Акустическая активность некоторых видов дальневосточных рыб и обоснование параметров акустических стимулов для дистанционного воздействия на рыб

• Main Author: Kuznetsov, M.
• Format: Text
• Language: unknown
• Published: Федеральное государственное унитарное предприятие «Тихоокеанский научно-исследовательский рыбохозяйственный центр» 2007
• Subjects: Keta; Pacific; Pink salmon
• Online Access: http://cyberleninka.ru/article/n/akusticheskaya-aktivnost-nekotoryh-vidov-dalnevostochnyh-ryb-i-obosnovanie-parametrov-akusticheskih-stimulov-dlya-distantsionnogo; http://cyberleninka.ru/article_covers/3551815.png

Acoustic behaviour of schooling physostomous fishes: chum salmon Oncorhynchus keta, pink salmon Oncorhynchus gorbusсha, pacific herring Clupea pallasii, and japanese sardine Sardinops sagax melanosticta is studied on experimental data. All these species have high acoustic activity with daily cycle. Salmons (Salmonidae) make the maximum quantity of sounds in the morning and evening, but herring and sardine (Clupeidae) have the maximal acoustic activity at night. Intensification of acoustic communication between individuals in school in dark time is supposed because of difficult visual contacts. Spectral composition of signals, time structure and power characteristics of the sounds emitted by fishes are determined. The table of physical parameters of the sounds is presented. Dynamic spectra of the sounds are concentrated mainly in two frequency subranges, different for each species: 100200 Hz and 450700 Hz (98 ± 4 dB re 20 µPa at 1 m) for chum salmon; 250350 Hz and 600900 Hz (92 ± 2 dB) for pink salmon; 350500 Hz and 8001200 Hz (82 ± 2 dB) for pacific herring; and 400550 Hz and 10001400 Hz (78 ± 3 dB) for japanese sardine. Spectral energy distribution and level of the signals depend on size of the species. Direct action of a swimming bubble in the process of sound producing is shown. Mechanism of sound producing for physostomous fishes with joint acting of the muscular sphincter and swimming bubble is considered. Ecological (alarm) significance of the sounds is analyzed. Parameters of acoustic stimulus perspective for remote forcing on fish behaviour in purposes of fishery are estimated.