imagen de surfista pasando en gran ola con tiburon blanco de fondo

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White Shark Adventures

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Social Behavior of the great white shark

Some of the white's swimming modes, such as a cautiously timed turn away between two animals on reciprocal approaching courses, are interpreted as ensuring avoidance of conspecifics and maintenance of individual space. A parallel swim mode, whereby two sharks heading in the same direction at an unfluctuating distance from each other, also seems to be a result of the shark preserving its space from others. When two white sharks attempt to feed on the same prey, it is disadvantageous for one to discourage the other from further feeding by biting it and inflicting a wound. Such an injury might reduce either shark's future ability to catch prey. For this reason, scientists believe that white sharks sometimes use displays in order to discourage other sharks. White sharks have been observed with their caudal fin out of the water and slapping the surface, propelling water usually in the direction of a second shark. The recipient shark probably perceives the sign with its vision, lateral line (related with mechanical stimulation), and sense of hearing. This behavior is called a "tail slap" and is the most common avoidance display shown by white sharks. These sharks also present other types of displays. White sharks have been observed rolling on their sides and directing exaggerated tail beats in one direction, a phenomenon know as "tilting behavior". Sometimes a white shark will position itself between prey and another shark, preventing the second shark from feeding. White sharks have also been known to propel two-thirds of their body out of the water and land flat against the surface, causing a large splash. This behavior is called a "pattern breach" and may represent a similar, but more intense sign than the tail slap. This specific behavior might also be used to help remove external parasites, attract a mate during courtship or may be the result of a vertical charge approach pattern toward a prey item. 

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Food Habits of the white sharks

In most areas where white sharks occur, pinnipeds such as these California sea lions (Zalophus californianus), make up the bulk of the white shark's diet 
© D. A. Sutton, Amer. Soc. Mammalogists Library

The white shark is a macropredator, known to be active during the daytime. Its most important prey items are marine mammals (including, seals, sea lions, elephant seals, dolphins) and fishes (including other sharks and rays). Marine reptiles are sporadically ingested, mostly sea turtles. Marine birds and sea otters are almost exclusively rejected as prey. These animals are commonly found having suffered injuries from encounters with white sharks, but are rarely ingested.Predatory behavior is usually divided into five stages; detection, identification, approach, subjugation, and consumption. However, these stages, especially the first and second, are poorly understood in white sharks. The patterns of prey detection and identification in white sharks have been investigated by the use of experimental targets, baits, and other objects in which they are "offered" to the sharks. The results of these experiments reveal that when white sharks have a choice between a square target and a fusiform, seal-shaped target, they select the shape that is more common in their natural environment. Indeed, the choice made in nature is usually whether to respond to a single potential prey item rather than choosing between two of them. When only a single object was presented, it was invariably investigated. Some scientists believe diver and surfer silhouettes, when viewed from below, resemble those of pinnipeds and that this misidentification on behalf of the shark is the cause of most white shark attacks on humans. However, the fact that white sharks attack inanimate objects of a variety of shapes, colors and sizes, none of which resemble those of a marine mammal, refute the well-known hypothesis of "mistaken identity". Researchers suggest that white sharks often strike unfamiliar objects to determine their potential as food. In this case, it would seem that grasping an unfamiliar object would be the shark's only reliable method of determining palatability.
Based on underwater observations, scientists described some approach patterns. Most sharks used an "underwater approach" in which the shark swam just below the surface until it was approximately 1 m (3.3 ft) from its intended prey and then attacked by deflecting the head upward and emerging out of the water. The white shark also presented a "surface-charge" which consisted of a rapid rush with the body partially above the surface. In rare cases, whites performed an "inverted approach" in which they swam with the ventral side up. Although the majority of approaches are horizontally oriented, vertical approaches are nonetheless common. White sharks readily engage in vertical swimming during feeding activities, sometimes swimming perpendicular to the surface in direct and rapid pursuit of floating objects. There are benefits of using the vertical approach to capture prey positioned near the surface. Firstly, a predator attacking from below is more difficult for the prey to see, while at the same time, the shark has a better view of its prey positioned overhead. In addition, fleeing (rapid movement away from an approaching predator) is probably the most common escape tactic used by animals under attack. Considering these situations, extended escape in the direction opposite the vertically approaching shark is virtually impossible. The propensity for vertical swimming was observed in small white sharks approximately 220 cm (86 in) in length. Scientists believe that the development of this behavior precedes physical changes, such as broadening of the teeth, believed to be adaptations for feeding on large marine mammals.
Few hypotheses about the consumption patterns of white sharks have been made based on observations under natural conditions.

