Reading passage:
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.
Both reading and listening part discuss the subject of tuna farming. While the article expresses several concerns about tuna farming, the professor points out some recently discovered solutions.
First of all, the text indicates the problem of preventing female tuna from laying eggs. On the other hand, the lecturer introduces a breakthrough that scholars found and it is injecting hormones to female fishes, so they can reproduce without any risk of getting the disease.
Secondly, it is mentioned in the passage that farming tuna has loads of cost for farmers since their food should be full of protein and it is so expensive. The man, however, argues that it is not necessary to gain needed protein just from other fishes, as some plants can be a great alternative resource of that for tuna since they are cheaper and at the same time, have all nutrients and materials that the fish needs. So by using these plants, the cost of farming can decrease.
Third, the writer illustrates the danger of some parasites for these fishes that lives in their blood that can weaken them and cause death and illness in fish, but the lecturer claims that some scientists had research on this issue and they found that because the tuna swim deeper in the seas, their blood flukes will stop from harming them.
Transition Words or Phrases used:
but, first, however, second, secondly, so, third, while, first of all, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 7.0 10.4613686534 67% => OK
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 9.0 7.30242825607 123% => OK
Relative clauses : 9.0 12.0772626932 75% => More relative clauses wanted.
Pronoun: 24.0 22.412803532 107% => OK
Preposition: 27.0 30.3222958057 89% => OK
Nominalization: 0.0 5.01324503311 0% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1084.0 1373.03311258 79% => OK
No of words: 222.0 270.72406181 82% => More content wanted.
Chars per words: 4.88288288288 5.08290768461 96% => OK
Fourth root words length: 3.8600083453 4.04702891845 95% => OK
Word Length SD: 2.34376256321 2.5805825403 91% => OK
Unique words: 137.0 145.348785872 94% => More unique words wanted.
Unique words percentage: 0.617117117117 0.540411800872 114% => OK
syllable_count: 319.5 419.366225166 76% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 8.0 13.0662251656 61% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 27.0 21.2450331126 127% => The Avg. Sentence Length is relatively long.
Sentence length SD: 93.0010080591 49.2860985944 189% => OK
Chars per sentence: 135.5 110.228320801 123% => OK
Words per sentence: 27.75 21.698381199 128% => OK
Discourse Markers: 11.0 7.06452816374 156% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 2.0 4.33554083885 46% => More positive sentences wanted.
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: 0.213664278563 0.272083759551 79% => OK
Sentence topic coherence: 0.088154517803 0.0996497079465 88% => OK
Sentence topic coherence SD: 0.0385370150848 0.0662205650399 58% => OK
Paragraph topic coherence: 0.115706454021 0.162205337803 71% => OK
Paragraph topic coherence SD: 0.0439410206989 0.0443174109184 99% => OK
Essay readability:
automated_readability_index: 15.4 13.3589403974 115% => OK
flesch_reading_ease: 60.99 53.8541721854 113% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.5 11.0289183223 104% => OK
coleman_liau_index: 11.32 12.2367328918 93% => OK
dale_chall_readability_score: 8.75 8.42419426049 104% => OK
difficult_words: 53.0 63.6247240618 83% => More difficult words wanted.
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 12.8 10.498013245 122% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
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Rates: 83.3333333333 out of 100
Scores by essay e-grader: 25.0 Out of 30
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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.