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The small fish Danionella cerebrum makes the loudest sound for its size of any fish, using muscles to tension a cartilage; this is released to strike the swim bladder. [10] Aquatic animals use mechanoreceptors to detect acoustic signals.
The species makes the loudest sound for its size of any fish, exceeding 140 decibels, using muscles to tension a cartilage; this is released to strike the swim bladder. The sound appears to be used for intraspecific communication, as the loudest few males effectively suppress the sound production of other males.
Bee venom and acetic acid injected into the lips resulted in fish rocking their bodies and rubbing their lips along the sides and floors of their tanks, which the researchers concluded were attempts to relieve pain, similar to what mammals would do. [34] [35] [36] Neurons fired in a pattern resembling human neuronal patterns. [36]
Functionally, this is a fast escape response, triggered most easily by a strong sound wave or pressure wave impinging on the lateral line organ of the fish. Mauthner cells are not the only identified neurons in fish—there are about 20 more types, including pairs of "Mauthner cell analogs" in each spinal segmental nucleus.
Fish physiology is the scientific study of how the component parts of fish function together in the living fish. [2] It can be contrasted with fish anatomy, which is the study of the form or morphology of fishes. In practice, fish anatomy and physiology complement each other, the former dealing with the structure of a fish, its organs or ...
Many popular aquarium fish such as goldfish and loaches have these structures. Members of the genus Botia such as clown loaches are known to make distinctive clicking sounds when they grind their pharyngeal teeth. Grunts (family Haemulidae) are so called because of the sound they make when they grind them. [2]
During these months, dipterans make up about 50 percent of the freshwater drum's diet. [24] In August through November, they tend to eat fish (which are primarily young-of-the-year Gizzard shad). The percentage of fish in their diet at this time ranges from 52 to 94 percent. [24] Other items in the drum's diet are mollusks and crayfish.
The sounds produced by male midshipman fish cause reproductive females to develop a hormone-mediated selective sensitivity to this sound, and they respond by laying eggs in the rock nest of a singing male. This selective sensitivity to higher frequency correlates to increased levels of testosterone and estradiol. [11]