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Evaluating impacts of shellfish and baitworm digging on bird populations: short-term negative effects on the availability of the mudsnail Hydrobia ulvae to shorebirds

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Abstract.

Many shorebird populations show evidence of declines. To identify the causes is a key issue in developing comprehensive shorebird conservation plans. In coastal areas, shorebirds are vulnerable to effects of shellfish and baitworm digging, including reduction of the food supply. The mudsnail Hydrobia ulvae is often reported to be the dominant inhabitant of intertidal mudflats, and is common in the diet of migrating and wintering shorebirds. This prosobranch mollusc lives at or just below the surface of intertidal mudflats, so it might be directly damaged and killed or buried within the mud by hand diggers. We studied the short-term effects of digging by hand on the availability of mudsnail to shorebirds. Twenty centimetres deep core samples were collected from undisturbed and recently disturbed intertidal mud. The total mudsnail density and biomass per core sample was similar in disturbed and undisturbed mud. However, mudsnail density and biomass were significantly lower in disturbed mud than in undisturbed mud when only the upper five centimetres of the mud were compared. If only the mudsnails found in this surface layer are potentially available for shorebirds, the available mudsnail density and biomass fraction for shorebirds had decreased by 62.6 ± 11.4% and 75.7 ± 7.2% in disturbed mud, respectively. The potential impact of this decreasing mudsnail fraction on shorebirds is addressed.

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References

  1. Atkinson, P.W., Clark, N.A., Bell, M.C., Dare, P.J., Clark, J.A., Ireland, P.L. (2003) "Changes in commercially fished shellfish stocks and shorebirds populations in the WashEngland" Biological Conservation 114: 127-141

    Article  Google Scholar 

  2. Cabral, J.A., Pardal, M.A., Lopes, R.J., Múrias, T., Marques, J.C. (1999) "The impact of macroalgal blooms on the use of intertidal area and feeding behaviour of waders (Charadrii) in the Mondego estuary (west Portugal)" Acta Oecologica 20: 417-427

    Article  Google Scholar 

  3. Camphuysen, C.J., Ens, B.J., Heg, D., Hulscher, J.B., Vandermeer, J., Smit, C.J. (1996) "Oystercatcher Haematopus ostralegus winter mortality in the Netherlands: the effect of severe weather and food supply" Ardea 84: 469-492

    Google Scholar 

  4. Cardoso, P.G., Lillebo, A.I., Pardal, M.A., Ferreira, S.M., Marques, J.C. (2002) "The effect of different primary producers on Hydrobia ulvae populations dynamics: a case study in a temperate intertidal estuary" Journal of Experimental Marine Biology and Ecology 277: 173-195

    Article  Google Scholar 

  5. Cayford, J. (1993) "Wader disturbance: a theoretical overview" Wader Study Group Bulletin 68: 3-5

    Google Scholar 

  6. Chandrasekara, W.U., Frid, C.L.J. (1998) "A laboratory assessment of the survival and vertical movement of two epibenthic gastropod species, Hydrobia ulvae (Pennant) and Littorina littorea (Linnaeus), after burial in sediment" Journal of Experimental Marine Biology and Ecology 221: 191-207

    Article  Google Scholar 

  7. De Boer, W.F., Longamane, F.A. (1996) "The exploitation of intertidal food resources in Inhaca Bay, Mozambiqueby shorebirds and humans" Biological Conservation 78: 295-303

    Article  Google Scholar 

  8. Goss-Custard, J.D., Verbonen, N. (1993) "Disturbance and feeding shorebirds on the Exe estuary" Wader Study Group Bulletin 68: 59-66

    Google Scholar 

  9. Goss-Custard, J.D., Stillman, R.A., West, A.D., McGrorty, S., Durell, S.E.A. Le V. dit, Caldow, R. (2000) "The role of behavioural models in predicting the ecological impact of harvesting" In: Gosling, L.M., Sutherland, W.J. Behaviour and Conservation. Cambridge University Press, Cambridge, pp 65-82

    Google Scholar 

  10. Ferns, P.N., Rostron, D.M., Siman, H.Y. (2000) "Effects of mechanical cockle harvesting on intertidal communities" Journal of Applied Ecology 37: 464-474

    Article  Google Scholar 

  11. Huxham, M., Raffaelli, D., Pike, A.W. (1995) "The effect of larval trematodes on the growth and burrowing behaviour of Hydrobia ulvae (gastropoda: prosobranchia) in the Ythan estuary, north-east Scotland" Journal of Experimental Marine Biology and Ecology 185: 1-17

