Hammerhead Sharks Essay -- essays research papers fc

fuckhead SharksMarine Science/ Per. 1     Sharks ar one of the most fe ard ocean animals. They live in oceansacross the creative action but are most common in tropical waters. on that point are over threehundred fifty species of sharks. They can be broadly categorized into the adjacent four groups Squalomorphii, Squatinomorphii, Batoidea, andGaleomorphii. The shark family Sphyrnidae that includes the Hammerheads arepart of the Galeomorphic classification. They are probably the most easilyrecogniz qualified of entirely the sharks. The Hammerheads are among the strangest lookingsharks. As the name indicates they have a form head which resembles thehead of a throb. Their eyes and nostrils are at the ends of the hammer. on that pointare many species of Hammerheads. There are eight living species of dunderheads.The following four are the main categories1. Scalloped fuckhead (Sphyrna lewini)-Pectoral fins are reorient with blackthis grey shark. The maximum length is about 12 feet.2. bonnethead (Spyrna tiburo)-With a head straind like a shovel the bonnetheadrarely grows more than four feet long. This shark is commonly seen inshore.3. Smooth hammerhead (Sphyrna zygaena)-Bronze with dusky fin tips, it can growto thirteen feet.4. Great hammerhead (Sphyrna mokarran)-Attaining a length of a possible 18 feet,this is the largest and most dodgy of all the hammerheads.     One of the most interesting things about the hammerheads is the uniqueshape of their heads. Ever since scientists started to study the hammerheadthey have speculated about the use of the hammer. The hammer is a complexstructure and probably serves more than one function. The most importantfunction of the hammer according to scientists is increased electroreceptivearea and its sensory(a) perception. This means that the hammerhead has aremarkable sensory ability to get hold the small electrical auras surrounding allliving creatures. Under accepted condi tions, such as in searching for woundedanimals, the electrical activity increases helping the hammerhead to feed. Itis also believed that the hammerhead may be able to use the Earths magneticfield as a source for navigation. both(prenominal) hammerheads migrate a lot and may relyon this create in compass sense to guide them in the open ocean. some other use forthe hammer is to enhance maneuverability. The hammer... ...heads go there for mating purposes. Observations in thesesea mounts show that the majority of hammerheads there are fe potent. Thisindicates that its easy for the male to find a mate. However, researchers weresurprised to find that there were many juvenile female hammerheads at the seamounts. This led them to believe that in extension to reproduction there must beother reasons for coming to the sea mounts. It is believed that the sea mountsserve as navigational centers. Each evening the hammerheads sire a ten tofifteen mile drown away from the mount, always re turning by dawn or the followingday. It seems that they spend the nighttime at distant deep water feeding grounds.The young females enrol in these long distance swims. The sea mountserves as a navigational center helping them find their way back. The nightlyswim help the young find nutritious food which helps them in their growth.BibliographyKlimley, Peter, "Hammerhead City", Natural History, Oct. 1995, pp 33-38. Martin,Richard, "Why the Hammerhead?", Sea Frontiers, May-June 1989, pp. 142-145. Moss,Sanford, Sharks, Prentice-Hall, 1984. World platter Encyclopedia, Sharks, WorldBook Inc., 1988.