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All The King Crab Anthropology

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King crab is recognized for its aquaculture potential, but several biological and ecological aspects are still unknown from the species, including the ontogeny before the larval stage. It has been assumed that, like the others “spider crabs”, it exhibits sexual dimorphism and three stages of maturity, distinguishable by phenotypic differences: (I) juvenile, (II) intermediate and (III) adult. To address these assumptions, we performed morphometric landmark analysis on the carapace of 325 individuals from three Caribbean islands: Providence, Rosario and San Bernardo. Within each island, sexual differences in carapace size and shape among stages of maturity were tested by applying univariate and multivariate statistical tests, respectively. All …show more content…

This species, formerly a member of Mithrax genus, was recently reassigned into a new genus of the Mithracidae family by Windsor and Felder (2014). The “king crab” is characterized by a bright carmine red or red wine carapace, subtriangular, slightly wider than long , with a small rostrum formed by two truncate short horns and the first two spines of the anterolateral edge bifid (Williams, 1984). Because the carapace width may reach up 17 cm (Rathbun, 1925), D. spinosissimus is considered the largest crab from the Caribbean with enormous economic potential (Hartnoll, 1965; Munro, 1983; Creswell et al., 1986; Guzmán and Tewfik., …show more content…

spinosissimus (Baeza et al (2012). Specifically, the latter species seems exhibit morphological changes from juvenile to pre-puberty, from puberty to adult, and sexual size dimorphism in chelipeds (Munro, 1983; Creswell et al., 1986; Winfree and Weinstein, 1990; Guzmán and Tewfik, 2004) and carapace of adults (Baeza et al. (2012). Moreover, it is known that D. spinosissimus coupling takes place after moulting and does not requires a soft carapace, so it can have continuous spawning (Creswell et al., 1986). Nevertheless, it remains unclear if the development continues or ceases in sexually mature

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The experiment consisted of two sub-experiments that when synthesized together, successfully answered our main question. The first of the two sub-experiments focused on collecting data for the creation of a life table in which Daphnia magna were not in the presence of a predator such as Lepomis macrochirus, known in laymen’s terms as bluegill fish. The second of the two sub-experiments focused on collecting data for the creation of a life table as well, but this time the daphnia were subjected to an environment where bluegill fish were present. The collection of the data for the creation of the first lifetable without predation consisted of fourteen replicates or daphnia starting at age 3 and ending at varying ages depending on the mortality of each replicate group.

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2462 Words | 10 Pages

This net will have florescent orange floats fastened to the net at the top to keep the net held up in the water and to alert boats of the net. At the bottom of the net, it will have weights to keep it held down in the water. The maximum reported size of the long-snout seahorse is 6.9 inches (17.5 cm) in height (top of the coronet to the end of the stretched out tail). H. Reidi reaches maturity at approximately 3.1 inches (8 cm) in size. The squares in this burlap should be small enough to keep the seahorses in but allow small shrimp and plankton in and out to feed the seahorses.

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589 Words | 3 Pages

During the 1990’s it was discovered that a decline in the population of Red Knots occurred, simultaneously with the decline of horseshoe crab eggs. It was hypothesized that this event was significant and was the cause of the waning population of Red Knots. The Red Knots main dietary staple is horseshoe crab eggs and the nutrition provided

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187 Words | 1 Pages

Daphnia magna is a transparent water flea species found in rocky pools along the Atlantic Ocean. The Daphnia’s body is encased in a clear structure called carapace (Elenbaas, 2013). The exoskeleton, carapace, provides protection for the Daphnia magna, “The portion of the hard exoskeleton, or shell, that covers all or part of the body of many crustaceans…” (“Definition, n.d.). The heart can be easily seen under a light microscope due to the transparency of the skin (Handy, 2012).

