Limits...
Mapping Fishing Effort through AIS Data.

Natale F, Gibin M, Alessandrini A, Vespe M, Paulrud A - PLoS ONE (2015)

Bottom Line: After analysing a large AIS dataset for the period January-August 2014 and covering most of the EU waters, we show that AIS was adopted by around 75% of EU fishing vessels above 15 meters of length.Using the Swedish fleet as a case study, we developed a method to identify fishing activity based on the analysis of individual vessels' speed profiles and produce a high resolution map of fishing effort based on AIS data.The method was validated using detailed logbook data and proved to be sufficiently accurate and computationally efficient to identify fishing grounds and effort in the case of trawlers, which represent the largest portion of the EU fishing fleet above 15 meters of length.

View Article: PubMed Central - PubMed

Affiliation: European Commission Joint Research Centre Institute for the Protection and Security of the Citizen, Ispra, Italy.

ABSTRACT
Several research initiatives have been undertaken to map fishing effort at high spatial resolution using the Vessel Monitoring System (VMS). An alternative to the VMS is represented by the Automatic Identification System (AIS), which in the EU became compulsory in May 2014 for all fishing vessels of length above 15 meters. The aim of this paper is to assess the uptake of the AIS in the EU fishing fleet and the feasibility of producing a map of fishing effort with high spatial and temporal resolution at European scale. After analysing a large AIS dataset for the period January-August 2014 and covering most of the EU waters, we show that AIS was adopted by around 75% of EU fishing vessels above 15 meters of length. Using the Swedish fleet as a case study, we developed a method to identify fishing activity based on the analysis of individual vessels' speed profiles and produce a high resolution map of fishing effort based on AIS data. The method was validated using detailed logbook data and proved to be sufficiently accurate and computationally efficient to identify fishing grounds and effort in the case of trawlers, which represent the largest portion of the EU fishing fleet above 15 meters of length. Issues still to be addressed before extending the exercise to the entire EU fleet are the assessment of coverage levels of the AIS data for all EU waters and the identification of fishing activity in the case of vessels other than trawlers.

No MeSH data available.


Map of coverage of the AIS signal in the study area.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4476776&req=5

pone.0130746.g007: Map of coverage of the AIS signal in the study area.

Mentions: The final map in Fig 7 shows the geographic extent of the analysis area together with the areas of weak signal coverage. The latter are located in areas distant from the coastline where the VHF propagation can be not optimal. In the west zone we can notice two areas with poor coverage separated by a big area where coverage is good. We can assume that the good coverage area is due to the presence of AIS base stations installed on offshore platforms.


Mapping Fishing Effort through AIS Data.

Natale F, Gibin M, Alessandrini A, Vespe M, Paulrud A - PLoS ONE (2015)

Map of coverage of the AIS signal in the study area.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4476776&req=5

pone.0130746.g007: Map of coverage of the AIS signal in the study area.
Mentions: The final map in Fig 7 shows the geographic extent of the analysis area together with the areas of weak signal coverage. The latter are located in areas distant from the coastline where the VHF propagation can be not optimal. In the west zone we can notice two areas with poor coverage separated by a big area where coverage is good. We can assume that the good coverage area is due to the presence of AIS base stations installed on offshore platforms.

Bottom Line: After analysing a large AIS dataset for the period January-August 2014 and covering most of the EU waters, we show that AIS was adopted by around 75% of EU fishing vessels above 15 meters of length.Using the Swedish fleet as a case study, we developed a method to identify fishing activity based on the analysis of individual vessels' speed profiles and produce a high resolution map of fishing effort based on AIS data.The method was validated using detailed logbook data and proved to be sufficiently accurate and computationally efficient to identify fishing grounds and effort in the case of trawlers, which represent the largest portion of the EU fishing fleet above 15 meters of length.

View Article: PubMed Central - PubMed

Affiliation: European Commission Joint Research Centre Institute for the Protection and Security of the Citizen, Ispra, Italy.

ABSTRACT
Several research initiatives have been undertaken to map fishing effort at high spatial resolution using the Vessel Monitoring System (VMS). An alternative to the VMS is represented by the Automatic Identification System (AIS), which in the EU became compulsory in May 2014 for all fishing vessels of length above 15 meters. The aim of this paper is to assess the uptake of the AIS in the EU fishing fleet and the feasibility of producing a map of fishing effort with high spatial and temporal resolution at European scale. After analysing a large AIS dataset for the period January-August 2014 and covering most of the EU waters, we show that AIS was adopted by around 75% of EU fishing vessels above 15 meters of length. Using the Swedish fleet as a case study, we developed a method to identify fishing activity based on the analysis of individual vessels' speed profiles and produce a high resolution map of fishing effort based on AIS data. The method was validated using detailed logbook data and proved to be sufficiently accurate and computationally efficient to identify fishing grounds and effort in the case of trawlers, which represent the largest portion of the EU fishing fleet above 15 meters of length. Issues still to be addressed before extending the exercise to the entire EU fleet are the assessment of coverage levels of the AIS data for all EU waters and the identification of fishing activity in the case of vessels other than trawlers.

No MeSH data available.