Whale dolphin & fish detection
Hundreds of different types of whale dolphins & fish – both salt and fresh water varieties – along with many types of whale dolphin song by the recordings they produce. All fish with swim bladders make sounds either to attract mates or ward off threats, with the variable size of the fish producing a proportionately more powerful sound. Man-made, artificial sounds can also scare fish, thus the ability to understand the effects these sounds (of various types and acceptable levels) have on fish location assists in keeping fish stocks concentrated. You may wonder what dolphins eat, and can answer this question by detecting its prey through the same methods. The same concept also works when whales are ‘herding’ schools of fish together, through communication of hunting methods within their group. They are able to communicate, and so can efficiently circle their prey before a strike.
By recording fish sounds through the use of sonar from echolocation (the hydrophone transducers picks up the ping transmitted) beam patterns, and keeping location note with the date and time of year, this will aid fishermen or researchers to develop a practical record and map of fish locations and whale dolphin habits. At any given time of year, it would be possible to know the exact whereabouts of fish based on your own accumulated research.
Our natural human ability is to light and sight the world around us. If only our natural habitat was 20 feet under the ocean’s surface, or just a few inches below the earth, our ability to survive would have to depend on sound. Sound becomes the main provider of information and survival to creatures living within this situation. There is an undiscovered world of sound and communication that is out there, just waiting to be discovered. It could be listening to the ocean landscape like whale, dolphin, fish and boat sounds, or in natural or domestic adaptations. A hydrophone opens up a new world of sounds otherwise left mysterious and unknown to the human ear.
here’s some great work being done in British Columbia, listen and enjoy there awesome whale recordings and if you can, donate a Dollar or two!