White shark scavenging a dead humpback whale 
©Tobey Curtis

One of these hypotheses, the "bite, spit and wait" theory, is composed of three elements. Initially, the white shark seizes its prey and releases it intact; secondly, the shark waits until the prey lapses into a state of shock or bleeds to death; finally, the white shark returns to feed on the dead or dying animal. However, recent studies do not support this hypothesis. Scientists believe that these sharks may not release potential prey to permit them to die but, rather, let them go in response to their defensive behavior or unsuitability as food. Some evidence suggests that white sharks decide a prey's palatability while it is lodged in the shark's mouth. Researchers also believe that white sharks may prefer animals rich in energy, such as marine mammals, in favor of less fatty, energy-poor prey. This is supported by some observations of aggregations of white sharks selectively feeding on the blubber but not the muscle layers of mysticete whales. This behavior seems based upon a size-hierarchy, where large sharks dominate in the feeding.
A behavior pattern described as "repetitive aerial gaping" was observed in white sharks of southern Australia. The sharks were seen with their heads out of the water, mouths at or above the surface, rolling onto their side and opening and closing their mouth in a moderately slow, rhythmic, partial gape while swimming slowly along the surface. The most notable difference between this behavior and normal surface feeding is that the repetitive aerial gaping is not oriented toward food or possible targets. White sharks also scavenge from fishermen's nets and longlines and take all manners of hooked fish. This propensity often results in their own accidental entrapment. 

Spatial Behavior of the white shark,

Although information about its movements is limited by the rarity of the white shark, some data has been gathered through tag-and-release programs in the United States, South Africa and Australia. These studies reveal that the white shark is capable of making movements on localized, regional and intercontinental scales. Generally, larger individuals undertake long journeys across the great ocean basins. Observations of two white sharks cruising in open water, apparently not feeding, revealed a strong tendency to ascend and descend slowly and steadily. The white shark is also capable of short, high-speed pursuits and even launching itself clear from the surface. Patterns in movement and abundance within some areas appear to be linked with seasonal variations in surface temperature. However, this may only have a minimal effect on the distribution of the white shark. 

Delfines que salvan surfistas de ataques de tiburon blanco

Size, Age and Growth The maximum size attained by white sharks

The maximum size attained by white sharks has been the target of many debates and spurious information. Scientists now suggest that the maximum total length of this species is about 680 cm (22.3 ft). Males mature at about 350 cm (10.5 ft) and females at about 450 cm (14 ft). White sharks are 120-150 cm (47-59 in) in length at birth. Studies have indicated that white sharks live at least 14 years. However, in reality, this number is likely much higher. Growth rates of the white shark are also largely unclear, although one recent study included a tagged specimen that had grown 69 cm (27 in) in a period of 2.6 yrs. 

how many teeth have the white shark?

Superhombre. El australiano Trevor Burns, de 50 años (izquierda), fue condecorado en su país por enfrentarse a un gran tiburón

Superhombre. El australiano Trevor Burns, de 50 años (izquierda), fue condecorado en su país por enfrentarse a un gran tiburón 

PERTH, 25 de marzo.- Un australiano recibió el lunes un premio a la valentía por aferrar a un gran tiburón blanco de 3.7 metros por la cola mientras el animal atacaba a una muchacha que estaba buceando.

Trevor Burns, de 50 años, fue galardonado con la Estrella del Valor por actos de valentía en circunstancias de gran peligro al forcejear con el tiburón y rescatar a la víctima, Elyse Frankcom, de 19 años, en las costas frente al pueblo de Rockingham en 2010. El único premio australiano al valor civil más destacado es la Cruz del Valor.

Frankcom era una guía que mostraba delfines a una docena de turistas que estaban buceando, incluso Burns, cuando el tiburón le clavó los dientes en los muslos.

the Great White. Each tooth has super fine serrations on each side of the tooth.

Now let's take a look at the individual tooth of the Great White. Each tooth has super fine serrations on each side of the tooth. Being the amazing creature this shark is, the upper and lower jaws always seem to know where their opposite replacements are going to come in. This way, they don't have a problem meshing with each other as they shark bites down. Each tooth "interlocks" with it's corresponding tooth on the other side of the jaw. And the clearances between the teeth are such that whenever the shark chomps down there is very little room for anything but teeth. Whatever is in between is literally sheared away.  In fact you could say the teeth work very much like a pair of scissors. Except for the fact that they are traveling in opposite directions when they meet. And when you factor in the fact that once the shark bites down it begins to shake violently back and forth, one can see how devastating and powerful such a chomp can be.

                                                              

Sharks continually lose their teeth over time and the developing teeth will then rotate in and replace them.

