Which Of The Following Ocean Areas Would Be A True Protected Area, Free Of Fishing?

Which Of The Following Ocean Areas Would Be A True Protected Area, Free Of Fishing?

Which of the following ocean areas would be true protected area free of fishing?

Which of the following ocean areas would be a true protected area, free of fishing? Marine reserves would be off limits completely to fishing and would keep marine ecosystems intact.

What portion of the ocean contains the highest biodiversity and the greatest productivity?

The littoral zone generally has high productivity and high biodiversity. The limnetic zone is the top layer of lake water away from shore. This zone covers much of the lake’s surface, but it is only as deep as sunlight can penetrate. This is a maximum of 200 meters.

Why are areas with physical structures underwater very suitable for fishing?

Why are areas with physical structures underwater very suitable for fishing? The structures provide shelter and safety for fish. The levels of dissolved oxygen at the surface of water can decrease dramatically and kill marine organisms when which of the following are out of balance in the ocean?

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Which coastal habitat is a mixing place of fresh and saltwater?

An estuary is a partially enclosed, coastal water body where freshwater from rivers and streams mixes with salt water from the ocean. Estuaries, and their surrounding lands, are places of transition from land to sea.

What areas of the ocean are protected?

Marine protected areas span a range of habitats, including the open ocean, coastal areas, intertidal zones, estuaries, and the Great Lakes.

What kind of research do governments use to choose which ocean areas to protect?

Governments rely on oceanographic research in order to know what marine areas deserve protection.

What 4 effects on the food chain does ocean acidification have?

Ocean acidification also makes it difficult for crabs, oysters and urchins to build the shells they need to survive. Some hatcheries have lost 80% of their oyster production. When the small animals die off, there’s less food for larger fish and marine mammals. Pteropods, for instance, make up 60% of pink salmon diet.

Which ocean has the most biodiversity?

It contains 45,389 km of coastline. There are 400 known fish species living in Arctic seas and adjacent waters, most living on or near the bottom. So, based on global fisheries and the overall biodiversity of coral reef ecosystems, the Pacific Ocean wins for most marine life.

What is ocean diversity?

Biological diversity in the ocean is the variety of life that exists in the ocean. This includes all plants and animals and the ecosystems in which they live and interact with. All organisms, both plants and animal, play an important role in their environment.

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Which fishing method is the least harmful to the environment?

Trawling: It consists of throwing big nets into the seabed, which are ballasted and then pulled for their collection, so they capture everything in their path. This includes species which will be of no use, coral destruction, etc. It is one of the least selective fishing methods, and very harmful to sea bottoms.

What is the most sustainable fishing method?

Rod-and-reel fishing results in less bycatch because non-targeted species can be released immediately. Additionally, only one fish is caught at a time, preventing overfishing. For commercial fishers, rod-and reel- fishing is a more sustainable alternative to long lining.

What is the most common fish in the sea?

The Cyclothone Bristlemouth is not only the most common fish in the world, but probably the most common vertebrate animal of any kind too. Marine biologists estimate that there may be upwards of several trillion of these shiny 3-inch long little guys swimming around in the ocean right now.

Where does fresh and salt water meet?

Freshwater meets saltwater wherever a river meets an ocean. This happens at estuaries and deltas. In these places the freshwater often stays above the saltwater, just like in the tennis ball container.

What will be formed when freshwater is mixed with saltwater?

Tidal currents, which act independently of estuarine circulation, also add to the turbulence, mixing the salt and fresh waters to produce brackish water in the estuary.

What is called salinity?

Oligohaline. 0.5-5. The salinity of seawater is defined as the total amount by weight of dissolved salts in one kilogram of seawater. Salinity is expressed in the unit g / kg, which is often written as ppt (part per thousand) or ‰ (permil).

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