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Daily and seasonal estimates of the recruitment and biomass of glass eels runs (Anguilla anguilla) and exploitation rates in the Adour open estuary (Southwestern France)

Published online by Cambridge University Press:  03 February 2010

Noëlle Bru ,
Patrick Prouzet  and
Michel Lejeune
Noëlle Bru
Affiliation:
Laboratoire de Mathématiques et ses Applications, UMR CNRS 5142, Université de Pau et des Pays de l'Adour, 64013 Pau Cedex, France
Patrick Prouzet
Affiliation:
Laboratoire Ressources Halieutiques d'Aquitaine IFREMER, Campus de Montaury, Anglet, France
Michel Lejeune
Affiliation:
Laboratoire de Statistique et Analyse des Données, BSHM, 1251 avenue centrale BP 47, 38040 Grenoble Cedex 09, France
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Abstract

The European eel (Anguilla anguilla) is drastically declining in all its distribution area and listed in the red list of the IUCN (International Union for Conservation of Nature). A rebuilding plan was adopted at European level in 2007, Regulation R(CE) 100/2007, to restore eel abundance to the level observed during the seventies. Its implementation started on the 1st of January 2009. This species is heavily threatened by numerous activities including fishing, and its management can only be effective through a systemic approach minimizing the whole range of human-induced impacts on the resource and its habitat. In the framework of the European interregional programme INTERREG IIIB-Atlantic Area– the INDICANG project aimed at elaborating abundance indicators of the European eel in the central part of its distribution area (http://www.ifremer/fr/indicang/). A methodological guide was elaborated by this project to define the indicators needed for this resource assessment. In this framework, Ifremer (Institut Français pour l'Exploitation de la Mer) and the UPPA University (Université de Pau et des Pays de l'Adour) have developed a method to estimate the daily and seasonal biomass of glass eels with the view to evaluate the fishery's impact on the estuarine eel recruitment to the Adour catchment. The estimation method uses observations from nightly scientific surveys to estimate glass eels' densities in the water column during various flood tides characterized by different hydrodynamic conditions. Information on these conditions allows the estimation of the glass eels biomass migrating during the night. From these estimates and reported catches made by the fishery during the same night, the exploitation rate applied by the fishery on the flow of glass eels progressing upstream during night flood tides is estimated. The relationship between the exploitation rate, fishery catches and hydrodynamic conditions allowed the estimation of the exploitation rate and nocturnal biomass fluctuations during the fishing season, from November 1st to March 31st of the following year. Finally, from the chronological series of biomass migrating at night, the total biomass migrating every day and the total recruitment into the estuary, during the main glass eel migration period, are estimated. Estimations made between 1998 and 2005 indicate that the overall rate of exploitation of the marine and continental fisheries, on average, is of 15.7%, ranging between 8 and 25% according to fishing seasons.

Keywords

Biomass estimatesExploitation rateTime seriesRiverGlass eelAnguilla anguilla
Type
Research Article
Information
Aquatic Living Resources , Volume 22 , Issue 4 , October 2009 , pp. 509 - 523
Copyright
© EDP Sciences, IFREMER, IRD, 2009

