Catch of pelagic hauls in Mediterranean acoustic surveys: Is it the same between day and night?

Authors

  • Athanassios Machias Hellenic Centre for Marine Research, Institute of Marine Biological Resources
  • Myrto M. Pyrounaki Hellenic Centre for Marine Research, Institute of Marine Biological Resources
  • Iole Leonori Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche
  • Gualtiero Basilone Istituto per l’Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche
  • Magdalena Iglesias Instituto Español de Oceanografia, Centro Oceanográfico de Baleares
  • Andrea De Felice Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche
  • Angelo Bonanno Istituto per l’Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche
  • Marianna Giannoulaki Hellenic Centre for Marine Research, Institute of Marine Biological Resources

DOI:

https://doi.org/10.3989/scimar.03656.21D

Keywords:

acoustic, pelagic hauls, day-night sampling, Mediterranean Sea, anchovy, sardine

Abstract


Fish sampling is a critical aspect of acoustic surveys, because it is directly related to the “transformation” of echo into species biomass and subsequently affects the accuracy of acoustic estimates. In the present study, we investigated the differences between day and night sampling in a) the catch composition through certain diversity indices and b) the length frequency distribution of anchovy and sardine using catch data of pelagic hauls collected from four different regions of the European Mediterranean waters. In addition, the possible bias in trawl efficiency due to sampling time and the possible error introduced in acoustic estimates were investigated. No statistically significant differences were found between day and night in any of the parameters examined. The results showed that a more flexible strategy can be adopted to reduce the duration and the cost of acoustic sampling for small pelagic species. The advantages and disadvantages of the two sampling strategies are discussed.

Downloads

Download data is not yet available.

References

Anonymous 2012. Harmonization of the acoustic data in the Mediterranean 2002-2006. Final Report. MARE/2009/09, 212 pp.

Azzali M., Buracchi G., Conti S., Gambetti S., Luna M. 1985. Relationship between the forms of pelagic fish distribution and nycthemeral periods. A tentative model of behaviour. Oebalia 11: 471-488.

Basilone G., Guisande C., Patti B., Mazzola S., Cuttitta A., Bonanno A., Kallianiotis A. 2004. Linking habitat conditions and growth in the European anchovy (Engraulis encrasicolus). Fish. Res. 68(1-3): 9-19. http://dx.doi.org/10.1016/j.fishres.2004.02.012

Clarke K.R., Warwick R.M. 1994. Change in marine communities: an approach to statistical analysis and interpretation. Natural Environment Research Council, UK

Doray M., Mahevas S., Trenkel V.M. 2010. Estimating gear efficiency in a combined acoustic and trawl survey, with reference to the spatial distribution of demersal fish. ICES J. Mar. Sci. 67: 668-676. http://dx.doi.org/10.1093/icesjms/fsp277

Fréon P, Misund O.E. 1999. Dynamics of Pelagic Fish Distribution and Behaviour: Effects on Fisheries and Stock Assessment. Blackwell Science Ltd, Oxford, 360 pp. PMid:10200286 PMCid:16356

Giannoulaki M., Machias A., Tsimenides N. 1999. Ambient luminance and vertical migration of the sardine Sardina pilchardus. Mar. Ecol. Prog. Ser. 178: 29-38. http://dx.doi.org/10.3354/meps178029

ICES 2005. Report of the Working Group on Fisheries Acoustics Science and Technology (WGFAST), 19-22 April 2005, Rome, Italy. ICES CM 2005/B:05, 57 pp.

ICES 2009. Report of the working group on anchovy and sardine (WGANSA). 15-20 June 2009, Copenhagen, Denmark. ICES CM 2009/ACOM:13.

Iglesias M., Carrera P., Muino R. 2003. Spatio-temporal patterns and morphological characterisation of multispecies pelagic fish schools in the North-Western Mediterranean Sea. Aquat. Living Resour. 16: 541-548. http://dx.doi.org/10.1016/j.aquliv.2003.07.003

Karakassis I., Smith C.J., Eleftheriou A. 1996. Performance of neutral model analysis in a spatio-temporal series of macrobenthic replicates. Mar. Ecol. Prog. Ser. 137: 173-179. http://dx.doi.org/10.3354/meps137173

MacLennan D., Fernandes P., Dalen J. 2002. A consistent approach to definitions and symbols in fisheries acoustics. ICES J. Mar. Sci. 59: 365-369. http://dx.doi.org/10.1006/jmsc.2001.1158

Masse J. 1996. Acoustic observations in the Bay of Biscay: Schooling, vertical distribution, species assemblages and behaviour. Sci. Mar. 60(2): 227-234.

SGMED 2009. Report of the SGMED-09-02 Working Group on the Mediterranean Part I. Scientific, Technical and Economic Committee for Fisheries (STECF), European Commission. In: Cardinale M, Cheilari A, Ratz HJ (eds.), 8-10 June 2009, Villasimius, Sardinia, Italy.

SGMED 2010. Report of the SGMED-10-02 Working Group on the Mediterranean Part I. Scientific, Technical and Economic Committee for Fisheries (STECF), European Commission. In: Cardinale M, Cheilari A, Ratz HJ (eds), 31 May–4 June 2010, Iraklion, Crete, Greece.

Simmonds E. J., MacLennan D.N. 2005. Fisheries Acoustics. Theory and Practice. Blackwell Publishing, Oxford, UK. 437 pp. http://dx.doi.org/10.1002/9780470995303

Stefanescu C., Rucabado J., Lloris D. 1992. Depth-size trends in western Mediterranean demersal deep-sea fishes. Mar. Ecol. Prog. Ser. 81: 205-213. http://dx.doi.org/10.3354/meps081205

Szczucka J. 2000. Acoustically measured, diurnal vertical migration of fish and zooplankton in the Baltic Seaseasonal variations. Oceanologia 42: 15-17.

Tsagarakis K., Giannoulaki M., Somarakis S., Machias A. 2012. Variability in positional, energetic and morphometric descriptors of European anchovy (Engraulis encrasicolus) schools related to patterns of diurnal vertical migration. Mar. Ecol. Prog. Ser. 446: 243-258. http://dx.doi.org/10.3354/meps09456

Woodhead P.M.J. 1966. The behaviour of fish in relation to light in the sea. Oceanogr. Mar. Biol. Ann. Rev. 4: 337-403.

Zar J.H. 1984. Biostatistical analysis. Prentice-Hall, Englewood-Cliffs, NJ, 718 pp. PMid:6436396

Zwolinski J., Morais A., Marques V., Stratoudakis Y., Fernandes P.G. 2007. Diel variation in the vertical distribution and schooling behaviour of sardine (Sardina pilchardus) off Portugal. ICES J. Mar. Sci. 64: 963-972. http://dx.doi.org/10.1093/icesjms/fsm075

Downloads

Published

2013-03-30

How to Cite

1.
Machias A, Pyrounaki MM, Leonori I, Basilone G, Iglesias M, De Felice A, Bonanno A, Giannoulaki M. Catch of pelagic hauls in Mediterranean acoustic surveys: Is it the same between day and night?. Sci. mar. [Internet]. 2013Mar.30 [cited 2024Mar.29];77(1):69-7. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1429

Issue

Section

Articles

Most read articles by the same author(s)