Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-19T14:48:25.922Z Has data issue: false hasContentIssue false
  • English
  • Français

Bycatch of the European purse seine tuna fishery in the Atlantic Ocean for the 2003–2007 period

Published online by Cambridge University Press:  04 February 2011

Monin Justin Amandè ,
Javier Ariz ,
Emmanuel Chassot ,
Alicia Delgado de Molina ,
Daniel Gaertner ,
Hilario Murua ,
Renaud Pianet ,
Jon Ruiz  and
Pierre Chavance
Monin Justin Amandè
Affiliation:
Université de Montpellier 2, Place Eugène Bataillon, 34090 Montpellier, France
Javier Ariz
Affiliation:
Instituto Español de Oceanografía, Apdo. Correos 1373, 38080 S/C Tenerife, Canary Island, Spain
Emmanuel Chassot
Affiliation:
Institut de Recherche pour le Développement, CRHMT - UMR 212, Avenue Jean Monnet, BP 171, 34200 Sète Cedex, France
Alicia Delgado de Molina
Affiliation:
Instituto Español de Oceanografía, Apdo. Correos 1373, 38080 S/C Tenerife, Canary Island, Spain
Daniel Gaertner
Affiliation:
Institut de Recherche pour le Développement, CRHMT - UMR 212, Avenue Jean Monnet, BP 171, 34200 Sète Cedex, France
Hilario Murua
Affiliation:
AZTI Tecnalia, Herrera Kaia, Portualde z/g, 20110 Pasaia (Gipuzkoa), Spain
Renaud Pianet
Affiliation:
Institut de Recherche pour le Développement, CRHMT - UMR 212, Avenue Jean Monnet, BP 171, 34200 Sète Cedex, France
Jon Ruiz
Affiliation:
AZTI Tecnalia, Herrera Kaia, Portualde z/g, 20110 Pasaia (Gipuzkoa), Spain
Pierre Chavance*
Affiliation:
Institut de Recherche pour le Développement, CRHMT - UMR 212, Avenue Jean Monnet, BP 171, 34200 Sète Cedex, France
*
a Corresponding auteur: [email protected]
Get access

Abstract

Bycatch of several groups of species and their characteristics are presented for the period 2003 to 2007 for the European purse seine tuna fishery operating in the Atlantic Ocean. Data were collected through French and Spanish observer programmes and represented a total of 27 trips corresponding to 2.9% coverage. Bycatch is defined as non-targeted species and small or damaged target species. Bycatch species composition, main species length, sex ratio and the fate of the most common species are presented first. Stratified ratios relative to landings of major commercial tunas were then used to estimate the total bycatch; these ratios were considered the most appropriate variable for extrapolation. Stratification was based on the fishing mode (free school vs. floating object), season (quarters) and spatial areas. The annual average bycatch was estimated at about 6400 t, corresponding to a mean annual value of 80.8 t per 1000 t of tuna landed or 7.5% of the total catch. Tunas represent 83% (67.2 t/1000 t) of the total bycatch, followed by other bony fishes (10%, 7.8 t/1000 t), billfishes (5%, 4.0 t/1000 t), sharks (1%, 0.9 t/1000 t) and rays (1%, 0.9 t/1000 t). Based on estimates of the annual bycatch, 16% was kept on board and sold in local markets.

Keywords

BycatchDiscardsTuna fisheriesPurse seiningAtlantic Ocean
Type
Research Article
Information
Aquatic Living Resources , Volume 23 , Issue 4 , October 2010 , pp. 353 - 362
Copyright
© EDP Sciences, IFREMER, IRD 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Références

