Parent Layer:
At-Sea Midwater Trawl Mothership (2002-2005)
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Description: Abstract: This data layer depicts the proportion of fishing effort for at-sea processed commercial midwater mothership catcher vessels off the U.S. West Coast from 1 Jan 2002 to 31 Dec 2005. Records of at-sea processed midwater trawl tows were compiled from observer records from the At-Sea Hake Observer Program (A-SHOP). The polygon layer is a vector layer with values representing the proportion of all lines coastwide intersecting each 10 x 10 min cell. The benefit of this output over depicting lines themselves is that all data can be represented, while still ensuring confidentiality of individual fishing locations.This spatial summary of fishing effort was developed from lines connecting gear set and retrieval points. It is recognized that fishing events, particularly for mobile gears, rarely follow straight-line paths; however, this was the most readily available information. This summary is not intended to quantify total impact of fishing on either benthic or pelagic habitats. Purpose: The main purpose of this data layer is to help inform the National Marine Fisheries Service Biological Opinion on Continuing Operation of the Pacific Coast Groundfish Fishery (NMFS 2012). In 2011, new regulations governing the limited entry bottom trawl and midwater trawl fisheries led to the induction of individual fishing quotas (IFQs). Primary goals of IFQ management included decreased bycatch and increased catch accountability, profitability, and efficiency. In the shoreside bottom trawl fishery, permit holders with IFQ and a trawl endorsement can use multiple gear types (although not within the same trip), including bottom trawl, midwater trawl, hook-and-line gear, and pot gear. These management changes could impact fishing effort in trawl sectors, as well as alter fixed gear fishing effort by providing a new opportunity for fixed gear fishing activity and potential competition between IFQ and other fixed gear sectors. This data layer displays fishing effort to assess these potential changes. NMFS (National Marine Fisheries Service). 2012. Continuing Operation of the Pacific Coast Groundfish Fishery - Endangered Species Act (ESA) Section 7(a)(2) Biological Opinion and Section 7(a)(2) "Not Likely to Adversely Affect" Determination. PCTS Number: NWR-2012-876. 194 p. Credit: Fishery Resource Analysis and Monitoring Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration
Copyright Text: Fishery Resource Analysis and Monitoring Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration
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