Shark Population Lab Report

Andy Dehart, Discovery Channel Shark Advisor, spoke about the North Carolina shark over fishing problem. The shark populations on the East Coast were extremely over-fished which lead to the over population of sting rays, a main food-stock for sharks. The stingrays in turn decimated the shellfish populations on the East Coast, leading to calm and shellfish shortages. This shows that sharks are necessary for every eco-system and their destruction affects us in more ways then we can imagine. Sharks are very at-risk for over-fishing because they take a long time to reach the stage where they can reproduce and in general only have a few pups when they give birth.

Fishermen over fished the cod population till 99.9% was gone. Fishing laws were placed to stop fishing in order to allow for the Cod population to occur. Carroll states even though there were laws to protect the codfish but the effect of overfishing still is present. Overfishing made the overall codfish size smaller.

We need to protect the great hammerhead shark because it is being poached and there are only 9 Species of hammerhead shark . One reason great hammerhead sharks are endangered is because People are illegally fishing the great hammerhead shark and other species of sharks for a traditional soup called shark fin soup. When they catch these sharks they cut off the fins and throw them back in the water and they sink down to the bottom of

These fish have become incresingly popular due to the films “Finding Nemo” and “Finding Dory”. Although there is no evidence of population decline thus far, increased demand will cause more fish to be caught, which will decrease populations because there has been no record of successful breeding in captivity (Bradford

Theories for its extinction are the decrease of temperature in the water and its prey migrating into colder waters. However, some refuse to accept that the Megalodon shark is extinct. They believe the shark migrated to lower waters and feed upon undiscovered creatures. We will not know until we go down in the deepest depths of the oceans, discover a fresh “megatooth”, or have a

To conclude, the ocean is ultimately the sharks home and it has been for millions of years and we are intruding on it though all of the point brought forward you can clearly see that rouge sharks should be let go sharks kill barley any people compared to a lot of others, they don’t go out of their way to eat humans and the general public is convinced by the media that sharks are evil man eaters this leads me to believe that sharks should be let be evacuate the beach and let the shark move on, once the shark has moved on think of shark prevention tactics such as nets, shark shields, extra patrols

Changes in predator abundance can cause cascading effects to the ecosystem structure, functioning and resilience (Baum & Worm, 2009). Due to the sperm whales’ large body size, large population size, high trophic level and potentially important role in top-down control of cephalopods, the impact of their reduction may be more significant than that of other species. North Pacific sperm whales are significant cephalopods predators. Removal of sperm whales in the North Pacific could lead to dramatic increase in abundance of large squids, subsequently leading to the decline of sardine landings (Croll, Kudela & Tershy, 2006). This could majorly tip the fragile balance of the marine

Provided that sharks have not been fished out of certain areas it is reasonable to assume that their disappearance would be a result of the destruction of a suitable habitat. The fact that shark species are so diverse and inhabit every ocean on the planet makes them key players essential to the ocean environment. Yet despite their importance in the marine food-chain they remain a low conservation priority. For all their evolutionary success and apparent menace, sharks are incredibly fragile, unable to withstand the increased pressures forced on them by the voracious world fishing industries. This is partly due to the fact that sharks are slow growing animals that mature late, live long, and have a low reproduction

and it is not safe for anybody to swim with sharks. So people are now saying that we need to kill the sharks before they have the chance to attack us. Sharks started hunting people after they saw them pondering around in the ocean. By researching people that hunt sharks are saying that it is easier to

Human beings can be attacked by sharks. Most shark attacks are caused by particular shark species. They include Carcharodon carcharias, Galeocerdo cuvier, and the Carcharhinus leucas. Historically, shark attacks are on the decline following increased global awareness on the menace. Shark attacks are most common in the United States waters than the rest of the world because of difference in climatic

Sharks are nicer than us! Secondly, many see shark attacks on tv, wondering just some sharks dangerous? Yes.

An excerpt from “Sharks Endangered” written by Sharks World Website states that “M[m]any types of sharks are at risk for becoming extinct.” If some shark species go extinct then there will never be a chance for those sharks to re-populate and the whole ocean would be changed forever. Sharon Guynup, a writer for Science World, claims that “W[w]ithout sharks the ocean 's delicate ecosystem would be disrupted.” If sharks were to go extinct the whole ocean ecosystem would be wrecked.

That, she speculates, is because in places where sharks were once de-finned and their carcasses dumped at sea, now whole sharks are being delivered to port. While their fins would remain the more valued item, it is likely that fishermen may be selling the meat and creating new appetites for a product that wasn't before utilized – bad news for sharks,”

If fishing behavior increase, it will be a decline in shark population. There is a significant difference between cruising swimming and filter feeding speeds of basking sharks. Experimental design: • Cruising swimming speeds and filter-feeding of basking sharks. In 100-km area in the western basin of the English Channel, basking sharks were sited and chased. Six basking sharks were measured (4.0–6.5 m body dimension).

What is shark finning you inquire? Shark finning is the evacuation of a shark 's balance then the remaining parts being tossed over the edge alive. The shark is frequently still alive when it is tossed into the water, finless. They can 't swim without balances thus they will sink to the sea depths to be eaten alive by other fish. Finning of sharks happens adrift as it is just the blades they require, shark meat is a low esteem and is unneeded.