Volume 45, No. 1



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Status and diet of the European Shag (Mediterranean subspecies) Phalacrocorax aristotelis desmarestii in the Libyan Sea (south Crete) during the breeding season


Authors

STAVROS M. XIROUCHAKIS1, PANAGIOTIS KASAPIDIS2, ARIS CHRISTIDIS3, GIORGOS ANDREOU1, IOANNIS KONTOGEORGOS4 & PETROS LYMBERAKIS1

1Natural History Museum of Crete, University of Crete, P.O. Box 2208, Heraklion 71409, Crete, Greece (sxirouch@nhmc.uoc.gr)
2Institute of Marine Biology, Biotechnology & Aquaculture, Hellenic Centre for Marine Research (HCMR), P.O. Box 2214, Heraklion 71003, Crete, Greece
3Fisheries Research Institute, Hellenic Agricultural Organization DEMETER, Nea Peramos, Kavala 64007, Macedonia, Greece
4Department of Biology, University of Crete, P.O. Box 2208, Heraklion 71409, Crete, Greece


Received 21 June 2016, accepted 21 September 2016

Date Pubished: 2017/04/15
Date Online: 2017/02/28


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Citation

XIROUCHAKIS, S.M., KASAPIDIS, P., CHRISTIDIS, A., ANDREOU, G., KONTOGEORGOS, I. & LYMBERAKIS, P. 2017. Status and diet of the European Shag (Mediterranean subspecies) Phalacrocorax aristotelis desmarestii in the Libyan Sea (south Crete) during the breeding season. Marine Ornithology 45: 1-9.


Keywords: breeding biology, diet, Gavdos Island, European Shag, Mediterranean subspecies


Abstract

During 2010-2012 we collected data on the population status and ecology of the European Shag (Mediterranean subspecies) Phalacrocorax aristotelis desmarestii on Gavdos Island (south Crete), conducting boat-based surveys, nest monitoring, and diet analysis. The species' population was estimated at 80-110 pairs, with 59% breeding success and 1.6 fledglings per successful nest. Pellet morphological and genetic analysis of otoliths and fish bones, respectively, showed that the shags' diet consisted of 31 species. A total of 4 223 otoliths were identified to species level; 47.2% belonged to sand smelts Atherina boyeri, 14.2% to bogues Boops boops, 11.3% to picarels Spicara smaris, and 10.5% to damselfishes Chromis chromis. Our results revealed that, during the breeding season, the European Shag feeds mainly on small demersal species that are of low commercial value, posing no significant threat to the conduct of local fisheries.


References

Aebischer, N.J., Potts, G.R. & Coulson, J.C. 1995. Site and mate fidelity of Shags Phalacrocorax aristotelis at two British colonies. Ibis 137: 19-28.

Aebischer, N.J. & Wanless, S. 1992. Relationships between colony size, adult non-breeding and environmental conditions for Shags Phalacrocorax aristotelis on the Isle of May, Scotland. Bird Study 39: 43-52.

Aguilar, J.S. & Fernandez, G. 1999. Species action plan for the Mediterranean shag Phalacrocorax aristotelis desmarestii in Europe. Cambridge, UK: BirdLife International.

AL-ISMAIL, S., McMINN, M., TUSET, V-M., LOMBARTE, A. & ALCOVER, J-A. 2013. Summer diet of European Shags Phalacrocorax aristotelis desmarestii in southern Mallorca. Seabirds 26: 8-23.

Barrett, R.T., Røv, N., Loen, J. & Montevecchi, W.A. 1990. Diets of shags Phalacrocorax aristotelis and cormorants P. carbo in Norway and possible implications for gadoid stock recruitment. Marine Ecology Progress Series 66: 205-218.

BARRETT, R.T. 1991. Shags (Phalacrocorax aristotelis L.) as potential samplers of juvenile saithe (Pollachius virens (L.)) stocks in northern Norway. Sarsia 76: 153-156.

