I have compiled information that has been extracted from watching TV documentaries about sharks attacks. However, I have also included my own theory about the sharks’ nervous system and correlation to their increasing aggressive behaviour towards humans.
There are many contributing factors to this phenomenon, but the main triggering factor leading to sharks’ aggression is the change their nervous system, a dramatic effect of which has altered their behaviour and their feeding patterns.
In the last several decades global warming has elevated the oceans’ waters by several degrees, causing heightened activities in all oceans around the globe.
The negative consequences of global warming, as widely known, do not only effect humans, but also invariably effect the oceans, the lands, animals, plants, and all organisms.
Over fishing for humans and animals’ consumption, has left less fish in the oceans, to continually and sufficiently sustain the ever growing number of sharks and other aquatic organisms.
Human-made toxic pollution in the oceans is an additional cause for the change in the large fish’s behaviour. It is destructive to the sharks and to all organisms living in the oceans.
Pollution has harmful negative effect on aquatic organisms, physically and also mentally, thereby altering their behaviour, and neural responses. Consequence of which renders the also sharks to be more irritable, aggressive, irrational and unpredictable.
There are many contributing factors for sharks’ unpredictable behaviour leading to vicious attacks on humans. Below is a theory of mine describing some of the additional factors:
As population is growing exponentially, so is the number of people visiting the beaches around the globe. Beaches have become extremely overcrowded.
We already know that sharks have the ability to detect humans presence from kilometers away, through their sense of smell, acute sense of hearing, and their super sensitivity to electromagnetic fields’ energy. Sharks aggressive drive in search for food, coupled with the ability to detect minimal electromagnetic fields from a long distance, further increases the chances of their interactions with humans.
1. When you have a massive number of people visit the beaches, collectively they emanate relatively strong electromagnetic field that can be easy for sharks to detect. Sharks sensing this energy field, will therefore swim towards it, to defend their perceived territory, and in search for food. The more sharks interact with humans, and taste their flesh, the higher is the likelihood that they get used to tasting human flesh over time, and they may develop an appetite for it.
2. Warm ocean waters contribute to increased metabolism in sharks and other fish living in the oceans. Increased metabolism causes all fish to be more active resulting in constant hunger and constant search for food to replenish lost calories.
Higher temperature is a catalyst to increased of chemical reactions.The higher the temperature of water, the faster the molecules move, resulting in higher rate of chemical reactions taking place in the water, as well as in the aquatic organisms. As sharks get hungrier, they get more aggressive, as well as more experimental in their search for food.
They also dare to swim in shallow waters closer to shorelines, consequence of which increases the chance of shark/human interactions, due to mistaken identity during their search for food. Sharks perceive the oceans including the shorelines, to be their territory, and increased human activities to them, signal an invasion. They therefore feel the need to viciously defend their territory.
3. Elevated temperature typically decreases the level of dissolved oxygen of water, that effects water quality, and is harmful to aquatic life. Low oxygen levels effect a number of systems in the fishes’ body, as well as in their brain function, consequently altering their behaviour.
4. Strong tidal flow in the oceans and elevated temperatures of water, underwater basins, and of air, are both major triggering factors that cause sharks to become restless, more aggressive, anxious, and endlessly venturing to seek new feeding territories.
To sum it up, all of the above factors have marked influence on the sharks’ nervous system. The cool calculating shark that we used to learn about, has become in the recent decades, one that is increasingly restless, more anxious, and will grab and attack anything that may further stimulates its nervous system.
Strong tidal flow causes the oceans’ water to be in faster motion and less calm. Strong currents travelling in different directions can be disturbing and confusing to all fishes, particularly to the large ones. Analogues to a person taking a bath in order to relax, when suddenly the water get stirred up in fast motion, causing currents that produce friction and restlessness to the body, instead of bringing on the intended feeling of calmness.
It is obvious that sharks cannot reconcile with humans. Therefore humans must use more common sense and try and stay away from ocean waters, especially under specific circumstances that attract sharks to get closer to shorelines. Humans will have to resort to lakes, and/or other bodies of water, in order to enjoy swimming and other water activities, if they wish to avoid injuries and fatalities.
Copyright © 2015 S. Ber. All rights reserved.