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.
Wild tuna is a species of fish that is in high demand and overfishing in recent years has resulted in serious problems. The text addresses three challenges that this industry faces while the professor posits three potential solutions to those problems.
First, female tuna is unable to lay eggs under captivity so young tuna should be captured that can cause further population decline. According to the professor, researchers have developed hormones to inject to female tuna that can counter this problem. The injection of this hormone ensures that female tuna lay eggs in captivity.
Second, farm tunas are fed by costly protein-rich food that are produced from other fish which increases the cost of tuna farming. The professor, on the other hand, suggests that there are cheaper alternatives to that. For instance, tuna are fed processed plants which are high in protein and are substantially chaper.
Third, the infestition of tuna with blood fluke parasite has posited serious problems in certain regions. This parasite can hinder the fish growth and in some cases result in tuna death, causing extreme financial harms. Although it seems to be a big problem but this can be prevented by moving tuna to deeper waters, according to the lecturer. Blood flukes thrive in regions near shore yet they are weakened in deeper waters.
Transition Words or Phrases used:
but, first, second, so, third, while, for instance, in some cases, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 16.0 22.412803532 71% => OK
Preposition: 30.0 30.3222958057 99% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1123.0 1373.03311258 82% => OK
No of words: 218.0 270.72406181 81% => More content wanted.
Chars per words: 5.15137614679 5.08290768461 101% => OK
Fourth root words length: 3.84250218741 4.04702891845 95% => OK
Word Length SD: 2.54588808987 2.5805825403 99% => OK
Unique words: 134.0 145.348785872 92% => More unique words wanted.
Unique words percentage: 0.614678899083 0.540411800872 114% => OK
syllable_count: 342.9 419.366225166 82% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 4.0 8.23620309051 49% => 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: 12.0 13.0662251656 92% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 18.9566391184 49.2860985944 38% => The essay contains lots of sentences with the similar length. More sentence varieties wanted.
Chars per sentence: 93.5833333333 110.228320801 85% => OK
Words per sentence: 18.1666666667 21.698381199 84% => OK
Discourse Markers: 7.0 7.06452816374 99% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 8.0 4.45695364238 179% => 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: 0.256232511858 0.272083759551 94% => OK
Sentence topic coherence: 0.0939598247188 0.0996497079465 94% => OK
Sentence topic coherence SD: 0.0641017130193 0.0662205650399 97% => OK
Paragraph topic coherence: 0.146275587914 0.162205337803 90% => OK
Paragraph topic coherence SD: 0.012100005364 0.0443174109184 27% => 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: 11.9 13.3589403974 89% => Automated_readability_index is low.
flesch_reading_ease: 53.21 53.8541721854 99% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.3 11.0289183223 93% => OK
coleman_liau_index: 12.29 12.2367328918 100% => OK
dale_chall_readability_score: 9.6 8.42419426049 114% => OK
difficult_words: 70.0 63.6247240618 110% => OK
linsear_write_formula: 8.0 10.7273730684 75% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 10.0 11.2008830022 89% => OK
What are above readability scores?
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Rates: 71.6666666667 out of 100
Scores by essay e-grader: 21.5 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.