The Bull shark Electroreception Almendra Esponda Isabella gomez

The Bull shark Electroreception Almendra Esponda & Isabella gomez

Introduction Defining Characteristics ● Bull sharks have developed special adaptations like how they keep salt water in there bodies even when there in freshwater ● Bull sharks get their name from there short, blunt snout ● They have a tendancy to head-butt there prey before attacking ● They are gray on top and white below, and the fins have dark tips, particularly on young bull sharks. ● They are medium- size sharks, with thick, stout bodies and long pectoral fins ● has two dorsal fins with a triangular shape, of which the second is visibly smaller but the tips of both are dark in young specimens.

CLASSIFICATION ● ● ● ● Common name : Bull Shark Scientific name: Carcharhi. Nus Leucas Kingdom: Animalia Phylum: Chordata Class : Chondrichthyes Diet: Carnivores Can live up to 16+ years

Fun Facts ● Males reach sexual maturity between 14 and 15 years, females only at about age 18. ● Female bull sharks are viviparous meaning they carry their shark pups and give live birth to them. ● The bull shark are known to be a part of the trinity of terror along the great white and the tiger shark. ● Bull sharks are classified as “Near Endangered” species in the IUCN Red List ● An adult bull shark can bite with a force up to 6, 000 N (1, 350 psi).

distribution The bull shark is commonly found worldwide in coastal areas of warm oceans, in rivers and lakes, and occasionally salt and freshwater streams if they are deep enough. It is found to a depth of 150 m (490 ft), but does not usually swim deeper than 30 m (98 ft). [15] In the Atlantic, it is found from Massachusetts to southern Brazil, and from Morocco to Angola. The bull shark prefers to live in shallow coastal waters less than 100 feet deep (30 m), but ranges from 3 -450 feet deep (1 -150 m). It commonly enters estuaries, bays, harbors, lagoons, and river mouths. It is one of very few species that readily move into freshwater, and apparently can spend long periods of time in such environments

examples Lemon Shark Tiger Shark Blue Shark

Electroreception ● Electroreception Bull Sharks are known to have a sixth sense called electroreception. ● Electroreception is the biological ability to perceive natural electrical stimuli ● Sharks are able to detect electrical currents as well as Any muscular movement or twitches in living animals and fish which then create small electrical currents ● The Location of sharks' electroreception lies around their snouts and lower jaws. ● The dots are open pores collectively called ampullae de Lorenzini. Filled with an electrically conductive jelly, the bottoms of the ampullae are lined with hairlike cells called cilia. Electrical currents travel through the jelly to the cilia.

Bull sharks and Humans BULL SHARKS AND HUMANS ● Bull sharks are fished widely for their meat, hides, and oils, and their numbers are likely shrinking. One study has found that their average lengths have declined significantly over the past few decades ● Bull Sharks are not mainly targeted but they tend to get caught in the multiple set fisheries. ● Bull Sharks are also very aggressive and dangerous to humans because they tend to be close in distance to humans due to then being able to live in both salt and freshwater.

Video video https: //www. youtube. com/watch? v=752 unba. FZCQ

QUESTION How powerful are Bull shark jaws? a) b) c) d) ver 18, 000 N (4, 000 psi) of force up to 6, 000 N (1, 350 psi) force of about 108, 000 N (24, 000 psi) Force about PSI: 7700

Short Response Why are BULL SHARKS in nearly endangered species List ?

citation ● http: //marinebio. org/species. asp? id=83 ● https: //www. labmate-online. com/news-and-views/5/breaking-news/what-iselectroreception-and-how-do-sharks-use-it-to-hunt/39409 ● http: //www. sharksavers. org/en/education/biology/the-sixth-and-seventh-sense/ ● https: //www. iucnredlist. org/species/39372/10187195 ● https: //animaldiversity. org/accounts/Carcharhinus_leucas/