Transcript: Since 1580 the great hammerhead shark has been responsible for 17 non fatal and 20 fatal attacks. Fun Facts Endangerment Hammerhead sharks are found in tropical warm waters. http://marinelife.about.com/od/Sharks/p/Great-Hammerhead-Shark-Sphyrna-Mokarran.htm Hammerhead sharks have a flat head with eyes on the side of the head. By, Erin , Ramzey, Ty, and Leah There are many types of hammerhead sharks but the great hammerhead shark is not endangered but decreasing. Distinguishing features Viviparous Hammerhead sharks have visual fields that overlap behind them, giving them a full 360 degree view of the world Reproduction Habitat Attack statistics Hammerhead Shark Can grow up to 20 ft. Can weight up to 1000 lbs. Can swim speeds up to 25 miles per hour. Physical descriptions Work Cited
Transcript: Economic, Endangered, Bycatch The hammer on the hammerhead is used to pin down sting rays for an easier catch; this evolution has happened because of the way the sting ray has evolved. A grown hammerhead is smart enough to determine where fishing areas are; delinquent or baby hammerheads do not have this knowledge and are often caught. Also, if a hammerhead is migrating, it may not know where the fishing areas are and might get caught as well. Ampullae of Lorenzini is used to detect faint electrical disturbances in the water, which helps the shark find prey. The lateral line tells the shark if the water is being moved around, alerting the shark to predators or prey. The hammerhead is a "mix" between the bonnethead (left) and the winghead (bottom) shark. The head of the hammerhead is like a mix of these two sharks. Swift, Fearsome, Sizable, Predatory Head of a hammerhead is used for maneuvering in the water quickly. The size -- 6 feet or 2 meters -- of the shark makes it a scary looking animal. The hammerhead is an apex predator that searches for prey and fights with other species of shark. The selling of shark teeth and shark-fin soup supports economies. Unfortunately, the fishing and killing of a hammerhead has become illegal which damages some coastal communities, but saves the hammerhead population. The hammerhead has begun to thrive again, but the fishing of them is still illegal. Hammerheads are often caught as bycatch, which also lowers the populations. Hammerhead Shark Evolved and Intelligent Fun Fact Ampullae of Lorenzini Hearing of the shark helps the animal hear boat motors and such, which alerts the shark to any threat. The hammerhead in Finding Nemo is not correctly drawn. His eyes are facing forward, which is not correct. A hammerhead's eyes and nostrils are located on the sides of the head, giving the predator a complete 180 degree view and amazing sense of smell. The hammerhead in Nemo more closely resembles a winghead.
Transcript: HammerHead Sharks Only the larger Hammerhead sharks live becuase of their hide is thicker than the littler ones. Volcano erupts underneath the water and hot magma comes and kills the fishes That would be an example of directional selection..... the fish in the area that the Hammerhead Sharks are in are all gone exept the smaller ones that the larger ones and the smaller ones dont eat. The larger hammerhead sharks eat the younger ones then the only ones left are the medium sized Hammerhead Sharks. This is an example of stabalizing selection. For my third senario you have all the fish dieing in an area from a virus and the only ones left are ones that live in small holes. The smaller Hammerhead sharks are not fast enough to get them but they can squeeze through and get the little fish. The medium sharks all die because they are not fast enough to get to the fish but cant fit in the holes to get them. The large Hammerhead Sharks all live because they are fast enought to catch the fish before they get to there holes. This is an example of distruptive selection
Transcript: Order Phylum Kingdom Chondrichthyes considered oldest existing jawed veterbraes live mostly in marine locations Family Chordata pharynegeal slits,dorsal hollow nerve cord Hammerhead Shark By:Aidan Rohr Carcharhiniformes ground sharks,most dominant with nearly 200 species,common in tropical and tempurature waters Sphyrnidae medium to large sharks,nostrils entirely seperate from mouth, two dorsal fins Domain Animalia all members,animals,hetrophs Eukarya cells that have nucleus Class
Transcript: A hammerhead shark can survive on its own 20-30 years. Hammerhead shark Hammerhead sharks are the best sharks Ive ever seen. A Hammerhead Sharks offspring is 8-11 Months. Hammerhead sharks adult weight is 500-1000 lbs. Hammerhead sharks color is brownish. A Hammer Head Sharks Adult size is 3-20 ft. A Hammerhead shark offsprings are called pups. Hammerhead sharks are so cool when the underwater. A HammerHead Shark can survive on its own 20-30 years old. A hammerhead sharks gestation period is 10-12 months.
