Underwater behavious of the Hawaiian Spinner Dolphin and the Atlantic spotted Dolphin

• Autorzy: Błaszak M.
• Języki publikacji: EN

Abstrakty

EN

To understand the behaviour of dolphins a specific language of these animals must be decoded. Dolphins acoustic emissions can be classified into two general categories: tonal whistles and pulsed sounds or clicks. Spinner whistles are frequency-modulated sounds with a fundamental component usually below 20 [kHz], while the echolocation signals have bi-modal frequency spectra with a low-frequency peak between 40 and 50 [kHz] and a high frequency peak between 110 and 130 [kHz]. Because of the fact that the signal of 100 kc/sec is much stronger absorbed by water than that of 20 kc/sec, at some longer distances higher harmonics are not audible for dolphins. Therefore, these harmonics probably do not play a significant role in long distance conversation. Another great problem is the noise produced by human activity that can impede the communication between dolphins or even prevent echolocation.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2004
• Tom: Vol. 7
• Strony: 7--16
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Błaszak M.

• Adam Mickiewicz University,

Bibliografia

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