Assessment Of Density And Biomass Of Ocean Quahog, Arctica Islandica, Using A Hydraulic Dredge And Underwater Photography

Thorarinsdóttir, Gudrun G.; Ragnarsson, Stefan Áki

doi:10.17895/ices.pub.25636002.v1

P2401.pdf (45.97 kB)

Assessment Of Density And Biomass Of Ocean Quahog, Arctica Islandica, Using A Hydraulic Dredge And Underwater Photography

conference contribution

posted on 2024-04-25, 09:40 authored by Gudrun G. Thorarinsdóttir, Stefan Áki Ragnarsson

No abstracts are to be cited without prior reference to the author.

The stock of Arctica islandica in Iceland has been assessed using a commercial hydraulic dredge and underwater photography. Abundance estimates based on count of siphons from underwater photographs were much higher than from analysis of the dredge catches. Furthermore the efficiency of the two hydraulic dredges was investigated in tow locations giving different results. The movement of the clams down into the sediment can affect the dredge efficiency and also cause underestimation of stock size based on underwater photographic survey.

History

Symposia

2001 ICES Annual Science Conference, Oslo, Norway

Session

Theme Session P on Quality and Precision of Basic Data Underlying Fish Stock Assessment and Implications for Fisheries Management Advice

Abstract reference

P:24

Recommended citation

[Authors]. 2001. Assessment Of Density And Biomass Of Ocean Quahog, Arctica Islandica, Using A Hydraulic Dredge And Underwater Photography. 2001 ICES Annual Science Conference, Oslo, Norway. CM 2001/P:24. https://doi.org/10.17895/ices.pub.25636002