Knobbed whelk

Knobbed whelk

Taxobox
name = Knobbed whelk
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
ordo = Sorbeoconcha
familia = Melongenidae
genus = "Busycon"
species = "B. carica"
binomial = "Busycon carica"
binomial_authority = (Gmelin, 1791)

The knobbed whelk, "Busycon carica", is a species of very large predatory sea snail, or in the USA, a whelk, a marine gastropod mollusk in the family Melongenidae, the busycon whelks and crown conches.

The knobbed whelk is the second largest species of busycon whelk, ranging in size up to 12 in (305 mm).

Distribution

Knobbed whelks are native to the North Atlantic coast of North America from Cape Cod, Massachusetts to northern Florida. This species is common along the Georgia coast. It is the state shell of New Jersey and Georgia.

hell description

The shell of the knobbed whelk is dextral, meaning that it is right-handed. If you hold the shell in front of you, with the spiral end up and the opening facing you, the opening will be on the right side. The aperture of the shell (the inside of the opening) is orange.

External anatomy of the soft parts

The soft body comprises the head, the visceral mass, and the foot (which is small). The knobbed whelk has two pairs of tentacles on the head. The larger pair each have a light-sensitive eyespot. The smaller pair of tentacles is used for the sense of smell and the sense of touch.

Life habits

The knobbed whelk lives subtidally and is migratory, alternating between deep or shallow water, depending on the time of year.

During the weather extremes of the summer and winter months, these sea snails live in deep water, at depths of up to 48 m. In the milder weather of the spring and fall they live in shallow water, on near-shore or intertidal mud flats and sand flats.

On the shallow-water mud flats whelk prey on oysters, clams, and other marine bivalves. They wedge a bivalve open by inserting the edge of their shell, and insert their long proboscis to eat the flesh of their victim. They rasp at the flesh using their radula, a rough tongue-like organ that has thousands of tiny denticles (tooth-like protrusions).

Reproduction

Mating and egg laying occur during the spring and fall migration. Internally fertilized eggs are surrounded by a transparent mass of albumen, a gel-like material, and are laid in protective flat, rounded egg capsules joined to form a paper-like chain of egg cases, commonly called a "Mermaid's Necklace". On average each capsule contains 0-99 eggs, with most strings having 40-160 capsules. After laying their egg cases, female knobbed whelk will bury one end of the egg case into the substrate, thus providing an anchor for the developing fertilized eggs and preventing the string of egg cases from washing ashore where it would dehydrate. Fertilized eggs emerge as juvenile knobbed whelks approximately 4 mm in length.

Human use

As with conchs, the knobbed whelk is used by humans as food in such dishes as salads (raw), burgers, fritters, and chowders.

As is also true of conch shells, the shell of the knobbed whelk can be made into a natural bugle by cutting off the tip of the spire in order to form a mouthpiece.

References

External links

* [http://www.arches.uga.edu/~amylyne/GSC/whelka&r.html Anatomy of the knobbed whelk]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Whelk — Taxobox name = PAGENAME image width = 250px image caption = A lightning whelk shell found on a Gulf of Mexico beach in Louisiana. regnum = Animalia phylum = Mollusca classis = Gastropoda subclassis = Orthogastropoda superordo = Caenogastropoda… …   Wikipedia

  • Lightning whelk — Taxobox name = Lightning whelk regnum = Animalia phylum = Mollusca classis = Gastropoda ordo = Sorbeoconcha familia = Melongenidae genus = Busycon species = B. perversum binomial = Busycon perversum binomial authority = (Linné, 1758.) synonyms =… …   Wikipedia

  • Channeled whelk — A shell of a channeled whelk Scientific classification Kingdom: Animalia …   Wikipedia

  • Busycon — Taxobox name = Busycon image caption = Lightning whelk, Busycon contrarium regnum = Animalia phylum = Mollusca classis = Gastropoda ordo = Sorbeoconcha familia = Melongenidae subfamilia = Busyconinae genus = Busycon genus authority = Röding, 1798 …   Wikipedia

  • New Jersey — This article is about the U.S. state of New Jersey. For other uses, see New Jersey (disambiguation). NJ redirects here. For other uses, see Nj (disambiguation) …   Wikipedia

  • Georgia (U.S. state) — State of Georgia redirects here. For TV series, see State of Georgia (TV series). For the sovereign state, see Georgia (country). State of Georgia …   Wikipedia

  • Long Island Sound — is an estuary of the Atlantic Ocean and various rivers in the United States that lies between the coast of Connecticut to the north and Long Island, New York to the south. The mouth of the Connecticut River at Old Saybrook, Connecticut empties… …   Wikipedia

  • Mussel — Not to be confused with muscle. Mussel Blue mussels Mytilus edulis in the intertidal zone in Cornwall, England Scientific classification Kingdom …   Wikipedia

  • Buccinum undatum — Temporal range: 28.5Mya Present A live individual of Buccinum undata being held up above the substrate Scientific classification Kingdom …   Wikipedia

  • Abalone — For board game, see Abalone (board game). Abelone redirects here. For the wine grape that is also known as Abelone, see Chasselas. Abalone Living abalone in tank showing epipodium and tentacles, anterior end to the right …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”