Crayfish Essays

Good day. Who has ever gone camping before? I am pretty sure most of you did. If you haven't, well then you should probably try it out. I can guarantee you that if you are a person like me then you will love it. Also, I can suggest a very awesome place to visit when going camping. Here are three reasons for you to go camping at Hammonasset State Park. The first reason is because of family and friends. When you are camping for a week or more you get to spend all of your time with your favorite people

A fun thing we did a bit later in the semester is we went to on a field trip that took us to one of Santa Monica 's mountains to get rid of some of the invasive crayfish. Of course we had to do observations on these crayfish and it was pretty fun. I was a bit nervous to grab the crayfish at first but with some help from my friend Jonathan I finally got the courage to do it. But when I had it in my hand it moved and got me nervous so I might have dropped it but it was fine

the Mazama Newt that resides there have been threatened by the expanding crayfish population. In 1915, humans wanted to provide food for the non-native fish in the lake, so they introduced crayfish. In addition to threatening the newt, a drastic change in population threatens the magnificent clear waters of Crater Lake. Officials have attempted to place large, metal underwater barriers to try and slow the spread of the crayfish. The 18-inch tall metal barriers would be placed in certain spots around

Unlike the human digestion system, crayfish have a rather simple system. Starting with the mouth, food is ingested and passed into the cardiac stomach via the esophagus. In this first stomach food is stored until it is passed into the pyloric stomach; filled with small “teeth” like structures. Once ground the food is handed out to the intestine, where nutrient is absorbed into the blood vessels and taken around the body. After the intestine, the excess waste is removed through the anus. The digestion

Crayfish agonistic interactions are highly ritualized and can be described by performing various agonistic and antagonistic behaviors. For instances, Crayfish are known for their ritualized fights where they are scandalized but not harmful. Each behavior in the fight has its name. Some of the agonistic behaviors are: tail flip,

The bullfrog and the crayfish are similar and different in many different ways. To start off the crayfish is in the phylum arthropoda, they are invertebrates, and they can be classified as a cheliped which is a shellfish with one large claw and one tiny claw. Bullfrogs are in the phylum chordata and they are vertebrates. Both animals can be found in streams and ponds but bullfrogs can also be found in marshes but crayfish cannot. Bullfrogs reproduce externally which is when the egg is fertilized

this they are harder for the fish to see and they can crawl under things and hide. If fishing with live crayfish, try pinching one claw off. This makes them appear more vulnerable and helps them stand out more. To do this, just grasp one claw very firmly with a pair of pliers. The crayfish will eject the claw on its own and seal off the hole. If you try to pull it out it can kill the crayfish. Try to use the smallest hook that you can get away with for the fish you

Materials and Methods: To gather the needed data on the crayfish, samples were collected at Pearson’s Creek, a little outside Springfield. The spring was right off the road and located directly next to a little over pass. Sampling occurred early morning 0830-0930 on a cloudy day. The weather was a typical mild late summer morning with a rain shower that had passed through the evening before. Two sampling areas that were 10-meters long and the width of the stream were marked off using flags

that the crayfish would show metabolic compensation when they are acclimated at different temperature. Our prediction for this experiment was that there would be no difference between oxygen consumption between cold acclimated crayfish and warm acclimated crayfish. Based on our t-test result, the p value was greater than 0.05(p=0.25). Therefore, it supported the prediction that there was no significant difference of the rate of oxygen consumption between warm and cold acclimated crayfish. The same

Crayfish Response In this experiment the researchers were investigating the limited range of the crayfish species Orconectes saxatilis in the upper part of the Kiamichi River. The dispersal of the crayfish species O. saxatilis and two sympatric crayfish species throughout the upper part of the Kiamichi River were examined. The type of habitat that the crayfish favor for use was also examined along with their historical characteristics. Crayfish species with small habitats are in major need of conservation

the lake and wetland freshwater habitat have. 2. The adaptive features of animals: i. Adaptation to live in the habitat lack of oxygen A. Crayfish: Crayfish lives in fresh water stream, which is an aquatic environment. The oxygen level in fresh water upper stream is higher than the lower stream, but the oxygen concentration is still low. The gills of crayfish are much bigger than the size at first glance. They occupied under the cephalothorax carapace in branched-shape and provided a large surface

