SharksSharks

By Marla BatistaBy Marla Batista

The FactsThe Facts

Class Class ChondrichthyesChondrichthyes 750 Various Species750 Various Species Skeleton made of cartilageSkeleton made of cartilage Bony razor sharp teethBony razor sharp teeth Lateral line systemLateral line system Oil in liver to help them sinkOil in liver to help them sink Sharp sense of sight and smellSharp sense of sight and smell Cousins are the rays and skatesCousins are the rays and skates

AnatomyAnatomyof a Sharkof a Shark

Ampullae of LorenziniAmpullae of Lorenzini

These are the jelly-These are the jelly-filled pores all over a filled pores all over a sharks body that sharks body that detect the presence of detect the presence of other creaturesother creatures

They are the sharks They are the sharks sensory device and sensory device and help them to sense the help them to sense the vibrations of fish in the vibrations of fish in the waterwater

Shark Shark ATTACKSATTACKS!! They are not as They are not as

common as people common as people think think

However, they will be However, they will be attracted to people if attracted to people if they think they look they think they look like a source of food or like a source of food or to protect themselves.to protect themselves.

Things to wear with caution at the Things to wear with caution at the beachbeach

Flippers and wet suits(look like seals)Flippers and wet suits(look like seals) Silver jewelery(silver sides or other silvery Silver jewelery(silver sides or other silvery

fish)fish) Bright colored swim suits(tropical fish)Bright colored swim suits(tropical fish) Do not have open cuts/wounds in water…Do not have open cuts/wounds in water…

blood will draw the sharks near!!!blood will draw the sharks near!!!

Alligators vs. SharksAlligators vs. Sharks

From 1948-2003, there From 1948-2003, there were 13 fatalities due were 13 fatalities due to alligators in Florida.to alligators in Florida.

In this span of time, In this span of time, there were only 8 there were only 8 Florida shark attack Florida shark attack fatalitiesfatalities

Lightning vs. SharksLightning vs. Sharks

In the span of time In the span of time from 1959-2003, there from 1959-2003, there have been 425 have been 425 fatalities due to fatalities due to lightning strikes in lightning strikes in Florida.Florida.

In the time, still only 8 In the time, still only 8 shark attack fatalities shark attack fatalities in comparison.in comparison.

What are people more prone to What are people more prone to dying to?dying to?

Bee stingsBee stings Snake bitesSnake bites Sting ray stingersSting ray stingers DehydrationDehydration LIGHTNING STRIKES!LIGHTNING STRIKES!

Localized Stock DepletionLocalized Stock Depletion

This is a fisheries This is a fisheries concept that refers to concept that refers to the depletion of a the depletion of a species in a highly species in a highly restricted part of its restricted part of its geographic range.geographic range.

Intensive fishing of Intensive fishing of degradation of habitat degradation of habitat can cause the species can cause the species to be “hole-punched” in to be “hole-punched” in specific locality.specific locality.

A hypothesisA hypothesis

Stated by the ICUN/SSC Shark Specialist Group Stated by the ICUN/SSC Shark Specialist Group of the Museum of Natural History in Gainesville, of the Museum of Natural History in Gainesville, FL:FL:

““That many, if not most, shark species are That many, if not most, shark species are philopatric for their natal nursery areas and other philopatric for their natal nursery areas and other critical parts of their ranges, such as winter critical parts of their ranges, such as winter feeding grounds. This philopathy, furthermore, feeding grounds. This philopathy, furthermore, makes them even more susceptible to regional makes them even more susceptible to regional over fishing and habitat destruction.”over fishing and habitat destruction.”

National Shark Research National Shark Research ConsortiumConsortium

Comprised of 4 major Comprised of 4 major U.S Shark Research U.S Shark Research OrganizationsOrganizations

These oraganizations, These oraganizations, together, are qualified together, are qualified to conduct studies of to conduct studies of sharks and their sharks and their relatives on national, relatives on national, international, and international, and global scales.global scales.

ResourcesResources

Http://www.oceanofk.org/sHttp://www.oceanofk.org/sharks/sharkAnatomy/htmlharks/sharkAnatomy/html..

http://www.flmnh.ufl.edu/fishttp://www.flmnh.ufl.edu/fish/sharks/sharks.htm-h/sharks/sharks.htm- website for Florida website for Florida Museum of Natural History Museum of Natural History Ichthyology DepartmentIchthyology Department

Notes from Dr. EhringerNotes from Dr. Ehringer Text Book-Text Book-