - Essay Example The demand for BBC shows started to decline when the UK government signed and implemented the Television Act of 1954. This provision gave way to other independent television companies to compete with BBC shows. Due to high technology that has been developed in the past few years, a lot of television competitors have emerged in the television industry. This allows many viewers to have a lot of channels to choose from. ITV including GMTV is considered as the close competitor of BBC 1 & 2. As of December 2000, ITV and GMTV were able to capture 30% share of viewing.1 The availability of cable and satellite network has captured as much as 18% of the viewers away from BBC television. This is also one big factor why the over the past few years, BBC television 1 and 2 is slowly loosing its share of total viewing to other sources of media. (See Table I and Chart I on page 4) In year 2001, globalization has become the market trend for all the industries. The opening of the international trading itself has become the main factor of a tighter competition in all businesses. This also affects the television and broadcasting business of BBC. It is therefore expected that the number of other commercial viewing will continue to grow in case BBC fails to maintain its loyal viewers. BBC is continuously striving hard to hold on to its present market share by keeping its operational costs down and at the same time doing its best to motivate the employees to work well despite the fact that the company has decided for a mass lay-off in 2000 in order to save some money in sustaining the production of program.2 It has been evident in the past that the choices of people changes with time. Back in 1920s, people are much satisfied and amazed with listening to a broadcasting radio.3 This trend was changed in the late 1930s when the use of television became more in demand.4 (See Diagram I – The Transition of Modern Technology Over the Years below) The