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70 Words | 1 Pages

Horseshoe crabs, marine arthropods known for their horseshoe like shells have been roaming the Earth long before the dinosaurs. These living fossils only inhabit the Eastern Shore and can be found on Delaware beaches such as the Delaware Bay, but these living relics may be in for extinction. Due to this exact reason Delaware has begun studying and protecting these species. Horseshoe crabs are vital to the Delaware Bay ecosystem,

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433 Words | 2 Pages

The election of 1824 was very different than today’s elections. It set the stage for the 1828 Presidential Election to birth the “Modern American Political Campaign.” There were four candidates for the campaign in 1824. They were all from the same party. This prevented all of them from being able to get enough Electoral votes to become President.

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1239 Words | 5 Pages

Our main argument is now drawn to the issue surrounding the mode and methods of cooking and preparing the lobster. Before we begin, it is important to recognize the anatomy of the creature. It is hard-shelled sea creature, and this might be the reason for the

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499 Words | 2 Pages

The Asian shore crab has recently invaded the temperate east coast of North America, being a native species to temperate and subtropical regions of the western pacific it can thrive in any like environment (2). The first reports of this species in North American waters were in intertidal habitats in Delaware Bay and stretch to areas of the coast of Maine (2). In a study from 2002 to 2005 of Asian shore crabs in Western Long Island Sound Estuary it was seen

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532 Words | 3 Pages

An interesting feature of this lake is that it contains no large mouth predators of the fish. Normally, the spines of the fish keep them protected from these predators, but here in Bear Paw Lake, the spines actually decrease the fitness of the fish because the dragonfly larvae living at the lake bottom prey on the fish by grabbing them by their spines. Due to natural selection, eventually the fish in the lake population lost their spines on the undersides of their bodies.1 The fish that had low fitness due to their spines were killed and unable to produce offspring while those without spines or maybe with reduced spines lived long enough to

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252 Words | 2 Pages

As you may know, blue crabs help support the fisheries in the Chesapeake Bay. However, over-harvesting has taken a toll on the population. Over-harvesting is most affecting the female species of blue crabs. According to the Chesapeake Bay Program, in

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656 Words | 3 Pages

The reason for that is because once you gain a new shell, there are few remnants of your old one. I now know what excellence feels like. Up on that stage receiving my merit for years of hardships - that is excellence. When hermit crabs have outgrown their shell, they shed it and look for a new one. Sometimes they will go bare before they find their new home.

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196 Words | 1 Pages

Meaning of name: The Horseshoe crab gets its name because their arc shaped exoskeleton has been compared to what a horse shoe looks like. Description on animal: Even with crab in the name, they aren’t related to crabs and lobsters so much. They are actually related to scorpions and spiders. The female Horseshoe Crab is about 18-19 inches from tail to head, and the males are about 14-15 inches.

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1307 Words | 6 Pages

Understanding the biology of lobster is imperative to ensuring that the resource is being managed appropriately, and it provides context for the v-notch measure. American lobster (Homarus americanus) live on rocky sea bottom cover, and range across the eastern seaboard from the Maritime Provinces of Canada to the Mid-Atlantic United States. In the United States, Maine’s lobster fishery is by far the most prevalent. Lobster fishing in Maine occurs year round – lobster are often found offshore in the colder months and closer to shore during the warmer summer months. Lobsters are long-lived crustaceans.

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586 Words | 3 Pages

Anthropology Questions: 1. Was this crime indicative of the beliefs, morals, and culture of the two aggressors? 2. Were there any scratch marks found on the victim? Were there any fingernails found at the scene of the crime?

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The debate over Aileen Wuornos’ jurisdiction is one that is still open due to how controversial the case is. What accounts a person as a criminal is a person who is well aware of the actions he/she is committing. A criminal has a clear intentions and is aware of the consequences ahead. Whereas, a victim is one who under astounding circumstances can be excused for their heinous actions. An in depth look into Aileen Wuornos’ life can lead to viewing her as a truly a criminal who is responsible for all of her crimes.

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