Acoustic observations of jellyfish distribution in Malo Lake (Mljet Is., Croatia).

BENOVIC, A.; ACHA E.M.; MALEJ A.; ALVAREZ COLOMBO G.; BACE Z.; MIANZAN H. W.

Annales, Series Historia Naturalis

Scientific and Research Center of the Republic of Slovenia

Lugar: Koper, Eslovenia; Año: 2009 vol. 19 p. 65 - 72

1408-533x

An acoustic survey covering Malo Lake (Mljet Is., Croatia) was performed to obtain a synoptic picture of the distribution of acoustically detectable jellyfish and other biota at 120 kHz. Acoustic records from 24 parallel transects were associated with fish schools and with the scyphomedusa Aurelia sp. for which vertical and horizontal distributions were documented. Echointegration and in situ acoustic target strength measurements were employed to estimate medusae abundance, accounting for approximately 500,000 individuals for Malo Lake.