Study of biomass rate, catch per unit area (CPUA), distribution and abundance of demersal fishes in deep-sea layers of Oman Sea

Study of biomass rate, catch per unit area (CPUA), distribution and abundance of demersal fishes in deep-sea layers of Oman Sea

Authors

  • Reza Abbaspour Naderi Islamic Azad University, Research and Science Branch, Iran, Iran, Islamic Republic of
  • Gholamhossein Vosoughi Islamic Azad University, Research and Science Branch, Iran, Iran, Islamic Republic of
  • Tooraj Valinasab Iranian Fisheries Research Organization, Iran, Iran, Islamic Republic of
  • Shahla Jamili Islamic Azad University, Research and Science Branch, Iran, Iran, Islamic Republic of

Keywords:

Biomass, Bottom trawl net, Demersal fishes, catch per unit area (CPUA), Oman Sea

Abstract

In this study, we used "Ferdows 1" research vessel and sampling conducted on random basis, through 119 sampling stations in 7 zones with 4 deep-sea layers as: 10-20, 20-30, 30-50 and 50-100 meters, throughout the Oman Sea. Achieved data recorded in pre-schemed forms and processed through "Excel" and "Arc View GIS" soft wares.
One hundred species or genus identified in bottom trawl catch composition which categorized as commercial and non-commercial species. The total biomass of aquatics in bottom trawl net estimated as 52472.7 Mt. 60% of this amount allocated to commercial
demersal species with 31651.7 Mt.
Comparing biomass rates in the Oman Sea layers, it is determined that the maximum biomass rate is in 50-100 and 10-20 meter layers, respectively.
Study of CPUA in 7 zones of the Oman Sea revealed that identical to biomass, zone F (Sirik to Jask) positioned first with 20162 Kg per square nautical mile. For 10-20 meter layer, CPUA is 1.6 folded in 50-100 meter depth.

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Published

2010-04-27

Issue

Vol. 2 No. 2 (2010)

Section

Articles

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