NEAMAP and SEAMAP Trawl Vessel and Gear Calibration Workshop

Starts January 16, 2024 8:45 am

Ends January 18, 2024 4:00 pm

Location Webinar

Information:Email: jpatel@asmfc.org

Description

Draft Agenda

Webinar Link: https://attendee.gotowebinar.com/register/8749481862227827036

The workshop aims to cover 2 objectives:

• Develop a flexible and practical guide for vessel calibrations and gear changes that could work for fisheries-independent trawl surveys operating on the U.S. East Coast
• Determine how to adjust for differences in the data caused by new vessels/gear

To meet these objectives, the workshop will be split into 3 topics over 3 days with a variety of sub-topics that were of particular interest:

Vessels

• Ideas on how to calibrate new vessels with limited funding
• Best practices on how to handle extended or periodic vessel outages or delays
• Addressing the use of multiple vessels by a survey

Gear

• Calibration of various gear types (ex: Uses of net mensuration systems to monitor consistencies in net geometry while conducting surveys, options for conducting paired sets, etc.)
• Species-specific calibration factors vs aggregated species selectivity ratios

Analysis/Data

• Review of software/statistical packages to assist with analysis and/or draft code
• Review of existing vessel calibration studies and conclusions (e.g., ratio estimators vs MLE, etc., minimal sample size determination)
• Approaches to generate a consistent time-series of data when paired tows have not been conducted (e.g., VAST).

The end goals are as follows:

• Create a list of best practices for vessel and gear calibrations
• Create a reference document for analysis after a gear change/vessel change has occurred
• A reference folder of common vessel calibration and gear change literature

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