Imagine a chemical spills into a lake. At levels of 10 part per 1000, this chemical causes reduced fertility in Rainbow Trout (a type of fish), and at 20 parts in 1000 it is lethal to Rainbow Trout. It is not toxic for fish in water at the concentration present at the time of the spill, but it will biomagnify in the invertebrate prey that trout feed on. The table below shows the concentration of the chemical in the invertebrates in the years after the spill. Chemical concentration in invertebrates (parts per 1000) Year after spill 0 1 2 3 1 5 7 C. 10 18 20 21 4 5 6 Based on this information, answer the following questions. a. In what year following the spill will the birth rate of trout decrease? b. In what year will the mortality rate of the trout increase?

Imagine a chemical spills into a lake. At levels of 10 part per 1000, this chemical causes reduced fertility in Rainbow Trout (a type of fish), and at 20 parts in 1000 it is lethal to Rainbow Trout. It is not toxic for fish in water at the concentration present at the time of the spill, but it will biomagnify in the invertebrate prey that trout feed on. The table below shows the concentration of the chemical in the invertebrates in the years after the spill. Chemical concentration in invertebrates (parts per 1000) Year after spill 0 1 2 3 1 5 7 C. 10 18 20 21 4 5 6 Based on this information, answer the following questions. a. In what year following the spill will the birth rate of trout decrease? b. In what year will the mortality rate of the trout increase?

Nutrition Now

8th Edition

ISBN:9781337415408

Author:Brown

Publisher:Brown

Chapter21: Phytochemicals

Section: Chapter Questions

Problem 12RQ

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