Transcript: A hammerhead shark has been found at depths as great as 80 meters. The shark can also be found in very shallow waters. Of the 10 known species of hammerhead, only three of them are known to be particularly dangerous to humans. beause of there hammer like head. yes they do eat eachother in the womb Shark finning refers to the removal and retention of shark fins and the discard at sea of the carcass. The shark is most often still alive when it is tossed back into the water. Unable to swim, the shark slowly sinks toward the bottom where it is eaten alive by other fish. it head looks like a hammer thats were it got its name clasp·er :a pair of appendages under the abdomen of a male shark or ray, or at the end of the abdomen of a male insect, used to hold the female during copulation. The hammerhead sharks are a group of sharks in the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a "cephalofoil" the scientific name is Sphyrnidae ampullae of lorenzini are special sensing organs called electroreceptors, forming a network of jelly-filled pores they eat a large range of prey including fish, squid, octopus, crustaceans, and other sharks. Stingrays are a particular favorite. a clasper is a pair of appendages under the abdomen of a male shark or ray, or at the end of the abdomen of a male insect, used to hold the female during copulation. Basic facts The hammerhead shark gestation period is from 7 to 12 months It can grow up to 20 feet (6 meters) in length and weigh up to 1,000 pounds (450 kg), although smaller sizes are more common. Hammerhead sharks can survive between 20 and 30 years in the wild. no there not protected Hammer head shark by:Adrian
Transcript: Their favorite is stingrays They eat other fish, crabs, squid, and other sharks Have been known to eat their own kind Rarely attack humans Physical Characteristics http://marinebio.org/species.asp?id=87 http://www.iucnredlist.org/details/39386/0 http://www.ourendangeredworld.com/species/sharks-fish/great-hammerhead-shark/ Habitat Can be found both off and inshore Found in the worlds oceans In depths of 1-300 m They do migrate Not much is known but they most likely follow food They move to colder waters in the summer Length is 4m on average but can reach up to 6m Can weigh between 230-580 kg Know for distinct "hammer" shaped head Sphyrna mokarran This shape allows for a larger amount of Ampullae of Lorenzini Reason for Endangerment Predators Great Hammerhead Shark Reproduction Can be found both off and inshore Found in the worlds oceans In depths of 1-300 m Gestation period of 11 months A range of 20-30 pups born Max is approximately 55 Give birth to live pups They reproduce once every two years Their predators include humans boats and fishing nets other sharks Hammerheads can tan because they are often found close to the surface They are immune to stingray stings and have been found with multiple barbs in their face What They Eat Number of Species Step 5 Migration Amazing Fact Overfishing is the main threat They are caught for their fins Also caught in bycatch
Transcript: Diet Interesting Facts Like these There are eight different species of hammerhead shark. Adult hammerhead’s don’t have predators except for older or more powerful sharks, and sometimes orca whales. Predators Identity "hammerhead shark." Britannica School. Encyclopædia Britannica, Inc., 2014. Web. 3 Nov. 2014. <http://library.eb.com.proxy.santacruzpl.org/levels/youngadults/article/39062>. Habitat "hammerhead shark." Britannica School. Encyclopædia Britannica, Inc., 2014. Web. 3 Nov. 2014. <http://library.eb.com.proxy.santacruzpl.org/levels/youngadults/article/39062>. Diet "Great Hammerhead Sharks, Sphyrna mokarran ~ MarineBio.org." MarineBio Conservation Society. Web. Accessed Sunday, November 16, 2014. <http://marinebio.org/species.asp?id=87 Predators "To, Etition. Great Hammerhead Shark (Sphyrna Mokarran) (n.d.): n. pag.PETITION TO LIST THE Great Hammerhead Shark (Sphyrna Mokarran) UNDER THE U.S. ENDANGERED SPECIES ACT. Wild Earth Guardians, 18 Dec. 2012. Web. 16 Nov. 2014." Lifespan “National Geographic,. "Hammerhead Sharks - Hammerhead Pictures - Shark Facts - National Geographic." National Geographic. National Geographic, n.d. Web. 16 Nov. 2014.” Population and Endangered Power Knowledge. "Santa Cruz Public Libraries' User Authentication." Santa Cruz Public Libraries' User Authentication. Rosen Digital, n.d. Web. 16 Nov. 2014. Interesting Facts “National Geographic,. "Hammerhead Sharks - Hammerhead Pictures - Shark Facts - National Geographic." National Geographic. National Geographic, n.d. Web. 16 Nov. 2014.” Large great hammerhead sharks can grow to be 20 feet long and weigh up to 1,000 lbs. Identity Hammerhead sharks primarily eat stingrays and small bony fish. Habitat Population and Endangered Status Like this the scalloped hammerhead sharks are endangered everywhere in the world Hammerhead Shark Sphyrna gilberti They commonly swim and live in tropical and temperate waters all over the world. Those are the areas where hammerhead sharks swim. Bibliography Lifespan Average life span in the wild: 20 to 30 years. They are the most recognizable shark due to the flat double sided hammer like shape of their head.
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