    Article  Google Scholar 

  12. International Wader Study Group (2003) "Waders are declining worldwide. Conclusions from the 2003 International Wader Study Group ConferenceCádiz, Spain" Wader Study Group Bulletin 101/102: 8-12

    Google Scholar 

  13. Lambeck, R.H.D., Goss-Custard, J.D., Triplet, P. (1996) "Oystercatchers and man in the coastal zone" In: Goss-Custard, J.D. The Oystercatcher: From Individual to Populations. Oxford University Press, OxfordUK, pp 289-326

    Google Scholar 

  14. Masero, J.A. (1998) Obtención de recursos tróficos por limícolas (Aves: Charadrii) en fangos intermareales y salinas adyacentes en el Parque Natural de la Bahía de Cádiz (SO España). Universidad de Cádiz, Spain

    Google Scholar 

  15. Masero, J.A., Pérez-Hurtado, A., Castro, M., Arroyo, G.M. (2000) "Complementary use of intertidal mudflats and adjacent salinas by foraging waders" Ardea 88: 179-191

    Google Scholar 

  16. Masero, J.A., Pérez-Hurtado, A. (2001) "Importance of the supratidal habitats for maintaining overwintering shorebird populations: how Redshanks use tidal mudflats and adjacent saltworks in southern Europe" Condor 103: 21-30

    Article  Google Scholar 

  17. Moreira, F. (1994) "Diet and feeding rates of knots Calidris canutus in the Tagus estuary (Portugal)" Ardea 82: 133-136

    Google Scholar 

  18. Moreira, F. (1996) "Diet and feeding behaviour of grey plover Pluvialis squatarolaredshank Tringa totanus in a southern European estuary" Ardeola 43: 145-156

    Google Scholar 

  19. Morrison, R.I.G., Aubry, Y., Butler, R.W., Beyersbergen, G.W., Downes, C., Donaldson, G.M., Gratto-Trevor, C.L., Hicklin, P.W., Johnston, V.H., Ross, R.K. (2001) "Declines in North American shorebird populations" Wader Study Group Bulletin 94: 34-38

    Google Scholar 

  20. Muñoz, J.L., Sánchez, A. (1994) El medio físico y biológico en la Bahía de Cádiz. Consejería de Agricultura y Pesca, Junta de Andalucía

    Google Scholar 

  21. Norris, K., Bannister, R.C.A., Walker, P.A. (1998) "Changes in the number of Oystercatchers Haematopus ostralegus in the Burry Inlet in relation to the biomass of cockles Cerastoderma eduleits commercial exploitation" Journal of Applied Ecology 35: 75-85

    Article  Google Scholar 

  22. Pérez-Hurtado, A., Hortas, F., Ruíz, J., Solís, F. (1993) "Importancia de la Bahía de Cádiz para las poblaciones invernantes invernantes e influencia de las transformaciones humanas" Ardeola 40: 133-142

    Google Scholar 

  23. Pérez-Hurtado, A., Goss-Custard, J.D., García, F. (1997) "The diet of wintering waders in Cádiz Bay, southwest Spain" Bird Study 44: 45-52

    Article  Google Scholar 

  24. Pfister, C., Kasprzyk, M.J., Harrington, B. (1998) "Body-fat levels and annual return in migrating semipalmated sandpipers" The Auk 115: 904-915

    Google Scholar 

  25. Piersma, T., Verkuil, Y., Tulp, I. (1994) "Resources for long-distance migration of knots Calidris canutus islandicaC. c. canutus: how broad is the temporal exploitation window of benthic prey in the western and eastern Wadden Sea?" Oikos 71: 393-407

    Article  Google Scholar 

  26. Piersma, T., Van Gils, J., De Goeij, P., der Meer, J. (1995) "Holling’s functional-response model as a tool to link the food-finding mechanism of a probing shorebird with its spatial-distribution" Journal of Animal Ecology 64: 493-504

    Article  Google Scholar 

  27. Piersma, T., Van Gils, J., Wiersma, P. (1996) "Family Scolopacidae (sandpipers, snipes and phalaropes)" In: Del Hoyo, J., Elliott, A., Sargatal, J. Handbook of the Birds of the World. Vol. 3. Hoatzin to Auks. Lynx Editions, Barcelona, pp 444-533