BAZIN, N. & IMBERT, M. 2012. Mediterranean Shag Phalacrocorax aristotelis desmarestii: Updated state of knowledge and conservation of the nesting populations of the Mediterranean Small Islands. Initiative PIM. 

Bearhop, S., Thompson, D.R., Waldron, S., Russel, I.C., Alexander, G. & Furness, R.W. 1999. Stable isotopes indicate the extent of freshwater feeding by cormorants Phalacrocorax carbo shot at inland fisheries in England. Journal of Applied Ecology 36: 75-84.

BERDALET, E., FLEMING, L., GOWEN, R., ET AL. 2015. Marine harmful algal blooms, human health and wellbeing: challenges and opportunities in the 21st century. Journal of the Marine Biological Association of the United Kingdom 96: 61-91.

Bibby, C.J., Burges, N.D., Hill, D.A. & Mustoe, S. 2000. Bird Census Techniques. Cambridge, MA: Academic Press Inc.

BirdLife International. 2004. Birds in Europe: Population Estimates, Trends and Conservation Status. Cambridge, UK: BirdLife International.

Bolduc, F. & Desbiens, A. 2011. Delineating distance intervals for ship-based seabird surveys. Waterbirds 34: 253-257.

Both, C. & Visser, M.E. 2005. The effect of climate change on the correlation between avian life-history traits. Global Change Biology 11: 1606-1613. 

BRICHETTI, P., DE FRANCESCHI, P. & BACCETTI, N. 1992. Fauna d'Italia. Aves I, Gaviidae–Phasianidae: 99–120. Bologna, Italy: Edizioni Calderini.

Camphuysen, C.J. (Ed.) 2005. Interactions between the marine environment, predators, and prey: implications for sustainable sandeel fisheries. IMPRESS Final Report Project# Q5RS-2000-30864. Texel, Netherlands: Royal Netherlands Institute for Sea Research. 

CAMPHUYSEN, C.J. & Garthe, S. 2004. Recording foraging seabirds at sea standardized recording and coding of foraging behaviour and multi-species foraging associations. Atlantic Seabirds 6: 1-32. 

CHILVERS, B.L., BAKER, G.B., HISCOCK, J.A., McCLELLAND, P.J., HOLDSWORTH, M. & JENSZ, K. 2015. Comparison of breeding population survey methods for the Auckland Island shag (Phalacrocorax colensoi). Polar Biology 38: 1847-1852.

Council OF THE EUROPEAN UNION. 2006. Council Regulation (EC) No 1967/2006 of 21 December 2006 concerning management measures for the sustainable exploitation of fishery resources in the Mediterranean Sea, amending Regulation (EEC) No 2847/93 and repealing Regulation (EC) No 1626/94. Official Journal L 409, 30.12.2006, pp. 11-85.

COWX, I.G. (Ed.) 2003. Interactions Between Fish and Birds: Implications for Management. Oxford, UK: Blackwell.

CRAMP, S. & SIMMONS, K.E.L. 1980. The Birds of the Western Palearctic. Volume II. Oxford, UK: Oxford University Press.

COSOLO, M., PRIVILEGGI, N., CIMADOR, B. & SPONZA, S. 2011. Dietary changes of Mediterranean Shags Phalacrocorax aristotelis desmarestii between the breeding and post-breeding seasons in the upper Adriatic Sea. Bird Study 58: 461-472.

Dariusz, J. 2011. The influence of climate conditions on breeding phenology of the grey heron Ardea cinerea L. in northern Poland. Polish Journal of Ecology 59: 179-192. 

DAUNT, F., WANLESS, S., HARRIS, M.P., MONEY, L. & MONAGHAN, P. 2007. Older and wiser: improvements in breeding success are linked to better foraging performance in European shags. Functional Ecology 21: 561-567.

