Of the three common commercial fishing techniques listed, which causes the most damage to sea bottom ecosystems?Multiple choice question.LongliningTrawlingSeining

Which of the following is a direct impact of overfishing on biodiversity?a.Improved water qualityb.Loss of marine habitatsc.Increased fish populationd.Enhanced coral reef health

Which of these is not an example of sustainable fishing?Banning fishing in the breeding seasonSetting quotas on numbers of fish that can be caughtFish farming (of caged fish)Decreasing the size of the holes in fishing nets2What causes eutrophication?Excessive use of fertilisersCombustion of fossil fuelsMining for fossil fuelDeforestation3What is meant by the term ‘extinction’?A species has decreased in number, but then recoversA species has completely died outA species has increased in numberA new species is formed by natural selection4Which of the following activities does not help to protect endangered species?Introducing non-indigenous speciesMeasures to prevent poachingCapturing and culling non-indigenous speciesCaptive breeding programmes

Benthic ecosystems are important, but threatened largely by fishing. What might help solve this issue and help these slow growing ecosystems to recover?

How can fishing impact reef ecosystems and marine species?   Select ALL correct optionsFishing can create bycatch, killing non-target species like turtles.1Discarded nets, lines and hooks can entangle animals.2Taking organisms from the ocean does not harm marine species.3Fishing helps to keep the ocean clean by removing organic matter.

What type of fish introduced from Asia has become a problem in the Mississippi River system because it grows and reproduces quickly, damaging native ecosystems?Multiple choice question.CarpEelSturgeonCatfish