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 the reading passage and the lecturer discuss the posibility of tuna farming. While the reading passage brings up three problems for tuna farming, the lecturer provides some solution to refute them.
First, the writer asserts that female tuna do not lay eggs in cages, so the farmers should catch more young wild tuna to sell them after a while. Consequently, the population of wild tuna decrease. On the other hand, the professor says that scientists discover hormones that cause female tuna lay on their eggs. Thus, the writer's mentioned problem does not occure.
Second, the author argues that tuna farming is not profitable because the tuna needs a lot of proteins and nutrients to grow, around 70 kilograms of food a day. This food should be supplyed by small fish so it would be a expensive process. Conversely, the professor acclaims that requiered proteins and nutrients can be provided by plants. These plants can provide all the nutrients, and they are significantly cheaper than small fishes. Thus, this project will be benefitial.
Finally, the writer declares that most of the tunas suffered from the parasite infestation which lead to death of some tunas. In contrast, the lecturer states that tuna already go to deaper depth of ocean. They can thrive and endure in these depths. So, it whould be possible of endure in their farms period.
Grammar and spelling errors:
Line 5, column 220, Rule ID: EN_A_VS_AN
Message: Use 'an' instead of 'a' if the following word starts with a vowel sound, e.g. 'an article', 'an hour'
Suggestion: an
...e supplyed by small fish so it would be a expensive process. Conversely, the prof...
^
Transition Words or Phrases used:
consequently, conversely, finally, first, if, second, so, thus, while, in contrast, 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: 7.0 5.04856512141 139% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 19.0 22.412803532 85% => OK
Preposition: 25.0 30.3222958057 82% => OK
Nominalization: 3.0 5.01324503311 60% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1139.0 1373.03311258 83% => OK
No of words: 227.0 270.72406181 84% => More content wanted.
Chars per words: 5.01762114537 5.08290768461 99% => OK
Fourth root words length: 3.88156143495 4.04702891845 96% => OK
Word Length SD: 2.46894193543 2.5805825403 96% => OK
Unique words: 141.0 145.348785872 97% => OK
Unique words percentage: 0.621145374449 0.540411800872 115% => OK
syllable_count: 336.6 419.366225166 80% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 3.25607064018 154% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 15.0 13.0662251656 115% => OK
Sentence length: 15.0 21.2450331126 71% => The Avg. Sentence Length is relatively short.
Sentence length SD: 36.4681900961 49.2860985944 74% => OK
Chars per sentence: 75.9333333333 110.228320801 69% => OK
Words per sentence: 15.1333333333 21.698381199 70% => OK
Discourse Markers: 6.73333333333 7.06452816374 95% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 10.0 4.27373068433 234% => Less facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.221075622795 0.272083759551 81% => OK
Sentence topic coherence: 0.0694233886349 0.0996497079465 70% => OK
Sentence topic coherence SD: 0.0511703122626 0.0662205650399 77% => OK
Paragraph topic coherence: 0.125972584485 0.162205337803 78% => OK
Paragraph topic coherence SD: 0.0206434916911 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: 9.8 13.3589403974 73% => Automated_readability_index is low.
flesch_reading_ease: 64.71 53.8541721854 120% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 8.0 11.0289183223 73% => OK
coleman_liau_index: 11.24 12.2367328918 92% => OK
dale_chall_readability_score: 8.62 8.42419426049 102% => OK
difficult_words: 61.0 63.6247240618 96% => OK
linsear_write_formula: 6.5 10.7273730684 61% => OK
gunning_fog: 8.0 10.498013245 76% => OK
text_standard: 8.0 11.2008830022 71% => OK
What are above readability scores?
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Rates: 60.0 out of 100
Scores by essay e-grader: 18.0 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.