Results of comparative fishing between the CCGS John Cabot and MV Calvert in the Newfoundland and Labrador Region in Spring 2023-2024

Abstract

Multispecies bottom trawl surveys are conducted annually in the spring and fall in the Newfoundland and Labrador (NL) Region using a Campelen 1800 survey trawl aboard Canadian Coast Guard Ships (CCGSs). These surveys are used to estimate the distribution and abundance of many fish and invertebrate species, to determine species life history characteristics, and form the basis of a number of ecosystem indicators. Through a collaborative agreement between Fisheries and Oceans Canada (DFO) and the Atlantic Groundfish Council, comparative fishing was undertaken between an industry trawler, Marine Vessel (MV) Calvert, and the CCGS John Cabot to determine comparability of the MV Calvert for potential use supporting or complementing DFO survey capacity. Analysis and review of data collected during paired fishing operations in 2023–24 are used to quantify differences in catchability between the MV Calvert and the current CCGSs in spring in North Atlantic Fisheries Organization (NAFO) Divisions 3LNO. Conversion factor analysis was completed for all taxa where sufficient data was collected, and functional groups. Data collected were sufficient to estimate conversions for seven taxa, and determine no conversion is required for 26 taxa. All other taxa had insufficient data to determine if a conversion factor is appropriate. No conversion is required for all seven functional groups.