 This rate of tooth loss most probably has to do with what the sharks are chomping on, so its pretty difficult to define exactly.  But for the sake of blogging, how would one go about conducting a study to answer this rate of tooth loss conundrum?  I could grow my own white shark jaws in a lab, apply the known white shark bite forces to various prey items to see how many teeth fall out each time, then apply that to the general diets of various shark populations world wide!  But alas, not terribly feasible however awesome that may be.  So an actual rate of tooth loss is a bugger.  But since this is a blog, I’ll just make up an answer of 19 teeth a week.  Why 19?  Because its the jersey number of the greatest hockey player of all time.  Plus, we also know a shark can eat at least 6 seals in a sitting, and they probably lose a few teeth per seal (check out the image at the bottom!)

OK, but what about our other factor – average lifespan of a white shark.  I am afraid we don’t have a real grasp on this number either!  My next shark fact blog will go into this in greater detail, but it's generally accepted that white sharks live longer than 30 years... which isn’t terribly helpful for our question.  Considering that an orange roughy was aged at 149 years and this lungfish is at least 80 yearsold, we actually know very little about fish life histories!  But again, for the sake of blogging, lets say we have a 30 year old shark.  

So 19 teeth a week = 988 teeth a year x 30 years = 29,640 teeth per year.  Let's add (48 teeth x 5 rows of development) = 240 currrent teeth.  240 + 29640 = 29880 teeth during a white shark's lifetime!

video ataque de tiburon blanco intrudiciendo cabeza dentro de jaula de buzos

Una enorme bestia marina intentó devorar a un recién casado, Roger, y a su pareja. Roger quedó a centímetros de los colmillos del tiburón blanco.

El jueves, un grupo decidió experimentar el shark diving, inmersiones para ver de cerca a los tiburones; consiste en meterse a una jaula especialmente diseñada para soportar el ataque del depredador marino.

Enlace al vídeo.

El escualo del vídeo pasó por alto el cebo y enfiló directamente hacia la jaula, metió la cabeza y empezó a abrir y cerrar la mandíbula.

Mientras el ataque ocurría, Bryan Plummer decidió grabar un clip, en el que se oyen los gritos de horror de los testigos.

Por suerte, Bryan y Roger lograron sumergirse a tiempo y evitar así convertirse en el almuerzo del señor Mandibulín. De la que se salvaron.

Tags: animales, naturaleza, Tiburón blanco

Afortunadamente, nadie resultó lesionado.

A los internautas que han visto el vídeo les parece 'muy divertido', y se ha vuelto viral, con más de 311,000 visitas al día de hoy. Enlace a otra de tiburones.(Daily Mail / The Sun)

A la derecha se ven las fauces del tiburón.

Tras el ataque, los buzos aficionados emergieron ilesos.

How many teeth does a white shark have in its lifetime?

  Seems like an easy question, but when you consider that we don’t even know where white shark give birth (which is far more important!), you begin to realise that there are no easy answers when sharks are concerned.  Let me take you through the physiology and the math, and show you how difficult this easy looking question actually is.

In order to tell you how many teeth a white shark has over its lifetime, we’ll need to do some sort of calculation like this one I’ve just made up (it is a blog afterall):

Rate of tooth loss X average life span of the shark = how many teeth over a lifetime.  

That's easy enough, but do you see the problem yet?  If not, read on...

We definitely know that white sharks have about 24 exposed teeth on their top and lower jaws, respectively.  That’s these:



But behind these 48ish teeth, there can be 5ish rows of developing teeth behind them, like this:

the Great White will lose it's teeth many times over during it's lifetime

Like all sharks, the Great White will lose it's teeth many times over during it's lifetime. Because most of the Great White's diet is not entirely boneless the shark needs to be able to replace it's teeth if they are dulled or broken on hard bones. Teeth are manufactured by the animal out of tiny calcified cartilage "blanks" developed and literally drawn out of the interior of the jaw. These "blanks" move up and outward from their origin deep in the jaw to finally replace lost teeth. They start out very small and the teeth actually gain calcium and "grow" as they get ready to replace each lost tooth. This cycle is never ending.

picture The ample teeth and jaw of a great white shark (Carcharodon carcharias).

Ian Waldie  /  Getty Images file

The ample teeth and jaw of a great white shark (Carcharodon carcharias).

un tiburon blanco se lia a bocados ocn un barco

YouTube /NewVideo King

Tres pescadores australianos se sintieron de repente protagonistas de la película 'Tiburón', cuando un escualo de cinco metros atacó su pequeño barco en aguas de la ciudad australiana de Portland.

