There are many different species of Algae which can range in size from microscopic to a couple meters long. Phytoplankton is at the bottom of the food chain and is eaten by small crustaceans which are called Zooplanktons. Zooplanktons are eaten by fish, invertebrates, mollusks, ducks, and turtles. • Plants: Around fifty species of food and shelter providing plants- Plants along with Algae provide the Rideau River with oxygen. Some of the plants in the Rideau River are carnivorous.
Exercise 1: Data Interpretation Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organism requires 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 ppm—or parts per million. Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water from which the sample was taken; finally, answer the questions below. Table 4: Water Quality vs.
In order to breathe, an organism must be able to take oxygen into its body. Fish are able to breathe by swimming along and letting water pass through their mouth, over their gills, and out the operculum, or gill flaps. The fish is not actually breathing water, but is absorbing the dissolved oxygen that is in the water. Fish like all other organisms need oxygen in order to produce energy and survive. (Ramel).
Location 1 was above the high tide mark, Location 2 the tidal rock pools and location 3 the low tide mark. Many different creatures were identified in each of the areas. One of the organisms that was identified during the investigation was Tessetoporas Roseas (Barnacles). There were zero barnacles found in location 1 and 2 and 557 barnacles found in location 3 per 0.5m2. Location 3 (low tide mark) has many biotic pressures such as wave action, fluctuations in water temperature and predators.
Do background research – Utilizing at least one scholarly source, describe how the dissolved oxygen content in a body of water can effect fish populations. Answer = If there is more dissolved oxygen in the water, there will be more fish present in the area the water sample was taken. But if there are low levels of dissolved oxygen it may result in fish mortality. 3. Construct a hypothesis – Based on your observation in question 1 and your background research in question 2, develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water?
One important discovery Shubin made is Tiktaalik, which is a 375 million year old fossil. Tiktaalik is a fish that has scales and gills, but its head is flattened like that of a crocodile. Like most fish, Tiktaalik’s fins have ray bones enabling them to paddle in water, but the most amazing thing about it is that it has interior bones which allows it to lift off of the sea floor, something unordinary for a typical fish. It would use its limbs for support like a tetrapod. Shubin shows how fin structures of fish like Tiktaalik mark the beginning of the evolution into the mammalian paw and opposable thumb structures in the hands of today’s primates.
Some lake dwelling lines may become planktonic feeders. While in flowing waters populated with salmonids, trout eat varied fish eggs, including salmon, cutthroat trout, as well as the eggs of other rainbow trout, alevin, fry, smolt and even left-over
It has red or orange antennae, lacks hair, and its claws seem rough or grainy. This hermit crab will pick a shell it can pull its entire body back into. I saw both P. hirsutiusculus and P. granosimanus in the same tidepool at Rosario recently. A third species to watch for is Pagurus beringanus. This species is usually subtidal but may occasionally be seen in very low subtidal areas.
Finally it is drained into the ocean. 13. What makes some jellyfish so dangerous? Why was Marlin not affected? Most jelly fish are dangerous as they sting other creatures, when touched by one of their tentacles.
They have been known to feed on fish, dolphins, whales and seals. Sharks prefer meals with a high fat content to give them energy. They are ambush hunters, taking their prey by surprise from underneath. They have been known to come up from the bottom so fast that their entire body has left the water. The Great White has only one natural predator, the orca.