Commercial catches and discards of a Mediterranean small-scale cuttlefish fishery: implications of the new EU discard policy

Authors

DOI:

https://doi.org/10.3989/scimar.04735.03B

Keywords:

small-scale fishery, trammel net, cuttlefish, discards, survival, Mallorca, western Mediterranean, fishers’ perception, landing obligation

Abstract


The cuttlefish (Sepia officinalis) trammel net fishery is one of the most important small-scale fisheries in the Mediterranean Sea. Here we describe the main catch, by-catch and discard patterns found in this fishery on Mallorca Island by onboard surveys of 1005 netting walls from 23 fishing trips. The number of items captured, their size and their subsequent use, i.e. kept for sale or discarded, were recorded. Furthermore, the immediate survival of the unwanted items (i.e. vitality state when the gear came on board) and the medium-term survival of a subsample were assessed. The cuttlefish was the dominant species in the commercial fraction of the catch, particularly during the fishing season peak (March). However, S. officinalis catches quickly decreased further into the season, with other high-value fish, such as Scorpaena scrofa, increasing in the commercial fraction of the catch. As species composition is continuously changing, it is often difficult to determine the main target species of this fishery. This strategy possibly complicates management but maximizes fishing revenue, which was an average of €175 per trip. With respect to discards, up to 104 different species were caught but not commercialized. The most abundant were Holothuria sp. and Torpedo marmorata. Their immediate survival was 100% and 20%, respectively. In both cases, the medium-term survival and the vitality status were high after seven days in monitored captivity. Therefore, in these cases, their immediate release to the sea should be promoted, given that they are exempt from the EU landing obligation. Interviews with fishers revealed that the perceived quantity of discards was lower than the amount recorded by the present study. Currently, just a small percentage (1.5%) of these discards will be affected by the landing obligation enforced by the new European discards ban.

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References

Batista M.I., Teixeira C.M., Cabral H.N. 2009. Catches of target species and bycatches of an artisanal fishery: The case study of a trammel net fishery in the Portuguese coast. Fish. Res. 100: 167-177. https://doi.org/10.1016/j.fishres.2009.07.007

Belcari P., Sartor P., Sanchez P., et al. 2002. Exploitation patterns of the cuttlefish, Sepia officinalis (Cephalopoda, Sepiidae), in the Mediterranean Sea. Bull. Mar. Sci. 71: 187-196.

Bellido J.M., Santos M.B., Pennino M.G., et al. 2011. Fishery discards and bycatch: solutions for an ecosystem approach to fisheries management? Hydrobiologia 670: 317-333. https://doi.org/10.1007/s10750-011-0721-5

Benoît H.P., Hurlbut T., Chassé J. 2010. Assessing the factors influencing discard mortality of demersal fishes using a semi-quantitative indicator of survival potential. Fish. Res. 106: 436-447. https://doi.org/10.1016/j.fishres.2010.09.018

Bilge G., Yapıcı S., Filiz H., et al. 2014. Weight-length relations for 103 fish species from the southern Aegean Sea, Turkey. Acta Ichthyol. Piscat. 44: 263-269. https://doi.org/10.3750/AIP2014.44.3.11

Boletzky S.V. 1983. Sepia officinalis. In: Boyle P.R. (ed.), Cephalopod Life Cycles, vol. I. Academic Press, pp. 31-52.

Borcard D., Gillet F., Legendre P. 2011. Numerical Ecology with R. Springer New York, USA, 306 pp. https://doi.org/10.1007/978-1-4419-7976-6

Borges T.C., Erzini K., Bentes L., et al. 2001. By-catch and discarding practices in five Algarve (southern Portugal) métiers. J. Appl. Ichthyol. 17: 104-114. https://doi.org/10.1046/j.1439-0426.2001.00283.x

Bradburn N.M., Rips L.J., Shevell S.K. 1987. Answering autobiographical questions: the impact of memory and inference on surveys. Science 236: 157-161. https://doi.org/10.1126/science.3563494 PMid:3563494

COM. 2002. Communication from the Commission to the Council and the European Parliament laying down a Community Action Plan for the conservation and sustainable exploitation of fishery resources in the Mediterranean Sea under the Common Fisheries. Commission of the European Communities, Brussels, 37 pp.

