Florida stone crab | |
---|---|
Male | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Malacostraca |
Order: | Decapoda |
Suborder: | Pleocyemata |
Infraorder: | Brachyura |
Family: | Menippidae |
Genus: | Menippe |
Species: | M. mercenaria |
Binomial name | |
Menippe mercenaria (Say, 1818) | |
The Florida stone crab (Menippe mercenaria) is a crab found in the western North Atlantic, from Connecticut to Colombia, including Texas, the Gulf of Mexico, Belize, Mexico, Jamaica, Cuba, The Bahamas, and the East Coast of the United States. The crab can also be found in and around the salt marshes of South Carolina and Georgia. It is widely caught for food. The closely related species Menippe adina (gulf stone crab) is sometimes considered a subspecies – they can interbreed, forming hybrids – and they are treated as one species for commercial fishing, with their ranges partly overlapping. The two species are believed to have diverged approximately 3 million years ago. [1]
The stone crab's carapace is 5 to 6+1⁄2 in (125 to 165 mm) wide. [2] They are brownish red with gray spots and a tan underside, and have large and unequally sized chelae (claws) with black tips. [3] In addition to the usual sexual dimorphism exhibited by crabs, the female Florida stone crabs have a larger carapace than males of a similar age, and males generally have larger chelae than females. [3]
Florida stone crabs prefer to feed on oysters and other small mollusks, polychaete worms, and other crustaceans. They will also occasionally eat seagrass and carrion. Predators that feed on stone crabs include horse conch, grouper, sea turtles, cobia, and octopuses. [4]
Stone crabs can be found in 1⁄2–3 ft (15–90 cm) deep holes near dock pilings in water 1–5 ft (30–150 cm) deep. Oftentimes the hole will have shells around the opening; the crab uses the shell as a digging tool for the hole construction.[ citation needed ]
Females reach sexual maturity at about two years of age. [3] Their long spawning season lasts all spring and summer, during which time females produce up to a million eggs. [3] The larvae go through six stages in about four weeks before emerging as juvenile crabs. Their lifespan is seven to eight years. [3] The male Florida stone crab must wait for the female to molt her exoskeleton before they can mate. [3] After mating, the male will stay to help protect the female for several hours to several days. The female will spawn four to six times each season.
The Florida stone crab loses its limbs easily to escape from predators or tight spaces, but their limbs will grow back. When a claw is broken such that the diaphragm at the body/claw joint is left intact, the wound will quickly heal itself and very little blood is lost. If, however, the claw is broken in the wrong place, more blood is lost and the crab's chances of survival are much lower. Each time the crab molts, the new claw grows larger.
The crab only molts at night or in night-like conditions due to the crab being extremely vulnerable to predators without the protection of its shell. If the crab is becoming too large for its shell and the sun is up, the crab releases a hormone from a gland located on one of its eye stalks called the x-organ. This hormone prevents the crab from molting from its shell until it finds a safe place to molt or it has become dark enough outside to molt in safety.
The Florida stone crab is usually fished near jetties, oyster reefs or other rocky areas, just as for blue crabs. The bodies of these crabs are relatively small and so are rarely eaten, but the claws (chelae), which are large and strong enough to break an oyster's shell, are considered a delicacy. Harvesting is accomplished by removing one or both claws from the live animal and returning it to the ocean where it can regrow the lost limb(s). To be kept, claws must be 2+7⁄8 in (75 mm) long, measured from the tips of the immovable finger to the first joint.
In 1978, and in the Everglades National Park Research Center, wild caught crabs were kept in an aquarium for the specifics of testing mortality rates of declawed crabs. Mortality rates of 47 percent for doubly declawed and 28 percent for single declawed crabs were evident. [5] In the 2011 season the mortality rates had increased to 62.9 percent and 40.8 percent respectively. [6] In retrospect, 20 percent of landed claws are regrown. [7]
In the United States, Florida stone crabs are legal for harvest from October 15 until May 15. [8] The catch varies from year to year, ranging between 2.0 and 3.5 million in the period 1982–2009, overwhelmingly from the Gulf coast (as opposed to Atlantic coast). [7] This is believed to be the maximum amount possible, given current environmental conditions, regulations, and practices. The number of traps tripled between 1989–1990 and 2009–2010 without haul increasing (hence having a very low catch-per-trap level). The Seafood Watch program, managed by the Monterey Bay Aquarium, identifies "high concern" on fishing mortality, "moderate concern" on stock abundance, and the fishery management strategy to be "ineffective." [9]
Claws are sold by size, generally in four sizes: medium, large, jumbo, and colossal.
The top buyer of stone crab claws is Joe's Stone Crab in Miami, and it plays a significant role in the industry, influencing the wholesale price and financing many crabbers. [10]
The Monterey Bay Aquarium's Seafood Watch program gives the Florida stone crab its lowest rating of "Avoid" and suggests "find an alternative" food. [11]
Callinectes sapidus, the blue crab, Atlantic blue crab, or, regionally, the Maryland blue crab, is a species of crab native to the waters of the western Atlantic Ocean and the Gulf of Mexico, and introduced internationally.
The Dungeness crab makes up one of the most important seafood industries along the west coast of North America. Its typical range extends from Alaska's Aleutian Islands to Point Conception, near Santa Barbara, California. Dungeness typically grow 6–7 in (150–180 mm) at their widest point and inhabit eelgrass beds and sandy bottoms. Its common name comes from the Dungeness Spit in the Strait of Juan de Fuca, Washington state, United States, which shelters a shallow bay inhabited by the crabs.
