Abstract
The codfish family, Gadidae, contains many vocal species. The sounds produced are species-characteristic and relatively simple. Unusually within this family, the haddock Melanogrammus aeglefinus, produces a range of sounds in different contexts. Both male and female haddock produce short sequences of repeated ‘knocks’ during agonistic encounters. During the spawning season, however, male fish produce sounds which vary in their characteristics as courtship proceeds. The repertoire of the male fish consists of a graded series of sounds ranging from a short series of slowly repeated ‘knocks’ to long sounds of rapidly repeated ‘knocks’. The fastest sounds are heard as a continuous humming. Different behavioural acts leading up to the mating embrace are associated with particular sounds, the sounds becoming longer and faster as the level of arousal of the male increases. It is suggested that the sounds serve to bring male and female fish together in the same part of the ocean, and that the sounds also play a role in synchronising the reproductive behaviour of the male and female.
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Hawkins, A.D., Amorim, M.C.P. Spawning Sounds of the Male Haddock, Melanogrammus aeglefinus . Environmental Biology of Fishes 59, 29–41 (2000). https://doi.org/10.1023/A:1007615517287
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DOI: https://doi.org/10.1023/A:1007615517287