Both of the reading passage and the lecture are about tuna farming. The reading passage presents three reasons to oppose that tuna farming is not available, including reducing wild tuna populations, the high cost to raise tuna, and the dangerous of being infested by blood flukes. However, the professor disagrees with these ideas.

First, the reading states that the female do not lay eggs in captivity so that farmers have to capture numerous yonung wild tuna to keep their farms going, which caused the wild pupulations to decline worse. On the contrary, the professor argues that there might be solutions such as injecting harmone into female tuna that are captured. Under this circunstance, tuna farms are no longer need to capture young wild tuna to keep farms going. Therefore, with this advicement, the first reason that tuna farming can cause wild pupulations to decline is unstandable.

Second, the reading passage shows that the food cost to rase tuna is too high to remain profitable since tuna feed exclusively and large amounts of small fish. Nevertheless, the professor refutes that some kinds of plants with high nutrients and proteins can also meet the requirement. And these plants are cheap enough to maintain the profits. Under this circunstance, the problem that the food cost is high might be solved.

Third, the reading passage contends that tuna farming have problem with infestations of blood flukes, which causes diseases or even death for tuna. However, the professor again opposes that putting the cages offshore and in the deep water might alleviate the problem. Because blood flukes are not available when farms are offshore and hard to survive in deep water. In that case, tuna farming seems available with lower infestations of blood flukes.