Spatiotemporal patterns of catch and discards of the Israeli Mediterranean trawl fishery in the early 1990s: ecological and conservation perspectives


  • Dor Edelist Department of Maritime Civilizations and The Leon Recanati Institute for Maritime Studies, The Leon H. Charney School for Marine Sciences, Faculty of Natural Sciences, University of Haifa
  • Oren Sonin Department of Maritime Civilizations and The Leon Recanati Institute for Maritime Studies, The Leon H. Charney School for Marine Sciences, Faculty of Natural Sciences, University of Haifa - Ministry of Agriculture and Rural Development
  • Daniel Golani Department of Evolution, Systematics and Ecology, The Hebrew University of Jerusalem
  • Gil Rilov Israel Oceanographic and Limnological Research
  • Ehud Spanier Israel Oceanographic and Limnological Research



bottom-trawl, Israel, discards, catch composition, Lessepsian migration, fishery management


The spatiotemporal patterns of discards and catch composition of Israeli trawlers were examined using a 4-year (1990-1994), 324 haul dataset. Haul depth was found to be the main grouping variable for hauls, although significant seasonal differences were also found. 28.3% of the total catch was discarded, and there was a 40.1% discard percentage in shallow hauls. According to these figures, annual discards for the Israeli trawl fleet for the study period are estimated at ca. 440 to 700 t. Both the biomass and the number of discarded specimens peaked in summer, as well as the percentage of juvenile fish of commercial species. These findings suggest that a summer moratorium on trawling would reduce discards. The percentage of specimens of Indo-Pacific origin decreased from 51% in depths shallower than 37 m to 24% between 38 and 73 m, and 8% in deeper strata. Discards along the Israeli coast were comparable to those observed elsewhere in the Mediterranean. The findings presented here are the first quantitative account of fish community assemblages in the nearshore waters of the easternmost part of the Mediterranean, and thus provide valuable information for comparisons with more current datasets that are currently being assembled.


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Alsayes, A., S. Fattouh and S. Abu-Enin. – 2009. By-catch and discarding of trawl fisheries at the Mediterranean coast of Egypt. World J. Fish. Mar. Sci., 1: 199-205

Alverson, D.L., M.H. Freeberg. S.A. Murawski and J.G. Pope. – 1994. A global assessment of fisheries bycatch and discards. FAO Fish. Tech. Paper, 339: 233.

Ben-Tuvia, A. – 1973. Man-made changes in the eastern Mediterranean Sea and their effect on the fishery resources. Mar. Biol., 19: 197-203.

Ben-Yami, M. – 1955. 1954 – 1955: over-fishing or bad season? Fisher. Bull., Haifa 6: 10-14 [in Hebrew]

Clarke, K.R. and R.M. Warwick. – 2001. Change in marine communities: an approach to statistical analysis and interpretation, 2nd edition. PRIMER-E: Plymouth

Davies, R.W.D., S.J. Cripps, A. Nickson and G. Porter. – 2009. Defining and estimating global marine fisheries bycatch. Mar. Policy, 33: 661-672.

Demestre, M.S. de Juan, P. Sartor and A. Ligas. – 2008. Seasonal closures as a measure of trawling effort control in two Mediterranean trawling grounds: Effects on epibenthic communities. Mar. Pollut. Bull., 56: 1765-1773. PMid:18649897

D’Onghia G., R. Carlucci, P. Maiorano and M. Panza. – 2003. Discards from deep-water bottom trawling in the eastern–central Mediterranean Sea and effects of mesh size changes. J. Northwest Atl. Fish. Soc., 31: 245-261.

El-Mor, M., J.S. El-Etreby. S. Mohammad and M.R. Sapota. – 2002. A study on trash catch of the bottom trawl along Port-Said coast, Egypt. Oceanolog. Stud., 31: 45-55.

Esmeralda Costa, M., K. Erzini and T. Cerveira Borges. – 2008. Bycatch of crustacean and fish bottom trawl fisheries from southern Portugal (Algarve). Sci. Mar., 72(4): 801-814.

Galil, B.S. – 2007. Seeing red: alien species along the Mediterranean coast of Israel. Aquat. Invas., 2: 281-312.

Garcia, S. and A. Demetropoulos.- 1986. Management of Cyprus fisheries. FAO Fisheries Technical Paper, (250): 40 pp.

Golani, D. – 1993. The sandy shore of the Red Sea - launching pad for Lessepsian (Suez Canal) migrant fish colonizers of the eastern Mediterranean. J. Biogeog., 20(6): 579-585.

Golani, D., R. Reef-Motro, S. Ekshtein, A. Baranes and A. Diamant. – 2007. Ichthyofauna of the rocky coastal littoral of the Israeli Mediterranean, with reference to the paucity of Red Sea (Lessepsian) migrants in this habitat. Mar. Biol. Res., 3: 333-341.

Hall, M.A., D. L. Alverson and K. I. Metuzals. – 2000. By-Catch: problems and solutions. Mar. Pollut. Bull., 41(1-6): 204-219.

