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.
The author states that some problems have arisen reagrding farming tuna an feeding them in cages. The lecturer, on the other hand, suggests some possible solutions.
The first problem mentioned by the author is that farming tuna and keeping female tunas in cage prevents them from laying eggs, as a result of the less number of reproduction, young tunas will be catched by farmers and their population will be declined. To tackle this issue, the lecturer states that due to the advanced breakthrough of science, female tuna can be injected by hormones in order to lay eggs. As a result, new tuna will be presented to replace the tuna that are sold.
Furthermore, the reading highlights the high cost of feeding tunas as author's concern, because these animals need a large amout of protein and other nutrients which can be gained from other fish. As a feasible solution, the professor asserts that there are some plants containg the high-protein and other essecial nutrients required for tunas to eat. So, tunas will be provided by the high amount of foods they need, through a less expensive approach.
The final challenge mentioned by the writer is that present/existance of some parasites may infect the tunas and decline their population. On the other side, the speaker proposes that by removing the cages into deeper water this problem get solved. He states the example of experiments have done on Australian farms which resuted in the fact that blood flukes, a certain species of parasite, will not be able to infect fish in deeper water due to their relavance to the surrounding and offshore environment.
Grammar and spelling errors:
Line 1, column 73, Rule ID: EN_A_VS_AN
Message: Use 'a' instead of 'an' if the following word doesn't start with a vowel sound, e.g. 'a sentence', 'a university'
Suggestion: a
...lems have arisen reagrding farming tuna an feeding them in cages. The lecturer, on...
^^
Line 2, column 1, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
...and, suggests some possible solutions. The first problem mentioned by the author i...
^^^
Transition Words or Phrases used:
first, furthermore, may, so, as to, as a result, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 11.0 10.4613686534 105% => OK
Auxiliary verbs: 10.0 5.04856512141 198% => OK
Conjunction : 6.0 7.30242825607 82% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 18.0 22.412803532 80% => OK
Preposition: 35.0 30.3222958057 115% => OK
Nominalization: 8.0 5.01324503311 160% => OK
Performance on vocabulary words:
No of characters: 1344.0 1373.03311258 98% => OK
No of words: 270.0 270.72406181 100% => OK
Chars per words: 4.97777777778 5.08290768461 98% => OK
Fourth root words length: 4.05360046442 4.04702891845 100% => OK
Word Length SD: 2.6369642104 2.5805825403 102% => OK
Unique words: 151.0 145.348785872 104% => OK
Unique words percentage: 0.559259259259 0.540411800872 103% => OK
syllable_count: 411.3 419.366225166 98% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 4.0 1.25165562914 320% => Less adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 11.0 13.0662251656 84% => 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: 24.0 21.2450331126 113% => OK
Sentence length SD: 63.2697230217 49.2860985944 128% => OK
Chars per sentence: 122.181818182 110.228320801 111% => OK
Words per sentence: 24.5454545455 21.698381199 113% => OK
Discourse Markers: 6.0 7.06452816374 85% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 6.0 4.33554083885 138% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.26391294216 0.272083759551 97% => OK
Sentence topic coherence: 0.101053102505 0.0996497079465 101% => OK
Sentence topic coherence SD: 0.0628342969067 0.0662205650399 95% => OK
Paragraph topic coherence: 0.156408362032 0.162205337803 96% => OK
Paragraph topic coherence SD: 0.0209512566204 0.0443174109184 47% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 14.3 13.3589403974 107% => OK
flesch_reading_ease: 55.58 53.8541721854 103% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.5 11.0289183223 104% => OK
coleman_liau_index: 11.9 12.2367328918 97% => OK
dale_chall_readability_score: 9.21 8.42419426049 109% => OK
difficult_words: 75.0 63.6247240618 118% => OK
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 11.6 10.498013245 110% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
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Rates: 83 out of 100
Scores by essay e-grader: 25 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.