Dentition white shark Teeth large, erect, triangular and serrated.

Teeth large, erect, triangular and serrated. More slender in lower jaw. In juveniles under 1.8 m (5.5 ft), the teeth have small lateral cusplets and in neonates, the lower teeth may actually lack marginal serration.

Right side upper and lower teeth of the white shark
ex RadCliffe (1916) Bull. Bur. Fish. Circ. 822

tiburon blanco cazando foca en el aire

video What a Catch Canadian Tourist Snags Large 18 Foot Great White Shark

Coloration white shark Dorsal surface blue-grey to grey-brown, often bronzy

 Coloration

Dorsal surface blue-grey to grey-brown, often bronzy. Ventral surface is white. Boundary between these tones is generally abrupt. Small, irregular dark spots may be present on the flanks posterior to the last gill slit. Most specimens exhibit a black oval blotch in the axil of the pectoral fin.

© George Burgess

tiburon blanco emergiendo en parte trasera de un yate estilo la escena de tiburon

ATAQUE DE TIBURON BLANCO A ZODIAC

Biology · Distinctive Features white shark

Body fusiform, snout conical and relatively short, long gill slits not encircling the head. Large first dorsal fin with the origin over pectoral fin inner margins. Second dorsal and anal fins minute. Caudal fin homocercal (crescent shaped), without a secondary keel below extension of caudal keel.

imagen frontal de la buceadora que pone la mano encima del dorso del gran tiburon blanco

white shark vs blonde woman

Meet the woman on a mission to dispel the myths about one of the world's most feared ocean predators - by swimming with great white sharks without protection. Shark conservationist Ocean Ramsey said: "It's difficult to express the incredible joy and breathtaking emotion experienced locking eyes with a great white shark. Watching the shark acknowledge and observe me, while I peacefully and calmly allowed it to swim towards me, and then experiencing it accepting my touch. The connection I felt as I repeatedly petted and hitched a ride on these sharks reminded me of my experience with horses. A lot can be said between two creatures that don't speak the same language."Picture: JUAN OLIPHANT / CATERS NEWS

gran tiburon blanco disecado en el museo natural de historia sobre los habitas de mundo submarino

Habitat The white shark is principally an epipelagic (living in the upper part of the water column)

Habitat

The white shark is principally an epipelagic (living in the upper part of the water column) dweller of neritic (nearshore) waters. However, it ranges from the surfline to well offshore and from the surface and to depths over 250 m (775 ft). This shark commonly patrols small coastal archipelagos inhabited by pinnipeds (seal, sea lions and walruses), offshore reefs, banks and shoals and rocky headlands where deepwater lies close to shore. The white shark usually cruises in a purposeful manner, either just off the bottom or near the surface, but spends very little time at midwater depths.

hombre acaricia ocico de cria joven de tiburon blanco

mordedura de tiburon blanco a una jaula imagen white shark bite einen Käfig image

el tiburon gran blanco llamado Mary Lee ha entrado en El Long Island, NY, costa - la ciudad ficticia de Amity para ser exactos

Mary Lee consigue alrededor.

El mes pasado, el gran tiburón blanco entró en la zona de rompientes en Jacksonville, Florida, causando un gran revuelo. Ahora, el tiburón de 16 pies, casi 3.500 libras ha entrado en aguas donde la leyenda se reúne la realidad.

El Long Island, NY, costa - la ciudad ficticia de Amity para ser exactos - sirvió como escenario de "Jaws", el libro que dio lugar a una exitosa película de 1975 sobre un blanco grande en una matanza. El miércoles, la región sirvió como el agujero de la piscina personal muy real María de Lee.

Ocearch, la migración del tiburón de investigación sin fines de lucro seguimiento Mary Lee con un dispositivo GPS, recibió un ping que estaba al acecho 20 millas de East Hampton. Funcionarios luego encontró su "40 a 45 millas náuticas de Montauk Point" por la tarde del miércoles, los informes de AOL Southampton Patch. Guardia Costera dijo Patrick Rogers Patch que Mary Lee fue el primer gran blanco que había encontrado en la zona.

Habida cuenta de que Mary Lee estaba demasiado lejos para ser una amenaza, puntos de venta se divirtieron con el avistamiento.

"Dah-dum. Dum-Dah", escribió en MSN sonar las dos primeras notas del "Tiburón", cuenta. Los International Business Times, recordando una famosa frase de la película de Steven Spielberg (adaptado a su situación de Martha Vineyard tiro), bromeó: "Espero que los nadadores no tendrá que preocuparse de conseguir" un barco más grande. ""

A mediados de enero, la presencia de Mary Lee provocó más urgencia. Ocearch presidente Chris Fischer, cuyo equipo había marcado Mary Lee frente a la costa de Cape Cod, en septiembre, llamó por teléfono local de Jacksonville, Florida, la policía cuando el tiburón emite una señal de que estaba a sólo 200 metros de la costa.

