marine biology

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Across
  1. 2. A fishing net that is hung vertically so that fish get trapped in it by their gills.
  2. 5. A synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc., that can be molded into shape
  3. 6. A fishing net or seine that can be drawn into the shape of a bag, used for catching shoal fish.
  4. 7. The draining away of water (or substances carried in it) from the surface of an area of land, a building or structure
  5. 9. Clean out the bed of (a harbor, river, or other area of water) by scooping out mud, weeds, and rubbish with a dredge
  6. 10. Act (MMPA) of 1972 was the first article of legislation to call specifically for an ecosystem approach
  7. 13. any natural resource (as wood or solar energy) that can be replenished naturally with the passage of time
  8. 14. A large baglike net dragged by a boat along the bottom of a fishing bank
  9. 15. the increase in concentration of a substance
  10. 16. unwanted marine creatures that are caught in the nets while fishing for another species
  11. 17. the removal of salt (especially from sea water)
  12. 18. Originating or occurring naturally in a particular place
  13. 19. liquid mixture of hydrocarbons that is present in suitable rock strata and can be extracted and refined
  14. 21. Deplete the stock of fish in (a body of water) by too much fishing
  15. 22. The cultivation of fish or other marine life for food.
  16. 23. The variety of life in the world or in a particular habitat or ecosystem.
  17. 24. A large group of simple nonflowering plants containing chlorophyll but lacking true stems, roots, leaves, and vascular tissue
  18. 25. There are various dolphin safe labels used for canned tuna to imply that the fish has been caught without harming or killing dolphins
Down
  1. 1. the accumulation of substances, such as pesticides
  2. 3. also called methane hydrate, hydromethane, methane ice or "fire ice" is a solid clathrate compound
  3. 4. A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms
  4. 8. The maximum level at which a natural resource can be routinely exploited without long-term depletion
  5. 11. Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land
  6. 12. Minerals, fossil fuels, and other materials present in essentially fixed amounts (within human time scales) in our environment
  7. 20. Tending to spread prolifically and undesirably or harmfully.