we have turned the ocean into an acoustic hell

The ocean is no longer the silent paradise it used to be, as beneath the surface a constant cacophony of engines, propellers and giant ship hulls has created an “acoustic fog” that is suffocating marine life. and this It is creating a very serious problemespecially with the whales that are trying to raise their voices to be heard over the noise of the ships, but physically they can no longer scream.

We have it close. To understand the magnitude of the problem, one does not have to go far, since in the Strait of Gibraltar itselfone of the busiest maritime highways on the planet, cetaceans are living on the edge. And here science is seeing that the pilot whales of the strait are “screaming” to communicate with their groups.

However, the effort is in vain, since the data reveals that, no matter how much these whales try to raise their vocalizations, they barely manage to reach half the noise level generated by maritime traffic continuous. Simply put, the noise of merchant ships and ferries silences them and does not cut their communication links with others of their species.

Why not stronger? It would be the most logical question that could come to mind, but the reality is that science points to the existence of an unbreakable physiological limit in their larynxes that makes it impossible for them to raise their ‘voice’ any higher.

It must be taken into account that the vocal anatomy of these whales is perfectly adapted for the depths, but becomes ineffective to compete with the frequencies and volume of merchant ships that travel on the surface. In fact, below 100 meters of depth, their ability to compensate for environmental noise hits a biological wall, since maritime noise is masked in such a way that their vocalizations are completely disrupted.

The danger of your instinct. Added to this physical limit is a behavioral problem, since evolution has prepared whales to deal with the natural noise of the ocean, but human noise is completely foreign to them.

Studies here showed that while these animals know how to react to natural threats by adjusting their singing patterns, they do not have the instinct necessary to evade anthropogenic noise. They simply don’t process the sound of a freighter as a threat they must flee from or adapt to until it’s too late and the end is quite catastrophic.

Its impact. It is not limited to the fact that they cannot “talk” to each other, but this sound masking forces the animals to abandon rich feeding areas for more impoverished but quiet areas. Furthermore, since males and females cannot communicate from kilometers away, the rates of encounters to reproduce fall.

In the end, we are facing a problem that is serious, which has led institutions such as the Ministry for the Ecological Transition to monitor these hot spots of noise in the Mediterranean that are altering the behavior of fauna. And all because the whales here cannot adapt to the rhythm of our noise, so the solution is to make our boats ‘quiet’ so that they do not have a great impact on the fauna.

Images | rawpixel.com on Magnific

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