Scientia Marina, Vol 70, No 4 (2006)

Modelling small-scale coastal fisheries of Galicia (NW Spain) based on data obtained from fisheries: the case of Sepia officinalis

Francisco Rocha
Grupo Zoología Marina, Dep. Ecología y Biología Animal, Universidad de Vigo , Spain

Jaime Otero
ECOBIOMAR, Instituto de Investigaciones Marinas (CSIC), Vigo , Spain

Raquel Outeiral
ECOBIOMAR, Instituto de Investigaciones Marinas (CSIC), Vigo , Spain

Ángel F. González
ECOBIOMAR, Instituto de Investigaciones Marinas (CSIC), Vigo , Spain

Joaquín Gracia
ECOBIOMAR, Instituto de Investigaciones Marinas (CSIC), Vigo , Spain

Ángel Guerra
ECOBIOMAR, Instituto de Investigaciones Marinas (CSIC), Vigo , Spain


The small-scale cuttlefish (Sepia officinalis) fishery in Galician waters (NW Spain) was studied using a model based on data obtained from fishers. This model was applied using information obtained from the small-scale Galician fleet in 1998. A total of 139 personal interviews were carried out at 62 Galician ports. This information was used to estimate catches per unit effort (CPUE) and total catch for the cuttlefish gillnet fishery. The fleet, which fishes in Galician waters within ICES divisions VIIIc and IXa, was composed of two groups: 600 vessels fishing for cuttlefish in only five months of the year (short season: November to March), and 141 vessels fishing for cuttlefish all year (extended season). Estimated total catch during the fishing season for the whole Galician fleet was 1301 t (869 t short season and 432 t extended season) and average CPUE values were 14.5 kg haul-1 trip-1 vessel-1 (short season) and 12.8 kg haul-1 trip-1 vessel-1 (extended season). To test the reliability of the model, the outputs obtained from the model for a subset of 37 ports (59.7% of all ports) were compared with the official catch statistics for these ports. Differences between total catches estimated by the model and those determined directly at these ports were not significant.


Sepia officinalis; small-scale fisheries; catch and CPUE estimations; Gómez-Muñoz model; NW Spain

Full Text:



Anonymous. – 1998. Report of the working group on cephalopod fisheries and life history. ICES C.M. 1998/G: 7, 40 pp.

Arnaiz, R., E. Rodríguez, F.A. Quinteiro, R. Bañon, J.M. Campelos, F. Lamas, A. Gancedo, M. García and G. Costas. – 2002. La pesquería de Sepia (Sepia officinalis) con trasmallos en la ensenada de san Simón (Ría de Vigo) 1999-2000. Los Recursos Marinos de Galicia. Serie Técnica, 2.

Coelho, M.L. and C. Nunes. – 1989. The fishery of Sepia officinalis in Portugal. In: E. Boucaud-Camou (ed.), La Seiche, p. 348. Université de Caen, Caen.

Denis, V. and J.P. Robin. – 2001. Present status of the French Atlantic fishery for cuttlefish (Sepia officinalis). Fish. Res., 52: 11-22. doi:10.1016/S0165-7836(01)00227-2

Dunn, M.R. – 1999. Aspects of the stock dynamics and exploitation of cuttlefish, Sepia officinalis (Linnaeus, 1758), in the English Channel. Fish. Res., 40: 277-293. doi:10.1016/S0165-7836(98)00223-9

Durán-Neira, C. – 1991. Caladeros de pesca del litoral gallego. Fundación Caixa Galicia, A Coruña, Spain.

Freire, J. and A. García-Allut. – 2000. Socioeconomic and biological causes of management failures in European artisanal fisheries: the case of Galicia (NW Spain). Mar. Policy, 24: 375-384. doi:10.1016/S0308-597X(00)00013-0

Freire, J., C. Bernárdez, A. Corgos, L. Fernández, E. González- Gurriarán, M.P. Sampedro and P. Verísimo. – 2002. Management strategies for sustainable invertebrate fisheries in coastal ecosystems of Galicia (NW Spain). Aquat. Ecol., 36: 41-50. doi:10.1023/A:1013350723445

Gómez-Muñoz, V.M. – 1990. A model to estimate catches from a short fishery statistics survey. Bull. Mar. Sci., 46: 719-722.

Guerra, A. – 1989. The exploitation of cuttlefish. In: E. Boucaud- Camou (ed.), La Seiche, pp. 343-344. Université de Caen, Caen.

