Using Vessel Monitoring System Data to Estimate Spatial Effort in Bering Sea Fisheries for Unobserved Trips
Vessel monitoring system (VMS) technology records the time, location, bearing, and speed for fishing vessels that have the technology on board. VMS equipment has been put in place on all vessels in a number of fisheries, including all trawling vessels that fish for pollock, cod, and Atka mackerel in...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.9255 http://www.psmfc.org/efin/docs/Haynie Sullivan VMS Oct 4 08_Final_Deliverable.pdf |
| Summary: | Vessel monitoring system (VMS) technology records the time, location, bearing, and speed for fishing vessels that have the technology on board. VMS equipment has been put in place on all vessels in a number of fisheries, including all trawling vessels that fish for pollock, cod, and Atka mackerel in the United States Eastern Bering. VMS technology has been used in enforcement but a limited amount of work has been done utilizing VMS data to improve estimates of fishing activity. This paper integrates VMS data and National Marine Fisheries Service (NMFS) observer data from the United States Eastern Bering Sea pollock fishery to predict whether or not fishing is occurring for unobserved fishing trips. While there is 100 percent observer coverage for all catcher-processors and motherships in the fishery and some of the vessels that deliver to shoreside processors, approximately 2/3s of catcher vessels that deliver to shoreside processors have coverage for only 30 percent of their fishing days. The primary goals of this paper are to determine how accurately we can predict fishing for observed vessels and to estimate where and when fishing occurs for the unobserved trips of the vessels |
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