Bahía de Cádiz

Bahía de Cádiz

by | Oct 3, 2019

Bahía de Cadíz

Bird species included in model

Bar-tailed godwit (Limosa lapponica), Black-tailed godwit (Limosa limosa), Common redshank (Tringa totanus), Eurasian oystercatcher (Haematopus ostralegus), Grey plover (Pluvialis squatarola), Kentish plover (Charadrius alexandrinus), Little stint (Calidris minuta), Ringed plover (Charadrius hiaticula), Sanderling (Calidris alba)

Environmental issues simulated

Salina abandonment, aquaculture intensification, changing habitat area

Recomendations from modelling

Abandonment of traditional salinas and intensification of aquaculture does not greatly effect shorebird survival as other feeding habitat available.

More information

Stillman, R.A., Caldow, R.W.G., le V. dit Durell, S.E.A., West, A.D., McGrorty, S., Goss-Custard, J.D., Pérez-Hurtado, A., Castro, M., Estrella, S., Masero, J.A., Rodríguez-Pascual, F.H., Triplet, P., Loquet, N., Desprez, M., Fritz, H., Clausen, P., Ebbinge, B., Norris, K. and Mattison, E., 2005. Coastal bird diversity. Maintaining migratory coastal bird diversity: management through individual-based predictive population modelling, Centre for Ecology and Hydrology, Winfrith Newburgh, Dorset.

Funding

European Commission. Project number: EVK2-2000-00612

Bangor Flats

Bangor Flats

by | Sep 29, 2019

Bangor Flats 

Bird species included in model

Eurasian oystercatcher (Haematopus ostralegus)

Environmental issues simulated

Shellfishery management changing habitat area

Recommendations from modelling

Shellfishery management needs to reserve up to 8 times more shellfish biomass than consumed by Oystercatcher populations.

More information

Goss-Custard, J.D., Stillman, R.A., West, A.D., Caldow, R.W.G., Triplet, P., le V dit Durell, S.E.A. and McGrorty, S., 2004. When enough is not enough: shorebirds and shellfishing. Proceedings of the Royal Society B: Biological Sciences, 271(1536): 233-237.

Funding

Centre for Ecology and Hydrology

Bassin d’Arcachon to Danish Wadden Sea

Bassin d’Arcachon to Danish Wadden Sea

by | Sep 28, 2019

Bassin d’Arcachon to Danish Wadden Sea

Multi-site model

Bassin d’Arcachon, French West Coast, Golfe du Morbihan, English South Coast, Thames Estuaries, Essex Estuaries, Dutch Wadden Sea, West German Wadden Sea, North German Wadden Sea, Danish Wadden Sea

Bird species included in model

Dark-bellied brent goose (Branta bernicla bernicla)

Environmental issues simulated

Changes in land use, fungal infection, human recreation and hunting changing habitat area and availability time

Recommendations from modelling

Loss of terrestrial habitat has greater impact on brent goose than loss of intertidal habitat. Presence of hunting, through disturbance, reduces brent goose mass gain rate.

More information

Stillman, R.A., Caldow, R.W.G., le V. dit Durell, S.E.A., West, A.D., McGrorty, S., Goss-Custard, J.D., Pérez-Hurtado, A., Castro, M., Estrella, S., Masero, J.A., Rodríguez-Pascual, F.H., Triplet, P., Loquet, N., Desprez, M., Fritz, H., Clausen, P., Ebbinge, B., Norris, K. and Mattison, E., 2005. Coastal bird diversity. Maintaining migratory coastal bird diversity: management through individual-based predictive population modelling. Centre for Ecology and Hydrology, Winfrith Newburgh, Dorset.

Funding

European Commission EVK2-2000-00612

Burry Inlet

Burry Inlet

by | Sep 26, 2019

Burry Inlet

Case Study A

Bird species included in model

Eurasian oystercatcher (Haematopus ostralegus)

Environmental issues simulated

Cold winter conditions increasing energy requirements, plus shellfishery management changing habitat area, habitat availability time, food quality.

Recommendations from modelling

Current shellfishing intensity does not reduce shorebird survival, but reduced fishable size or increased daily quota could.

More information

 West, A.D., Goss-Custard, J.D., McGrorty, S., Stillman, R.A., Durell, S., Stewart, B., Walker, P., Palmer, D.W. and Coates, P.J., 2003. The Burry shellfishery and oystercatchers: using a behaviour-based model to advise on shellfishery management policy. Marine Ecology Progress Series, 248: 279-292.

Stillman, R.A., Goss-Custard, J.D., West, A.D., Durell, S.E.A.L.V.D., McGrorty, S., Caldow, R.W.G., Norris, K.J., Johnstone, I.G., Ens, B.J., Van Der Meer, J. and Triplet, P., 2001. Predicting shorebird mortality and population size under different regimes of shellfishery management. Journal of Applied Ecology, 38(4): 857-868.

Funding

Countryside Council for Wales, Commission of the European Communities, Directorate-General for Fisheries, Natural Environment Research Council

Case Study B

Bird species included in model

Eurasian oystercatcher (Haematopus ostralegus)

Environmental issues simulated

Shellfishery management changing habitat area 

Recommendations from modelling

Shellfishery management needs to reserve up to 8 times more shellfish biomass than consumed by Oystercatcher populations.

More information

Goss-Custard, J.D., Stillman, R.A., West, A.D., Caldow, R.W.G., Triplet, P., le V dit Durell, S.E.A. and McGrorty, S., 2004. When enough is not enough: shorebirds and shellfishing. Proceedings of the Royal Society B: Biological Sciences, 271(1536): 233-237.

Funding

Centre for Ecology and Hydrology

Burry Inlet and Three Rivers

Burry Inlet and Three Rivers

by | Sep 25, 2019

Burry Inlet and Three Rivers

Multi-site model

Burry Inlet, Three Rivers

Bird species included in model

Eurasian oystercatcher (Haematopus ostralegus), Red knot (Calidris canutus)

Environmental issues simulated

Shellfishery management changing food density / quality

Recommendations from modelling

Shellfishery management needs to reserve 2-4 times more shellfish biomass than consumed by Oystercatcher populations.

More information

Stillman, R.A., 2008. Predicting the effect of shellfish stocks on the oystercatcher and knot populations of the Burry Inlet and Three Rivers. Countryside Council for Wales Marine Monitoring Report No. 65, Bournemouth University for the Countryside Council for Wales.

Stillman, R.A., Moore, J.J., Woolmer, A.P., Murphy, M.D., Walkere, P., Vanstaen, K.R., Palmer, D. and Sanderson, W.G., 2010. Assessing waterbird conservation objectives: An example for the Burry Inlet, UK. Biological Conservation, 143(11): 2617-2630.

Funding

Countryside Council for Wales