Cray Fish Lab Report

The bottlenose dolphin has made adaptions for its need for energy, need to reproduce, predation, and abiotic environmental factors. There are three adaptations for abiotic environmental factors. The first one is that the bottlenose dolphin will rapidly emerge from the water to dive back in as a way to save energy so they can swim faster. They also just do this for pure fun. It is common for dolphins to have a limited amount of motion but because the bottlenose dolphin only has two out of seven neck vertebrae fused, it provides them more flexibility at the neck. They are also covered in dense blubber. This blubber helps them stay warm in cold sea levels. There are two adaptations that these dolphins have made to help their need for energy. Dense

Natural selection is the process by which evolution occurs where organisms that are better suited to the environment (‘fittest’) survive and pass on favorable traits to the offspring. Organisms must adapt to the environment in order to survive. The stickleback fish adapted to the environment by keeping/removing the pelvic structures. For example, in Frog Lake, the all of the sticklebacks had complete pelvic structures because the lake was connected to a system of streams that allowed predators into the lake. The sticklebacks in Bear Paw Lake had reduced or absent pelvic structures because little/no predators are present in the lake. The pelvic structures on the fish are similar to the legs of four-legged vertebrates. With this said, the pelvic structures are a very important to the survival/defense of a stickleback.

Elodea Canadensis is an aquatic weed that, like any other plant, uptakes carbon dioxide during photosynthesis and produces it through aerobic respiration. The purpose of this experiment was to measure the amount of carbon dioxide production in Elodea Canadensis plant with varying light source distances in order to understand whether more photosynthesis than aerobic respiration in the plant has occurred. This was done through a two-day experiment where the Elodea plant was first placed under a light source 30 cm away from the plant in the beaker with saturated carbon dioxide and then, on the second day, placed 20 cm under the light source. The amount of carbon dioxide was measured with phenolphthalein and sodium hydroxide (NaOH) and compared

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.

For two days, on the 14th and 15th of April, a field excursion to Hastings Point, New South Wales was conducted. At Hastings Point, topography, abiotic factors and organism distribution were measured and recorded, with the aim of drawing links between the abiotic factors of two ecosystems (rocky shore and sand dunes), the organisms which live in them, and the adaptations they have developed to cope with these conditions. Within these two ecosystems, multiple zones were identified and recorded, and this report also aims to identify the factors and organisms associated with each zone. Lastly, using data and observations from the past, predictions for the future of the rock pool ecosystem were made.

they will sink as the CO2 was what was keeping them afloat. However, if photosynthesis occurs, then the leaves will once again float until photosynthesis is no longer possible. This is because when oxygen if created as a byproduct of photosynthesis, it will enter the

Lizards. What comes to mind? Typically they live on land, in the desert scurrying across the sand. Lots of lizards are fast on land, but this one is fast on water. Not just being able to swim underwater, but being able to sprint directly on the water’s surface. What does this lizard eat that fuels its fast dash across the water? What features has the basilisk have that allow them to not sink into the water? How does the basilisk defeat gravity? Would it be possible for humans to walk on water? With the combination of specialized features and blazing speed with the right environment, the basilisk earns the nickname of the Jesus Christ lizard.

Adaptations allow deep-sea creatures to survive in extreme environments. There are many different adaptations that allow an animal to survive. The three common adaptations consist of habitat, appearance, and diet. The Giant Squid, Zombie Worm, and the Yeti Crab utilized these adaptations to survive, and without them it would be difficult to nearly impossible to keep their species alive and flourishing. Each one of theses species is suited for its environment and survival tasks through its adaptations.

This behavior was observed in all the three experiments and through the period of observation, isopods seemed to move to different sponges before they settled down behind one of them. The χ2 value was 0.03842932, df was 3 and hence the P value was less than 0.001 which proves that this result is not a result of random probability and is in fact significant and reliable.

Moore, P.A. (2007). Agonistic behavior in freshwater crayfish: the influence of intrinsic and extrinsic factors on aggressive encounters and dominance. In Evolutionary ecology of social and sexual systems – crustaceans as model organisms: 90–114. Duffy, J.E. & Thiel, M. (Eds). New York: Oxford University Press.

A hydrilla grows a long steam that has many leaves on it as well as tiny white flowers on them which float above the water. They are an aquatic plant which means they live in water such as clean water, including lakes, ponds, rivers, streams, and marshes. Seen mostly in the Southeast of Florida and in their habitat they form dense mats of vegetation, can grow with little light, and more efficent in taking nutrients than other species. Florida faces many problems within their water bodies and waterways. The aquatic plants pollute 96% of the public lakes and rivers. Hydrilla greatly impact natural cycles as well as recreational means. A hydrilla is a perennial, which means when the weather changes to cold the leaves and stems die, but the roots

It will be referred to as Daphnia for this section. Lemna minor is duckweed, a plant, and it will be referred to as such. We collected three small jars with clear lids for each part of the experiment. They all were filled with 130 milliliters of filtered Lake Herrick water, measured with a graduated cylinder. Each jar also included five Daphnia, which were suctioned out of their previous environment and carefully dropped in to the jars. The experimental jar was comprised of the Daphnia, five milliliters of fertilizer, 1.764 grams of duckweed, and filtered lake water. We measured the duckweed by setting the weight of the scale to include the container, and then removing as much of the excess water from the plant as possible and depositing it on the scale. The control jar included the Daphnia, 1.727 grams of duckweed, and filtered lake water. An additional jar was added to remove any confounding variables, such as the possibility of the fertilizer alone being the direct cause of the possible diminishment of the Daphnia population. This jar was comprised of Daphnia, filtered lake water, and five milliliters of fertilizer. We measured the oxygen content with a dissolved oxygen probe as well as the weight of the duckweed on a weekly basis to check for oxygen compared to plant growth. In addition, we observed the state of our Daphnia and counted each of them, checking for life as

Daphnia magna is a transparent water flea species found in rocky pools along the Atlantic Ocean. The Daphnia’s body is encased in a clear structure called carapace (Elenbaas, 2013). The exoskeleton, carapace, provides protection for the Daphnia magna, “The portion of the hard exoskeleton, or shell, that covers all or part of the body of many crustaceans…” (“Definition, n.d.). The heart can be easily seen under a light microscope due to the transparency of the skin (Handy, 2012). A variety of factors can change the heart rate of Daphnia. According to Richard Handy (2012), “The heart rate (which can be up to 300 beats per minute) can be monitored and counted in different conditions – for example changing water temperature, or changing the type

26.21 Pelvic girdle of Polypterus (A) and Lampanyctus (B) in ventral view Sarcopterygians – *The lobe-finned fishes were the first vertebrates to tend towards to venture on the land. *So, in them, the development of pelvic girdle becomes very important to support body weight in the transition from water to land. *In chonate fishes pelvic girdle (Fig. 26.22) consists of bilateral elements having a forward pubic process, a medial ischial process and a dorsolateral projecting iliac process. *In dipnoi the two parts are fused in the midline. *In this it resembles the pelvic girdle of amphibian and the beginning of the tetrapod walking

In a biotope aquarium, the aquarist attempt to simulate a natural habitat, assembling fish species, plants, water chemistry and decorations found in that specific ecosystem. A “true” biotope should be a mirror of a natural habitat.