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IELTS Academic Task 1: Salmon Fish Life Cycle and Population

The diagrams below show the life cycle of a salmon fish from an egg to an adult fish and its population from 1970 to 1999 in North America. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

Life Cycle of a Salmon FishSalmon Fish population

20 minutes, 150 words at least.

Answer:

The given diagram presents the life cycle of a salmon fish from birth through an egg to an adult which spawns new eggs before dying. The bar chart provides data about the number of Salmon fish in North America during five-year periods. (Introduction)

The adult Salmon fish, both male and female, spawn and fertilize the eggs before dying. These eggs soon hatch to give birth to a baby, often termed as Alevin. Alevin then develops into a fry, which later becomes Parr. A Parr transforms into a Smolt before becoming an adult. The adult Salmon then spawns to lay eggs before dying. (Diagram 1 explained)

The population of Salmon has dwindled drastically during the past few decades. North America had more than 35000 Salmon fish during the five years from 1970 to 1974. The number fell drastically till 1990 to 1994 when its population was just 500. Thereafter, it rose marginally to about 1500 in 1995 to 1999. Overall, the fish’s population is only a fraction of what it was in 1970 to 1974. (Bar chart explained)

170 words.

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One response

  1. The diagram illustrates the whole cycle of salmon fish’s life starting from spawning until it becomes an adult fish. The bar graph shows data on the population of salmon fish in North America from 1970 until 1999.

    Overall, there are seven stages of the life cycle of a salmon. The population of salmon fish became lower over the period. The highest number is in 1970 to 1974, whereas, in 1990 to 1994 is the lowest.

    Male and female adult salmon fish spawn and give birth to the eggs. The eggs are fertlize and hatch to a baby fish which oftenly called Alevin. The Alevin develops to a Fry before becoming a Part. The Parr develops and turns into a Smolt and finally becomes an adult fish which is ready to spawn and makes eggs again and continue the cycle.

    The population of salmon fish began with the highest number which is approximately 35,000 in the beginning years. It dropped and almost halved in 1975 to 1979. The population continued to fell in the following years reaching the lowest point in 1990 to 1994 with a very insignificant number.

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