Scientia Marina, Vol 82, No S1 (2018)

Towards more selective Mediterranean trawl fisheries: are juveniles and trash excluder devices effective tools for reducing undersized catches?


https://doi.org/10.3989/scimar.04751.28A

Sergio Vitale
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0001-6063-4126

Giacomo Milisenda
Stazione zoologica Anton Dohrn, Lungomare Cristoforo Colombo, Italy
orcid http://orcid.org/0000-0003-1334-9749

Michele Gristina
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0003-3639-7655

Pasquale Baiata
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy

Sara Bonanomi
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0002-2236-9015

Francesco Colloca
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona - Dipartimento di Biologia e Biotecnologie “Charles Darwin”, Università di Roma, Italy
orcid http://orcid.org/0000-0002-0574-2893

Vita Gancitano
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0001-9623-6621

Danilo Scannela
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0001-7886-0316

Fabio Fiorentino
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0002-6302-649X

Antonello Sala
Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM), Consiglio Nazionale delle Ricerche (CNR), unit of Ancona, Italy
orcid http://orcid.org/0000-0001-7066-1152

Abstract


Mediterranean trawl fisheries are characterized by a critical combination of high fishing effort and low size at first capture for most commercial species. In this study we tested the use of sorting grids installed on bottom trawl nets to minimize the catch of undersized deep-water rose shrimp (Parapenaeus longirostris, DPS) and European hake (Merluccius merluccius, HKE). The catch of a traditional trawl net was compared with that obtained with the same net equipped with ad hoc designed juveniles and trash excluder devices (JTEDs) during an experimental survey. Three different JTEDs were tested: the first (G1-SM40) was built with a net of 40-mm square mesh; the second (G2-ST20) and third (G3-ST25) with vertical steel bars spaced 20 and 25 mm, respectively. The probability of retaining DPS and HKE by length class in trawl nets with and without JTED was analysed using generalized additive mixed models. With G1-SM40, the reduction of undersized individuals in the cod-end was about 60% and 44% for DPS and HKE, respectively. With G2-ST20, a 34% catch decrease of HKE individuals smaller than 20 cm total length was observed. A loss of marketable fractions of DPS was recorded with G1-SM40 (–25%) and G2-ST20 (30%). Finally, JTD G3-ST25 was efficient at reducing the catch of undersized specimens of DPS and HKE, but showed a higher loss of marketable fractions than the other JTEDs. Although further fishing trials would be required to maximize the sorting efficiency of the grids, the results obtained clearly indicated that grids can substantially reduce unwanted catches of undersized DPS and HKE in Mediterranean bottom trawl fisheries.

Keywords


sorting grids; JTED; Mediterranean trawl fisheries; Parapenaeus longirostris; Merluccius merluccius; trawl selectivity; Strait of Sicily

Full Text:


HTML PDF XML

References


Aydın C., Tosuno_lu Z. 2011. Evaluation of sorting grids for deep water rose shrimp (Parapenaeus longirostris) in the Eastern Mediterranean demersal trawl fishery. J. Appl. Ichthyol. 28: 102-106. https://doi.org/10.1111/j.1439-0426.2011.01897.x

Aydın C., Tokaç A., Aydın _., et al. 2011. Species selectivity in the Eastern Mediterranean demersal trawl fishery using grids to reduce non-target species. J. Appl. Ichthyol. 27: 61-66. https://doi.org/10.1111/j.1439-0426.2010.01605.x

Bahamon N., Sardà F., Suuronen. P. 2007. Selectivity of flexible size-sorting grid in Mediterranean multispecies trawl fishery. Fish. Sci. 73: 1231-1240.

Bellido J., Santos M., 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

Br_i_ J., Herrmann B., De Carlo F., et al. 2015. Selective characteristics of a shark-excluding grid device in a Mediterranean trawl. Fish Res. 172: 352-360.

Br_i_ J., Herrmann B., Sala A. 2017. Can a square-mesh panel inserted in front of the cod end improve size and species selectivity in Mediterranean trawl fisheries? Can. J. Fish. Aquat. Sci. 75: 704-713.

Caddy J.F. 1990. Options for the regulation of Mediterranean demersal fisheries. Nat. Res. Model. 4: 427-475. https://doi.org/10.1111/j.1939-7445.1990.tb00219.x

Carpentieri P., Colloca F., Ardizzone G. 2008. Daily ration and feeding activity of juvenile hake in the central Mediterranean Sea. J. Mar. Biol. Assoc. U.K. 88: 1493-1501. https://doi.org/10.1017/S0025315408001859

Colloca F., Cardinale M., Maynou F., et al. 2013. Rebuilding Medi- terranean fisheries: a new paradigm for ecological sustainabil- ity. Fish Fish. 14: 89-109. https://doi.org/10.1111/j.1467-2979.2011.00453.x

Colloca F., Garofalo G., Bitetto I., et al. 2015. The seascape of demersal fish nursery areas in the North Mediterranean Sea, a first step towards the implementation of spatial planning for trawl fisheries. PloS ONE 10: e0119590. https://doi.org/10.1371/journal.pone.0119590 PMid:25785737 PMCid:PMC4364973

