Mutualism In Spider Crabs

In this essay i’m going to tell you about the fiddler crab. Here is one fact the fiddler

Lichens are another example of mutualism. Lichens are formed by algae and fungi living together and they both help each other. Algae can photosynthesise and make food, which is shared by the fungus. The fungus in turn shelters the algae from a harsh climate.

The first fundamental idea is Assumption of Symbiosis is an idea, which deals with the relationship in which people have within their social surrounding. The main idea that comes with this idea is that most all of today’s population wants to seek out things, which are in there surrounding area. Almost all of us want to be apart of something which could range

In all symbiotic relationships, one of the species involved in benefited. In Mutualism, both are benefited, in Parasitism one is harmed by the other’s gain, is commensalism one is not affected by the other’s gain. In a Cooperative relationship, both are working together to achieve a common goal. In Predation, one organism is preyed upon by another, who will most likely use the organism for food.

You scratch Giant Crab 1 in the left first leg from behind, fracturing the chitin and bruising the fat!

The coyote and badger is a great example of mutualism. Coyotes normally don’t hunt in packs or in tight knit groups but is often found hunting with the badger. The best example would be hunting in prairie dog fields. The coyote takes the prairie dogs on the ground while scaring other dogs into their holes where the badger is. When the badger hunts underground catching it’s prey it also scares dogs up to the ground where the coyote is. So basically the badger and coyote work together to corner up the prairie dogs and eat until they get their fill.

The Callinectes sapidus also known commonly as the Maryland Blue Crab, is a crustacean found in the Chesapeake Bay. The blue crab is found in aquatic environments, most often in estuaries. It characterized by it’s blue claws. The blue crabs undergo a life cycle of: zoeae, megalop, juvenile, and adulthood. The blue crab’s hard shells serve as a protective barrier for external dangers. The Callinectes sapidus comes from the order of Decapods, whereby it’s carapace has now evolved to be better suited for swimming. Of interest is the blue crab’s mating

Horseshoe crabs are an important part of the wetland ecosystem, however they are going extinct. Due to harvesting, pollution, and other animals consuming their offspring their numbers are dwindling. They play an important part in the ecosystem and need to be protected so they do not become extinct. The Delaware bay has decided to protect them for their future uses in medicine and to keep them as an important role in the ecosystem.

The argument the author puts forth is that horseshoe crabs have evolved over the eras. That they’re not “living fossils”. Horseshoe crabs have “rounded cephalic shields, that were like the extinct trilobites, and an arrangement of legs and gills”, no wonder people think they are living fossils. This is the beginning to how these historic animals have evolved.

The Purple Marsh Crab, or simply known as the Marsh Crab, is a small crab that is native to the Eastern United States. They live in the salt marshes and mud flats of brackish estuaries, and create networks of connected tunnels within the flats.

The horseshoe crab and the trilobite do share a common ancestor. There are many pieces of evidence in the anatomy of both species that support this claim. A first piece of evidence is that both species have an outer exoskeleton but no internal skeleton. This separates both of them from vertebrates, making both of them invertebrates. The second piece of evidence supporting walking legs of both species are also positioned on the underside of the animal, protected under the shell. Both the trilobite and the horseshoe crab have one horseshoe-shaped cephalothorax with a raised ridge in the middle of it and two eyes positioned on either side of the ridge. The mouth of both species is on the underside of the body as well, unlike crustaceans and insects

Horseshoe crabs are considered “living fossils” or evolutionary survivors because the external appearance barely changed in over 150 million years. The horseshoe crab is part of the arthropods, which include organisms such as spiders and scorpions. The horseshoe crab is made up of the prosoma, which is the head, opisthosoma, which represents the central part of the body and the telson, which is the tail. The tail is harmless and is only used to help the crab flip itself over if it’s turned over on the wrong side. Horseshoe crabs have been researched numerous times. Findings include their, ancestry, survival, morphological changes (if any) and phylogenetic research among the different variations of horseshoe crabs.

An invasive species is a species that is not native to an area, and whose introduction often causes harmful environmental impacts. The European Green Crab, also known as Carcinus maenas, is an invasive species from Europe. It was introduced to the U.S. most likely by ballast ship water, El Nino, or by being shipped unnoticed in the kelp packing around lobsters/bait worms. The European Green Crab now inhabits the eastern and western coasts of the US, in addition to its native home and other invaded areas.

The blue crab Callinectes sapidus is a wide-ranging, ecologically and economically important species along the Atlantic and Gulf of Mexico (GMx) coasts of North America. Consequently, its basic biology, life history, population genetics, and demography have been the subjects of numerous studies. For my dissertation research, I propose to focus on two critical areas concerning the ecology and evolution of blue crabs that have broader implications for our understanding of marine organisms with biphasic life cycles. For the first chapter I will investigate the unusual finding of extreme temporal and spatial variation in the genetic composition of settling blue crab larvae along the Texas coast. Since it was reported in 1993, this finding been

The American horseshoe crab (Limulus polyphemus) has persisted largely unaltered for millions of years (Smith et al., 2006), and has ancestors that date back 450 million years ago (Swan, 2005). They belong to the genus Limulaceae, and are an ancient group of aquatic merostome arthropods (Sekiguichi, K., and Shuster J., 2011). Limulus polyphemus inhabits the eastern coast of the United States (Goode and Wahle, n.d., Swan, 2005). It ranges from the Yucatan Peninsula to the Gulf of Mexico (Moore and Perkin, 2007 (Shuster, 1979), about 42 to 19° N (Botton, 2003). Limulus polyphemus are found within estuaries, coastal embayments, and on the inshore continental shelves near the mouths of estuaries, usually in waters that are less than 30 meters