Bluefin Tuna Are Ocean Predators That Feed on a Variety

question 87

Multiple Choice

Bluefin tuna are ocean predators that feed on a variety of smaller fish, including herring, anchovies, sardines, bluefish, and mackerel.They maintain balance in these populations.Tuna are preyed on by some toothed whales and sharks, and their meat is prized by the Japanese as a source for sushi.Since World War II, human harvesting has depleted species numbers, leaving bluefins endangered.Conservationists say ecological extinction of bluefin tuna would have serious and unpredictable consequences.The most likely consequence is that loss of tuna would

• A) interrupt a trophic cascade, triggering effects throughout the food web.
• B) cause other species in the ecosystem to migrate to other areas in the ocean.
• C) increase biodiversity by giving their prey a chance to increase their populations.
• D) result in the rapid extinction of toothed whales and sharks, due to lack of food.
• E) result in collapse of all food webs throughout the ocean.

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