Red Triangle (Pacific Ocean)

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Approximate boundaries of the Red Triangle Northern California red triangle.jpg
Approximate boundaries of the Red Triangle

The Red Triangle is the colloquial name of a roughly triangle-shaped region off the coast of northern California, extending from Bodega Bay, north of San Francisco, out slightly beyond the Farallon Islands, and down to the Big Sur region, south of Monterey. The area has a very large population of marine mammals, such as elephant seals, harbor seals, sea otters and sea lions, which are favored prey of great white sharks. [1] Around thirty-eight percent of recorded great white shark attacks on humans in the United States have occurred within the Red Triangle—eleven percent of the worldwide total. [2] The area encompasses the beaches of the heavily populated San Francisco Bay Area, and many people enjoy surfing, windsurfing, swimming and diving in these waters. [3]

Contents

Geography

The Red Triangle is defined by its vertices: the northern vertex is Bodega Bay (Bodega Head), the western vertex is the Farallones, and the southern vertex is Big Sur or Monterey Bay. [4] The movement of sharks and other large marine animals in this region were studied starting in 1999 under the Tagging of Pacific Predators (TOPP) program, an international collaboration. [5] TOPP found that white sharks in the Red Triangle are genetically distinct from others in the Pacific Ocean, such as those found off South Africa and Australia. [5]

Schedule

The population of northeastern Pacific white sharks tend to congregate along the north/central California coast each fall, then leave the area in December for the deep ocean approximately halfway between California and Hawaii. This region is referred to by TOPP as the White Shark Café. [5] Female whites tend to visit the Gulf of the Farallones every two years, which researchers believe to be based on the shark reproductive cycle. [4] Adult Great White Sharks are no longer present in the Red Triangle during the month of May, and start to return in August. [6]

Related Research Articles

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<span class="mw-page-title-main">Monterey Bay Aquarium</span> Nonprofit public aquarium in Monterey, California, United States

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<span class="mw-page-title-main">Monterey Bay</span> Large salt water bay in California, United States

Monterey Bay is a bay of the Pacific Ocean located on the coast of the U.S. state of California, south of the San Francisco Bay Area. San Francisco itself is further north along the coast, by about 75 miles, accessible via Highway 1 and Highway 280.

<span class="mw-page-title-main">Northern California</span> American geographic and cultural region

Northern California is a geographic and cultural region that generally comprises the northern portion of the U.S. state of California. Spanning the state's northernmost 48 counties, its main population centers include the San Francisco Bay Area, the Greater Sacramento area, the Redding, California, area south of the Cascade Range, and the Metropolitan Fresno area. Northern California also contains redwood forests, along with most of the Sierra Nevada, including Yosemite Valley and part of Lake Tahoe, Mount Shasta, and most of the Central Valley, one of the world's most productive agricultural regions.

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Bodega Bay is a shallow, rocky inlet of the Pacific Ocean on the coast of northern California in the United States. It is approximately 5 mi (8 km) across and is located approximately 40 mi (60 km) northwest of San Francisco and 20 mi (32 km) west of Santa Rosa. The bay straddles the boundary between Sonoma County to the north and Marin County to the south. The bay is a marine habitat used for navigation, recreation, and commercial and sport fishing.

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The Monterey Bay National Marine Sanctuary (MBNMS) is a federally protected marine area offshore of California's Big Sur and central coast in the United States. It is the largest US national marine sanctuary and has a shoreline length of 276 miles (444 km) stretching from just north of the Golden Gate Bridge at San Francisco to Cambria in San Luis Obispo County. Supporting one of the world's most diverse marine ecosystems, it is home to numerous mammals, seabirds, fishes, invertebrates and plants in a remarkably productive coastal environment. The MBNMS was established in 1992 for the purpose of resource protection, research, education, and public use.

<span class="mw-page-title-main">Golden Gate Biosphere Network</span>

The Golden Gate Biosphere Network is an internationally recognized voluntary coalition of federal, state, and local government agencies, nonprofit organizations, universities, and private partners within the Golden Gate Biosphere region. The Network works towards protecting the biosphere region's biodiversity and conserving its natural resources to maintain the quality of life for people within the region. The Network has been part of the UNESCO Man and Biosphere Programme since 1988 and is part of the US Biosphere Network and EuroMAB. It is recognized by UNESCO due to the significant biodiversity of the region, as well as the Network's efforts to demonstrate and promote a balanced relationship between humans and the biosphere.

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References

  1. www.pbs.org
  2. "FLMNH Ichthyology Department: 1876-2010 World's Confirmed Unprovoked Attacks by White Sharks". ufl.edu. 24 January 2018.
  3. "Tracking Great Whites in The Red Triangle". pelagic.org.
  4. 1 2 Fimrite, Peter (22 September 2012). "Great white sharks back in Red Triangle". San Francisco Chronicle. Retrieved 4 July 2018.
  5. 1 2 3 "Unveiling the underwater ways of the white shark" (Press release). Stanford University. 15 February 2008. Retrieved 4 July 2018.
  6. "We Curated All of the Best Information About Great White Sharks Swimming in the San Francisco Bay". 28 March 2021.