For example, the trematode parasite responsible for schistosomiasis is vectored by snails of several genera … Seafood feeds the masses, and the more caught the more food choices people have.While that is promising, overfishing can also lead to things that are drastic to the ecosystem. 10. Overfishing is the greatest threat to the biodiversity of the world’s oceans, and contemporary information published for fisheries in the United States can serve as an example of the magnitude of the problem. Overfishing is perhaps the most acknowledged anthropogenic stress on reef systems and has a long history of impact on reef systems (Jackson et al., 2001). For example: - Predators, particularly large ones like sharks, dolphins, whales, and tuna, are susceptible to nets. Overfishing has expanded the economy and created more sources of income. Overfishing in the Past . Whale blubber was used to create candles, lamp oil and the whalebone was used in everyday items. In many cases they are innocent bystanders, caught in a trawler’s nets. Continue reading to find out what people can do to save the ocean and its marine creatures. One of the greatest dangers of overfishing is the chaos that it creates in a perfectly balanced ecosystem. Overfishing refers to fishing mortality (F), or the rate of fish killed by catching them ... For example, orangutan mothers spend 9 years raising their babies before they are ready to set off on their own. Premature Reproduction. For example, recent studies suggest that overfishing of large shark species has had a ripple effect in the shark's food chain, increasing the number of species, such as rays, that are usual prey for large sharks, which result in declining stocks of smaller fish and shellfish favoured by these species. Investing time and energy into offspring is a K-selected reproductive strategy. Overfishing occurs in two ways: Legal, or unregulated, and Illegal. Overfishing disrupt the delicate nature of marine ecosystem. A salmonid fish and hence closely related to salmon and trout, the Blackfin Cisco was once plentiful in the Great Lakes, but recently succumbed to a combination of overfishing and predation by not one, but three, invasive species: the Alewife, the Rainbow Smelt, and a genus of sea lamprey. Overfishing is catching too many fish at once, so the breeding population becomes too depleted to recover. Reef fisheries provide a key source of household protein and income for many communities. Overfishing is a non-sustainable way of fishing and it is a serious problem that we are currently trying to solve. Overfishing often goes hand in hand with wasteful types of commercial fishing that haul in massive amounts of unwanted fish or other animals, which are then discarded. If this occurs, there balance of nature may change, and it will indirectly affect human too. 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