Fish migration

The lecturer talks about strange sounds that Russian submarine crews called quackers. She contradicts each theory of the reading, saying that they have certain problems. First, the theory that suggests that the strange noises were calls of ocra whales during a courtship ritual. The lecturer refutes this point by saying that this theory is highly unlikely, because the ocra whales lived near the surface of the ocean and the submarines cannot be able to detect in the deep ocean. So, what is state…

“The sea, once it casts its spell, holds one in its net of wonder forever,” an infamous marine biologist, Jacques-Yves Cousteau once said. He knew this spell well, enduring many dangerous marine trips in the waters surrounding his home country of France. The French-Marine explorer sailed around the world, learning about the organisms inhabiting it. This would not have been possible without his invention of scuba gear. Students study him in order to get a better understanding of marine biology.…

In trial 2 both seals and whales showed a higher rate of population. Seals are a source of food for the whale. Moreover, the higher the seal population the higher capacity of a whale. The whale is the predator to the seal, which is the prey. However, if the death rate of whales increases then, the population of seals will increase also. Only, the seal population will increase because with the decrease of whales the seals have a higher chance of living, especially with the fact that seals…

The giant squid has eluded scientist since its discovery with nothing but pictures and carcasses to go off of. Its deep-sea habitat makes it difficult to study. The first photo of a live squid was not taken until 2004 and the first live giant squid to be brought to the surface was not until 2006. The giant squid belongs to the phylum Mollusca, class Cephalopada, genus Architeuthis, and species Architeuthis dux. Giant squids are similar to their smaller relatives in many ways including, using…

Zebra Mussels in large numbers are known as colonies and can contain millions of individual mussels. They’re known as an exotic invasive species because they are nonnative to US waters. Unlike our native Kansas mussels, Zebra Mussels don’t require a fish host to complete their life cycle. One female Zebra Mussel can produce up to one million eggs, which within months they are adult mussels. Zebra mussels were first introduced to the United States in 1986 and are believed to have entered the US…

pass and you can tell that whatever is on the other end of the line is just as tired as me. I can see the end of the line in the water, and I get a second wind. I've finally reeled the fish in. The first mate reaches into the water and pools up the rig and on it...are three fish! 2 striped bass and a 35 inch blue fish. The first mate says “that's the biggest bluefish i've ever seen anyone catch.” I ask how long are the bass and the first mate says “none of them are over 35”. Even after hearing…

Sanibel island is the heavenly holiday destination for all those who enjoys fishing. This place is the best excursion destination for both professional or a novice, as both will have an excellent experience with whatever type of fishing they prefer. If you’re new to fishing or would adore to try a type of fishing you’re not familiar with than Sanibel is the perfect place to be. If you have reserved Sanibel Island as your holiday destination just because of your passion for fishing, then to have…

diet of many transient killer whales in the North Pacific Ocean that was once thought. They identified three particular ecotypes of whales observed in the North Pacific which include residents and offshores that both feed primarily on other smaller fish, and transients which feed on marine mammals. The research involved acquiring four female killer whale specimens from four different locations. Two of these killers were West coast U.S. transients, one was an Eastern Tropical Pacific pelagic from…

Once in the ocean, young leatherbacks still face predation from cephalopods, requiem sharks, and various large fish. Despite their lack of a hard shell, the huge adults face fewer serious predators, though they are occasionally overwhelmed and preyed on by very large marine predators such as killer whales, great white sharks, and tiger sharks. Sea turtles are dependent…

Introduction. Sharks have been around for hundreds of millions of years Subclass Elasmobranchii: Sharks and Rays are classified in the Kingdom Animalia, Phylum Chordata, Class Chondrichthyes(Greek, chondr- 'cartilage', ichthys 'fish'), and Class Elasmobranchii. Elasmobranchs are fish which all share one main characteristic: cartilaginous skeletons. There are over 1,000 species of elasmobranchs ranginging from great white sharks, to spotted rays to sawfish to skates. Sharks and rays are the…