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 reading and the lecture are about tuna farming. While the author of the article argues that there are several problems that cannot be solved, the lecture disputes the arguments made in the article. His position is that there are three solutions to these problems.
According to the reading passage wild female tuna cannot lay eggs in ocean cages because they are in captivity so tuna farmers should capture young tuna to stock their farms, however, the lecture suggests that scientists found that they could injecting hormones to female tuna that they can lay eggs. This argument is challenged by the lecturer. He claims that there are any risks for females’ tuna in hormones injections. Additionally, he points out that tuna farming can be done without reducing wild tuna populations.
Secondly, the author suggests that tuna farming requires high costs to feed tuna with a specific type of fish. In the article, it is said that farmers can decrease the cost by feeding them with plants. The lecturer, however, asserts that certain plants that are high in protein can be processed to make an inexpensive food. He goes on to say that this food made from plants could supply tuna with all protein and nutrients they need.
Finally, in opposition to the author who believes infestations of a parasite called blood flukes had damaged tuna, the lecturer thinks that blood flukes cannot maintain their life cycles if they were in the offshore. He notes that if tuna cages were moved into deeper waters the blood flukes can not thrive to tuna and damage them.
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Grammar and spelling errors:
Line 2, column 244, Rule ID: DID_BASEFORM[1]
Message: The verb 'could' requires the base form of the verb: 'inject'
Suggestion: inject
...s that scientists found that they could injecting hormones to female tuna that they can l...
^^^^^^^^^
Transition Words or Phrases used:
finally, however, if, second, secondly, so, while
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 14.0 10.4613686534 134% => OK
Auxiliary verbs: 12.0 5.04856512141 238% => Less auxiliary verb wanted.
Conjunction : 3.0 7.30242825607 41% => More conjunction wanted.
Relative clauses : 16.0 12.0772626932 132% => OK
Pronoun: 33.0 22.412803532 147% => Less pronouns wanted
Preposition: 31.0 30.3222958057 102% => 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: 1301.0 1373.03311258 95% => OK
No of words: 264.0 270.72406181 98% => OK
Chars per words: 4.92803030303 5.08290768461 97% => OK
Fourth root words length: 4.03089032464 4.04702891845 100% => OK
Word Length SD: 2.33893157132 2.5805825403 91% => OK
Unique words: 147.0 145.348785872 101% => OK
Unique words percentage: 0.556818181818 0.540411800872 103% => OK
syllable_count: 400.5 419.366225166 96% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 7.0 3.25607064018 215% => Less pronouns wanted as sentence beginning.
Article: 6.0 8.23620309051 73% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 13.0 13.0662251656 99% => OK
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 67.6247040046 49.2860985944 137% => OK
Chars per sentence: 100.076923077 110.228320801 91% => OK
Words per sentence: 20.3076923077 21.698381199 94% => OK
Discourse Markers: 3.76923076923 7.06452816374 53% => More transition words/phrases wanted.
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 : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 6.0 4.27373068433 140% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.287186959472 0.272083759551 106% => OK
Sentence topic coherence: 0.0971043153937 0.0996497079465 97% => OK
Sentence topic coherence SD: 0.0792628234754 0.0662205650399 120% => OK
Paragraph topic coherence: 0.158840110485 0.162205337803 98% => OK
Paragraph topic coherence SD: 0.0692177825938 0.0443174109184 156% => OK
Essay readability:
automated_readability_index: 11.9 13.3589403974 89% => Automated_readability_index is low.
flesch_reading_ease: 59.64 53.8541721854 111% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.0289183223 90% => OK
coleman_liau_index: 11.31 12.2367328918 92% => OK
dale_chall_readability_score: 8.46 8.42419426049 100% => OK
difficult_words: 64.0 63.6247240618 101% => OK
linsear_write_formula: 9.0 10.7273730684 84% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 10.0 11.2008830022 89% => OK
What are above readability scores?
---------------------
Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 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.