Water shit i need to rmb Flashcards
(16 cards)
What is dredging?
Uses a metal-framed basket with a rake to lift oysters, clams, and scallops from the seabed into the basket.
What are the environmental problems associated with dredging?
Changes the ocean floor, damages seabed habitats, and destroys corals.
What is dynamite fishing?
Uses explosives to stun fish, causing them to float to the surface for easy harvesting.
What are the environmental problems associated with dynamite fishing?
Destroys riverbeds and aquatic habitats, causes long-lasting damage to ecosystems, and kills indiscriminately.
What is spearfishing?
Individuals dive and fish using a handheld spear gun.
What are the environmental problems associated with spearfishing?
Minimal impact; highly selective, no bycatch or habitat damage, no bait or gear loss pollution.
What is purse seining?
Encloses a shoal of fish with a wall of netting, then draws the bottom closed like a purse to trap fish. Used for dense shoals like tuna.
What are the environmental problems associated with purse seining?
Pollution from waste dumped overboard, oil spills, and lost fishing gear; plastics and metals are major pollutants.
What is longlining?
Stretches a fishing line up to 100 km with hooks at intervals to catch species like swordfish and tuna.
What are the environmental problems associated with longlining?
Bycatch of non-target species including seabirds and turtles, potential habitat damage from gear.
What are trammel nets?
Three layers of netting with a fine inner net; fixed to the seabed and hangs vertically to catch fish.
What are the environmental problems associated with trammel nets?
Moderate mortality of fish, bycatch including endangered species, some impact on benthic habitats but less than trawling.
What is bottom or beam trawling?
Cone-shaped nets towed across the seabed, herding fish into the net funnel.
What are the environmental problems associated with bottom or beam trawling?
Severe damage to seabed habitats, destruction of benthic communities, high bycatch rates.
What is rod and reel fishing?
Fishing using a rod and reel to catch fish individually.
What are the environmental problems associated with rod and reel fishing?
Can cause fish welfare issues, habitat disturbance from shore fishing, lead contamination from lost tackle, but generally low environmental impact compared to industrial methods.
