Crayfish And Earthworms

Students observe and record some of the structures of a crustacean, the crayfish, and compare it to other organisms. They establish a feeding and maintenance schedule for the organisms. Students investigate crayfish behavior and map where the crayfish spend time within their habitat. Through readings, organism cards, and a video, students learn about adaptations of organisms in different environments. Students engage in an outdoor simulation activity to explore food chains.

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

One containing wild type (WT) and the other having long (lon) C. elegans in order to identify males on each plate. Next, two new agar plates with E. coli as a food source for the nematodes were obtained and labeled with the phenotypes to be used for each cross. For plate 1, a single long hermaphrodite was found and with a heat sterilized worm pick, transferred to the new plate. From the WT parent plate, nine males were moved into plate 1 within close proximity of the hermaphrodite to help ensure fertilization. This cross was made because would show which is the dominant trait based. On plate 2, five long males were taken from the lon parent plate and placed along with a single wild type hermaphrodite from the WT parent plate. This cross was made to see if the trait was sex linked or not. This was followed by each plate being resealed with parafilm and given to the instructor to be put in storage until the following

All organisms have different digestive systems, respiratory systems, and circulatory systems. They all need to digest their food, breathe, and circulate their blood, but how do they do it? You will learn how the Human Body, Crayfish, Earthworm, and Frog do those things, and what the similarities and differences are.

Some of the similarities that are between both is that the digestive system is some what similar to the human digestive system. How that works is all the food goes down in the mouth first and then goes to the Crop, in which is the stomach of the worm. It stores there for a bit until it goes to the Gizzard in which that would break down the nutrients that the worm needs in its body. In which the waste will soon leave out of the body for both of them. They also have pharynx in which is part of the throat and the esophagus in which is the part that carries the food to the stomach.

Basically speaking, an earthworm has two muscles, circular and longitudinal, that allow for locomotion with the muscular system. They run throughout their entire bodies and also help with contraction.

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

Just last month, a deadly worm was found in not one, but four locations in the U.S. state of Florida. This worm, until recently, was documented in only twenty-one countries, most of which were island nations. Although the New Guinea Flatworm may seem as a highly dangerous predator, it is only about two inches in length and mainly targets snails for its nutrition. These worms are not harmful to humans, but they will feast on any soft creature in the soil. In order to eat snails or any critters with a hard shell, the New Guinea Flatworm latches itself onto the shell’s opening and then spits out its own stomach through the opening in its belly. This allows an acidic goo to dissolve the snail’s flesh and the worm can continue on with its meal by swallowing both its stomach and the snail.

species group. The location of this earthworm was in Australia, where they claimed their habitat

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

1.) My hypothesis that the insects would be most repelled by the lemon plant extract was not supported. Our key findings in the experiment do not support my hypothesis because the lemon had a 60% repulsion response and was the second most repulsive behind orange with a 70% repulsion response. Although the Earthworms were repelled by the lemon plant extract, they were more so repelled by the orange plant extract. 2.)

Starfish and crayfish body plans differ greatly. A crayfish has bilateral symmetry where the starfish has radial symmetry. The type of symmetry an organism has is suited to its lifestyle. Since the starfish has radial symmetry, it is not well equipped to move around, but it is equipped to interact with all sides of its environment.. Animals with radial symmetry are usually sedentary or move around slowly by floating. “In contrast to radial symmetry, which is best suited for stationary or limited-motion lifestyles, bilateral symmetry allows for streamlined and directional motion” (Animal Characterization). The crayfish has more specialized body parts than the starfish because it is equipped to move around and hunt down prey unlike the starfish. From the dissection, It can be concluded that the crayfish is more advanced because of its body systems and its ability to move around its environment more effectively.

Sea worms all have some resemblance to the common earthworm. The only difference is that the sea worms have now evolved to many different shapes and sizes depending on where they live among the reefs. The coral reef thrives for the worms eating, building, reproduction, and excretion habits (animals).

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.