The Northern Mozambique Channel
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Collaborative study of yellowfin tuna CPUE from multiple Indian Ocean longline fleets in 2018
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Collecting data on board French tropical tuna purse seiners with common observers: results of Orthongel's voluntary obse...
In order to comply with the different regulations and commitments requesting the presence of scientific observers onboard French purse seiners, and since it is not possible to embark more than one observer during a fishing trip, ORTHONGEL has imagined and implemented since July 2013 a program to facilitate and optimize the boarding of well-trained ...
Statistics of the French purse fishing fleet targeting tropical tunas in the Atlantic ocean (1991-2017)
In 2017, a total of 12 French vessels operated in the eastern Atlantic Ocean with 1 Bait Boat, 10 Purse Seiner and 1 supply vessel deploying FAD and managing a part of the FAD stock in the water. The total capacity weighted by the months of activity for each vessel is 9 907 t. The total nominal effort in 2017 was of 2794 fishing days and 2335 sets....
Global database and common toolbox for tuna fisheries
Assessing the status of tuna and tuna-like populations for providing management advice requires the analysis of multiple data sets collected by the Contracting Parties and Cooperating non-contracting parties of Tuna Regional Fisheries Management Organizations (tRFMOs) Conventions. Data on the magnitude and composition of landings, discards, and fis...
Data toolbox for fisheries : the case of tuna fisheries
Assessing the status of tuna and tuna-like populations for providing management advice requires the analysis of multiple data sets collected by the contracting parties and cooperating non-contracting parties of Tuna Regional Fisheries Management Organizations (tRFMOs) Conventions. Data on the magnitude and composition of landings, discards, and sh-...
Statistics of the French purse seine fishing fleet targeting tropical tunas in the Atlantic Ocean (1991-2014)
The French purse seine fleet was composed in 2014 of 9 purse seiners of storage capacity >700 t and >60 m length overall, and 1 support vessel of 40 m length overall. The fleet capacity and overall nominal effort have remained stable in the recent years with a total annual number of about 2,000 fishing sets made in 2014, among which 55% on free-swi...
Integrating scientific and French tropical tuna purse seine skippers knowledge for a better management of dFAD fisheries...
Since the mid 1990s, the use of drifting Fish Aggregating Devices (dFADs) by purse seiners, artificial objects specifically designed to aggregate fish, has become an important mean of catching tropical tunas. In recent years, the massive deployments of dFADs, as well as the massive use of tracking devices on dFADs and natural floating objects, such...
Standardization of catch rates for the eastern tropical atlantic bigeye tuna caught by the French purse seine DfAD fishe...
The drifting Fish Aggregating Device (dFAD) purse seine fishery is complex and fishing effort depends on a multitude of factors. Traditional indices of fishing effort such as searching time are meaningless for this fishery. We composed a comprehensive list of 28 candidate variables that describe the dFAD fishery and used them as predictors of fishi...
Estimating Ghanaian purse seine and baitboat catch during 2006-2013 : input data for 2015 bigeye stock assessment
Ghanaian industrial tuna fisheries data covering the period 2006-2013 were analyzed following guidelines provided during the ICCAT preparatory meeting for the 2015 assessment of bigeye tuna (Thunnus obesus; BET). To account for differences in fishing strategy and quality of data sources available, the fleet was split between a component of large pu...