Alverson D.L., Freeberg M.H., Pope J.G., Murawski S.A., 1994, A global assessment of fisheries by catch and discards. FAO Fish. Tech. Pap. 339, 233 p.
Amandè M.J., Ariz J., Chassot E., Chavance P., Delgado de Molina A., Gaertner D., Murua H., Pianet R., Ruiz J., 2008, By-catch and discards of the European purse seine tuna fishery in the Indian ocean: Characteristics and estimation for the 2003-2007 period. IOTC-2008-WPEB-12, 23 p.
Amon-Kothias, J.B., Bard, F.X., Hervé, A., 1996, Mise à jour des quantités de “Faux poissons" débarqués par les senneurs à Abidjan. Coll. Vol. Sci. Pap. ICCAT 45, 227-228. Google Scholar
Ariz, J., Delgado de Molina, A., Fonteneau, A., Gonzalez Costas, F., Pallarés, P., 1999, Logs and tunas in the eastern tropical Atlantic. A review of present knowledge and uncertainties. In: Scott M.D., Bayliff W.H., Lennert-Cody C.E., Schaefer K.M. (Eds.). Proc. International Workshop on the Ecology and Fisheries for Tunas Associated with Floating Objects, February 11-13, 1992, Inter-Am. Trop. Tuna Comm. Spec. Rep. 11, 21-65. Google Scholar
Bard, F.X., Amon-Kothias, J.B., 1985, Evaluation des débarquements de thonidés mineurs et istiophoridés au port d’Abidjan de 1981-1984. Coll. Vol. Sci. Pap. ICCAT 23, 333-336. Google Scholar
Borges, L., Zuur, A.R., Rogan, E., Officer, R., 2005, Choosing the best sampling unit and auxiliary variable for discards estimations. Fish. Res. 75, 29-39. CrossRefGoogle Scholar
Canty A., Ripley B., 2010, Boot: Bootstrap R (S-Plus) Functions. R package version 1.2-42.
Chuenpagdee, R., Morgan, L.E., Maxwell, S.M., Norse, E.A., Pauly, D., 2003, Shifting gears: assessing collateral impacts of fishing methods in U.S. waters. Front. Ecol. Environ. 1, 517-524. CrossRefGoogle Scholar
Davies R.W.D., Cripps S.J., Nickson A., Porter, G., 2009, Defining and estimating global marine fisheries bycatch. Mar. Pollut. 33, 661-672.
Delgado de Molina, A., Ariz, J., Gaertner, D., Santana, J.C., 2000, Estimación de la importancia de las capturas de especies accesorias y de descartes en la pesquería de cerco de túnidos tropicales en el océano Atlántico oriental. Collect. Vol. Sci. Pap. ICCAT 51, 1859-1875. Google Scholar
FAO, 1999, Guidelines for the routine collection of capture fishery data. Prepared at the FAO/DANIDA Expert Consultation. Bangkok, Thailand, 18-30 May 1998. FAO Fisheries Tech. Pap. 382, Rome, 113 p.
Fletcher, D., MacKenzie, D., Villouta, E., 2005, Modelling skewed data with many zeros: a simple approach combining ordinary and logistic regression. Environ. Ecol. Stat. 12, 45-54. CrossRefGoogle Scholar
Fonteneau A., Pallarés P., Pianet R., 2000, A worldwide review of purse seine fisheries on FADs. In: Cayré P., Le Gall J. Y., Taquet M. (Eds.) Pêche thonière et dispositifs de concentration de poissons, Colloque Caraïbe-Martinique, Trois-Ilets, 15-19 octobre 1999. Institut de recherche pour le développement, Institut français de recherche pour l’exploitation de la mer, Ecole nationale supérieure agronomique de Rennes. Editions Quae, 684 p.
Gaertner, D., Ménard, F., Develter, C., Ariz, J., Delgado de Molina, A., 2002, By-catch of billfishes by the European tuna purse seine fishery in the Atlantic Ocean. Fish. Bull. 100, 683-689. Google Scholar
Garcia S., Zerbi A., Do Chi T., Lasserre G., 2003, The ecosystem approach to fisheries. Issues, terminology, principles, institutional foundations, implementation and outlook. FAO Fish. Tech. Pap. 443, Rome, 76 p.
Goujon, M., 2004, Informations sur les captures accessoires des thoniers senneurs gérés par les armements français d’après les observations faites par les observateurs embarqués pendant les plans de protection des thonidés de l’Atlantique de 1997 à 2002. Coll. Vol. Sci. Pap. ICCAT 56, 414-431. Google Scholar
Hall M.A., García M., Lennert-Cody C.E., Arenas P., Miller F., 1999, The association of tunas with floating objects and dolphins in the eastern Pacific Ocean: a review of the current purse-seine fishery, in: Scott M.D., Bayliff W.H., Lennert-Cody C.E., Schaefer K.M. (Eds.). Proc. International Workshop on the Ecology and Fisheries for Tunas Associated with Floating Objects, February 11-13, Inter-Am. Trop. Tuna Comm. Spec. Rep. 11, 87-194.
Hall, M.A., Alverson, D.L., Metuzals, K.I., 2000, By-Catch: Problems and Solutions. Mar. Pollut. Bull. 41, 204-219. CrossRefGoogle Scholar
Hallier J.P., Parajua J.I., 1999, Review of tuna fisheries on floating objects in the Indian Ocean. In: Scott M.D. Bayliff W.H., Lennert-Cody C.E., Schaefer K.M. (Eds.). Proc. International Workshop on the Ecology and Fisheries for Tunas Associated with Floating Objects, February 11-13, 1992, Inter-Am. Trop. Tuna Comm. Spec. Rep. 11, 195-221.
Kelleher K., 2005, Discards in the world’s marine fisheries: an update. FAO Fish. Tech. Pap. 470, Rome, 131 p.