Su mensaje a las autoridades: Asegúrese de que la gente se queda a los demonios fuera del agua hasta que se vaya.

Ocearch espera que viaja María Lee le permitirá comprender mejor la biología del tiburón blanco y los patrones migratorios, mientras que la detención de los "importantes descensos en las poblaciones de tiburones", según su sitio web.

¿Quieres saber dónde Mary Lee es ahora? Echa un vistazo a la Mary Lee rastreador en la página de Facebook de Ocearch.

rihanna vs white shark picture

Steve Alten aguas primitivas y el tiburon blanco de 21 metros de largo

Fue el mayor depredador de todos los tiempos, la criatura más temible que jamás haya vivido; un Gran Tiburón Blanco de 21 metros de longitud y más de 30 toneladas de peso. Cientos de dientes serrados de dieciocho centímetros cubren unas mandíbulas que podrían engullir a un elefante entero. Puede sentir a su presa a kilómetros de distancia, inhalando su olor y registrando el latido de su corazón, y si alguna vez llegas a acercarte demasiado al monstruo… será demasiado tarde.

Han pasado dieciocho años desde que el Carcharon Megalodon se cruzara en el camino de Jonas Taylor por última vez. Ahora, en plena madurez y padre de dos hijos, se ve superado por una montaña de facturas y la lucha diaria de tener que criar a una familia. Pero su vida está a punto de sufrir un cambio. Un productor de televisión de Hollywood quiere que Jonas participe en unacnueva serie de supervivencia: Temerarios.

Durante seis semanas, dos equipos de temerarios lunáticos deberán competir delantecde las cámaras en un viaje por el Océano Pacífico Sur. Jonas necesita el dinero y el trabajo de comentarista parece sencillo. Pero, detrás de las cámaras, alguien mueve los hilos. Antes de que termine, Jonas tendrá que enfrentarse de nuevo cara a cara con la criatura más peligrosa que jamás haya acechado la Tierra.

STEVE ALTEN es natural de Filadelfia y se licenció en la Penn State University. Ha ampliado su currículum como exitoso autor del New York Times con sus obras MEG: A Novel of Deep terror y La Trilogía Maya, de la cual su primera entrega, El Testamento Maya , ha vendido más de 300.000 ejemplares en España.

desmembrando la boca de un tiburon blanco

Hombre salva la vida de la cria más pequeña de tiburon blanco jamas encontrada

 

clica aqui para ver fotos

fondo de tiburon blanco para iphone 5 wallpaper of white shark for iphone

Hungry Shark Evolution By Future Games of London

Experience life as a Shark in the ultimate test of survival. Jaw dropping 3D graphics and action packed gameplay. Grow from a pup into a 10 ton Great White Shark! Eat your way around a diverse aquatic world full of wonder and danger.

• Category: Games
• Size: 124 MB
• Updated at: Feb 16, 2013
• Version: 1.3.5
• Languages: English
• Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 4.3 or later. This app is optimized for iPhone 5.

• FREE
• 4.5 stars
• view in iTunes →

Hungry Shark Evolution by Future Games of London is a fantastic app where you’ll play a shark instead of the person.
In this survival game, you’ll start out playing as a pup and grow into a gigantic shark. Enjoy the amazing 3D graphics as you devour everything in sight in this underwater world.
For those yet to experience a Hungry Shark game, the idea behind Hungry Shark Evolution is simple: swim around the ocean while eating up smaller fish and unfortunate scuba divers, while dodging mines and fighting the dangers of starvation. Sharks need plenty to eat at all times so the player must keep the shark fed regularly. You’ll eat turtles, seat creatures, unlucky fisherman, and swimmers as you continue to grow and need more food. You’ll have to fight off subs, other sharks, and strange and wonderful creatures of the depths.
The sole purpose behind Hungry Shark Evolution is to evolve. 5 shark species are available in all, with players able to either buy their way into an upgrade or grind their way to the top, eventually unlocking some rather huge shark breeds. Upgrades mean a faster, bigger or more powerful shark which, understandably, makes the game rather more interesting than the weakling starter shark. It’s this trickling effect of bonuses that keep players playing for far longer than one would expect of such a basic concept.
I really enjoyed this game, as much as I am terrified of sharks. I would never play if I had to play the swimmers but playing from the perspective of the shark was really fun. The only improvement I would make is the load time.