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The use of a flexible patch leaving rule under exploitative competition: a field test with swans. / Nolet, B.A.; Klaassen, R.H.G.; Mooij, W.M.

In: Oikos, Vol. 112, No. 2, 2006, p. 342-352.

Research output: Scientific - peer-reviewArticle

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Nolet, B.A.; Klaassen, R.H.G.; Mooij, W.M. / The use of a flexible patch leaving rule under exploitative competition: a field test with swans.

In: Oikos, Vol. 112, No. 2, 2006, p. 342-352.

Research output: Scientific - peer-reviewArticle

BibTeX

@article{0f6ce0da69be471da909c0cf140e9221,
title = "The use of a flexible patch leaving rule under exploitative competition: a field test with swans",
abstract = "Learning animals are predicted to use a flexible patch-leaving threshold (PLT) while foraging in a depletable environment under exploitative competition. This prediction was tested in flock-feeding Bewick's swans (Cygnus columbianus bewickii) depleting hidden tubers of fennel pondweed (Potamogeton pectinatus) in a two-dimensional, continuous environment. The swans' patch residence time was measured by combining recordings of the foraging behaviour and movement paths. The tuber biomass density was measured before and after the period of exploitation, using the presumable foraging window of the swans as the scale of measurement. Swan foraging was simulated in order to predict the effects of flexible and fixed PLTs, respectively, on the patch residence time and the spatial heterogeneity of the tuber biomass density. Flexible PLTs were predicted to lead to short and decreasing patch residence times and a decrease in the coefficient of variation in tuber biomass densities, whereas the reverse was generally the case for fixed PLTs. Observed patch residence times did not decrease with time and were intermediate between those predicted for swans with flexible and fixed PLTs. Furthermore, an increase of the coefficient of variation in the tuber biomass density was observed. Given the observed giving-up biomass densities the most likely model was one with swans with a fixed rather than a flexible PLT. These results point at factors that may affect the spacing behaviour or constrain the use of a flexible PLT in swans.",
author = "B.A. Nolet and R.H.G. Klaassen and W.M. Mooij",
note = "Reporting year: 2006 Metis note: 3675; CL; AFW ; AnE ; PDI ; AqE file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs2006/Nolet_ea_3675.pdf",
year = "2006",
doi = "10.1111/j.0030-1299.2006.13460.x",
volume = "112",
pages = "342--352",
journal = "Oikos",
issn = "0030-1299",
publisher = "Blackwell Publishing Ltd",
number = "2",

}

RIS

TY - JOUR

T1 - The use of a flexible patch leaving rule under exploitative competition: a field test with swans

AU - Nolet,B.A.

AU - Klaassen,R.H.G.

AU - Mooij,W.M.

N1 - Reporting year: 2006 Metis note: 3675; CL; AFW ; AnE ; PDI ; AqE file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs2006/Nolet_ea_3675.pdf

PY - 2006

Y1 - 2006

N2 - Learning animals are predicted to use a flexible patch-leaving threshold (PLT) while foraging in a depletable environment under exploitative competition. This prediction was tested in flock-feeding Bewick's swans (Cygnus columbianus bewickii) depleting hidden tubers of fennel pondweed (Potamogeton pectinatus) in a two-dimensional, continuous environment. The swans' patch residence time was measured by combining recordings of the foraging behaviour and movement paths. The tuber biomass density was measured before and after the period of exploitation, using the presumable foraging window of the swans as the scale of measurement. Swan foraging was simulated in order to predict the effects of flexible and fixed PLTs, respectively, on the patch residence time and the spatial heterogeneity of the tuber biomass density. Flexible PLTs were predicted to lead to short and decreasing patch residence times and a decrease in the coefficient of variation in tuber biomass densities, whereas the reverse was generally the case for fixed PLTs. Observed patch residence times did not decrease with time and were intermediate between those predicted for swans with flexible and fixed PLTs. Furthermore, an increase of the coefficient of variation in the tuber biomass density was observed. Given the observed giving-up biomass densities the most likely model was one with swans with a fixed rather than a flexible PLT. These results point at factors that may affect the spacing behaviour or constrain the use of a flexible PLT in swans.

AB - Learning animals are predicted to use a flexible patch-leaving threshold (PLT) while foraging in a depletable environment under exploitative competition. This prediction was tested in flock-feeding Bewick's swans (Cygnus columbianus bewickii) depleting hidden tubers of fennel pondweed (Potamogeton pectinatus) in a two-dimensional, continuous environment. The swans' patch residence time was measured by combining recordings of the foraging behaviour and movement paths. The tuber biomass density was measured before and after the period of exploitation, using the presumable foraging window of the swans as the scale of measurement. Swan foraging was simulated in order to predict the effects of flexible and fixed PLTs, respectively, on the patch residence time and the spatial heterogeneity of the tuber biomass density. Flexible PLTs were predicted to lead to short and decreasing patch residence times and a decrease in the coefficient of variation in tuber biomass densities, whereas the reverse was generally the case for fixed PLTs. Observed patch residence times did not decrease with time and were intermediate between those predicted for swans with flexible and fixed PLTs. Furthermore, an increase of the coefficient of variation in the tuber biomass density was observed. Given the observed giving-up biomass densities the most likely model was one with swans with a fixed rather than a flexible PLT. These results point at factors that may affect the spacing behaviour or constrain the use of a flexible PLT in swans.

U2 - 10.1111/j.0030-1299.2006.13460.x

DO - 10.1111/j.0030-1299.2006.13460.x

M3 - Article

VL - 112

SP - 342

EP - 352

JO - Oikos

T2 - Oikos

JF - Oikos

SN - 0030-1299

IS - 2

ER -

ID: 81518