Jackson, J.B.C., M.X. Kirby, W.H. Berger, K.A. Bjorndal, L.W. Botsford, B.J. Bourque, R.H. Bradbury, R. Cooke, J. Erlandson, J.A. Estes, T.P. Hughes, S. Kidwell, C.B. Lange, H.S. Lenihan, J.M. Pandolfi, C.H. Peterson, R.S. Steneck, M.J. Tegner and R.R. Warner. – 2001. Historical overfishing and the recent collapse of coastal ecosystems. Science, 293: 629-637. PMid:11474098

Kelleher, K. – 2005. Discards in the world’s marine fisheries: an update. Rome: Food and Agriculture Organization of the United Nations, FAO; 2005. 131 pp.

Lleonart, J. and F. Maynou. – 2003. Fish stock assessments in the Mediterranean: state of the art. Sci. Mar., 67(Suppl. 1): 37-49.

Machias A., V. Vassilopoulou, D. Vatsos, P. Bekas, A. Kallianiotis, C. Papaconstantinou and N. Tsimenides. – 2001. Bottom trawl discards in the northeastern Mediterranean Sea. Fish. Res., 53: 181-195.

Pauli, D., V. Christensen, S. Guénette, T.J. Pitcher, U.R. Sumaila, C.J. Walters, R. Watson and D. Zeller. – 2002. Towards sustainability in world fisheries. Nature, 418: 689-695. PMid:12167876

Pisanty, S., O. Sonin and A. Alperovic. – 2000. Assessment of the influence of a summer trawling ban on the catch of the fishery. Technical Paper (in Hebrew). State of Israel, Ministry of Agriculture and Rural Development, Department of Fisheries. 17 pp.

Por, F.D. – 1989. The legacy of Tethys - an aquatic biogeography of the Levant. Dordrech, Kluwer 216 pp.

Rilov, G. and B.S. Galil. – 2009. Marine bioinvasions in the Mediterranean Sea - history, distribution and ecology. In: G. Rilov and J.A. Crooks (eds.), Biological invasions in marine ecosystems: ecological, management, and geographic perspectives, 3-11 pp. Springer-Verlag, Heidelberg.

Sacchi, J. 2008. The use of trawling nets in the Mediterranean. Problems and selectivity options. Options Mediterraneennes, B62: 87-96.

Sánchez P., M. Demestre and P. Martìn. – 2004. Characterization of the discards generated by bottom trawling in the northwestern Mediterranean. Fish. Res., 67: 71-80.

Sánchez P., P. Sartor, L. Recasens, A. Ligas, J. Martin, S. de Ranieri and M. Demestre. – 2007. Trawl catch composition during different fishing intensity periods in two Mediterranean demersal fishing grounds. Sci. Mar., 71(4): 765-773.

Sandler, A. and B. Herut. – 2000. Composition of clays along the continental shelf off Israel: contribution of the Nile versus local sources. Mar. Geol., 167: 339-354.

Scheinin, A.P. – 2010. The population of bottlenose dolphins (Tursiops truncatus), bottom trawl catch trends and the interaction between the two along the Mediterranean continental shelf of Israel. Ph.D. dissertation, Univ. Haifa, Israel.

Snovsky, G. and J. Shapiro – 1997. The fishery and aquaculture of Israel 1996 in figures. The state of Israel, Ministry of Agriculture – Department of Fisheries. 37pp.

Sonin O., E. Spanier, D. Levi, B. Patti, P. Rizzo and M.G. Andreoli. – 2007. Nanism (dwarfism) in fish: a comparison between red mullet Mullus barbatus from the southeastern and the central Mediterranean. Mar. Ecol. Prog. Ser., 343: 221-228.

Soykan H. and T. Kinacigil. – 2006. Bycatch associated with shrimp trawling in the Eastern Mediterranean (Ta?ucu Bay) In: Report of the ICES-FAO Working Group on Fishing Technology and Fish Behaviour (WGFTFB). Izmir, Turkey. 16.3: 50p.

Spanier E. and B.S. Galil. – 1991. Lessepsian migration a continuous biogeographical process. Endeavour, 15 (3): 102-106.

Stergiou, K.I., E. Christou and G. Petrakis. – 1997. Modelling and forecasting monthly fisheries catches: comparison of regression, univariate and multivariate time series methods. Fish. Res., 29: 55-95.

Sweeting C.J., F. Badalamenti, G. D’Anna, C. Pipitone and N.V. C. Polunin. – 2009. Steeper biomass spectra of demersal fish communities after trawler exclusion in Sicily. ICES. J. Mar. Sci., 66: 195-202.

Tsagarakis K., A. Machias, M. Giannoulaki, S. Somarakis and I. Karakassis. – 2008. Seasonal and temporal trends in metrics of fish community for otter-trawl discards in a Mediterranean ecosystem. ICES. J. Mar. Sci., 65(4): 539-550.

Wassenberg T.J., S. J. M. Blaber, C. Y. Burridge, D. T. Brewer, J. P. Salini and N. Grible. – 1997. The effectiveness of fish and shrimp trawls for the sampling of fish communities in tropical Australia. Fish. Res., 30: 241-251.




How to Cite

Edelist D, Sonin O, Golani D, Rilov G, Spanier E. Spatiotemporal patterns of catch and discards of the Israeli Mediterranean trawl fishery in the early 1990s: ecological and conservation perspectives. scimar [Internet]. 2011Dec.30 [cited 2023Nov.28];75(4):641-52. Available from:




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