Guerra, A. – 2006. Ecology of Sepia officinalis. Vie Milieu, 56(2): 97-107.

Hoening, J.M., C.M. Jones, K.H. Pollock, D.S. Robson and D.L. Wade. – 1997. Calculation of catch rate and total catch in roving surveys of anglers. Biometrics, 53: 306-317. doi:10.2307/2533116

Jereb, P. and S. Ragonese. – 1989. The role played by Sepia officinalis Linnaeus, 1758 in the southern Sicilian fisheries. In: E. Boucaud-Camou (ed.), La Seiche, p. 349. Université de Caen, Caen.

Kirchner, C.H. and J.E. Beyer, 1999. Estimation of total catch of Silver Kob Argyrosomus inodorus by recreational shoreanglers in Namibia using a roving-roving creel survey. S. Afr. J. Mar. Sci., 21: 191-199.

Madelaine, B. and T. Aouab. – 1989. Cuttlefish trapping fishery on Calvados coasts. In: E. Boucaud-Camou (ed.), La Seiche, p. 350. Université de Caen, Caen.

Neis, B., D.C. Schneider, L. Felt, R.L. Haedrich, J. Fischer and J.A. Hutchings. – 1999. Fisheries assessment: what can be learned from interviewing resource users? Can. J. Fish. Aquat. Sci., 56: 1949-1963. doi:10.1139/cjfas-56-10-1949

Otero, J., F. Rocha, A.F. González, J. Gracia and A. Guerra. – 2005. Modelling artisanal coastal fisheries of Galicia (NW Spain) based on data obtained from fishers: the case of Octopus vulgaris. Sci. Mar., 69(4): 577-585.

Perry, R.I., C.J. Walters and J.A. Boutiller. – 1999. A framework for providing scientific advice for the management of new and developing invertebrate fisheries. Rev. Fish Biol. Fisher., 9: 125-150. doi:10.1023/A:1008946522213

Pollock, K.H., J.M. Hoening, C.M. Jones, D.S. Robson and C.J. Greene. – 1997. Catch rate estimation for roving and access point surveys. N. Am. J. Fish. Manag., 17: 11-19. doi:10.1577/1548-8675(1997)017<0011:CREFRA>2.3.CO;2

Rocha, F., J. Gracia, A.F. González, C.M. Jardón and A. Guerra. – 2004. Reliability of a model based on a short fishery statistics survey: application to the Northeast Atlantic monkfish fishery. ICES J. Mar. Sci., 61: 25-34. doi:10.1016/j.icesjms.2003.10.006

Royer, J., Pierce, G.J., Foucher, E. and J.P. Robin - 2006. The English Channel stock of Sepia officinalis: modelling variability in abundance and impact of the fishery. Fish. Res., 78: 96-106. doi:10.1016/j.fishres.2005.12.004

Simón, F., F. Rocha and A. Guerra. – 1996. The small-scale squid hand-jig fishery off the northwestern Iberian Peninsula: application of a model based on a short survey of fishery statistics. Fish. Res., 25: 253-263. doi:10.1016/0165-7836(95)00425-4

Tukey, J.W. – 1977. Exploratory Data Analysis. Addison-Wesley Series in Behavioural Sciences, Quantitative Methods, 16. Addison Wesley Publishing Company, Massachusetts, USA.

Wang, J., G.J. Pierce, P.R. Boyle, V. Denis, J.P. Robin and J.M. Bellido. – 2003. Spatial and temporal patterns of cuttlefish (Sepia officinalis) abundance and environmental influences – a case study using trawl fishery data in French Atlantic coastal, English Channel, and adjacent waters. ICES J. Mar. Sci., 60: 1149-1158. doi:10.1016/S1054-3139(03)00118-8

Xunta de Galicia. – 2000. Censo oficial de la flota pesquera de Galicia para 1999. Website:

Xunta de Galicia. – 2005. Estadísticas de capturas en Galicia. Datos por puerto, fecha y especie. Website:

Young, I.A.G., G.J. Pierce, J. Murphy, H.I. Daly and N. Bailey. – 2006. Application of the Gómez-Muñoz model to estimate catch and effort in squid fisheries in Scotland. Fish. Res., 78: 26-38. doi:10.1016/j.fishres.2005.12.006

Zar, J.H. – 1999. Biostatistical Analysis. Prentice Hall, New Jersey.

Copyright (c) 2006 Consejo Superior de Investigaciones Científicas (CSIC)

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Contact us

Technical support