Based in our experiment, we observed that an increase in the extracellular concentration of K+ increases the membrane potential of the crayfish muscle fibers thereby depolarizing these fibers. This process occurs because the ratio of K+ extracellular to intracellular was manipulated by adding KCl to the solution surrounding the muscle fibers. By increase the extracellular concentration, the K+ ions rushed inside the cell instead of their usual rushing outside. The movement of K+ ions inside the cell

One container held only crayfish, another snails, and the last one had everything else. Crayfish and snails are in separate containers from the rest because the smaller macroinvertebrates, like Mayfly larvae and Caddisfly larvae, would hide on the crayfish and snails. After about two hours of collecting, I began to identify and count all of the macroinvertebrates I collected using a macroinvertebrate

1.1.2.2.2 The performed toxicity test principle: The preformed test in this experiment is a modified method of the limit test OECD TG 203, and is more adapted for marbled crayfishes. The principle of the test is to show that the LC50 is greater than 100 mg /l. In this test, the marbled crayfishes were exposed to the different test substances dissolved in water and observed for 120 hours. Ever 24 h the mortality, the growth, color and the movement of the crayfishes were recorded. When 1 crayfishes

Barred Owls (Strix varia) are one of our more common owls. They are very large, up to 20 inches tall, with a wingspan of almost four feet. They are often grayish-brown with crossbars on its chest and neck. Barred Owls don't have ear-tufts like some other owls. They have dark eyes, and a small, hooked bill. Barred Owls have strong, sharp yellow talons on their feet. They nest in a variety of natural and anthropogenic structures, but are considered to be primarily cavity nesters. They use tree cavities

membrane potential. We predicted that even though there are many ions in and around a cell, reversal potassium of Potassium will give a good estimate of the membrane potential. In order to test our hypothesis, we measured the membrane potential across crayfish muscle fibers that were submerged in different saline solutions containing varied potassium concentrations. We also calculated the reversal potential of Potassium for those concentrations using Nernst equation. After running a t-test between the

1. Describe and contrast two hypotheses proposed to explain the high diversity of teleost fish in coral reef habitats. The teleost fish evolved during the Jurassic period more than 150 million years ago which has led to the high diversity of this group. One hypotheses proposed about the high diversity of teleost fish is that there has been extensive gene duplications in the class Actinopterygii. Gene duplication is proven to show that with the more gene duplication events the more diversity that

Creek ecology conclusion The question that was investigated was, “what was the quality of the water in the U-high creek based on the macroinvertebrates found in the creek?” The purpose of this lab was to determine whether the water quality was good or bad, based on the type and number of organisms found living in the creek. One way data was collected was by observing the creek to make an original hypothesis to be proved right or wrong later. Another way was when soil, water, and algae samples were

The Crow’s Descent I was on my way home, the gritty, dry dirt beneath my broken and battered knock-off ash grey Converse cracked and crumbled. It was fall, a cold, moistureless air perforated the warmth of my body and the area around me like little cold needles as my breath created small clouds of steam. Crisp, dry autumn leaves swirled around my feet as the breeze picked up on the dusty road I walked. Earless cornfields were at my sides. Grey and barren was the frosted soil where many ears of corn

have been threatened, on the other hand sowbugs do not show this behavior. Pillbugs belong to the members of Phylum Arthropoda and to the class of Crustacea. They share the class of Crustacea with many other unique animals such as the crayfish, lobster, shrimps, crayfish, and barnacles. Pillbugs have a hard segmented exoskeleton, 2 antennas, 2 compound eyes, and seven pairs of