    Google Scholar 

  28. Piersma, T., Baker, A.J. (2000) "Life history characteristics and the conservation of migratory shorebirds" In: Gosling, L.M., Sutherland, W.J. Behaviour and Conservation. Cambridge University Press, Cambridge, pp 105-124

    Google Scholar 

  29. Shepherd, P.C.F., Boates, J.S. (1999) "Effects of a commercial baitworm harvest on Semipalmated Sandpipers and their prey in the bay of Fundy hemispheric shorebird reserve" Conservation Biology 13: 347-356

    Article  Google Scholar 

  30. Sherfy, M.H., Kirkpatrick, R.L., Richkus, K.D. (2000) "Benthos core sampling and chironomid vertical distribution: implications for assessing shorebird food availability" Wildlife Society B 28: 124-130

    Google Scholar 

  31. Skagen, S.K., Knopf, K.L. (1993) "Towards conservation of midcontinental shorebird migrations" Conservation Biology 7: 533-541

    Article  Google Scholar 

  32. Skagen, S.K., Oman, H.D. (1996) "Dietary flexibility of shorebirds in the western hemisphere" Canadian Field Naturalist 110: 419-444

    Google Scholar 

  33. Stillman, R.A., Goss-Custard, J.D., West, A.D., Durell, S.E.A. Le V. dit, Caldow, R.W.G., McGrorty, S., Clarke, R.T. (2000) "Predicting mortality in novel environments: test and sensitivity of a behaviour-based model" Journal of Animal Ecology 37: 564-588

    Article  Google Scholar 

  34. Stillman, R.A., Goss-Custard, J.D., West, A.D., Durell, S.E.A. Le V. dit, McGrorty, S., Caldow, R.W.G., Norris, K.J., Johnstone, I.G., Ens, J.B., der Meer, J., Triplet, P. (2001) "Predicting shorebird mortality and population size under different regimes of shellfishery management" Journal of Applied Ecology 38: 857-868

    Article  Google Scholar 

  35. Stillman, R.A., West, A.D., Goss-Custard, J.D., Caldow, R.W.G., McGrorty, S., Durell, S.E.A. Le V. dit, Yates, M.G., Atkinson, P.W., Clark, N.A., Bell, M.C., Dare, P.J., Mander, M. (2003) "An individual behaviour-based model can predict shorebird mortality using routinely collected shellfishery data" Journal of Applied Ecology 40: 1090-1101

    Article  Google Scholar 

  36. Warnock, N., Elphick, C., Rubega, M.A. (2002) "Shorebirds in the Marine Environment" In: Schreiber, E.A., Burger, J. Biology of Marine Birds. CRC Press LLC, Florida, pp 581-615

    Google Scholar 

  37. West, A.D., Goss-Custard, J.D., Stillman, R., Caldow, R.W.G., Durell, S.E.A. Le V. dit, McGrorty, S. (2002) "Predicting the impacts of disturbance on shorebird mortality using a behaviour-based model" Biological Conservation 106: 319-328

    Article  Google Scholar 

  38. Zwarts, L., Blomert, A.-M. (1992) "Why Knots Calidris canutus take medium-sized Macoma balthica when six prey species are available" Marine Ecology Progress Series 83: 113-128

    Article  Google Scholar 

  39. Zwarts, L., Wanink, J.H. (1993) "How the food supply harvestable by waders in the wadden sea depends on the variation in energy density, body weightbiomass, burying depth and behaviour of tidal-flats invertebrates" Netherlands Journal of Sea Research 31: 441-476

    Article  Google Scholar 

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Authors and Affiliations

  1. Universidad de Extremadura, Zoologia, Facultad de Ciencias, Avenida de Elvas s/n, E-06071, Badajoz, Spain

    J.A. Masero

  2. Departamento de Biología Animal, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, E-11510, Puerto Real, Spain

    M. Castro, S.M. Estrella & A. Pérez-hurtado

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  1. J.A. Masero
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  4. A. Pérez-hurtado
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Correspondence to J.A. Masero.

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Masero, J., Castro, M., Estrella, S. et al. Evaluating impacts of shellfish and baitworm digging on bird populations: short-term negative effects on the availability of the mudsnail Hydrobia ulvae to shorebirds. Biodivers Conserv 17, 691–701 (2008). https://doi.org/10.1007/s10531-005-3434-0

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