The internal and external body structure of cuttlefish comprised of various structures that influence their behaviors. For example, the cuttlefish brain organization contains pedal ganglion, palliosvisceral ganglion, suboesophangeal neutral tissue, suboesophangeal centres, and supraoesophangeal. All these structures also consist of other organs that play key roles behavioral changes of the cuttlefish. The anterior basal lobe regulates the cuttlefish fins and the funnel position.
Adaptation to live in the habitat lack of oxygen A. Crayfish: Crayfish lives in fresh water stream, which is an aquatic environment. The oxygen level in fresh water upper stream is higher than the lower stream, but the oxygen concentration is still low. The gills of crayfish are much bigger than the size at first glance. They occupied under the cephalothorax carapace in branched-shape and provided a large surface area to volume ratio to carry out gas exchange. Fresh water will be pulled into the cavity by the movement of the “gill bailers”.
They just need some time to make it in the new place and new water condition. They love the warm water, but when there is no option rather than cold water, they try to face it. Clownfish is not a rare fish because they can produce more fishes at the same time. They are reproductive and does not matter about the partner, they can easily find their partner. Clownfish has a scientific name is Amphiprion cells, with its family name, is Pomacentridae.
During the winter, crayfish go to the nether levels of the water, but will come back to the shores during the warmer summer months. “Unfortunately,” says Dr. Sudeep Chandra, a biology professor at the University of Nevada in Reno, “getting rid of the crayfish completely is nearly impossible with our current techniques”. Traps have been used to try and catch some of the crayfish, but nevertheless, only limited amounts have been captured. There have been experiments to find a deterrent for the crayfish. Although some have been discovered, they are too virulent to use near other species.
Jellyfish have external reproduction, where they release the egg and the sperm into the water to meet each other. As they mature the fertilized eggs reproduce asexually by cloning themselves. The methods used by the earthworms and jellyfish both offer an opportunity for predators to eat the offspring before they can
Summary: Aquatic habitats pose unique challenges to the species to capture food. Some animals and birds who feed on small sized preys cannot have sophisticated feeding structures like most other species of animals. Moving such structures in water will displace their preys along with the displaced water. For shorebirds like Phalaropes , swallowing the prey and transporting it to their mouth is yet another challenge, apart from capturing. With their long thin beaks, facing vertically down, they must capture their food along with water droplets by pecking at water, and move it all the way long up to their pharynx ,defying gravity.
When temperature decreases, all phases are lengthened in equal proportions. This suggests that the effect of lowering the temperature on the cell cycle is due to an uniform slowing down of biochemical reactions. Although it has not been studied, temperature stress may have a more specific effect, such as the induction of heat shock proteins (Alexandrov
Different organisms use different mechanisms for removing the substrate. Parrotfish use well developed jaws to munch on coral and another organism has evolved a interesting mechanism to erode a different substrate for an interesting reason. Osedax is a genus of polychaete worms that live in the deep ocean. In the case of these worms, their name gives a lot of information about their mechanism for survival. Osedax is Latin in origin and means bone-eating.
- An endostyle which secretes mucus into the pharyngeal cavity to assist with filter feeding. In some vertebrates this may also develop into a thyroid gland. - A post-anal tail. 1.2 Sharks have various ways in which they find their prey through highly efficient sensory organs: - Their olfactory organs are very sensitive (or to put it another way, they have a very keen sense of smell underwater). They are able to detect chemicals, even in small concentrations from up to 1km away.
As mentioned in the hypothesis, the prediction is that as the temperature increases towards the optimal, the rate of respiration will increase. As the temperature exceeds the optimal, the rate of respiration will decrease. The temperature of the environment can be varied by placing the respiration chamber under a temperature-controlled water bath/cooling bath. The temperatures that will be used in this experiment will range from 0ºC to 50ºC in 10ºC increments. Digital thermometer will be used to measure the temperature of air.