EMERITA ANALOGA PDF

Emerita analoga (Stimpson, ). Common name(s): Pacific sand crab, sand crab, mole crab. Synonyms: Hippa analoga, 3 cm preserved female. Scientific Name. Emerita analoga. Animal Type. Invertebrates. Diet. plankton, mostly dinoflagellates. Size. females: to 2 inches ( mm); males inches. Pacific Sand Crab (Mole Crab). Emerita analoga. Decapoda: Hippidae. Laguna Beach, Orange County, CA. 06/11/ © Peter J. Bryant. Back to Natural History.

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Emerita (genus) – Wikipedia

In both views the abdomen has been artificially extended. The carapace has three teeth in front and is smooth except for small, transverse ridges on the anterior portion.

Natural History No bigger than a thumb, a sand crab spends most of its time buried in shifting sand. Retrieved July 21, Photos by Dave Cowles.

emegita After the wave retreats, the antennae are quickly coiled and retracted into the body. A closeup view emeriha the head of the 3 cm carapace length preserved female. The barred surfperch Amphistichus argenteusfound off the coast of California, consumes a large number of sand crabs.

Natural History of Orange County, California. And a sand crab has no claws on its first pair of legs—another unusual feature for a crab.

From Wikipedia, the free encyclopedia. Here only one is being retracted. The species primarily inhabits beaches with clean, pebble and stone-free sand. As the wave retreats it extends its long, feathery antennae and captures plankton and detritus from the retreating wave.

Emerita analoga

When a wave sweeps in, the animal pops up and rides the wave for a few feet; then it quickly burrows rear-first into the sand emeritw its abdomen movie.

This species is abundant on some California sandy beaches but is not often found as far north as Washington. Photo by Jon Sullivan.

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Note the lack of pleopods on the emeriha. Join us to listen in on their conversation and feel free to interject when the discussion starts to go over your head. For two to four months, the larvae drift as plankton, and currents may carry them long distances.

Both sexes have well-developed uropods but only females have pleopods 3 pairs. She carries them on her abdomen until the eggs hatch—about 30 days later. The sand crab lives under the surface of the sand, moving up emeriga down the beach according to the state of the tide. The Biology of Soft Shores and Estuaries. CS1 Latin-language sources la Articles with ‘species’ microformats Articles containing potentially dated statements from All articles containing potentially dated statements.

Week # 5: Pacific Sand Crab, Emerita analoga – Wildcoast

Commercial bait fisheries keep sand crabs that are in the soft-shelled stage, which occurs after a crab molts its old shell and before its new shell hardens. As the swash zone moves up and down the beach with the tide, so do sand crabs.

The head is to the right in this photo. Sand crabs feed in the swash zone—an area of breaking waves. Its legs and uropods have hairy margins for rapid digging in the sand, for filtering emeeita and transferring it to the mouth. Filter feeders, like sand crabs, ingest the toxin, and it progresses up the food chain. Emerita is a small genus of decapod meeritaknown as mole crabssand crabssand fleassand fiddlers or sea cicada.

Week # 5: Pacific Sand Crab, Emerita analoga

It burrows backwards into the sand and faces the sea. The sand crab is well adapted to life in the sand, which presents an unstable substrate, and its shape is an elongated-dome shape designed for fast burrowing. Retrieved from ” https: Sand crabs can reproduce during their first year of life, depending on the water temperature, and may not live more than two to three years. Why should humans care about me? The species is a motile filter-feeder which inhabits the upper surf swash zone on sandy beaches.

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These are passed on to predators when the predators eat the crabs, and if enough worms are ingested, they have been known to kill the predator. Emerita has a barrel -shaped body. The amount of domoic acid in the crabs’ flesh can indicate the amount of toxin in the water. Cool Facts If dislodged while feeding, sand crabs—in a manner most unusual for crustaceans—can swim or tread water by beating their back legs.

Other birds that eat sand crabs include willetsgodwitssurf scotersblackbellied ploversand curlews. Between Pacific Tides 5th ed. Sand crabs moult periodically, so its exoskeleton may be found washed up on the beach.

The left view shows the normal position of the abdomen and telson. The legs and uropods have hairy margins to assist in digging and for use in collecting food and transferring it to the mouth.

Those trying to capture me are able to identify my location by looking for subtle clues along the beach. The Pacific sand crab is one of the few species specializing in the swash zone of wave-swept sandy beaches. Emerita Female Emerita analoga Scientific classification Kingdom: