White
Shark Attack
The Spielberg movie 'Jaws' gavethe white
shark's reputation wrong 'man-eater' but the statistics reported more
incidents of shark species with the famous Toro Carcharodon carcharias. Other
species smaller in size have a much more aggressive
behavior for mankind. Among these the most outstanding are: tiger shark
(Galeocerdo cuvieri), shortfin mako (Isurus oxyrynchus) and lemon shark
(Negaprion brevirostris).
More than half the attacks reported recently (data ISAF) for white sharks
occurred in the Pacific Coast of U.S. Only the state of California
reported 40% of annual attacks followed by Australia
with 32%, 10% South Africa
and New Zealand
to five. United States
as a whole has 55% of all white shark attacks.
The first recorded attack time of the year 1876 in Victoria, Australia.
The number of attacks has grown dramatically over time and at an alarming rate
from the 60's but experts blame the fact that historically never was a global
record of attacks until the sixties.
My personal theory is that in addition to the last point, there has been a
notable increase in human water activities and therefore increasing the risk of
an encounter which becomes an attack.
The wounds created by white shark attacks are usually always severe, prior to
1950 to 90% of attacks had fatal consequences (symptoms clear that only
properly registered deaths or attacks resulting in large wounds). Between 1950
and today that number has changed and only 26% of attacks are fatal.
I understandthat this 'only' may be somewhat traumatic, but I urge
readers to think is the probability of standing in front of a locomotive
running at full speed and survive and tell me if someone believes it is
probable. And that's what an adult Carcharias Carcharadon a locomotive at sea.
As the average time that the attacks are carried out, we can say that these are
almost exclusively during daylight hours, particularly in a time range between
fourteen and sixteen hours. In fact, two thirds of the attacks in a population
of one hundred twenty-four attacks around the world have registered from 10.00
AM to 16.00 PM.
The relationship between white shark attacks and the
water temperature is subjective. There have been attacks (one in New Zealand)
with a water temperature of eight degrees Celsius to temperatures of around
twenty-five degrees Celsius.
Las fosas nasales de un cocodrílido y sus ojos se encuentran en la parte
superior de la cabeza, lo que le permite ver y respirar mientras permanece en el
agua. Puede respirar parcialmente sumergido, cerrando un pliegue de la garganta
que evita que el agua penetre en los pulmones. Bajo el agua, las fosas nasales
y los oídos se cierran, y en sus ojos una membrana transparente se mueve en
sentido transversal actuando como
un tercer párpado.
Fisiología
La fecundación es interna. Son ovíparos; es decir, ponen huevos, en nidos que
construyen con palos y ramas. Mas ésta es solo la parte superior. Los huevos en
cuestión están enterrados. A veces, las tortugas aprovechan los nidos de los
cocodrilos, que protegen su nido e incuban sus huevos.
Poseen además un corazón formado por cuatro cavidades (dos aurículas y dos
ventrículos). Son poiquilotermos y ectotermos; es decir, que su temperatura
corporal varía con la ambiental.
Respiran mediante los pulmones. Son los animales de respiraciónpulmonar que más
tiempo pueden aguantar bajo el agua; sus pulmones son tan grandes que puede
llegar a estar seis horas bajo el agua si está en continuo movimiento; si se
mantiene quieto, es decir, consumiendo la cantidad mínima de oxígeno por
minuto, es capaz de permanecer dos días seguidos bajo el agua. El abdomen y el
tórax están separados por un diafragma muscular que también es usado en la
respiración.
The Crocodile (Crocodile) is a family of sauropsids (reptiles), commonly known
as archosaurs, crocodiles. Includes 14 species [1] current large semiaquatic
reptiles. The term 'crocodile' is also used incorrectly to refer to
all members of the order Crocodylia, which includes all crocodiles, alligators
and caimans (family Alligatoridae) and the Gharial (family Gavialidae).
Ecology
Their skin is scaly, hard and dry. Come to live for 100-150 years. [Citation
needed]
They are reptiles that live in tropical areas of Africa, Asia, America and Australia. They are excellent
swimmers. Tend to live in slow flowing rivers and feed on a wide variety of
animals, preferably alive.
One species, the estuarine crocodile (Crocodylus porosus) is the largest of the
crocodiles of today (the largest that has been reported is 8.5 meters long and
weighing 1,700 kilos and was caught in Queensland (Australia ) in the year
1957), [2] [3] [4] live in both freshwater and salty estuaries and often delves
into the sea, which has allowed him to settle many islands inAustralia and all
costs from India to Australia, and even, on many occasions come across the
Indian Ocean and reaches East Africa, from Somalia to Madagascar and South
Africa. The estuarine crocodile is not the only venture into the sea, although
that does it more often. Thus, the Nile crocodile (Crocodylus nyloticus) has
crossed the sea to colonize several Indian Ocean islands (including Madagascar) and the American crocodile
(Crocodylus acutus) has come to swim to most Caribbean islands, and even to the
southern tip of Florida.
The young crocodiles feed on crabs, insects and frogs. The hunt larger fish
feed on dead animals or remain on hold for hours, ready to swallow prey such as
mammals and waterfowl. Cling to the prey with powerful jaws and sharp teeth,
dragging it underwater to drown. Crocodiles can not chew, so they cut the dam,
shaking and pieces with his teeth. Grow new teeth to replace those that are
broken or lost. Their bite is the most powerful of all the Animal Kingdom, some
1,800 kilos of force. [Citation needed]
Crocodiles are very inactive lives because they lie motionless most of the day.
In the morning the rivers are heated slowly and crocodiles often seek the
warmth of the sun on the riverbank. At night the water cools slowly, so that
the crocodiles spend these hours in the river to keep warm. To open their mouth
helps to warm or cool morning at noon in the mouth the blood vessels near the
surface of the skin, allowing heat topass quickly to or from the blood into the
environment.
Inglaterra.Los Crocodylus acutus crocodiles have heavy bodies and slow
metabolisms generally, although they can control the speed of digestion as prey
abundance and ambient temperature, so, with an optimum temperature (40-50 ° C)
can make a digestion if abundant prey quick or slow if they are scarce (the
latter data were recently scientifically proven.) They are well adapted to
aquatic life and only occasionally out of it, as the Ganges Gharial (Gavialis
gangeticus). On land, crocodiles glide by dragging your stomach and pushing
wi
Yes we can say that two thirds of the attacks are in water temperatures below
twenty degrees, shattering the fact that only white shark attacks in warm
waters. As the depth to 90% of them are between the surface and three meters
deep. The attack in depth record was recorded in Japan in 1992 to twenty-five
meters.