Deagle, B.E., Kirkwood, R. & Jarman, S.N. 2009. Analysis of Australian fur seal diet by pyrosequencing prey DNA in faeces. Molecular Ecology 18: 2022-2038.

Digger, J. & Hulka, S. 2011. Lewis wave array year 1 bird surveys technical report. Appendix 10.1. Glassel, UK: Natural Research Projects Ltd.

DIMITRIU, H., BERTACHTAS, H., KARAOUZAS, I., SKOULIKIDIS, N., KOLOMPARH, E., MOUSOULIS, H. & DIAPOULIS, A. 2006. Study of human-induced pressures and soil and water quality in Mediterranean temporary ponds in western Crete. Technical Report LIFE04NAT/GR/000105: Actions for the conservation of the Mediterranean temporary ponds in Crete. Athens, Greece: Hellenic Center for Marine Research/ Institute of Marine Biological Resources & Inland Waters.

DEL HOYO, J., ELLIOT, A. & SARGATAL, J. 1992. Handbook of the Birds of the World. Vol. 1: Ostrich to Ducks. Barcelona, Spain: Lynx Editions.

DRECHSEL, F. 2012. Spatio-temporal distribution and behaviour of three common seabird species in Laganas gulf and Argassi (SE Zakynthos, Ionian Sea, western Greece). MSc thesis. Liège, Belgium: University of Liège.

Duffy, D.C. & Laurenson, L.J.-B. 1983. Pellets of Cape cormorants as indicators of diet. Condor 85: 305-307.

Duinevelda, G.C.A., Tselepides, A., Witbaard, R., ET AL. 2000. Benthic–pelagic coupling in the oligotrophic Cretan Sea. Progress in Oceanography 46: 457-480.

Dunshea, G. 2009. DNA-based diet analysis for any predator. PLoS ONE 4: e5252. doi:10.1371/journal.pone.0005252.

Granadeiro, J.P. & Silva, M.A. 2000. The use of otoliths and vertebrae in the identification and size-estimation of fish in predator-prey studies. Cybium 24: 383-393.

Greenstreet, S.P.R., Morgan, R.I.G., Barnett, S. & Redhead, P. 1993. Variation in the numbers of shags, Phalacrocorax aristotelis, and common seals, Phoca vitulina, near the mouth of an Atlantic salmon, Salmo salar, river at the time of the smolt run. Journal of Animal Ecology 62: 565-576.

Grémillet, D., Argentin, G., Schulte B. & Culik, B.M. 1998. Flexible foraging techniques in breeding cormorants Phalacrocorax carbo and shags Phalacrocorax aristotelis: benthic or pelagic feeding? Ibis 140: 113-119.

Guyot, I. 1993. Breeding distribution and number of Shag (Phalacrocorax aristotelis desmarestii) in the Mediterranean. In: Aguilar, J.S., Monabailliu, X. & Paterson, A.M. (Eds.) Estatus y Conservación de Aves Marinas. Actas del II Simposio MEDMARAVIS. Madrid, Spain: Sociedad Española de Ornitologia. pp. 37-45.

Harris, M.P. & Wanless, S. 1991. The importance of the lesser sandeel Ammodytes marinus in the diet of the shag Phalacrocorax aristotelis. Ornis Scandinavica 22: 375–382.

HANDRINOS, G. 1993. Midwinter numbers and distribution of Cormorants and Pygmy cormorants in Greece. In: AGUILAR, J.S., MONABAILLIU, X. & PATERSON, A.M. (Eds.) Proceedings of the 2nd Mediterranean Seabird Symposium Status and Conservation of Seabirds — Ecogeography and Mediterranean Action Plan. Calvia, Spain: Sociedad Española de Ornitologia and MEDMARAVIS. pp. 135-147.

handrinos, G. & Akriotis, T. 1997. The Birds of Greece. London: Helm–A & C Black Ltd.

