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Behaviors & Reproduction of sharks - PowerPoint PPT Presentation

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Desiree Victoria Michael. Behaviors & Reproduction of sharks. Behaviors. Sharks have sensitive receptors, for the protection of stimuli. They have a lateral line organ, that detects vibrations and sounds over long distances.

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Desiree victoria michael




Behaviors & Reproduction of sharks


  • Sharks have sensitive receptors, for the protection of stimuli.

  • They have a lateral line organ, that detects vibrations and sounds over long distances.

  • Sharks detect electric fields given off by other organisms, the tiny pores that detect them are called ampullae of Lorenzini.

Behaviors continued
Behaviors (continued…)

  • The contraction of powerful muscles allow them to move extremely fast.

  • Many sharks have to be in constant motion, or they will sink to the bottom.

  • Sharks have constant tooth growth.

  • They have an oily liver, which increases shark buoyancy.


  • Internal fertilization

  • Male sharks have claspers, which are located between their pelvic fins, that allow them to transfer sperm into females.

  • Sharks have internal development.

  • Sharks can stay inside their mmothers for a long time before even being born.

  • They develop predatory instincts within their mother, and sometimes even eat their siblings.

Shark attack

Shark Attack

Danny, Morgan, Tavieon

Groups of fish s

Groups of Fish’s

Erica Miles George SmithJaleel McCrae

Jawless fishes
Jawless fishes

  • Only two classes of jawless fish Lampreys and Hag-Fishes

  • No teeth or jaws

  • No Vertebrate

  • Lamprey’s head takes up most of the body

  • Hagfish lack eyes

  • Hagfish feed on dead or dying fish

Sharks and their relatives
Sharks and their relatives

  • Class of Chondrichthyes

  • Relatives are rays, skates, and a few uncommon fishes

  • Most sharks has large curved tails

  • Also has a torpedo shaped body and pointed snout.

  • Not all sharks have fierce looking teeth

Bony fish
Bony Fish

  • Class of Osteichthyes

  • Belong to a group called ray-finned fishes

  • “ray-finned” refers to the slender body

  • Other type of species is lobe-finned

  • “lobe-finned” has supported bones

How to save sharks
How To Save Sharks!

  • Tagging them.

  • Catch limits and quotas for commercial and recreational fishing and have been put into effect to protect various shark species.

  • Cut down fishing.

Info about sharks
Info About Sharks

  • Shark is called an apex predator meaning that it is at the top of ocean food chain.

  • Some sharks take as long as 15 years to mature.

  • Sharks only reproduce once every two years and produce few off spring

  • Sharks have cartilaginous skeleton, instead of a heavy bony skeleton like land animals.

  • Sharks engage in different forms of communication. Although sharks are loners, they have the intelligence to communicate.

Cartilaginous fishes

Cartilaginous Fishes

By: Rasheed Oridedi

Khalil Snead

Daje Reeder

What is a cartilaginous fish
What is a Cartilaginous Fish?

  • Fish whose entire skeleton is composed of cartilage.

  • They are jawed fish

  • Have placid scales, tiny teeth that are deeply embedded in skin

  • Gill silts

  • Rigid fin

Cartilaginous fish cont
Cartilaginous Fish Cont.

  • Breathing holes, called spiracles, located on thei dorsal side behind each eye.

  • Ventral mouth (usually an adaptation for bottom feeding).

  • Inhabit coastal waters from Virginia to Brazil& the gulf of Mexico.

  • 24 or more teeth that stick out on each side.

  • Uses snout to stun & kill.


  • 350 known species of sharks.

  • Smallest shark is pigmy shark (25cm long)

  • Largest of all fish- the whale shark



Tyquan Morgan, Jordan Manns, Kimberly Whittaker

General info
General Info

  • Fishes are aquatic vertebrates: most fishes have paired fins, scales, and gills

  • Fins are used for movement, scales for protection, and gills exchanging gases.

  • Fishes were the first vertebrates to evolve.

Ancient fishes
Ancient Fishes

  • The evolution of jaws and the evolution of paired fins were important developments during the rise of fishes

  • The earliest fishes to appear in the fossil record were odd-looking, jawless creatures whose bodies were armored with bony plates

Form and function in fishes

Form and Function in Fishes

By Ebony McPherson

Kenneth Sherrod

Chaska Blackburn

Basic info
Basic Info.

  • Adaptations to aquatic life includes various modes of feeding, specialized structures for gas exchange, and paired fins for locomotion.

Feeding and respiration
Feeding and Respiration

  • Every mode of feeding is seen in fishes.

  • There are herbivores, carnivores, parasites, filter feeders, and detritus feeders.

  • One fish may exhibit multiple forms of feeding.

  • Food goes down the esophagus and to the stomach where it is partially digested. In many fishes the food is further processed in pyloricceca.

  • Most fish exchange gases through their gills, located on either side of the pharynx.

  • Most fish have one gill opening on each side, but sharks and sea lampreys have multiple.

Circulation and excretion
Circulation and Excretion

  • Fishes have closed circulatory systems with a heart that pumps blood around the body in a single loop.

  • In most fishes the heart consists of four parts:

    • The sinus venosus – a thin-walled sack that collects blood from the fishes veins

    • Atrium – a large, muscular chamber that serves as a one-way compartment for blood

    • Ventricle – a thick-walled muscular chamber is the actual pumping portion of the heart

    • BulbusArteriosus – large, muscular tube

  • Fishes rid themselves of nitrogenous wastes in the form of ammonia

Response movement and reproduction
Response, Movement, and Reproduction

  • Fishes have a well developed nervous system organized around a brain.

  • Most fishes move by alternately contracting paired sets of muscles on either side of the backbone.

  • The eggs of fishes are fertilized externally or internally, depending on the species.