Noise on animals
How do animals communicate with one another?
One of the main ways is sound. Loud noises intervene in an
animals communcation pattern. Noise results in many problems
for animals. Some examples are:
of fear, animals may not be able to graze, as the loud
noises scare them. This may result in a population decrease.
cannot hear predators preparing to launch and attack them.
may affect mating routines for animals.
Sources of Marine noise
Humans conduct many experiments in the oceans and marine noise is generated by all these activities. They can can occur due to use of air- guns, sonars which are used for identifying rocks, in defense and location of objects in the ocean, oil exploration and production. There several other factors which add to marine noise as ship movements, mineral extraction, military exercises.
NOISE AND MARINE MAMMALS
Marine mammals and land mammals have similar inner ears though the external ears are absent and the middle ear modified. Many forms of hearing loss occur due to disturbances in the inner ear. Hence one can conclude that hearing damage occurs in marine mammals the same way as land mammals.
Whales and dolphins, have strong inner ears which may have evolved to resist the strong noise in oceans.