Harris, M.P. & Wanless, S. 1993. The diet of Shag Phalacrocorax aristotelis during the chick-rearing period assessed by three methods. Bird Study 40: 135-139.

HILLERSØY, G. 2011. Annual variation in the diet of the European Shag (Phalacrocorax aristotelis) at Sklinna, Central Norway, and possible relationship between reproduction and abundance of year class 1-saithe in the diet. MSc thesis. Oslo, Norway: Norwegian University of Life Sciences.

IGNATIADES, L. 1998. The productive and optical status of the oligotrophic waters of the Southern Aegean Sea (Cretan Sea), Eastern Mediterranean. Journal of Plankton Research 20: 985-995.

JARMAN, S.N., GALES, N.J., TIERNEY, M., GILL, P.C. & ELLIOTT, N.G. 2002. A DNA-based method for identification of krill species and its application to analyzing the diet of marine vertebrate predators. Molecular Ecology 11: 2679-2690. 

Johnson, C. & KROHN, W. 2001. The importance of survey timing in monitoring breeding seabird numbers. Waterbirds 24: 22-33.

Johnson, J. 2002. Spatial and predictive foraging models for gray bats in northwest Georgia and a comparison of two acoustical bat survey techniques. MSc thesis. Morgantown, West Virginia: Division of Forestry, College of Agriculture, Forestry & Consumer Sciences, West Virginia University.

Johnstone, I.G., Harris, M.P., Wanless, S. & Graves, J.A. 1990. The usefulness of pellets for assessing the diet of adult Shags Phalacrocorax aristotelis. Bird Study 37: 5-11.

KARRIS, G., FRIC, J., KITSOU, Z., KALFOPOULOU, J., GIOKAS, S., SFENTHOURAKIS, S. & POIRAZIDIS, K. 2013. Does by-catch pose a threat for the conservation of seabird populations in the southern Ionian Sea (eastern Mediterranean)? A questionnaire-based survey of local fisheries. Mediterranean Marine Science 14: 19-25.

Katzner, T.E., Bragin, E.A., Knick, S.T. & Smith, A. 2006. Spatial structure in diet of imperial eagles Aquila heliaca in Kazakhstan. Journal of Avian Biology 37: 594-600.

Kees, C.J., Garthe, C. & Garthe, S. 2004. Recording foraging seabirds at sea: standardized recording and coding of foraging behaviour and multi-species foraging associations. IMPRESS internal working document. European Union Project# Q5RS-2000-30864.

KIRBY, J.S., HOLMES, J.S., & SELLERS, R.M. 1996. Cormorants Phalacrocorax carbo as fish predators: an appraisal of their conservation and management in Great Britain. Biological Conservation 75: 191-199.

Kotzerka, J., Hatch, S.A. & Garthe, S. 2011. Evidence for foraging-site fidelity and individual foraging behavior of pelagic cormorants rearing chicks in the Gulf of Alaska. Condor 113: 80–88.

Lilliendahl, K. & Solmundsson, J. 2006. Feeding ecology of sympatric European shags Phalacrocorax aristotelis and great cormorants P. carbo in Iceland. Marine Biology 149: 979-990.

Martin, J.I. 2006. Fisheries in Greece. Internal Note IPOL/B/PECH/NT/2006_02. Brussels, BL: European Parliament, Directorate-General for Internal Policies of the Union.

Maguire, G., Ramp, D. & Coulson, G. 2006. Foraging behaviour and dispersion of eastern grey kangaroos (Macropus giganteus) in an ideal free framework. Journal of Zoology 268: 261–269.

Mills, D. 1969. The food of the shag in Loch Ewe, Ross-shire. Scottish Birds 5: 264-268.

Mitchell, I. Newton, S.F., Ratcliffe, N. & Dunn, T. (Eds.) 2004. Seabird Populations of Britain and Ireland: Results of the Seabird 2000 Census (1998–2002). London, UK: T & A.D. Poyser.

