Search Results - "Ens, B.J"

Experimental evidence for effects of human disturbance on foraging and parental care in oystercatchers by Verhulst, S., Oosterbeek, K., Ens, B.J.

“…We carried out two experiments to quantify effects of human disturbance on foraging and parental care in European oystercatchers ( Haematopus ostralegus). In…”
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Tracked to protect - Spatiotemporal dynamics of recreational boating in sensitive marine natural areas by Meijles, E.W., Daams, M.N., Ens, B.J., Heslinga, J.H., Sijtsma, F.J.

“…In many coastal areas, high numbers of recreationists may exceed ecological capacities. Careful monitoring of visitor flows is a first prerequisite for coastal…”
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Why Does the Typically Monogamous Oystercatcher (Haematopus Ostralegus) Engage in Extra-Pair Copulations? by Heg, D, Ens, B.J, Burke, T, Jenkins, L, Kruijt, J.P

“…(1) We attempted to identify the possible costs and benefits of Extra-Pair Copulations (EPCs) from field observations on a colour-marked population of…”
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Bird radar validation in the field by time-referencing line-transect surveys by Dokter, Adriaan M, Baptist, Martin J, Ens, Bruno J, Krijgsveld, Karen L, van Loon, E Emiel

“…Track-while-scan bird radars are widely used in ornithological studies, but often the precise detection capabilities of these systems are unknown…”
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Experimental evidence for interference competition in oystercatchers, Haematopus oastralegus. II. Free-living birds by Rutten, A.L, Oosterbeek, K, Verhulst, S, Dingemanse, N.J, Ens, B.J

“…Field studies of interference competition in free-living animals have relied on natural fluctuations in forager density, which are often confounded with other…”
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Moderate livestock grazing of salt, and brackish marshes benefits breeding birds along the mainland coast of the Wadden Sea by Mandema, Freek S., Tinbergen, Joost M., Ens, Bruno J., Koffijberg, Kees, Dijkema, Kees S., Bakker, Jan P.

“…Our study investigated how bird species richness and abundance was related to livestock grazing on salt, and brackish marshes, with an emphasis on songbirds,…”
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Intake rates and the functional response in shorebirds (Charadriiformes) eating macro-invertebrates by Goss-Custard, John D., West, Andrew D., Yates, Michael G., Caldow, Richard W. G., Stillman, Richard A., Bardsley, Louise, Castilla, Juan, Castro, Macarena, Dierschke, Volker, dit Durell, Sarah. E. A. Le. V., Eichhorn, Goetz, Ens, Bruno J., Exo, Klaus-Michael, Udayangani-Fernando, P. U., Ferns, Peter N., Hockey, Philip A. R., Gill, Jennifer A., Johnstone, Ian, Kalejta-Summers, Bozena, Masero, Jose A., Moreira, Francisco, Nagarajan, Rajarathina Velu, Owens, Ian P. F., Pacheco, Cristian, Perez-Hurtado, Alejandro, Rogers, Danny, Scheiffarth, Gregor, Sitters, Humphrey, Sutherland, William J., Triplet, Patrick, Worrall1, Dave H., Zharikov, Yuri, Zwarts, Leo, Pettifor, Richard A.

“…As field determinations take much effort, it would be useful to be able to predict easily the coefficients describing the functional response of free-living…”
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Experimental evidence for interference competition in oystercatchers, Haematopus ostraelegus. I. Captive birds by Rutten, A.L, Oosterbeek, K, Meer, J.W., van der, Verhulst, S, Ens, B.J

“…Interference competition, the immediately reversible decrease in per capita foraging success with increasing forager density, has important implications for…”
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Mass mortality of common eiders (Somateria mollissima) in the Dutch Wadden Sea, winter 1999/2000: starvation in a commercially exploited wetland of international importance by CAMPHUYSEN, C. J, BERREVOETS, C. M, VAN DER MEER, J, PIERSMA, T, CREMERS, H. J. W. M, DEKINGA, A, DEKKER, R, ENS, B. J, VAN DER HAVE, T. M, KATS, R. K. H, KUIKEN, T, LEOPOLD, M. F

“…Common eiders Somateria mollissima are large, marine, molluscivorous ducks and are the main avian consumers of blue mussels and common cockles in the Wadden…”
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Optimal foraging on perilous prey: risk of bill damage reduces optimal prey size in oystercatchers by Rutten, Anne L., Oosterbeek, Kees, Ens, Bruno J., Verhulst, Simon

“…Intake rate maximization alone is not always sufficient in explaining prey size selection in predators. For example, bivalve-feeding oystercatchers regularly…”
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Body condition of shorebirds upon arrival at their Siberian breeding grounds by Tulp, I.Y.M, Schekkerman, H, Klaassen, R.H.G, Ens, B.J, Visser, G.H

“…Arctic breeding shorebirds carry substantial body stores on their long-distance migrations from their non-breeding grounds. Upon arrival at the breeding area…”
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Optimal avian migration: A dynamic model of fuel stores and site use by Weber, Thomas P., Ens, Bruno J., Houston, Alasdair I.

“…Birds migrating between widely separated wintering and breeding grounds may choose among a number of potential stopover sites by using different itineraries…”
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Predicting Shorebird Mortality and Population Size under Different Regimes of Shellfishery Management by Stillman, R. A., Goss-Custard, J. D., West, A. D., S. E. A. Le V. Dit Durell, McGrorty, S., Caldow, R. W. G., Norris, K. J., Johnstone, I. G., Ens, B. J., Van Der Meer, J., Triplet, P.

“…1. Human interests often conflict with those of wildlife. In the coastal zone humans often exploit shellfish populations that would otherwise provide food for…”
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Models of Interference and Their Consequences for the Spatial Distribution of Ideal and Free Predators by VAN DER MEER, J, ENS, B. J

“…1. In order to predict the spatial distribution of `ideal' and `free' predators, one needs to know how food intake rate of an individual predator is related to…”
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Effect of Investigator Disturbance on Nest Attendance and Egg Predation in Eurasian Oystercatchers by Verboven, Nanette, Ens, Bruno J, Dechesne, Sharon

“…Eurasian Oystercatchers (Haematopus ostralegus) breeding on the salt marsh of Schiermonnikoog (Dutch Wadden Sea) lose many eggs to predators, mainly Herring…”
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Behavioural ecology: love thine enemy? by Ens, B.J

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Consequences of Habitat Loss at Migratory Stopover Sites: A Theoretical Investigation by Weber, Thomas P., Houston, Alasdair I., Ens, Bruno J.

“…We use a dynamic optimization model to assess the consequences of habitat loss at migratory stopover sites. We emphasize costs birds face during stopover (e.g…”
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LOCAL DOMINANCE AND TERRITORIAL SETTLEMENT OF NONBREEDING OYSTERCATCHERS by Heg, Dik, Ens, Bruno, Jeugd, Henk P. Van Der, Bruinzeel, Leo

“…1. We studied the mechanisms of territory acquisition in an oystercatcher (Haematopus ostralegus) breeding population on Schiermonnikoog (1983-1997), competing…”
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The effect of shell-fishing on Oystercatcher populations in the Dutch Wadden Sea by Ens, B.J

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Oystercatchers and their estuarine food supplies by Blomert, A.M, Ens, B.J, Goss-Custard, J.D, Hulscher, J.B, Zwarts, L

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