Tivela stultorum

FMIB_52934_Tivela_crassatelloides

Tivela stultorum, commonly known as the Pismo clam, is a species of bivalve mollusk in the family Veneridae. This species is native to the eastern Pacific Ocean, particularly along the coast of California and Baja California.

Description

The Tivela stultorum has a thick, heavy shell that can grow up to 15 centimeters in length. The exterior of the shell is typically white to light brown, often with darker concentric rings. The interior of the shell is smooth and white, sometimes with a purple hue near the hinge.

Habitat

Tivela stultorum is found in sandy substrates in the intertidal and subtidal zones. They are commonly found buried in sand at depths ranging from the low tide line to about 30 meters. These clams prefer areas with strong wave action, which helps to provide them with a steady supply of food.

Distribution

The range of Tivela stultorum extends from Pismo Beach, California, which is named after the clam, to Baja California in Mexico. They are particularly abundant in the central and southern parts of their range.

Ecology

Tivela stultorum is a filter feeder, drawing in water through its siphons and filtering out plankton and other small particles for food. This species plays a significant role in the ecosystem by helping to maintain water quality and serving as prey for various predators, including sea otters, seagulls, and humans.

Human Use

The Pismo clam has been harvested by humans for centuries. It was once a significant food source for indigenous peoples and later became popular among recreational clam diggers. Overharvesting and habitat destruction have led to a decline in their populations, and there are now regulations in place to help protect and manage the species.

Conservation

Due to overharvesting and habitat loss, the population of Tivela stultorum has declined in many areas. Conservation efforts include regulated harvesting, habitat protection, and public education about sustainable practices. In some regions, there are strict limits on the number and size of clams that can be collected.

See also

• Bivalvia
• Veneridae
• Pismo Beach, California
• Filter feeder