Klimley, A.P, Butler, S.B., Nelson, D.R., Stull, A.T., 1988, Diel movements of scallopped hammerhead sharks, Sphyrna lewini Griffith and Smith, to and from a seamount in Gulf of California. J. Fish Biol. 33, 751-761. CrossRefGoogle Scholar
Lawson T., 2001, Method for analysing bycatch with observer data. SCTB14 Working Paper. Noumea, New Caledonia: Secretariat of the Pacific Community, 14 p.
Lennert-Cody, C.E., 2001, Effects of sample size on bycatch estimation using systematic sampling and spatial post-stratification: summary of preliminary results. IOTC Proc. 4, 48-53. Google Scholar
Maguire J.J., Sissenwine M., Csirke J., Grainger R., Garcia S., 2006, The state of world highly migratory, straddling and other high seas fishery resources and associated species. FAO Fish. Tech. Pap. 495, Rome, 84 p.
Minami, M., Lennert-Cody, C.E., Gao, W., Romàn-Verdesoto, M., 2007, Modeling shark bycatch: The zero-inflated negative binomial regression model with smoothing. Fish. Res. 84, 210-221. CrossRefGoogle Scholar
Pallarés P., Hallier J.P., 1997, Analyse du schéma d’échantillonnage multi-spécifique des thonidés tropicaux. DG-Pêche n° 95/37, 1995-1997.
Pallarés, P., Petit, C., 1998, Tropical tunas: New sampling and data processing strategy for estimating the composition of catches by species and size. Coll. Vol. Sci. Pap. ICCAT 48, 230-246. Google Scholar
Pascoe S., 1997, By-catch management and the economics of discarding. FAO Fish. Tech. Pap. 370, Rome, 137 p.
Perkins, P.C., Edwards, E.F., 1996, A mixture model for estimating discarded bycatch from data with many zero observations: tuna discards in the eastern tropical Pacific Ocean. Fish. Bull. 94, 330-340. Google Scholar
Pianet R., Pallarés P., Petit C., 2000, New sampling and data processing strategy for estimating the composition of catches by species and sizes in the European purse seine tropical tuna fisheries. IOTC-WPDCS/2000/10.
Pianet R., Delgado de Molina A., Doriso J., Bretaudeau P., Hervé A., Ariz J., 2008, Statistics of the main purse seine fleets fishing in the Indian Ocean (1981-2007). IOTC-2008-WPTT-05, 25 p.
Pianet, R., Dewals, P., Delgado de Molina, A., Ariz, J., Sarralde, R., Dédo, R., Sow, F., 2009, Statistiques de la pêcherie thonière européenne et assimilée durant la période 1991-2007. Coll. Vol. Sci. Pap. ICCAT 64, 1133-1158. Google Scholar
Rochet, M-J., Trenkel, V. M., 2005, Factors for the variability of discards, assumptions and field evidence. Can. J. Fish. Aquat. Sci. 62, 224-235. CrossRefGoogle Scholar
Romagny B., Ménard F., Dewals P., Gaertner D., N’Goran N., 2000. Le "faux-poisson" d’Abidjan et la pêche sous DCP dérivants dans l’Atlantique tropical Est : circuit de commercialisation et rôle socio-économique. In : Cayré P., Le Gall J.Y., Taquet M. (Eds.) Pêche thonière et dispositifs de concentration de poissons, Colloque Caraïbe-Martinique, Trois-Ilets, 15-19 octobre 1999. Institut de recherche pour le développement, Institut français de recherche pour l’exploitation de la mer, Ecole nationale supérieure agronomique de Rennes. Editions Quae, 28, 634-652.
Romanov, E.V., 2002, By-catch in the tuna purse-seine fisheries of the western Indian Ocean. Fish. Bull. 100, 90-105. Google Scholar
Romanov, E.V., 2008, Bycatch and discards in the Soviet purse seine tuna fisheries on FAD-associated schools in the north equatorial area of the Western Indian Ocean. West. Indian Ocean J. Mar. Sci. 7, 163-174. Google Scholar
Sánchez S., Murua H., González I., Ruiz J., 2007, Optimum sample number for estimating shark by-catch in the Spanish Purse seiners in the western Indian Ocean. IOTC-2007-WPTT-26, 6 p.
Santana, J.C., Delgado de Molina, A., Delgado de Molina, R., Ariz R., Stretta J.M., Domalain, G., 1998, Lista faunística de las especies asociados a las capturas de atún de las flotas de cerco comunitarias que faenan en las zonas tropicales de los océanos Atlántico e Indico. Coll. Vol. Sci. Pap. ICCAT 48, 129-137.
Sarralde R., Ariz J., Delgado de Molina A., Pallarés P., Santana, J.C., 2004, Análisis de los datos obtenidos por observadores en atuneros cerqueros españoles en el océano Atlántico durante las últimas moratorias sobre objetos flotantes (2001-2002 y 2002-2003). ICCAT Coll. Vol. Sci. Pap. 56, 401-413.
Stratoudakis, Y., Fryer, R.J., Cook, R.M., Pierce, G.J., 1999, Fish discarded from Scottish demersal vessels: estimators of total discards and annual estimates for targeted gadoids. ICES J. Mar. Sci. 56, 592-605. CrossRefGoogle Scholar
Stretta, J.M., Delgado de Molina, A., Ariz, J., Domalain, G., Santana, J. C., 1997, Les espèces associées aux pêches thonières tropicales. Coll. Vol. Sci. Pap. ICCAT 46, 250-254. Google Scholar
Thompson S.K., 2002, Sampling. Wiley, New-York, Wiley Series in Probability and Mathematical Statistics.
Ye, Y., Alsaffar, A.H., Mohammed, H.M.A., 2000, Bycatch and discards of the Kuwait shrimp fishery. Fish. Res. 45, 9-19.CrossRefGoogle Scholar