Autotomy or 'self-amputation', is the behaviour whereby an animal sheds or discards an appendage, usually as a self-defense mechanism to elude a predator's grasp or to distract the predator and thereby allow escape. Some animals are able to regenerate the lost body part later. Autotomy is thought to have evolved independently at least nine times. The term was coined in 1883 by Leon Fredericq.
The bat ray is an eagle ray found in muddy or sandy sloughs, estuaries and bays, kelp beds and rocky-bottomed shoreline in the eastern Pacific Ocean, between the Oregon coast and the Gulf of California. It is also found in the area around the Galápagos Islands. The largest specimens can grow to a wingspan of 1.8 m and a mass of 91 kg (201 lb). They more typically range from 9.07–13.61 kg (20.0–30.0 lb). The size of the bat ray is dependent on many factors, such as habitat alterations, different oceanographic and environmental conditions. Some bat rays are solitary while others form schools numbering in the thousands.
Seafood boil in the United States is the generic term for any number of types of social events in which shellfish, whether saltwater or freshwater, is the central element. Regional variations dictate the kinds of seafood, the accompaniments and side dishes, and the preparation techniques. In some cases, a boil may be sponsored by a community organization as a fund-raiser or a mixer. In this way, seafood boils are like a fish fry, barbecue, or church potluck supper. Boils are also held by individuals for their friends and family for a weekend get-together and on the holidays of Memorial Day and Independence Day. While boils and bakes are traditionally associated with coastal regions of the United States, there are exceptions.
The Jonah crab is a marine brachyuran crab that inhabits waters along the east coast of North America from Newfoundland to Florida. Jonah crabs possess a rounded, rough-edged carapace with small light spots, and robust claws with dark brown-black tips. The maximum reported carapace width for males is 8.7 in (222 mm), while females rarely exceed 5.9 in (150 mm). It is the closest relative to the European brown crab in the Western Atlantic.
Paguristes cadenati, the red reef hermit crab or scarlet hermit crab, is a small species of hermit crab with a bright red body and yellow eyestalks that lives in the Caribbean Sea. The specific name honours the French ichthyologist Jean Cadenat (1908-1992), who collected the type specimen and sent it to the French carcinologist Jacques Forest, who described it as a new species.
A molluscivore is a carnivorous animal that specialises in feeding on molluscs such as gastropods, bivalves, brachiopods and cephalopods. Known molluscivores include numerous predatory molluscs,, arthropods such as crabs and firefly larvae, and, vertebrates such as fish, birds and mammals. Molluscivory is performed in a variety ways with some animals highly adapted to this method of feeding behaviour. A similar behaviour, durophagy, describes the feeding of animals that consume hard-shelled or exoskeleton bearing organisms, such as corals, shelled molluscs, or crabs.
Crab meat or crab marrow is the meat found within a crab, or more specifically in the leg of a crab. It is used in many cuisines around the world for its soft, delicate and sweet flavor. Crab meat is low in fat and provides approximately 340 kilojoules (82 kcal) of food energy per 85-gram (3 oz) serving. Brown crab, blue crabs, blue swimming crabs, and red swimming crabs are among the most commercially available species of crabmeat globally.
Menippe adina is a species of crab, sometimes called the Gulf stone crab or Western Gulf stone crab. It is very closely related to the Florida stone crab, Menippe mercenaria, of which it is sometimes considered to be a subspecies.
M. mercenaria may refer to:
Pugettia gracilis, commonly known as the graceful kelp crab, is a species of small crab in the family Epialtidae. It lives among forests of kelp on the Pacific coast of North America.
Dyspanopeus sayi is a species of mud crab that is native to the Atlantic coast of North America. It has also become established outside its native range, living in Swansea Docks since 1960, the Mediterranean Sea since the 1970s, the North Sea since 2007 and the Black Sea since 2010. It can reach a carapace width of 20 mm (0.8 in), and has black tips to its unequal claws. It feeds on bivalves and barnacles, and is in turn eaten by predators including the Atlantic blue crab, Callinectes sapidus. Eggs are produced from spring to autumn, the offspring reach sexual maturity the following summer, and individuals can live for up to two years. The closest relative of D. sayi is D. texanus, which lives in the Gulf of Mexico; the two species differ in subtle features of the genitalia and the last pair of walking legs.
The thinstripe hermit crab, Clibanarius vittatus, is a species of hermit crab in the family Diogenidae. It is found in the Caribbean Sea, the Gulf of Mexico and the western Atlantic Ocean.
Loxorhynchus grandis, commonly known as the sheep crab or spider crab, is a species of crab in the family Epialtidae. It is the largest crab found on the California coast. The species was first described to science by William Stimpson in 1857. The type specimen was collected on the coast of California, near San Francisco. Fossils from the late Miocene epoch indicate that this species is at least 11.63 to 5.333 million years old.
Declawing of crabs is the process whereby one or both claws of a crab are manually detached before the return of the live crab to the water, as practiced in the fishing industry worldwide. Crabs commonly have the ability to regenerate lost limbs after a period of time, and thus declawing is viewed as a potentially more sustainable method of fishing. Due to the time it takes for a crab to regrow lost limbs, however, whether or not the practice represents truly sustainable fishing is still a point of scientific inquiry, and the ethics of declawing are also subject to debates over pain in crustaceans.
Red Devil Vampire Crabs are decapod crustaceans part of Brachyura.
Grapsus albolineatus is a species of decapod crustacean in the family Grapsidae, native to the Indo-Pacific.