Catanese G., Hinz H., Gil M.M., et al. 2018. Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery. PeerJ 6: e4707. https://doi.org/10.7717/peerj.4707 PMid:29785340 PMCid:PMC5960583

Damalas D., Maravelias C.D., Osio G.C., et al. 2015. Historical discarding in Mediterranean fisheries: a fishers' perception. ICES J. Mar. Sci. 72: 2600-2608. https://doi.org/10.1093/icesjms/fsv141

FAO. 2003. Strategies for increasing the sustainable contribution of small-scale fisheries to food security and poverty alleviation. In: Report of the twenty-fifth session of the Committee on Fisheries. FAO, Italy, pp. 76-84.

Gil M.M., Palmer M., Rosselló R., et al. 2018. Mixed-fish commercial categories as a strategy for reducing discards from the small-scale fleet. Fish. Res. 205: 105-114. https://doi.org/10.1016/j.fishres.2018.04.011

Gonçalves J.M.S., Stergiou K.I., Hernando J.A., et al. 2007. Discards from experimental trammel nets in southern European small-scale fisheries. Fish. Res. 88: 5-14. https://doi.org/10.1016/j.fishres.2007.06.017

Hassan E. 2005. Recall bias can be a threat to retrospective and prospective research designs. Internet J. Epidemiol. 3: 1-7.

Heath M.R., Cook R.M., Cameron A.I., et al. Cascading ecological effects of eliminating fishery discards. Nature Comm. 5: 3893. ?lkyaz A.T., Metin G., Soykan O., et al. 2008. Length-weight relationship of 62 fish species from the Central Aegean Sea, Turkey. J. Appl. Ichthyol. 24: 699-702. https://doi.org/10.1111/j.1439-0426.2008.01167.x

Kelleher K. 2005. Discards in the world's marine fisheries. An update. FAO, Italy, 131 pp.

Keller S., Valls M., Hidalgo M., et al. 2014. Influence of environmental parameters on the life-history and population dynamics of cuttlefish Sepia officinalis in the western Mediterranean. Estuar. Coast. Shelf Sci. 145: 31-40. https://doi.org/10.1016/j.ecss.2014.04.016

Maynou F., Morales-Nin B., Cabanellas-Reboredo M., et al. 2013. Small-scale fishery in the Balearic Islands (W Mediterranean): A socio-economic approach. Fish. Res. 139: 11-17. https://doi.org/10.1016/j.fishres.2012.11.006

Merino G., Morales-Nin B., Maynou F., et al. 2008. Assessment and bioeconomic analysis of the Majorca (NW Mediterranean) trammel net fishery. Aquat. Living Resour. 21: 99-107. https://doi.org/10.1051/alr:2008027

Morales-Nin B., Grau A.M., Palmer M. 2010. Managing coastal zone fisheries: A Mediterranean case study. Ocean Coast. Manage. 53: 99-106. https://doi.org/10.1016/j.ocecoaman.2010.01.003

Morales-Nin B., Cardona-Pons F., Grau A.M., et al. 2013. Does angling activity influence consumer choices of fresh fish? Br. Food J. 115: 1054-1066. https://doi.org/10.1108/BFJ-04-2011-0096

Morey G., Moranta J., Massutí E., et al. 2003. Weight–length relationships of littoral to lower slope fishes from the western Mediterranean. Fish. Res. 62: 89-96. https://doi.org/10.1016/S0165-7836(02)00250-3

Oksanen J., Blanchet F.G., Kindt R., et al. 2014. Vegan: Community Ecology Package. R package version 2.2-0.

