A fp7 Project: Management and Monitoring of Deep-sea Fisheries and Stocks wp2 – Template for Case Study Reports Case study 2 demersal deep-water mixed fishery Pascal Lorance, Ifremer, Nantes (coord.)


Section 4.Data inventory 4.1.Fisheries data



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Section 4.Data inventory

4.1.Fisheries data

4.1.1.Fleet composition


For recent years, fleet composition data were extracted from CFR (Common fleet register). For French fleets these data are provided in the file Licensed_DWfleetFR_CFR2003-08.csv. It includes French vessels that were licensed to prosecute deep-water fishing from 2003 to 2009.

Deep-water licenses where issued in application of council regulation (EC) No 2347/2002 of 16 December 2002 establishing specific access requirements and associated conditions applicable to fishing for deepseastocks. The regulation entered into force on 01/01/2003.


Table 4.1.1. Variables in the file Licensed_DWfleetFR_CFR2003-08.csv


Variable name

Description

year

Year for which the license applies. Vessels that were licensed for several years appears as many time in the file

vessel_id

Vessel Identifier

startDate

Date of start validity of license in a given year (1)

endDate

Date of end validity of license in a given year (1)

NAVS_CFR_COD

Code of vessel in Common Fleet Register (CFR)

(1) Licenses may not be valid all years. A new vessel may enter the fleet at any time in the year and an old vessel may be decommissioned. Also, if a vessel is sent to the shipyard for a time, then it is no longer in records of active vessels during this time and its license is suspended. In 2003-206, licenses have been attributed for full year. Only from 2007, licenses may apply to part of the year only in application of the rules above.

4.1.2.Effort data

Please complete the tables below for each fleet ID and append all available time-series data disaggregated by fleet if possible. Please label with (1) an asterisk if data exist but are not available (but state where they exist), (2) leave blank if no data exist at all and (3) label N/K if the existence of data is not known.


For demersal and pelagic trawlers:-


Fleet ID

Trawl type (single, double etc)

Min codend mesh size

Effort (days at sea)

Effort (days fishing)

Effort (hrs fishing)

GRT/GT of individual vessels

KW of individual vessels

Example

Single

70mm

1990-

2000-

2000-

1990-

N/A








































































Please cite the minimum level at which anonymised data in each field can be provided (haul/day/trip/month/year) and detail any additional relevant information here (e.g. data source – official logbooks or skippers tallybooks or both)


Anonymised data: catch per species and effort by month are statistical rectangle (1984-2008, i.e. including a long blue ling time series) are included in DEEPFISHMAN data website before the case study meeting. For more detailled levels, I'm unclear at which levels confidentiality becomes a problem. For dedicated analysis during the project, data can be aggregate in different way.
Data from other fleet (Spanish/Basque country fleet in VI and VII; Spanish fleet in International waters) are not available as case study data. Nevertheless, they may be obtained during the project if usefull for some analysis.
Tally book data were made available to ifremer by the industry (1992-2008 with most data in 2000-2007). Option for anonymisation and availability to the project will be discussed with the industry (not commitment at the moment)
For longliners:-
Not relevant


For netters:-


Fleet ID

Net type (gill, trammel etc)

Number of fleets

Length of fleets

Mesh size

Effort (days at sea)

Effort (days fishing)

Effort (soaktime)

GRT/GT of individual vessels












































































































Please cite minimum level at which anonymised data in each field can be provided (haul/day/trip/month/year) and

add any additional relevant information here (e.g. data source – official logbooks or skippers tallybooks or both).
[Not relevant]

4.1.2.1.Improvement of fishing effort data


How could the content, availability and quality of fishing effort data be improved for the fleets fishing your stock?
Fishing effort data of past years can be improved from tallybooks. In EU logbooks, fishing operations (individual tows and lines and net setting) carried out in the same day and rectangle are cumulated. For the French trawling fleet, tallybooks of haul by haul data were provided by the industry and allowed for better account of all factors in LPUEs (Lorance et al. 2009). Applied to all fleets such data would allow effort to be properly handled. Electronic logbook are under development on French vessels and data will be reported haul by haul including depth. It should be noted that this improvement is particular to deep-water fisheries where depth may vary a lot in a single statistical rectangle. Therefore, haul by haul data and fishing depth are much more crucial in deep water fisheries than in shelf fisheries were most of the depth information is conveyed by the statistical rectangle.
VMS data also allows for improvement of effort data as is allows for some particular uses such as estimating the fishery footprint and fine scale changes in effort distribution. Nevertheless, data such as tallybooks provided to Ifremer by the industry includes all the effort information (tow duration, depth, location) coupled with catch, while using VMS requires assumptions to identify fishing and steaming activities and coupling catch to VMS data is an unresolved issue.



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