Rhizoprionodon Porosus

Sharks grow slowly and reproduce at a low rate. Their natural rate of replenishment is low, because they reproduce late in life and produce few offspring (Sims and Reid, 2002). If too many of a certain shark species is killed in a certain area, it is possible that that species may never recover. For example, the number of dusky sharks and sandbar sharks off the eastern United States decreased by more than 80% between 1985 and 1995. The sand tiger shark and the great white shark are threatened world-wide. Despite reproduction, little is known about the status, behavior patterns, and their migration patterns of most

The Santo Stefano Lizard, Podsrcis Sicula Sanctistephani, went extinct in 1965. The Santo Stefano Lizard lives on Santo Stefano Island and is also a Mediterranean type. The lizard likes being near a lot of water. The species ranged out to Italy, South Of Alphs, Sicily, Saradinia, and many other islands. The lizard has been introduced to a number of sites in the United States, Libya, And Tunisia (broom02.revolvy.com). The Santo Stefano Lizard lives on Santo Stefano which is a very small island near Ventotene and its off the west coast of Italy. A feral cat and snakes killed off most of the population.

Loss of genetic diversity in natural populations has often been attributed to a severe reduction in population size. Testing of nine loci in three heavily fished areas concluded that all loci that were strongly polymorphic in the 1982 study showed a reduction in heterozygosity with the exception of one

The cause of this debate comes with the return of White Sharks to the area. Over the past few years, there has been an increase of this apex predator to our coasts like never before seen, most notably since Labor Day weekend in 2009. Five sharks had been tagged by a marine biologist, Greg Skomal, and have been closely tracked and documented since. Skomal is a key player in this research as project leader

The Eastern Grey Nurse Shark inhabits Australia as a genetically distinct population from its Western counterpart, and has been labeled a “Critically Endangered” animal by the Environment Protection and Biodiversity Conservation Act of 1999 ("Australian Threatened Species”). The population is found along the coast of Queensland and Narooma, the southern area of New South Wales, and various efforts have been put in place to conserve the species (“Grey Nurse Shark,” 2016). As such, the conservation methods put in place are not sufficient and further steps are necessary to allow the species to recover from its human-induced endangerment.

The sharks are protected by the protection act since 1999, but Orgias (2012) reported the shark amounts will drop 60% to 95% in 50 years. Although, the decline will be slowed down by the protection act, but the increment still far less than the reduction. One of the reason is the sharks not really been protected, there are no evidence to show the sharks numbers have recovered since they have protection claimed by Wellbelove (2012). Another reason is the Sharks need a long time for pregnancy and reach to maturity period, so it is difficult to show the amounts of the shark have an apparent

Another purely spatial analysis was run to scan for clusters with low-risk rates with a maximum window size set to 50% as before. The resulting cluster was made of the counties of the northern most part of Texas, all of the coastal counties of Louisiana and Mississippi and the most western county in Alabama, which in Figure 9-12 is represented by regions 57-71. There is a relative risk of 0 and a p-value of 0.000016 (see Figure 8). Since the p-value of 0.000016 is less than alpha of 0.05, the null hypothesis that there is an equal chance of being bitten by a shark is rejected; it can be concluded that there is a lower risk in this region than all other regions studied as represented in Figures 9-12. When the retrospective space-time analysis is run in SaTScanTM for high rates, produced four clusters, but none of the p-values are less than alpha at 0.05. It appears that from 2004 to 2005, the risk of being bitten by a shark was heightened, and there is a relative risk of 22.46 (see Figure 13). When scanning for low rates, there was a relative risk of 0 from the coast of eastern Louisiana to the central part of the Gulf Coast of Florida for 1994 to 1998 (see Figure 14). The p-value for this

“The pocket shark we found was only 5 and a half inches long, and male,” said Mark Grace of NOAA Fisheries’ laboratory in Pascagoula, Mississippi. The shark's unhealed umbilical scar indicates it was only recently born, a point that raises questions about its birth place and the location of its parents. The other pocket shark was found 36 years ago off the coast of Peru, while this infant was found in Gulf of Mexico. This leaves a lot of unanswered questions for researchers like Grace, who have little information on the range Mollisquama occupy, or where they breed and

Did you know that goblin sharks are the rares shark in the sea lets talk about that.

The Tyrannosaurus, also known as the T-Rex, are some of the biggest carnivores that roamed this planet. A large one would weigh about 6,000 Kilograms. A large T-Rex was 12.3 meters long. It could crush bone with a single bite. It ate the big 3 witch are the Hadrosaurs, Ceratopsians, and Ankylosaurus. In the stereoscopic arc(witch is where both eyes meet) the T-Rex could see 3-D. It’s name means tyrant lizard. The T-Rex was tall but not the tallest carnivorous dinosaur.

Recent studies from the article “Hammerhead shark migration gives new hope for conservation” discusses how these hammerhead sharks have been listed onto the IUCN (International Union for the Conservation of Nature) since 2007, also having certain regulation about international trade threatening species going extinct. Dr. Tristian Guthridge explains the benefits of understanding the shark’s behavior and more research of where these sharks are migrating, and possibly manage the time of fishing in the areas to eliminate human and shark altercations. With the wide spread of ocean water it can be difficult to study the traveling of sharks; however, the research group was able to tag the sharks “with both acoustic and satellite tag, and use photo identification and laser photogrammetry” (Charlie Huveneers).

The blue crab Callinectes sapidus is a wide-ranging, ecologically and economically important species along the Atlantic and Gulf of Mexico (GMx) coasts of North America. Consequently, its basic biology, life history, population genetics, and demography have been the subjects of numerous studies. For my dissertation research, I propose to focus on two critical areas concerning the ecology and evolution of blue crabs that have broader implications for our understanding of marine organisms with biphasic life cycles. For the first chapter I will investigate the unusual finding of extreme temporal and spatial variation in the genetic composition of settling blue crab larvae along the Texas coast. Since it was reported in 1993, this finding been

In the more recent Miocene era and Pliocene era, approximately 16 to 2.5 million years ago, the Carcharocles megalodon roamed the world’s oceans (Pimiento & Clements, 2014). A complete C. megalodon skeleton was never discovered, but a trend in size increase along the megatooth lineage suggests that the species could have reached a length of up to 60 feet (Pimiento & Balk, 2015). This makes the C. megalodon the largest shark known in existence. In addition, typical adult C. megalodon teeth measured 15 centimeters in length (Bendix-Almgreen, 1983). A closer analysis of the teeth reveals a serrated crown with approximately 13 nodules per centimeter (Bendix-Almgreen, 1983). The size and morphology of a C. megalodon tooth indicates that the species

There are many fish in the reefs of the Caribbean. They come in every color, shape, and size. The Caribbean shark is no the biggest shark out there, but it can still be a fearsome hunter. It is nine feet long and can smell a bleeding fish from great distances. The goliath grouper is a giant fish with an impressive diet. It will eat octopus, young sea turtles, small sharks, and even barracootas. It is endangered because of excessive fishing. The reefs are full of colorful fish and predators, including angel fish, butterflyfish, blue tang, ocean surgeon, doctor fish, damselfish, beau Gregory, sergeant fish, chromist, sunshine fish, hamlet fish, Jack fish, runner fish, permit, porgies, mojarras, chubs, spadefish, tarpons, barracootas, bonnet moths,

There is a need for shark research to be done worldwide (“Science”). Even though South Africa is a popular spot for ecotourism, “tourism to areas of ecological interest (typically exotic and often threatened natural environments), especially to support conservation efforts and observe wildlife,” there is