Changes in the foraging pattern of plovers in relation to environmental factors

Pienkowski, M. W.

doi:10.1016/s0003-3472(83)80195-x

Cited by 121 publications

(71 citation statements)

References 19 publications

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“…A priori selection of candidate models was based on the principle of parsimony and scientific plausibility (Burnham & Anderson 2002). We fitted the global model with all explanatory variables (Site, Time after emersion, Temperature, and Wind) (Pienkowski 1983, Piersma 1987, McNeil et al 1992) and the second order interactions except for continuous variables × continuous variables.…”

Section: Methodsmentioning

confidence: 99%

Foraging mode shift in varying environmental conditions by dunlin Calidris alpina

Kuwae¹,

Miyoshi²,

Sassa³

et al. 2010

Mar. Ecol. Prog. Ser.

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Predators may have a series of alternative foraging modes. Under the food resource maximization hypothesis, predators are expected to shift between foraging modes such that they attain the highest intake rate in response to prey availability and constraints varying with environmental conditions. To test this hypothesis, we measured foraging action rate (actions per unit time), capture rate (captures per unit time), and intake rate (amount of energy and nutrients per unit time) for 2 foraging modes, pecking (feeding on epifauna at the sediment surface) and probing (feeding on infauna by inserting the bill into the sediment), in dunlin Calidris alpina on an intertidal sandflat. The birds chose their foraging mode to attain higher feeding success, i.e. individuals that obtained higher capture and intake rates by pecking allocated a higher proportion of foraging effort to pecking, and vice versa. The birds shifted foraging mode from probing to pecking with increased time after emersion. The shift may be related to decreasing efficiency of probing due to increases in the costs of energy and time caused by decreasing sediment penetrability (increasing hardness) with time after emersion. Our in situ study empirically suggests that, while environmental constraints reduce the predators' foraging mode flexibility, the birds show individual-based appropriate adjustments in their foraging mode to attain a higher intake rate at a given time and patch. This extends the ideal forager model for patch choice into foraging mode choice. KEY WORDS: Decision making · Feeding ecology · Foraging behavior · Intertidal ecosystems · ShorebirdsResale or republication not permitted without written consent of the publisher OPEN PEN ACCESS CCESS

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Section: Methodsmentioning

confidence: 99%

Foraging mode shift in varying environmental conditions by dunlin Calidris alpina

Kuwae¹,

Miyoshi²,

Sassa³

et al. 2010

Mar. Ecol. Prog. Ser.

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“…The reasons for this switch to nocturnal feeding around the full moon period are unclear. It is possible that it occurs whenever there is sufficient light to enable visual foraging, 24 thus enabling the birds to exploit a variety of invertebrates that are mainly active at night. 25 Alternatively, Lapwings may be forced to feed at night in order to balance their daily energy budgets, especially during midwinter, 12,25 or in order to reduce the impact of kleptoparasitism by Golden Plovers and gulls.…”

Section: Field Observationsmentioning

confidence: 99%

Influence of environmental factors on the numbers and activity of wintering Lapwings and Golden Plovers

Kirby¹

1997

Bird Study

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“…Conversely, the characteristic stoprun-peck behaviour of plovers represents visual foraging. 10 However, in many sandpipers, e.g. Dunlins Calidris alpina, the diurnal and nocturnal foraging methods are similar and provide few clues as to the senses involved.…”

mentioning

confidence: 99%

Diurnal and nocturnal prey detection by DunlinsCalidris alpina

Mouritsen

1993

Bird Study

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Changes in the foraging pattern of plovers in relation to environmental factors

Cited by 121 publications

References 19 publications

Foraging mode shift in varying environmental conditions by dunlin Calidris alpina

Foraging mode shift in varying environmental conditions by dunlin Calidris alpina

Influence of environmental factors on the numbers and activity of wintering Lapwings and Golden Plovers

Diurnal and nocturnal prey detection by DunlinsCalidris alpina

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