In the 1970s it began to colonise the rich, fertile, multispecies fishing areas of the Nyanza Gulf in Kenya, it was here that in the next 10 years the Nile Perch became a major component of the fish population. Until the late 1970s the biomass composition of the lake remained relatively constant, but in the middle 1980s, a survey of the lake revealed a sudden and unexpected change, a total reverse in biomass compositions. Cichlid numbers had decreased dramatically and only consisted of 1% of the total fish weight in the lake, while the Nile Perch had suddenly increased to constitute 80%. This large increase in numbers of the Nile Perch may have been caused due to the advantages it may have had over other fish in the lake. The Nile perch is a dominating predatory fish within the Lake.
These sharks have slow growth rates and reach sexual maturity at a relatively late age compared to other marine fish, which leaves their population vulnerable to any outside sources (Musick and Musick, 2011). Sharks have been apex predators in the ocean for millions of years, however, the populations of sharks have been at risk for years as a result of many different factors. The impact of overfishing on shark populations has risen into the public eye over the recent years due to several documentaries and movies that have been released recently. Sharks are particularly vulnerable to over-exploitation due to their K-selected life strategy, having slow growth rates, long life spans and due to them reaching sexual maturity at relatively late age compared to that of other marine organisms (Stevens et al., 2000). Fisherman fish for sharks in order to get their fins, which is used to make shark fin soup (a delicacy in South-East Asia).
Manatee - Florida manatee Introduction: The Florida manatee (Trichechus manatus) is a marine mammal which is also known as “West Indian manatee” or North American manatee. Manatees are occasionally called sea cows as they are similar to cows on land. Manatees belong to the family Trichechidae. This manatee is the largest, fully aquatic surviving member of the aquatic mammal “order Sirenia”. The lifespan of the manatee is 50-60 years in the wild.
The journey took 62 days, and spread over 745 miles. Why it Migrates It was shown that the Hammerhead shark mainly migrates when it is following food, such as the Mahi-Mahi. Life Cycle Hammerheads are on their own from the start of birth, so much so, that when they are born, they swim away from their mothers to avoid being eaten. The oldest Hammerhead shark ever recorded was 31 years old. Summary The Hammerhead shark is a very interesting creature, which we do not know much about.
Ambulance dials: 911is the universal emergency number where you can find immediate help. 4. Panama City Beach: One place which is known as the spring break capital of the world is undoubtedly Panama City Beach, Florida. Most commonly known as PCB, Panama City Beach host almost half million visitors during spring break every year. PCB Spring Break with its outdoor concerts arranged for spring breakers,
Japan sells the whale meat at high rates. They also mark the meat purposely, wrong so that the customers won’t know that it’s actually a whale that they’re eating. Japan also use whales for soap, tobacco, dog food, and other supplies. They say that they use whales for research, but stabbing and killing them, doesn’t sound like any research to me! Also, instead of using the money, given to them, for the poor, they use it for whaling.
I think Killer Whales should not be in captivity because, of the injures they can get in their tanks, how they get stressed out and they are better in the wild. The first reason why I think should not be in captivity is of what happens in their tank. The first piece of evidence from the PETA practical “Aquariums and Marine Parks” is that since the tanks for the orcas are usually small for them, they get insane because of the echolocation they use. This makes me think that since their fin sometimes curves, that they would get injured while swimming. In addition, this might make the whale die faster than what they are supposed to live to.
Which means the illegal practice of trespassing on another's property to hunt or steal game without the landowner's permission Which is illegal to do and you can go to jail for 1 to 5 years and a $10,000 fine and a conviction of a felony. Also people who hunt alligators have to use weapons to kill the alligator so it doesn't kill them. I know that from what i read that from the “1950s to when alligator hunting was legal in 1988, the year after alligators were removed from the endangered list.” Alligators have repopulated since up to a population of 2 million.
If they did not put any restrictions or laws then the red snapper would have gone extinct. This would of lead to many disadvantages towards fishermen and restaurants economically. If there was not any action taken immediately it would of harm our environment. This shows how humans can make a huge impact. The Red Snapper is a popular fish that needs to be preserved.
Exploratory reports demonstrate that there has been a fast increment in the harm to reefs in the previous 20 years, and researchers have motivation to accept that in two more decades, the world 's reefs will decay by 30%. Over a large portion of the world 's reefs are at risk of human damage, and 27% are in high danger. The reefs of Southeast Asia, which transpire to be the most species differing reefs on the planet, are moreover in the most