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Preliminary investigation on the fish biomass in the Deep Scattering Layers of the EEZ of India

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Title Preliminary investigation on the fish biomass in the Deep Scattering Layers of the EEZ of India
 
Creator Menon, N G
 
Subject Fisheries Resources Assessment
 
Description The Fishery and Oceanography Research Vessel Sagar Sampada during her cruises 1-15 along the EEZ of India during 1985
to'86 conducted surveys of the bio-composition of the DSL by using a 5 m lsaacs Kidd Midwatcr Trawl. The survey revealed
that the DSL is either single layered or some times multilayered mostly occupying depths from 200 to 540 m and 20 to 100
m. These layers were found to shift vertically from depths of 200- 540 m during day to the surface during night, influenced
by photoperiodic conditions. Out of a total of 563 stations surveyed, the lKMT gear sampled from 364 stations, which
included day and night hauls. In additon to planktonic groups, under micronekton, fishes were the dominant item of the
samples. The common fishes recorded in the DSL were myctophids, gonostomatids, Bregmaceros, eel larvae and juveniles
of several other families of fishes. The estimated fish biomass varied from 0.01 to 45.5 g/ 1000 m3 in the DSL. This paper
describes the distribution and abundance of fish fauna in the DSL along various latitudes, depth, seasons and their diurnal
vertical migration.
 
Date 1990
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/5186/1/37_Preliminary_investigation_on_the_fish_biomass_in_the_Deep_Scattering_Layers_of_the_EEZ_of_Indi.pdf
Menon, N G (1990) Preliminary investigation on the fish biomass in the Deep Scattering Layers of the EEZ of India. In: Proceedings of the first workshop on scientific results of FORV Sagar Sampada, 5-7 June 1989, Kochi.