Hydroacoustic surveys of fish distribution in relation to environment
Дата
Авторы
Orłowski,A.
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Издатель
Pensoft Publishers
Аннотация
Описание
Acoustic data collected during routine surveys can be used to improve our knowledge of marine ecosystems. Some new ideas of presentation and processing of acoustic, environmental and biological measurements are presented. In the method proposed, called macrosounding, the vertical distribution of fish biomass is generated by computer according to a scale selected on the basis of spatial and temporal correlation of the phenomena observed. The picture can be enriched by other factors, such as isotherms or isohalines, with the use of a multidimensional matrix of environmental, biological and acoustic data from the surveyed area. Practical application of the presented method is exemplified by results of surveys on distribution of fish in relation to environmental conditions in the Polish fishery zone. Distributions for the spring 1983 and 1985 and for the summer 1983, 1987, 1988 are presented and discussed.