trail gill nets that cover several miles and catch any sea animals who venture near,5 or longlines bristling with thousands. Ml (1/25/11) 12 Ovetz, Robert. The following are some specific examples that illustrate fishings impact on different species. A major scientific study of coral reefs in 22 Caribbean nations found that many large predator species (like barracuda, Nassau groupers and sharks) have virtually vanished from these ecosystems mostly due to commercial fishing. Case 1: Sharks, sharks occupy the top spot in the aquatic food chain, but they are also among the oceans most threatened species. Ml (1/25/11) 25 Interesting Ocean Facts.
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As a result, populations of tuna, flounder, cod, halibut, swordfish, and other large predatory fish materials and methods section of thesis who are among the most-consumed have plummeted by 90 percent since the 1950s, causing the numbers of smaller plankton-eating fish to increase.7. The corals that comprise the reefs themselves are actually tiny animals who bind together in colonies by collectively excreting a calcium carbonate skeleton for protection. Scientists studying the aftermath of the tsunami documented fewer human deaths and less property damage in areas with intact mangrove forests compared to those where they had been decimated. Farmed fish are densely packed together in pens for maximum production efficiency, but the fecal matter that accumulates in these filthy conditions can create algal blooms that deplete the water around aquaculture facilities of oxygen so that these areas can no longer support sea life.23 Deadly. Study: 90 of the oceans edible species may be gone by 2048.