Colloca F., Scarcella G., Libralato S. 2017. Recent Trends and Impacts of Fisheries Exploitation on Mediterranean Stocks and Ecosystems. Front. Mar. Sci. 4: 244. https://doi.org/10.3389/fmars.2017.00244

Dereli H., Aydin C., Kebapçio_lu T., et al. 2016. Selectivity of commercial and experimental cod-ends for the demersal trawl fishery of the deep-water rose shrimp, Parapenaeus longirostris (Lucas, 1846), in the Aegean Sea. Crustaceana 89: 477-493. https://doi.org/10.1163/15685403-00003532

Di Lorenzo M., Sinerchia M., Colloca F. 2018. The North sector of the Strait of Sicily: a priority area for conservation in the Mediterranean Sea. Hydrobiologia 821: 235-253. https://doi.org/10.1007/s10750-017-3389-7

Fiorentini L., Sala A., Hansen K., et al. 2004. Comparison between model testing and full-scale trials of new trawl design for Italian bottom fisheries. Fish. Sci. 70: 349-359. https://doi.org/10.1111/j.1444-2906.2004.00813.x

Fiorentino F., Ben Hadj Hamida O., Ben Meriem S., et al. 2013. Synthesis of information on some demersal crustaceans relevant for fisheries target species in the south-central Mediterranean Sea. GCP/RER/010/ITA/MSM-TD-32, MedSudMed Tech. Doc. 32: 1-120.

Fryer R.J., Zuur A.F., Graham N. 2003. Using mixed models to combine smooth size selection and catch-comparison curves over hauls. Can. J. Fish. Aquat. Sci. 60: 448-459. https://doi.org/10.1139/f03-029

Holst R., Revill A.S. 2009. A simple statistical method for catch comparison studies. Fish. Res. 95: 254-259. https://doi.org/10.1016/j.fishres.2008.09.027

Kaykaç H., Tokaç A., Özbilgin H. 2009. Selectivity of commercial, larger mesh and square mesh trawl cod-ends for deep water rose shrimp Parapenaeus longirostris (Lucas, 1846) in the Aegean Sea. Sci. Mar. 73: 597-604. https://doi.org/10.3989/scimar.2009.73n3597

Lleonart J., Maynou F. 2003. Fish stock assessments in the Mediterranean: State of the art. Sci. Mar. 67: 37-49. https://doi.org/10.3989/scimar.2003.67s137

Lucchetti A., Punzo E., Virgili M. 2016. Flexible Turtle Excluder Device (TED): an effective tool for Mediterranean coastal multispecies bottom trawl fisheries. Aquat. Living. Resour. 29: 201. https://doi.org/10.1051/alr/2016016

Maiorano L., Bartolino V., Colloca F., et al. 2009. Systematic conservation planning in the Mediterranean: a flexible tool for the identification of no-take marine protected areas. ICES J. Mar. Sci. 66: 137-146. https://doi.org/10.1093/icesjms/fsn148

Massutí B.E., Ordines F., Guijarro B. 2009. Efficiency of flexible sorting grids to improve size selectivity of the bottom trawl in the Balearic Islands (western Mediterranean), with comparison to a change in mesh cod-end geometry. J. Appl. Ichthyol. 25: 153-161. https://doi.org/10.1111/j.1439-0426.2009.01225.x

Maynou F., Gil M.D.M., Vitale S., et al. 2018. Fishers' perceptions of the European Union discards ban: perspective from south European fisheries. Mar. Policy 89: 147-153. https://doi.org/10.1016/j.marpol.2017.12.019

Milisenda G., Vitale S., Massi D., et al. 2017. Spatio-temporal composition of discard associated with the deep water rose shrimp fisheries (Parapenaeus longirostris, Lucas 1846) in the southcentral Mediterranean Sea. Med. Mar. Sci. 18: 53-63. https://doi.org/10.12681/mms.1787

Morrissey M.T., Almonacid S. 2005. Rethinking technology transfer. J. Food Eng. 67: 135-145. https://doi.org/10.1016/j.jfoodeng.2004.05.057

Orsi Relini L., Zamboni A., Fiorentino F., et al. 1997. Vulnerabilità luce dipendente del nasello (Merluccius merluccius) giovanile. Biol. Mar. Medit. 4: 262-268.

Özvarol Y. 2016. Size selectivity of sorting grid for eight fish species in the Gulf of Antalya, North eastern Mediterranean Sea. Iran. J. Ichthyol. 3: 294-303.

Özvarol Y., Bolat Y. 2017. Bottom trawl size selectivity methods in the Turkey. Sci. Pap. Ser. Manag., Econ. Engin. Agr. Rural Develop. 17: 259-262.

Pinello D., Gee J., Accadia P., et al. 2018. Efficiency of shallowand deep-water trawling in the Mediterranean and its implications for discard reduction. Sci. Mar. 82S1: 97-106.

