which of the following contributed most to the fish population dying during the 1970's?
the selections were: Salt, Toxic Waste, Predators, Mercury, or Iodine
Which do you think is the best answer?
salt
To determine which of the following factors contributed the most to the fish population dying during the 1970s, we will need to gather information about the possible causes and evaluate their impact. Unfortunately, you haven't provided a list of specific factors, so I don't have the necessary information to answer your question accurately.
However, to get started, here are some common factors that can contribute to fish population decline:
1. Pollution: Industrial waste, agricultural runoff, and untreated sewage can introduce toxic substances into water bodies, leading to fish kills.
2. Overfishing: Unsustainable fishing practices can deplete fish populations beyond their ability to reproduce and replenish.
3. Habitat destruction: Damming rivers, deforestation, and destruction of wetlands can disrupt fish habitats, affecting their breeding, feeding, and migratory patterns.
4. Water temperature and oxygen levels: Changes in water temperature and dissolved oxygen levels can impact fish physiology and make them more susceptible to diseases and stress.
5. Invasive species: Non-native species can outcompete native fish for resources and disrupt the balance of the ecosystem.
To determine which of these factors had the most significant impact on fish population decline during the 1970s, you can consult scientific research, reports, and studies from that period. Fisheries and environmental agencies, academic institutions, and historical records would be useful sources of information to explore.