Haul duration experimental data set (0 & 30 minutes hauls)

Date 2003
Author(s) Battaglia Andre1, Biais Gerard1, Rochet Marie-Joelle1, Trenkel VerenaORCID1
Affiliation(s) 1 : Ifremer, France
DOI 10.17882/56531
Publisher SEANOE
Keyword(s) haul duration, trawl end effect, catchability

In 2003 two experiments were carried out in the Bay of Biscay to compare catch numbers obtained in standard research 30-min hauls with those from 0-min hauls to determine the so called end effect. The end effect in trawl catches is defined as the proportion of the fish catch taken during shooting and hauling of the net, a period excluded from what is nominally referred to as haul duration. In 0-hauls the trawl was hauled as soon as the trawl geometry stabilized on the seabed. The trawl used was a beam trawl rigged as twin trawl. Overall 24 hauls were carried out, six 30-min and 18 0-min hauls. Average catch ratios (0-min/30-min hauls) ranged from 0.05 (s.d. 0.06) for sole to 0.34 (s.d. 0.64) for hake.

Licence CC-BY-NC-ND
Sensor metadata

beam trawl and temperature sensor

File Size Format Processing Access
Read me file describing data format 1 KB TEXTE Open access
Station details for each haul 3 KB CSV Processed data Open access
Catch by species 14 KB CSV Quality controlled data Open access
Length measurements by species 41 KB CSV Processed data Open access
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How to cite 

Battaglia Andre, Biais Gerard, Rochet Marie-Joelle, Trenkel Verena (2003). Haul duration experimental data set (0 & 30 minutes hauls). SEANOE. https://doi.org/10.17882/56531