Cray Fish Lab Report

Another good reason to setup a biotope aquarium is to see the fish interacting in their “natural” environment which is completely different from what you will see in a community setup. In my opinion, there are several types of biotopes. 1. The true Biotope is a recreation of a specific

Pond Ecosystem Investigation Lab report By: Harshal Buradkar 9 grade Introduction A pond ecosystem consists of abiotic: light intensity of the water, depth of the water, and biotic: fish, plants, bacteria, algae, insects and etc. It also contains water and plants which is the most important part of the pond. Ponds are mostly shallow with the depth of 12-15 feet in which the sun rays can touch the bottom of the pond so that plants can grow. My aim is to find out how the plant cover affect the biodiversity of animal life in the pond. Experimental question How does the plant cover affect the biodiversity of animal life in the pond?

Bony fish have gills as part of their gas exchange system. They inhabit water. The amount of available oxygen in water in comparison to air is significantly less. This means that fish must be adapted to extracting oxygen from their environment more efficiently than that of other organisms. As a result of this they have a blood association system.

They have well-developed and symmetrical gills over which drawn water flows. The flow of water carries the waste and reproductive products. Movement: Although abalones occur in the same place, they may use their muscular foot with its suction power to move, cling and stay tight with the substrate surfaces. Feeding habits: In nature, abalone eats marine algae with a particular preference to large brown algae such as giant kelp and other kelp species. While juvenile abalone grazes for algae, diatoms and bacterial films, adults rely on drift algae, and if food becomes scares, they move after their food.

Once you feel that you have a fish on the line, you can set the hook and bring in the fish. This method is a good way to make sure that overfishing does not happen. Overfishing is when a body of water gets fished so much that the fish population is almost extinct in that body of water. Overfishing happens a lot more often when people use different fishing methods like cast nets. Cast nets and trolling lines are where a fisherman places nets deep in the water, and they extend from ten to one hundred feet.

As water moves through the gills oxygen gas is picked up and taken in by the blood vessels. The water is moved upward, forward, and out of the crayfish through the mouth. With the current of the blood, the oxygen is taken towards the tail and up towards the heart. By the time the oxygen gas has reached the heart most of it has become poorly oxygenated. The heart continues pumping ad when passed by the green glands any material not needed is excreted.

Fish for Small Unheated Aquariums and Goldfish Bowls Filed under: Aquarium Fish Tanks andFish Tank Design andFreshwater Tropical Fish Certain fishes are often kept in bowls or small plastic aquariums that lack heating and filtration equipment. The fish most often kept in this way include goldfish, bettas, white cloud mountain minnows, and danios. Each of these fishes have different pros and cons when it comes to keeping them in this fashion. Goldfish, Carassius auratus: Superb in Large Unheated Aquariums Goldfish grow. Common goldfish can grow up to approximately 12 inches in length which is larger than some of the containers the juveniles are kept in.

This absence of light leads to multiple challenges for organisms living in the deep sea, such as obtaining food, escaping prey and finding mates. Many organisms get past these challenges by the use of a spectacular adaptation called bioluminescence,

CHAPTER 2 LITERATURE REVIEW 2.1. The larval fish stages Fish larvae are part of the fauna that eat smaller organisms. According to Leis and Ewart, (2000) they characterize larval stage to end with the fulfillment of full outside quantitative feature characters, the entry of any mobile structure. For the larval stage according to Termvidchakorn and Hortle, (2013) the larval stage can be divided into three which are yolk sac stage, pre-larval stage and post larval stage; whereas according to Leis and Ewart, (2000) the larval stage is divided into segment that outlined by formation of the caudal fin and flexion on the notochord. Ahlstrom and Ball, (1954) stated that the terminologies of the development stage of larval fish divided into yolk

Arthropods have mouthparts adapted for piercing vegetation and sucking out plant juices, whereas Molluscs possess a radula that consists of rows of teeth that enables the animal to scrape algae from surfaces of rocks. Lastly, Arthropods and Molluscs both engage in filter-feeding, although not entirely similar. The bivalve molluscs filter-feed fine particles from the water, and similarly, barnacles from Arthropods also filter-feed with their legs. However, according to Bryant (n.d.), Molluscs such as clams and mussels are internal filter feeders because “they bring in water through one opening (the incurrent siphon), pump it through the filter to remove microscopic food particles, and discharge it through another opening (the excurrent siphon)”. In contrast, Arthropods like Barnacles are external filter feeders, in which no water is pumped through the filter.