Underneath their gill slits there are blood vessels which intake oxygen from the water; some sharks keep their mouths open to breathe so it’s easier for the water to pass over the gills. Most sharks don’t have strong neck muscles so the water doesn’t easily pass over their gills, that is why they have to keep moving with their mouths open to breathe. Some sharks, which have strong neck muscles, push the water over their gills so the shark can stay at rest and still breathe. Other sharks have tiny holes over their eyes, which the water is pulled into so the shark can breathe with its mouth closed. A sharks diet is very interesting.
In the second paragraph in the article, it is stated that there is a dominant breeding pair, with zero to four non breeders, and size is the determining factor on which fish are the breeding pair. The female is the largest instead of the male, which is common in fish but not so common in mammals. According to the article, if the alpha female dies, the alpha male, the second largest fish, is the one to change sex to female, whereas the biggest non breeder grows and becomes the alpha male. This article shows that a trigger for sex change is the death of an alpha breeder, and what determines which fish undergoes the change is the fish who just so happens to be the largest. This article can be trusted because it comes from a peer reviewed journal, Nature, whose articles are submitted to reviewers who are experts in the field that the author is writing
The average weight at first maturity is about 25 kg. They spawn in two confirmed and widely separated areas. The first spawning ground exists in the Mediterranean Sea in the Eastern Atlantic (in the area of the Balearic Islands) while the second spawning ground is the Gulf of Mexico in the Western Atlantic. Although bluefin that were spawned in each area may forage widely across the Atlantic, they return to the same area to spawn. Usually, they spawn in large groups where they become highly vulnerable to commercial fishing.
Cuttlefishes Introduction: Cuttlefish are small to medium sized marine animals that belong to the class Cephalopoda, which also includes squids, and octopodes. Despite their name, cuttlefish are not fish but they are molluscs. There are more than 100 species of cuttlefish which significantly vary in size from the small ones of about 15 cm in length to the Australian giant cuttlefish which can grow to up to about 50 cm in length (excluding its tentacles) and about 10 kg in weight. Based on research findings, cuttlefish have one of the largest brain-to-body size ratios of all invertebrates indicating that cuttlefish are among the most intelligent invertebrates. Distribution and habitats: The family Sepiidae, which contains all cuttlefish, is found in shallow temperate and tropical waters.
Cephalopoda Introduction: Invertebrate animals which belong to mollusks which means “head foot” and characterized by large head and modified feet. This group includes octopuses, squid, cuttlefish and nautiluses. Members of cephalopods are characterized by their ability to quick change their color as well as changing the texture and shape of their bodies as a means of camouflage. Today there are about 800 living marine species of cephalopods which are found in all of the world’s oceans, from the tropics to the near freezing water at the poles. Description: The name cephalopods which means head-armed were given this name because these animals have several arms around their protruding mouth.
The first theory is that Nessie is a cryptocleidus, a prehistoric plesiosaur, because it is the only animal that matches the creatures characteristics (Yorke 20). Evidence to support the theory is due to a colony of plesiosaurs, which are aquatic reptiles said to be extinct 65.5 million years ago, possibly residing in Loch Ness (Redfern 118). Also, due to a minor theory that the prehistoric dinosaur may have survived Global Warming issues, on Earth (Kallen 31). Some skeptics disprove this theory by saying a plesiosaur is not a warm blooded animal and that they were not made to survive Loch Ness’ average 41 degrees fahrenheit waters (Redfern 118). The second theory is the monster is a gigantic eel, which was considered impossible because an eel is incapable of moving the way Nessie is said to move and also due to the fact they cannot be 30 to 40 feet in length (Redfern 118-119).
Echinodermata and Mollusca is the two common phylum in the kingdom Animalia. Echinodermata consist of five large classes which are, class Crinoidea, example feathers star, class Asteriodea, example star fish, class Ophiuroidea example, brittle star, class Echinoidea, example sea urchins and the class Holothroidea, example sea cucumber. Phylum Mollusca consist of six major classes, which are Monoplacophora, Gastropoda, Cephalopoda, Polyplacophora, Scaphopoda and the last class which is the Bivalvia. To begin with, in Echinodermata there are four classes that will be discuss and the first class will be Ophiuroidea. Ophiuroidea is a class of the phylum Echinodermata, which brittle star is a good example of it.
A few animals that have change in order to survive are the bull shark, the igloo viper, poison dart frog, and the red bore, according to “Costa Rica Animals”. “The Bull Shark and its Fresh Out Come” states that the bull shark had the most changes in itself in order to survive, the bull shark changed itself so it can breathe in salt and freshwater. This a huge change “according to “Freshwater biologist Smith Angel”(Costa rica and its changing habitat) says freshwater biologist Smith Angel. Because the bull shark change its lungs and cells in order to breathe oxygen from both fresh and saltwater. The Bull shark will most often go into freshwater or a river in to breed and raise its pups, “The Bull Shark will going into Fresh water only for breeding, which includes raising its pups witch is down by the mother” (Costa rica and its changing habitat) says freshwater biologist Smith Angel.
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.
It shows what and how many different types of pond animal species there are in the pond. for example in experiment A there are 4 pond snails and in experiment B there are 6 pond snails. So the table and the graph give me a brief information on how many animal species and animals of that species I found in experiment A and B. So my research shows that my hypothesis was not clearly correct because their can be other possibilities but my research supports my hypothesis. My claim was that the more plant cover their is the less pond animals or insects there are and their will be different types of species of insects in different areas.