Reference no: EM132496653

Question

Scientists have noticed a disturbing trend in the freshwater ecosystems in North America: a large number of male fish are found to contain female egg cells growing inside their testes. The feminization of male fish is called intersex, and its exact cause is still baffling many scientists.

Many studies have shown that intersex can be induced when male fish are exposed to endocrine disruptors. However, it is easier to demonstrate the direct cause and effect in a laboratory environment where the fish are only exposed to a single endocrine disruptor. In nature, there are many other variables such as low oxygen levels or warmer water temperatures that could also cause feminization in fish.

1) Identify two reasons why we should be concerned about the feminization of fish.

2) What are some of the sources of endocrine disruptors found in the freshwater bodies? Identify at least four sources.

3) What can we, as a society or as individuals, do to protect our ecosystems and watersheds from endocrine disruptors? Please be creative and try to come up with your own unique ideas and suggestions.