Crustacean Research Paper

Brine Shrimp are a micro-crustacean that is found mostly in inland saltwater bodies, however, the salinity levels that they live in vary greatly. The conditions that they require can be made at home as the eggs (cysts) of the shrimp are dry, hard shells that can withstand drought and go without water for up to 50 years. This study presents the results of 3 different salinity levelled environments to the Brine shrimp in order to discover a salinity level that produces the most successful hatching rate. By filling 3 Petri dishes with 20mL’s of purified water, each dish contained varying sodium chloride amounts from 15ppt, 25ppt, and

This article presents the impact of low oxygen waters on Chesapeake Bay Zoo-plankton. Anoxia (oxygen deficiency) reduces the cope-pod abundances in Chesapeake's bottom waters, and disrupts the cope-pods inhabits towards the bottom and their migration to the surface. Also, cope-pods will have limited survival ability in low oxygen conditions in bottom waters. Results show the number of cope-pods surviving for 24 hours were significantly lower in water containing smaller milligrams of oxygen liter. Some will have a greater chance of survival because of their low metabolism that requires smaller oxygen. Low oxygen reduces the filtration rate of zoo-plankton and the filtration rate of the fresh water. Decreased filtration reduces metabolic rate in low-oxygen conditions, generally occur in the mesohaline part in summer. Low oxygen-levels may cut phyto-plankton and Cope pod's production. Lower oxygen concentration prevents hatching and the growth of eggs, which eggs could survive a few days if temperatures are cold and as the eggs sink to the bottom.

Therefore this experiment was to determine that lobsters in various salinities will osmoconform to their environment. In order to test that lobster's osmoconform, we had to extract approximately 1.0 ml hemolymph from their hemocyannin on the ventral first section of the pre-branchial region. The hemolymph was spun for three minutes in a microcentrifuge and the serum was then tested on an osmometer, which determined the osmolarity of the hemolymph. The results substantiated the hypothesis, in that, lobsters internal osmoles fluctuate with the salinity of the external environment. The two lobsters in the low salinity tank had the lowest osmolarity 0.746 osmoles; the two lobsters in the normal salinity had 0.873 osmoles. The last tank with the highest salinity had the lobsters with the highest osmolarity at 1.445 osmoles. Therefore our data suggests that lobster's osmoconform, with respect to the salinity of their environment by readjusting their intracellular solute concentration to prevent swelling or dehydration because the osmolarity of their hemolymph dictates that of the environment.

Imagine that a huge wave crashes down on you. Then it drags you back into the ocean. On your way you pass by an animal that is clinging on for dear life. In order to survive in these harsh conditions, animals need adaptations. An ecosystem is a biological community of interacting organisms and their physical environment. The California Spiny Lobster lives in the neritic e zone which is in between 200 meters and 0 meters. It is located on the continental shelf. They like living in coral reefs and the ocean ground. In order to survive in the neritic zone with predators, sea floor hiders, and other environmental threats, animals need adaptations.

In Maine, people are wondering why there are so many lobster appearances when fishing. The reason for this is because in Vinalhaven Island, Lobster fishing trucks has been piling up relentlessly on the daily commerce roads, and new fishing boats have been occupying in the harbor. Fishing companies has been fishing for more lobsters, causing catches to rise up rather quickly. Everyone however are expecting for the new development to drop once again, before this could happen. The Maine Lobstermen are currently making new development as much as they can before the season of fishing for lobsters is over. The owner of the company, Walter Day use the form of catch and release towards different lobsters he believe that could benefit the ecosystem,

It was interesting to read that the hypothesis provided by the scientists turned out to be opposite of what happened to Valley Creek. The macroinvertebrates were already living in a low quality creek full of pollution, so I would have also expected their population to decrease after introducing a predator to their environment. The crayfish reminded me of the keystone species sea stars, that I learned about through a lecture on communities and ecosystems. The study conducted on crayfish was similar to a study conducted on sea stars, except they were removed from coastlines instead of being added to see the effect they had. The sea stars were believed to have a negative effect on the coastlines since they preyed on mussels, but it turned out

The objective of this project was to cook, and serve lobster utilizing a method, which was given, to prepare the lobster as well as a recipe for the lobster. In addition to this we also needed to create rice pilaf, asparagus, and a vinaigrette salad using the various ingredients provided to us. This project is supposed to give us our first glimpse into implementing our newly found skills from Culinary class into our cooking lifestyle at home.

The most terrifying creature is a clown mixed with a lobster. Clowns are scary enough but a clown with six arms like a lobster is really scary. If a clown had six arms with claws it would chase you in a haunted house with six air horns, and that’s scary. This clown would be like the clown from “IT”. What if you walk into a carnival and saw a six armed lobster clown I would run away.

The PaV1 infection is a pathogenic virus that is usually lethal within the course of weeks or months for juvenile spiny lobsters and the spiny lobster species is commonly affected by this disease. Most lobster traps are baited with live, sublegal-sized lobsters because these attract legal sized lobsters due to their social natures but it is not well known how lobsters react to traps that have PaV1 infected lobsters in them or how other lobsters confined in the traps with the infected lobsters handle this virus. The study found that 11% of lobsters caught in traps tested positive for the virus even though they showed no visible signs of disease. It was also found that traps containing infected lobsters caught a significantly lower amount of lobsters compared to those traps that had healthy lobsters in them. Once healthy lobsters were caught in traps with PaV1 positive lobsters, the healthy ones soon became infected more so than healthy lobsters confined with other healthy lobsters. These results show that a pathogen can have a significant impact on the practice of wood box like traps that can have negative consequences to the lobster

It is also prey to other animals, such as horse conch, grouper, sea turtles, cobia,

Some organisms are resistant to ageing and can be classified as biologically immortal. Cells that are not subject to the Hayflick limit (normal number of times cells divide until they stop) are considered biologically immortal. Hydra is a biologically immortal organism because it does not undergo cellular senescence as they regenerate their stem cells and have few different cell types. The American lobster Homarus americanus has large quantities of telomerase in its adult stage unlike most vertebrates which have an absence of this in their adult life; therefore the American lobster has an extended lifespan.

This disadvantage of living underwater is the oxygen level in water is around 1% which is very little, this means fish must have a very efficient gas exchange system and key

Oxygen Depleted Waters-Over the years there has been an increase in hypoxia and anoxia in different regions of the oceans. In other words the oceans are lacking or having no oxygen to support marine life. The oxygen depleted waters typically occur during early to late autumn. The rise in hypoxia and anoxia amongst the oceans have led to increased mortality in marine life. In the article Suffocating the Ocean by Moises Velasquez-Manoff it emphasized the result of oxygen loss, “In 2002 they began pulling in traps full of corpses”. This shows how the lack of oxygen is causing the death rate to increase amongst marine animals. The waters are inhabitable due to the lack of oxygen making the atmosphere unable to support life. I feel that after

After 3 days in the diluted seawater the crab’s haemolymph Sodium levels were significantly lower (p<0.001) than the crabs stored in full strength seawater as seen in figure 3. There was no significant difference between the mean haemolymph Sodium values of the three dilutions at 75%, 50% and 25%.

Two crab species, Plagusia and Cyclograpsus, were collected from a local estuary in the littoral and deep water zone for osmoregulation studies. To examine differences in osmoregulatory mechanisms among the species, haemolymph of the specimens was extracted once they were acclimated to varying concentrations of seawater. Using the comparative melting-point, capillary tubes were filled with small samples of seawater and blood then frozen and melted in a -15˚C ethanol bath. The melting time of each was observed thereafter. Subject’s time range fell over 17 minutes of which the majority of the most salinated samples melted