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References

Adam G., Feunteun E., Prouzet P., Rigaud C., 2008a, L'anguille européenne : indicateurs d'abondance et de colonisation. Coll. Savoir-faire, éditions Quae, Versailles.
Adam G., Castelnaud G., Cuende F.-X., Diaz E., Feunteun E., Girard P ., Laffaille P., Lauronce V., Muchiut S., Orroz-Urrizalki I., Prouzet P., Rigaud C., Soulier L., Susperregui N., 2008b, La vie de l'anguille. In: Adam G., Feunteun E., Prouzet P., Rigaud C. (eds.) L'anguille européenne : indicateurs d'abondance et de colonisation. Coll. Savoir-faire, éditions Quae Versailles, pp. 19–41.
Anonymous, 2005, Pêches professionnelles et scientifiques de la civelle en estuaire de Vilaine (Morbihan) : Bilan de la saison de pêche 2004-2005. Rapp. Institution d'Aménagement de la Vilaine http://www.ifremer.fr/indicang/boite-bassins-versants/pdf/peche-prof-scient-civelles-vilaine-2005.pdf
Bardonnet, A., Bolliet, V., Belon, V., 2005, Recruitment abundance estimation. Role of glass eels (Anguilla anguilla) response to light. J. Exp. Mar. Biol. Ecol. 321, 181–190. CrossRef
Bolliet, V., Labonne, J., 2008, Individual patterns of rhythmic swimming activity in Anguilla anguilla glass eels synchronised to water current reversal. J. Exp. Mar. Biol. Ecol. 362, 125–130. CrossRef
Briand, C., Fatin, D., Feunteun, E., Fontenelle, G., 2003, Estuarine and fluvial recruitment of European glass eel in a fished Atlantic estuary. Fish. Manage. Ecol. 10, 377–384. CrossRef
Bru N., Lejeune M., Prouzet P., 2006, Estimating daily passive fish abundance in an open estuary from sparse data in spatio-temporal sampling: particular case of glass eel flows. Prépublication LMA, Université de Pau http://hal.archives-ouvertes.fr/hal-00221421/fr/
Cantrelle I., 1981, Etude de la migration et de la pêche des civelles (Anguilla anguilla, L.) dans l'estuaire de la Gironde. Thèse $3^{\text{\`{e}me}}$ cycle, Univ. Paris VI.
Chambers J.M., Hastie T.J. (eds.), 1992, Statistical models. Wadsworth and Brooks/ Cole.
Creutzberg, F., 1961, On the orientation of migrating elvers (Anguilla vulgaris) in a tidal area. Neth. J. Sea Res. 1, 257–338. CrossRef
Cuende F.-X., Caill-Milly N., Prouzet P., 2002, Site atelier de l'Adour. Contrat PECOSUDE : Caractéristiques des petites pêches côtières et estuariennes de la côte atlantique du sud de l'Europe, N° 99/024.
De Casamajor, M.-N., Bru, N., Prouzet, P., 1999, Influence de la luminosité nocturne et de la turbidité sur le comportement vertical de migration de la civelle d'anguille (Anguilla anguilla L.) dans l'estuaire de l'Adour. Bull. Fr. Pêche Piscic. 355, 327–347. CrossRef
Edeline E., Dufour S., Elie P., 2005. Role of glass eel salinity preference in the control of habitat selection and growth plasticity in Anguilla anguilla. Mar. Ecol. Prog. Ser. 304, 191–199.
Edeline E., Lambert P., Rigaud C., Elie P., 2006. Effects of body condition and water temperature on Anguilla anguilla glass eel migratory behavior. J. Exp. Mar. Biol. Ecol. 331, 217–225.
Fan J., Yao Q., 2005, Nonlinear time series: nonparametric and parametric methods. Springer.
Hamilton J.D., 1994, Time series analysis. Princeton University Press.
Jellyman, D.J., Booker, D.J., Watene, E., 2009, Recruitment of Anguilla spp. glass eels in the Waikato River, New Zealand. Evidence of declining migrations? J. Fish Biol. 74, 2014–2033. CrossRef
Lissardy M., De Casamajor M.-N., Sanchez F., Prouzet P., Morandeau G., Cuende F.-X., 2005, Caractérisation et abondance des captures professionnelles estuariennes dans l'estuaire de l'Adour en 2004. Rapp. Cereca-Ifremer-Institution Adour.
Nielssen T., Prouzet P., 2008, Capture-based aquaculture of the wild European eel (Anguilla anguilla). In: Lovatelli A., Holthus P.F. (eds.). Capture-based aquaculture. Global overview. FAO Fisheries Rome, FAO, Techn. Pap. N° 508, pp. 155–182.
McCleave, J.D., Wippelhauser, G.S., 1987, Behavioral aspects of selective tidal stream transport in juvenile American eels. Am. Fish. Soc. Symp. 1, 138–150.
Prouzet P., Lissardy M., Morandeau G., Cuende F.-X., 2001, La pêche maritime professionnelle dans l'estuaire de l'Adour en 2000 : Importance économique et caractéristiques des captures de poissons migrateurs amphihalins. Rapp. Ifremer DRV/RST/RH/2001-08.
Prouzet P. (coord.), 2002, Historique des captures de civelles, intensité actuelle de leur exploitation, variation de leur capturabilité par la pêche professionnelle maritime et indice de colonisation sur le bassin versant de l'Adour. Rapp. final, contrat EC/DG FISH (DGXIV) N° 99/023.
Prouzet P., (coord.) 2003, Etude sur la civelle (Anguilla anguilla) dans l'estuaire de l'Adour : Pêche, biologie, comportement, modélisations hydrodynamique et comportementale, estimations des flux de civelles en estuaire. Rapp. Institution Adour-Ifremer-UPPA.
Prouzet, P., 2004, INDICANG: un projet pour synthétiser nos connaissances sur l'anguille et sur la qualité de ses habitats par la mise en réseau d'opérations de suivis régionaux à une échelle de dimension européenne. Chron. Eur. 54, 50-51.
Prouzet P., Bouvet J.-C., Bru N., Boussouar A., 2007, Quantification de la biomasse de civelles (Anguilla anguilla) dans l'estuaire de la Loire et estimation du taux d'exploitation saisonnier de la pêche professionnelle pour les saisons de pêche 2003 à 2005. Rapp. INDICANG, http://w3.ifremer.fr/indicang/boite-bassins-versants/pdf/rapport-saison-bv-loire.pdf
Prouzet P., Bouvet J.C., Bru N., Duquesne E., Antunes J.-C., Damasceno-Oliveira A., Boussouar A., De Casamajor M.-N., Sanchez F., Lissardy, M., 2008, Indicateurs de recrutement estuarien. In : Adam G., Feunteun E., Prouzet P. , Rigaud C. L'anguille européenne : indicateurs d'abondance et de colonisation. Coll. Savoir-faire Editions Quae, pp. 223–274.
Prouzet P., Odunlami M., Duquesne E., Boussouar A., 2009, Analysis and visualization of the glass eel behavior (Anguilla anguilla) in the Adour estuary and estimate of its upstream migration speed. Aquat. Living Resour. 22,
Rigaud C., Lafaille P., Prouzet P., Feunteun E., Diaz E., Castellano J., De Casamajor M.-N., 2008, Des compléments sur la biologie. In: Adam G., Feunteun E., Prouzet P., Rigaud C. (eds.) L'anguille européenne : indicateurs d'abondance et de colonisation. Coll. Savoir-faire éditions Quae, pp. 43–86.
Stevens Don, L Jr., Urquhart, N. Scott, 2000, Response designs and support regions in sampling continuous domains. Environmetrics 11, 13–41. 3.0.CO;2-8>CrossRef
Susperregui N., Boussouar A, Bru N., De Casamajor M.-N., Lissardy M., Sanchez F., Duquesne E., Prouzet P., Durozoi B., Lambert P., Paquignon G., 2007, Rapp. final Indicang : caractérisation de la pêcherie professionnelle de civelles sur l'Isle–Bassin versant Gironde–Garonne–Dordogne. http://www.ifremer.fr/indicang/boite-bassins-versants/pdf/rapport-final-pecherie-bv-gironde.pdf