Wild tuna, a species of large ocean fish, have decreased in number because of overfishing Recently, attempts have been made to farm tuna by feeding the fish in ocean cages until they become large enough for sale. However, tuna farming has faced several problems and criticisms.
First, female tuna do not lay eggs in captivity, so tuna farmers must capture large quantities of young wild tuna to stock their farms, further reducing wild tuna populations. These young tuna are caged and fed until they are large enough to be sold. Since the captured females in tuna farms cannot lay eggs to replace the tuna that are sold, tuna farmers continue to catch young wild tuna to keep their farms going and so worsen the decline in wild tuna populations.
Second, tuna raised on farms are very expensive because they depend on a costly, high-protein food derived from other fish. Tuna feed almost exclusively on small fish, which supply them with the proteins and nutrients they require. A single tuna can grow more than four meters long, weigh close to 700 kilograms, and eat 70 kilograms of food a day! It is unlikely that tuna farms can remain profitable while supplying so much expensive food for the tuna.
Third tuna confined to ocean cages are likely to become infested with parasites, organisms that feed on and weaken the animal they attach to. Tuna farmers off the coast of southern Australia have had problems with infestations of blood flukes, a type of parasite that lives within the blood vessels and heart of infected fish. Parasite infestations weaken tuna, slow their growth, and can even cause death, usually by making them susceptible to other diseases. Tuna farms in southern Australia have had 10 percent of their tuna die before they could be sold.
In this set of materials, the reading passage claims that the population of wild tuna has been decreased recently due to overfishing, and scientists state several criticisms about farming tuna. However, the lecturer asserts some promising solutions to address all concerns and explains her evidence.
First of all, it is mentioned in the passage that female tuna cannot lay eggs when they are in cages. In contrast, the professor points out that certain hormones help female tuna to reproduce efficiently, and researchers inject them directly to their bodies, while they do not cause any harm for fishes and consumer later. She believes that this breakthrough discovery can solve this problem, which prevents the population decline. Hence, female fishes still can produce more young tuna, even in captivity.
Furthermore, the author of the passage argues that tuna feed on high-protein food derived from other fish, which are costly for farmers. Conversely, the lecturer refutes the former notion and believes that unlike what was stated in the article, they can eat plants that are high in protein as well, and it is not necessary to exclusively consume small fishes to grow. Moreover, those specific plants are inexpensive and affordable, and farmers still have a profitable business. Therefore, farmers have an alternative way to reduce the cost of growing tuna.
Finally, the reading explains that tuna confined to ocean cages are susceptible to become infested with parasites. On the contrary, the professor states that farmers can move the cages to deeper parts of the ocean because blood flukes, a parasite that lives in the blood vessels, like to live close to shore and cannot survive in deeper zones. In fact, if farmers transfer tuna to safer areas, they can basically stop infestations of blood flukes and increase the population of alive tuna.
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Transition Words or Phrases used:
conversely, finally, first, furthermore, hence, however, if, moreover, so, still, therefore, well, while, in contrast, in fact, first of all, on the contrary
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 9.0 10.4613686534 86% => OK
Auxiliary verbs: 7.0 5.04856512141 139% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 13.0 12.0772626932 108% => OK
Pronoun: 24.0 22.412803532 107% => OK
Preposition: 38.0 30.3222958057 125% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1561.0 1373.03311258 114% => OK
No of words: 299.0 270.72406181 110% => OK
Chars per words: 5.22073578595 5.08290768461 103% => OK
Fourth root words length: 4.1583189471 4.04702891845 103% => OK
Word Length SD: 2.61457189128 2.5805825403 101% => OK
Unique words: 183.0 145.348785872 126% => OK
Unique words percentage: 0.612040133779 0.540411800872 113% => OK
syllable_count: 493.2 419.366225166 118% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 4.0 1.51434878587 264% => Less conjunction wanted as sentence beginning.
Preposition: 5.0 2.5761589404 194% => OK
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 23.0 21.2450331126 108% => OK
Sentence length SD: 54.537973308 49.2860985944 111% => OK
Chars per sentence: 120.076923077 110.228320801 109% => OK
Words per sentence: 23.0 21.698381199 106% => OK
Discourse Markers: 12.0769230769 7.06452816374 171% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 7.0 4.33554083885 161% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 3.0 4.27373068433 70% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.303144901782 0.272083759551 111% => OK
Sentence topic coherence: 0.0985262631352 0.0996497079465 99% => OK
Sentence topic coherence SD: 0.0634489258987 0.0662205650399 96% => OK
Paragraph topic coherence: 0.165491555136 0.162205337803 102% => OK
Paragraph topic coherence SD: 0.0123069580588 0.0443174109184 28% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
automated_readability_index: 14.7 13.3589403974 110% => OK
flesch_reading_ease: 48.13 53.8541721854 89% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 12.3 11.0289183223 112% => OK
coleman_liau_index: 13.29 12.2367328918 109% => OK
dale_chall_readability_score: 9.58 8.42419426049 114% => OK
difficult_words: 91.0 63.6247240618 143% => OK
linsear_write_formula: 13.5 10.7273730684 126% => OK
gunning_fog: 11.2 10.498013245 107% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 Out of 30
Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.