Trawl hit Trawl hit an unknown obstruction, such as the unknown boat stops or crew recognize a bump on the No obstruction winch/wire. Doors - No No contact with bottom, the catch is nearly contact with empty with no obvious evidence of mud on the No bottom doors from digging into the sediment. Torn Net, parts of the net were torn and animals Torn Net No could potentially escape. Unusually low fish and invertebrate Unusually low abandance was unexpectedly low so cruise Yes catch leader decides to re-trawl. Improper Deck Time, crew did not follow the Improper Deck expected surface time established in the No Time manual for depths < 200m (expect 10 minutes but can be adjusted to pressuse sensor data). Improper Bottom Time, pressuse sensor Improper Bottom indicates bottom contact was less then 8 No Time minutes or greater then 15 minute. Inadequate trawl track, pressure sensor shows Inadequate trawl an undulating bottom while fathometer indicates No track an even bottom (irregular net bottom contact throughout trawl). 1 min trawl reveals excessive biomass of species High Density (e.g., red crabs) that would preclude 10 min Yes Species Incidence trawl of site Other - Trawl Other - another reason not listed why trawl Failure (comment Yes failed. req.) lu_TrawlQualifier Qualifier Description < less than Aliquot Count base on calculation of Aliquot None None Present Present, not counted lu_DebrisType
Trawl hit unknown obstruction Trawl hit an unknown obstruction, such as the boat stops or crew recognize a bump on the winch/wire. No Doors - No contact with bottom No contact with bottom, the catch is nearly empty with no obvious evidence of mud on the doors from digging into the sediment. No Torn Net Torn Net, parts of the net were torn and animals could potentially escape. No Unusually low catch Unusually low fish and invertebrate abandance was unexpectedly low so cruise leader decides to re-trawl. Yes Improper Deck Time Improper Deck Time, crew did not follow the expected surface time established in the manual for depths < 200m (expect 10 minutes but can be adjusted to pressuse sensor data). No Improper Bottom Time Improper Bottom Time, pressuse sensor indicates bottom contact was less then 8 minutes or greater then 15 minute. No Inadequate trawl track Inadequate trawl track, pressure sensor shows an undulating bottom while fathometer indicates an even bottom (irregular net bottom contact throughout trawl). No High Density Species Incidence 1 min trawl reveals excessive biomass of species (e.g., red crabs) that would preclude 10 min trawl of site Yes Other - Trawl Failure (comment req.) Other - another reason not listed why trawl failed. Yes lu_TrawlQualifier Qualifier Description < less than Aliquot Count base on calculation of Aliquot None None Present Present, not counted lu_DebrisType
B18InformationManagement_June29.docx