MORAT, F., MANTE, A., DRUNAT, E., DABAT, J., BONHOMME, P., HARMELIN-VIVIEN, M. & LETOURNEUR, Y. 2011. Diet of the Mediterranean European shag, Phalacrocorax aristotelis desmarestii, its ecological significance and interaction with local fisheries in the Riou Archipelago (Marseilles, France). Vie et Milieu 61: 77-86.

MORAT, F., MANTE, A., DRUNAT, E., DABAT, J., BONHOMME, P., HARMELIN-VIVIEN, M. & LETOURNEUR, Y. 2014. Diet of Mediterranean European shag, Phalacrocorax aristotelis desmarestii, in a northwestern Mediterranean area: a competitor for local fisheries? Scientific Report Port-Cros National Park 28: 113-132.

MURRAY, B.G., JR. 2000. Measuring annual reproductive success in birds. Condor 102: 470-473.

Nelson, J.B. 2005. Pelicans, Cormorants and Their Relatives. Pelecanidae, Sulidae, Phalacrocoracidae, Anhingidae, Fregatidae, Phaethontidae. Oxford, U.K.: Oxford University Press.

Notti, E., BrˇCi´C, J., De Carlo, F., Herrmann, B., Lucchetti, A., Virgili, M. & Sala, A. 2016. Assessment of the relative catch performance of a surrounding net without the purse line as an alternative to a traditional boat seine in small-scale fisheries, marine and coastal fisheries. Dynamics, Management and Ecosystem Science 8: 81-91. 

OLIGO Primer Analysis Software Version 7. 2010. Cascade, CO: Molecular Biology Insights, Inc. [Available online at: http://oligo.net/. Accessed 23 November 2016]. 

Papaconstantinou, C. & Farrugio, H. 2000. Fisheries in the Mediterranean. Mediterranean Marine Science 1: 5-18.

Pompanon, F., Deagle, B.E., Symondson, W.O.C., Brown, D.S., Jarman, S.N. & Taberlet, P. 2012. Who is eating what: diet assessment using next generation sequencing. Molecular Ecology 21: 1931-1950.

QGIS Development Team 2014. QGIS Geographic Information System. Open Source Geospatial Foundation Project. [Available online at: http://www.qgis.org/. Accessed 23 November 2016.]

Snow, B. 1960. The breeding biology of the shag Phalacrocorax aristotelis on the island of Lundy, Bristol Channel. Ibis 102: 554-575.

SNOW, D.W. & PERRINS, C.M. 1998. The Birds of the Western Palearctic, Vol. 1: Non-Passerines. Oxford, UK: Oxford University Press.

SAENZ, B. & THAYER, J. 2007. Evidence of double-clutching by Brandt's cormorants on Alcatraz island, California. Western Birds 38: 47-51.

Sponza, S., Cimadro, B., Cosolo, M. & Ferrero, E.A. 2010. Diving costs and benefits during post-breeding movements of the Mediterranean shag in the North Adriatic Sea. Marine Biology 157: 1203-1213.

SantaLucia, J., JR. 2007. Basic Principles and Software for PCR Primer Design: Physical Principles and Visual-OMP Software for Optimal PCR Design. In: Yuryev A. (Ed.) Methods in Molecular Biology. Vol. 402: PCR Primer Design. Totowa, NJ: Humana Press Inc.

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

Tasker, M.L., Jones, P.H., Dixon, T.J. & Blake, B.F. 1984. Counting seabirds at sea from ships: a review of methods employed and a suggestion for a standardized approach. Auk 101: 567-577.

TAYLOR, G.A. 2000. Action plan for seabird conservation in New Zealand. Part A: threatened species. Threatened species occasional publication No. 16. Wellington, NZ: Department of Conservation.

THANOU, E. 2013. Breeding ecology and genetic structure of the European shag (Phalacrocorax aristotelis L. 1761) in the Aegean. PhD thesis. Patras, Greece: Department of Biology, University of Patras (in Greek).

