Cray Fish Research Paper

Crawfish are delicious crustaceans that closely resemble lobsters. Many people consider crawfish to be as delicious as lobsters, which is why these crustaceans are harvested all over the world. In the U.S., crawfish are closely associated with the haute cuisine and culture of Louisiana. In fact, crawfish are the official crustacean of the state. I normally prefer to harvest or purchase crawfish on the day I intend to cook them. However, many people prefer to purchase and eat them later but do not know how to keep crawfish alive in a sack or container for several days before finally preparing and eating them. Fortunately, I will provide you with some tips on how I keep my crawfish fresh and healthy

It’s a beautiful day at the beach, the sun is shining down on you as you float and drift on top of the waves. As you lay there without a care in the world, you are suddenly interrupted by a massive swarm of jellyfish; also known as a bloom. Not only does this send you into sudden terror, it also causes a much bigger threat to the ecosystem below you. The excessive growth of jellyfish swarm drastically lowers the population of fish eggs in the ecosystem. Because of this, fishermen lose millions of dollars. People in local communities are figuring out ways to solve this mass production.

Over 25 years ago, a new species was discovered that completely shocked the world, a crayfish-like no other, named the marbled crayfish.As their name suggests, they include an alluring brown colored marbled pattern, which is identical from individual to individual. To this day, the marbled crayfish is more diverse than any other crayfish because it is able to clone itself without any involvement of a male, in a matter of hours. This crayfish is new mutant species which has generated immense concern as a potential invasive species. What really shocks the scientists is the fact that they can reproduce at extraordinary rates from 250 to 300 clones in a few months and are already spreading rapidly throughout the globe. This creature was never

The removal method of Ringed Crayfish data collection was over a sample site area of 50m2 at Pearson Creek, a stream, containing a density of 5.18 crayfish/m2. The sample site was collected in 5m in width by 10m in height with wet, rocky, and grassy conditions. The data collection incorporated five different samples of the number of crayfish removed from the stream each time (Figure 1). Sample one caught 53 Ringed Crayfish with 0 crayfish caught prior. Sample two caught 37 Ringed Crayfish with 53 crayfish caught prior. Sample three caught 42 Ringed Crayfish with 90 crayfish caught prior. Sample four caught 26 Ringed Crayfish with 132 crayfish caught prior. Sample five caught 18 Ringed Crayfish with 158 crayfish caught prior. What was caught in the previous sample was added into the total amount of crayfish caught prior. A negative linear relationship is displayed by data collected in Figure

At New Melones Reservoir, despite the continuing snow melt, the water level dropped another foot last week. The water clarity is good and the temperature is slowly coming up, now averaging 76 to 81-degrees. Trout are showing signs of schooling over deep water and feeding on shad minnows. Trollers have been finding trout at 40 to 60 feet with Speedy Shiners, Needlefish, and ExCel lures. Night fishermen have been doing well by anchoring over fairly deep water and lowering their light to about 20 feet. This attracts plankton, which in turn, attracts shad, which will attract larger fish. Live minnows and nightcrawlers are choice baits. The kokanee numbers may be down, but the quality is good with some going 15 to 18 inches. Bladed lures may work well in deeper water as they create vibration which will attract fish. Scented corn on each hook is important. Big trout winner at Glory Hole Sports was, again, Bob James, of Murphys, with a 2-pound rainbow caught at 55 feet in the main lake. Big catfish winner was John Tennant, of Twain Harte, with an 11-pound, 15-ounce fish caught with sardine bait in the main lake. Bass fishing is good for those who specialize in that type of fishing. Hayden Lee, of Angels Camp, recently caught a 10 pound Largemouth Bass on a topwater lure and he had no net in the boat. He and a friend were able to boat the fish for photos before release.

Crayfish (Procambarus clarkii) are crustaceans that are similarly related to crabs, lobsters and shrimps. They live in partly salty water (brackish water), rivers, ponds and are considered omnivores because they feed on small fishes, plants, detritus, mollusk, and other small invertebrates. Crayfish have a hard-calcified exoskeleton which is typically made of structural polysaccharide called chitin. This calcified exoskeleton must shed for the crayfish to grow (Fitzgerald, 2006).

Starfish and crayfish are both invertebrates, but they have many differences. Last week,  our class did a dissection on each and learned more about them. This research paper will explain some differences between the two that were learned during dissections and by doing outside research.

Crayfish are crustaceans that are a part of the phylum arthropoda. Similar to the lobster, an organism within the same phylum, crayfish breathe via feathered gills. It is the use of these gills that allows oxygen uptake and thus the ability to survive in freshwater environments.

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

Signal crayfish (Pacifastacus leniasculus) is an invasive species in UK and European freshwaters which originate from North America and was introduced in Europe in the 1960s. Due its large size body and aggressive nature has threatened the native species, white-clawed crayfish (Austropotamobius pallipes). Aggressive behaviour is bolder in signal crayfish species, which is directed also against conspecifics not only against other species (Pintor, Sih and Bauer 2008). Signal crayfish is widespread across the British Islands; predominantly inhabiting south-west part where for the first time was introduced. The motility of signal crayfish depends of temperature, and is higher during the summer period (Bubb, Thom and Lucas, 2004). Signal crayfish

Identify certain regions of the crayfish body: the head, thorax (combined with the head), and abdomen. Look at Figure 2 to understand where to look.

Imagine living at the bottom of the sea with little food to eat and you are suddenly caught. You realize you are coming up through the sea. You are pulled out from the water and you are having trouble breathing. The fishermen throw you onto the deck of the boat and you suddenly realize you have just lost everything but then after the picture is taken they throw you back into the sea. You swim back to the bottom of the sea and see your mate and babies. The blob fish was allowed to do this because they respond to the environment, reproduce, gets energy, exchanges gases, and

It turns out the door taking on the appearance of an adorable little aquarium sim. The illustrations underscore this, with exquisite movements and neighborly confronted, mindful ocean creatures. It looks extraordinary, sounds well and just about works all by itself for people who are exclusively into virtual situations. In any case, Fishdom has a trap up it's sleeve, and it's a trick that ought to speak to people who may not be fulfilled by barebones aquariums: one can gather game coin to gain more fish and better hardware, however it takes the vanquishing of the games match-3 gameplay to make one's close to home ocean world rock.

The all-men competition was coming up at Crawfish Aquatics. Every team that was in the competition practiced hard everyday in order to have a shot at winning. There was one team, in particular, who had been practicing very hard. As the date of the competition came closer, the team would practice twice a day making sure that they had all the skill that they needed to win. The team’s coach called for a final practice the day before the competition. When their coach, Louis, arrived at the last practice, he saw that none of his swimmers showed up. Louis had to think of a punishment to teach his team a lesson that they can not choose which practices they attend. After a long time of brainstorming of ideas, he finally came up with the perfect plan.

Sensory organs in crayfish resemble some those found in humans. Sensory nerve cells in their antennae, telson, and uropoda will receive the information of the external stimuli from their environment and convert it into electrical and chemical signals. Due to the uneven distribution of ions in the cell membrane in large part due to potassium (K+) and sodium (Na+) there is a difference of voltage in the excitable cells. The uneven distribution is maintained due the ATP in the cell being used to pump the Na+ ions out and K+ ions into the cell. The resting potential will have K+ in the cell membrane causing it to be negative outside the cell. Sensory neurons don’t all react the same to all stimuli such as pain, pressure, stretch, or chemical transmitters. The purpose of these stimuli is to depolarize the cell membrane