Studies on the biomass in the Deep Scattering Layer of the Indian EEZ

Menon, N G and Prabha Devi, L (1990) Studies on the biomass in the Deep Scattering Layer of the Indian EEZ. In: Proceedings of the first workshop on scientific results of FORV Sagar Sampada, 5-7 June 1989, Kochi.

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Abstract

The bioacoustic scattering layer of the EEZ of India is found in depths between 200 - 540 m. An additional layer is also recorded at a depth of 20-100 m in some regions. The DSL shows characteristic vertical migration, ascending to surface or epipelagic realm after dusk and descending down to a depth of 2W54Om during day. This study on the biomass of the DSL is based on samples of 364 horizontal hauls by IKMT from the appropriate layers of the DSL during day and night collected by FORV Sagar Sampada in her cruises 1 - 15 covering both the coasts of India. The estimated biomass in the DSL of the surveyed area vary from 0.1 ml to 38.1 m1/100~with the highest abundance recorded from the region 7" - 10°3(YN and 70" -n030'E. Average monthly biomass varies from 2.1 to 21.0 m1/1000 m3 during day and 2.2 to 14.7m1/1000m3at night, with peak values noticed during April and December.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:biomass; Deep Scattering Layer; Indian EEZ
Subjects:Oceanography > Acoustics
Invertebrata
Divisions:CMFRI-Cochin > Marine Capture > Pelagic Fisheries
ID Code:5184
Deposited By:INVALID USER
Deposited On:14 Oct 2010 13:50
Last Modified:14 Oct 2010 13:50

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