Palmer M., Tolosa B., Grau A.M., et al. 2017. Combining sale records of landings and fishers knowledge for predicting métiers in a small-scale, multi-gear, multispecies fishery. Fish. Res. 195: 59-70. https://doi.org/10.1016/j.fishres.2017.07.001

Pollock K.H., Pine W.E. 2007. The design and analysis of field studies to estimate catch-and-release mortality. Fish. Manage. Ecol. 14: 123-130. https://doi.org/10.1111/j.1365-2400.2007.00532.x

Quetglas A., Keller S., Massutí E. 2015. Can Mediterranean cephalopod stocks be managed at MSY by 2020? The Balearic Islands as a case study. Fish. Manage. Ecol. 22: 349-358. https://doi.org/10.1111/fme.12131

Quetglas A., Merino G., Ordines F., et al. 2016. Assessment and management of western Mediterranean small-scale fisheries. Ocean Coast. Manage. 133: 95-104. https://doi.org/10.1016/j.ocecoaman.2016.09.013

Reglero P., Morales-Nin B. 2008. Relationship between first sale price, body size and total catch of trammelnet target species in Majorca (NW Mediterranean). Fish. Res. 92: 102-106. https://doi.org/10.1016/j.fishres.2008.01.010

Salomon M. 2009. Recent European initiatives in marine protection policy: towards lasting protection for Europe's seas? Environ. Sci. Policy 12: 359-366. https://doi.org/10.1016/j.envsci.2008.12.008

Scientific, Technical and Economic Committee for Fisheries (STECF). 2017. The 2017 Annual Economic Report on the EU Fishing Fleet (STECF-17-12). Publications Office of the European Union.

Stergiou K.I., Moutopoulos D.K., Soriguer M.C., et al. 2006. Trammel net catch species composition, catch rates and métiers in southern European waters: A multivariate approach. Fish. Res. 79: 170-182. https://doi.org/10.1016/j.fishres.2006.03.003

Tiralongo F., Messina G., Lombardo B.M. 2018. Discards of elasmobranchs in a trammel net fishery targeting cuttlefish, Sepia officinalis Linnaeus, 1758, along the coast of Sicily (central Mediterranean Sea). Reg. Stu. Mar. Sci. 20: 60-63. https://doi.org/10.1016/j.rsma.2018.04.002

Tsagarakis K., Palialexis A., Vassilopoulou V. 2014. Mediterranean fishery discards: review of the existing knowledge. ICES J. Mar. Sci. 71: 1219-1234. https://doi.org/10.1093/icesjms/fst074

Tzanatos E., Somarakis S., Tserpes G., et al. 2007. Discarding practices in a Mediterranean small-scale fishing fleet (Patraikos Gulf, Greece). Fish. Manage. Ecol. 14: 277-285. https://doi.org/10.1111/j.1365-2400.2007.00556.x

Veiga P., Pita C., Rangel M., et al. 2016. The EU landing obligation and European small-scale fisheries: What are the odds for success? Mar. Policy 64: 64-71. https://doi.org/10.1016/j.marpol.2015.11.008

Viana M., McNally L., Graham N., et al. 2013. Ignoring discards biases the assessment of fisheries' ecological fingerprint. Biol. Lett. 9: 20130812. https://doi.org/10.1098/rsbl.2013.0812 PMid:24307530 PMCid:PMC3871369

Villasante S., Pierce G.J., Pita C., et al. 2016. Fishers' perceptions about the EU discards policy and its economic impact on small-scale fisheries in Galicia (North West Spain). Ecol. Econ. 130: 130-138. https://doi.org/10.1016/j.ecolecon.2016.05.008

Villegas-Ríos D., Alós J., Palmer M., et al. 2014. Life-history and activity shape catchability in a sedentary fish. Mar. Ecol. Progr. Ser. 515: 239-250. https://doi.org/10.3354/meps11018

Published

2018-12-30

How to Cite

1.
Gil M del M, Catanese G, Palmer M, Hinz H, Pastor E, Mira A, Grau A, Koleva E, Maria Grau A, Morales-Nin B. Commercial catches and discards of a Mediterranean small-scale cuttlefish fishery: implications of the new EU discard policy. scimar [Internet]. 2018Dec.30 [cited 2021Oct.17];82(S1):155-64. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1774

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