THANOU, E., CHRISTIDIS, A., GIOKAS, S., SFENTHOURAKIS, S. & FRAGUEDAKIS-TSOLIS, S. 2010. Elements of breeding biology and estimation of reproduction success in a N. Aegean colony of the seabird Phalacrocorax aristotelis desmarestii. [poster] 11th International Congress on the Zoogeography, Ecology and Evolution of Eastern Mediterranean (ICZEGAR), 21–25 October. Heraklion, Greece: Hellenic Zoological Society.

TSERPES, G. & PERISTERAKI, P. 2002. Trends in the abundance of demersal species in the southern Aegean Sea. Scientia Marina 66: 243-252.

VELANDO, A. & FREIRE, J. 1999. Intercolony and seasonal differences in the breeding diet of European shags on the Galician coast (NW Spain). Marine Ecology Progress Series 188: 225-236.

VELANDO, A. & FREIRE, J. 2002. Population modelling of European shags (Phalacrocorax aristotelis) at their southern limit: conservation implications. Biological Conservation 107: 59-69.

VELANDO, A., MUNILLA, I. & LEYENDA, P. M. 2005. Short-term indirect effects of the ‘Prestige' oil spill on European shags: changes in availability of prey. Marine Ecology Progress Series 302: 263-274.

Walsh, P.M., Halley, D.J., Harris, M.P., del Nevo, A., Sim, I.M.W. & Tasker, M.L. 1995. Seabird monitoring handbook for Britain and Ireland. JNCC/RSPB/ITE/Seabird Group. Peterborough, UK: Seabird Group.

Wanless, S. & Harris, M.P. 2004. European Shag Phalacrocorax aristotelis. In: Mitchell, P.I., Newton, S.F., Ratcliffe, N. & Dunn, T.E. (Eds.) Seabird Populations of Britain and Ireland. London, UK: T. & A.D. Poyser. 

Wanless, S. & Harris, M.P. 1997. Phalacrocorax aristotelis Shag. BWP Update 1: 3-13.

Wanless, S., Burger, A.E. & Harris, M.P. 1991. Diving depths of Shags Phalacrocorax aristotelis breeding on the Isle of May. Ibis 133: 37-42.

WANLESS, S., HARRIS, M.P. & MORRIS, J.A. 1991. Foraging range and feeding locations of shags Phalacrocorax aristotelis during chick rearing. Ibis 133: 30-36. 

Wanless, S., Harris, M.P., Burger, M.E. & Buckland, S.T. 1997. Use of time-at-depth recorders for estimating depth and diving performance of European Shags. Journal of Field Ornithology 68: 547-561.

Watanuki, Y., Daunt, F., Takahashi, A., Newell, M., Wanless, S., Satom, K. & Miyazaki, N. 2008. Microhabitat use and prey capture of a bottom-feeding top predator, the European Shag, shown by camera loggers. Marine Ecology Progress Series 356: 283-293.

Wesołowski, T. & Maziarz, M. 2009. changes in breeding phenology and performance of Wood Warblers Phylloscopus sibilatrix in a primeval forest: a thirty-year perspective. Acta Ornithologica 44: 69-80. 

White, G. & Garrot, A. 1990. Analysis of Wildlife Radio-Tracking Data. London, UK: Academic Press. 

Zenetos, A., Siokou-Frangou, I., Gotsis-Skretas, O. & Groom, S. 2002. Seas Around Europe: the Mediterranean Sea: Blue Oxygen-Rich, Nutrient-Poor Waters. Europe's Biodiversity: Biogeographical Regions and Seas series. Copenhagen, Denmark: European Environment Agency. 

Žydelis, R., SMALL, C. & FRENCH, G. 2013. The incidental catch of seabirds in gillnet fisheries: a global review. Biological Conservation 162: 76-88. 


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