As the ppm of dissolved oxygen increased so did the amount of fish there were in the water. Clearly, the fish prefer to be in water that has more ppm of dissolved oxygen. 2. Do background research – Utilizing at least one scholarly source, describe how variations in dissolved oxygen content in a body of water can affect fish populations. Answer = Based on research done by Elshout, Pires, Leuven, Bonga, and Hendriks, lower Dissolved Oxygen levels have a major impact on the fish population and reproduction.
Like all bacteria, Clostridium botulinum may only grow under the right conditions. It is an anaerobic bacterium and so it will only grow in an environment where there is little or no oxygen present. It also requires temperature to be somewhere between three and fifty degrees Celsius. The optimum temperature of clostridium botulinum for developing the toxin is thirty five degrees Celsius. PH is also a factor affecting botulinum growth as it will
INTRODUCTION Nereis succinea (commonly known as clamworm) are in Class Polychaeta. N. succinea belongs to a free-swimming group of worms. They have bristle like appendages which are used for respiration and allow them to swim or crawl along the sea floor (Campbell, 2008). N. succinea is ubiquitous in number and commonly resides in estuaries. Some species can also be found around mudflats and sand flats which are high in salinity.
Activity 1.23 The effect of caffeine on heart rate of Daphnia Aim and Introduction Daphnia (also known as water fleas) are small aquatic crustaceans commonly found in fresh water ponds and lakes. Daphnia are primary consumers (they feed on algae) and are important prey organisms for many fish and other animals. The most obvious effect of caffeine in humans is that it raises the heart rate and makes us feel more energetic. As a matter of the fact, caffeine is the most popular drug in the world. In humans, nerve cells synapse with the pacemaker (SAN) region of the heart in the right atrium, which then initiates the heart beat/cardiac cycle.
In thermohaline circlulation, differences in the termperature, density, and salinity of ocean water masses cause the nutrient-rich deep ocean water to rise and mix with suface waters Along the ocean floor you will find many creatures like plants. You will find these kinds of plants like the sponge, sea urchin, and the sea anenome.these plants are all very unique! If we were to group the plants into three major groups, they would be classified as coral weed, sea weed, and various forms of kelp. Some major animals are sharks, fish, and whales. There are many individual species in each of the categories.
lReading 01 Sentence Simplification Question 01 01 Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. (A) The existence of the phytoplankton that are an integral component of the nourishment system is dependent on the existence of the organisms. (B) The relationship between the organisms and the phytoplankton ensures that there is adequate nutrition for the creatures that inhabit the area. (C) The organisms act as the foundation of the restricted food chain in a manner that is comparable to the role of the phytoplankton.
Although redclaw are less aggressive, shelter is still required to achieve uniform growth rates, as large crayfish dominate small crayfish. Unlike redclaw, yabbies are known to burrow into dam walls. Research suggests that burrowing is a survival response to a declining water level. Habitat Bottom dwelling scavengers, like to live in debris and vegetation in the water. Burrows underground during the warmer periods.
Once in the bloodstream or digestive system, the bacteria can be life threatening as it will spread and multiply rapidly. Staph infections are easily treated with common antibiotics. However, a form which was once found only in hospitals (MRSA), but is now widespread, is resistant to most known antibiotics and can only be treated with expensive narrow spectrum antibiotics. Aside from your skin, a favorite place for Staph and MRSA bacteria to live and grow is in your nose. Bacteria like Staph love moist and warm places like the nose, upper respiratory system, groin and arm pits.
Lab 1 – Introduction to Science Exercise 1: The Scientific Method Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organisms require oxygen to survive, it is a necessary component of water systems such as streams, lakes, and rivers in order to support aquatic life. The dissolved oxygen is measured in units of parts per million (ppm). Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from and then answer the questions below. QUESTIONS 1.
Daphnia are members of the order Cladocera, and are one of the several small aquatic crustaceans commonly called water fleas because their saltatory swimming style resembles the movements of fleas. Daphnia live in various aquatic environments ranging from acidic swamps to fresh water lakes, ponds, streams and rivers. The heart is at the top of the back, just behind the head, and the average heart rate is approximately 180 bpm under normal conditions. Daphnia, like many animals, are prone to alcohol intoxication, and make excellent subjects for studying the effects of the depressant on the nervous system due to the translucent