Ragonese S., Zagra M., Di Stefano L., et al. 2001. Effect of cod-end mesh size on the performance of the deep-water bottom trawl used in the red shrimp fishery in the Strait of Sicily (Mediterranean Sea). Hydrobiologia 449: 279-291. https://doi.org/10.1023/A:1017564530716

Revill A. 2012. Survival of discarded fish. A rapid review of studies on discard survival rates. DG MARE A2. Request For Services Commitment No. S12.615631. Available at: http://nsrac.org/wp-content/uploads/2012/08/EU-discardsurvival-short-study-version-001.pdf

Russo T., Parisi A., Garofalo G., et al. 2014. SMART: A Spatially Explicit Bio-Economic Model for Assessing and Managing Demersal Fisheries, with an Application to Italian Trawlers in the Strait of Sicily. PLoS ONE 9: e86222. https://doi.org/10.1371/journal.pone.0086222 PMid:24465971 PMCid:PMC3900514

Sala A., Lucchetti A., Perdichizzi A., et al. 2015. Is square-mesh better selective than larger mesh? A perspective on the management for Mediterranean trawl fisheries. Fish. Res. 161: 182-190. https://doi.org/10.1016/j.fishres.2014.07.011

Sala A., Herrmann B., De Carlo F., et al. 2016. Effect of Cod-end Circumference on the Size Selection of Square-Mesh Codends in Trawl Fisheries. PLoS ONE 11: e0160354. https://doi.org/10.1371/journal.pone.0160354 PMid:27472058 PMCid:PMC4966963

Santiago J.L., Ballesteros M.A., Chapela R., et al. 2015. Is Europe ready for a results-based approach to fisheries management? The voice of stakeholders. Mar. Policy 56: 86-97. https://doi.org/10.1016/j.marpol.2015.02.006

Sardà F., Bahamón N., Sardà-Palomera F., et al. 2005. Commercial testing of a sorting grid to reduce catches of juvenile hake (Merluccius merluccius) in the western Mediterranean demersal trawl fishery. Aquat. Living Resour. 18: 87-91. https://doi.org/10.1051/alr:2005010

Savenkoff C., Savard L., Morin B., et al. 2006. Main prey and predators of northern shrimp (Pandalus borealis) in the northern Gulf of St. Lawrence during the mid-1980s, mid-1990s, and early 2000s. Can. Tech. R. Fish. & Aqua. Sci. 2639:1-28.

Sola I., Maynou F. 2018. Assessment of the relative catch performance of hake, red mullet and striped red mullet in a modified trawl extension with T90 netting. Sci. Mar. 82S1: 19-26.

Stergiou K.I., Moutopoulos D.K., Armenis G. 2009. Perish legally and ecologically: the ineffectiveness of the minimum landing sizes in the Mediterranean Sea. Fish. Manag. Ecol.16: 368-375. https://doi.org/10.1111/j.1365-2400.2009.00672.x

Suuronen P., Sardà F. 2007. By-catch reduction techniques in European fisheries: traditional methods and potential innovations. In: Kennelly S.J. (ed.), By-catch Reduction in the World's Fisheries, Springer, Dordrecht, pp. 37-74. https://doi.org/10.1007/978-1-4020-6078-6_3

Tokac A., Herrmann B., Aydın C., et al. 2014. Predictive models and comparison of the selectivity of standard (T0) and turned mesh (T90) codends for three species in the Eastern Mediterranean. Fish. Res. 150: 76-88. https://doi.org/10.1016/j.fishres.2013.10.015

Tsagarakis, K., Carbonell A., Br_i_ J., et al. 2017. Old Info for a New Fisheries Policy: Discard Ratios and Lengths at Discarding in EU Mediterranean Bottom Trawl Fisheries. Front. Mar. Sci. 4: 99.

Tsagarakis K., Nikolioudakis N., Papandroulakis N., et al. 2018. Preliminary assessment of discards survival in a multi-species Mediterranean bottom trawl fishery. J. Appl. Ichthyol. 34: 842-849. https://doi.org/10.1111/jai.13691

Vasilakopoulos P., Maravelias C.D., Tserpes G. 2014. The Alarming Decline of Mediterranean Fish Stocks. Curr. Biol. 24: 1643-1648. https://doi.org/10.1016/j.cub.2014.05.070 PMid:25017210

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

Vitale S., Enea M., Milisenda G., et al. 2018. Modelling the effects of more selective trawl nets on the productivity of European hake (Merluccius merluccius) and deep-water rose shrimp (Parapenaeus longirostris) stocks in the Strait of Sicily. Sci. Mar. 82S1: 199-208.

Wood S.N. 2006. Generalized additive models: an introduction with R. Chapman & Hall, Boca Raton, Florida, U.S.A., 416 pp. https://doi.org/10.1201/9781420010404

Zuur A.F., Ieno E.N., Smith G.M. 2007. Analysing Ecological Data. Springer-Verlag, New York, 672 pp. https://doi.org/10.1007/978-0-387-45972-1 PMCid:PMC2039845




Copyright (c) 2018 Consejo Superior de Investigaciones Científicas (CSIC)

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


Contact us scimar@icm.csic.es

Technical support soporte.tecnico.revistas@csic.es