This is the second in a series of ocean infographics by artist Don Foley. These infographics also appear in Oceana board member Ted Danson’s book, “Oceana: Our Endangered Oceans and What We Can Do to Save Them.”
With shark week fast approaching, how about a shark-related infographic to whet your appetite?
Today’s infographic illustrates how overfishing fundamentally alters ocean ecosystems, leading to fewer and smaller fish over time.
If overfishing isn’t stopped, the largest fish like sharks, tuna, cod, and salmon eventually run out and overfishing expands to previously untargeted, smaller species, some of which were considered undesirable. As a result, the world catch is now primarily made up of small fish like pollock rather than large predators like grouper, and this shift to smaller and smaller species over time is called “fishing down the food chain.”
Fig. A: Sharks and killer whales are apex predators that feed on large fish in the food chain.
Fig. B: Tuna and salmon are large fish that feed on schooling fish, squid and shellfish
Fig. C: Sardines, pollock and squid are small prey species that form large schools and feed on microscopic animals, plants and leftovers.
Fig. D: Zooplankton are microscopic animals that eat tiny plants.
Fig. E: Phytoplankton make sugar using solar energy, just like plants on land, and form the base of the food web.
- Ocean Roundup: Healthy Corals Mean More Sharks, Extinct Dolphin Found in Peruvian Desert, and More Posted Thu, September 11, 2014
- Ocean Roundup: Shark-Eating Dinosaur Fossils Discovered, Germany Paving Way for Cheaper Wind Energy, and More Posted Mon, September 15, 2014
- Oceana Magazine: DiCaprio Funds Conservation Across the Entire Eastern Pacific Posted Thu, September 11, 2014
- Ocean Roundup: Leatherback Coloration May Play Important Role, UK Sees New Voluntary Seafood Labeling Scheme, and More Posted Wed, September 17, 2014
- Ocean Roundup: Western Australia Recommended to Halt Shark Cull, Orca Pod Saves Member from Fishing Gear, and More Posted Fri, September 12, 2014