Adaptive search in juvenile plaice foraging for aggregated and dispersed prey

Hill, Simeon; Burrows, Michael T.; Hughes, Roger N.

doi:10.1111/j.1095-8649.2002.tb02469.x

Cited by 23 publications

(25 citation statements)

References 30 publications

(34 reference statements)

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“…A positive association between feeding and straightline movements is, however, consistent with what would be expected from animals using an extensive search behavior, efficient for finding highly dispersed prey items, or isolated patches of prey (Hill et al 2002. Such a movement pattern has been described for the wandering albatross, and interpreted as a response to the highly scattered distribution of their squid prey, made possible by low traveling costs over long distances .…”

Section: Feeding During Transitsupporting

confidence: 80%

Predicting feeding success in a migratory predator: integrating telemetry, environment, and modeling techniques

Bestley

Patterson

Hindell

et al. 2010

Ecology

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Foraging theory predicts that mobile predators should target high profitability areas with plentiful resources and minimize time spent moving between these areas. This has led to a focus in recent literature on the identification of "hotspots" important for migratory marine predators, i.e., regions where predators spend disproportionate amounts of time ostensibly due to high prey abundance; and determination of the environmental features characteristic of such areas. We investigated factors predicting foraging success in southern bluefin tuna (SBT; Thunnus maccoyii), by integrating telemetry-based feeding and movement data (n = 19 fish, length to caudal fork [LCF] = 99 +/- 3 cm) with environmental data over the scale of their annual oceanic migrations during 1998-2000. We used widely available statistical modeling techniques, generalized linear models, and generalized linear mixed models, formulated to represent feeding as a Markov process. The results showed increased feeding and predictability of feeding occurs in the coastal waters of southern Australia, providing some evidence that this area represents a fixed foraging "hotspot" for juvenile tuna during the austral summer. However, in oceanic waters southern bluefin tuna did not fit the common model of migration, but rather showed a pattern of relatively high foraging success throughout their migratory range, especially during periods of continuous travel. Interestingly, foraging "coldspots" (prolonged low-feeding periods) as well as "hotspots" were apparent across individual tracks, predicted most strongly by warm ocean temperatures. These results provide a new perspective on the ecology of large-scale feeding migrations within the context of the heterogeneous ocean environment, where the continuous and opportunistic feeding of generalist predators may be more common, particularly in predatory large pelagic fishes, than is currently documented.

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Section: Feeding During Transitsupporting

confidence: 80%

Predicting feeding success in a migratory predator: integrating telemetry, environment, and modeling techniques

Bestley

Patterson

Hindell

et al. 2010

Ecology

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“…Intensive searching was only triggered in captive juvenile plaice ( Pleuronectes platessa ) by aggregations of prey at high local densities and not by isolated prey that were more widely dispersed (Hill et al. ).…”

Section: Discussionmentioning

confidence: 99%

Empirical evidence that large marine predator foraging behavior is consistent with area‐restricted search theory

Bailey

Lyubchich

Wingfield

et al. 2019

Ecology

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When prey is patchily distributed, predators are expected to spend more time searching for food in proximity of recent prey captures before searching in other areas. This behavior, known as area-restricted search, results in predators remaining localized in areas where prey had been detected previously because of the higher probability of encountering additional prey. However, few studies have tested these predictions on marine species because of the difficulties of observing feeding behavior. In this study, we utilized passive acoustic detections of echolocating dolphins to identify foraging behavior. C-PODs (click train detectors) were deployed for two years with an acoustic recorder attached to the same mooring during the second year. The time series of feeding buzzes, indicative of foraging behavior, revealed that both bottlenose (Tursiops truncatus) and common dolphins (Delphinus delphis) were more likely to stay in the area longer when foraging activity was high at the beginning of the encounter. The probability of foraging was also higher following previous foraging activity. This suggests that dolphins were feeding on spatially patchy prey and previous foraging experience influenced their movement behavior. This is consistent with the predictions of area-restricted search behavior, a nonrandom foraging strategy.

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“…Hill et al . (2000, 2002) studied the search behaviour of juvenile plaice foraging for bivalve siphons in a series of mesocosm experiments. They found that when prey were concentrated in a patch in the centre of the mesocosm, the plaice used intensive search, characterized by frequent turning and short movements between pauses, in the few movements before and after attacking a prey.…”

Section: Introductionmentioning

confidence: 99%

The efficiency of adaptive search tactics for different prey distribution patterns: a simulation model based on the behaviour of juvenile plaice

Hill¹,

Burrows²,

Hughes³

2003

Journal of Fish Biology

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Juvenile plaice Pleuronectes platessa are particularly useful for studying forager search behaviour because their search paths are essentially two dimensional, and punctuated by natural stops. Their prey occur in a range of natural distributions from highly aggregated to overdispersed. Juvenile plaice use area-restricted search near aggregated prey and extensive search, consisting of longer moves and fewer turns, between aggregations and when searching for dispersed prey. They search for less conspicuous prey items mainly in the pauses between movements. This saltatory search behaviour contrasts with the continuous search that is usually assumed in search models. A simulation model of saltatory search behaviour showed that a strategy combining extensive and intensive search allows the efficient exploitation of a range of natural prey distribution patterns, and that it is particularly effective when the search behaviour is controlled by perceived prey density. This allows the predator to respond to the localized aggregations which often occur in nature. The selective use of intensive search was more efficient than the continuous use of extensive search even in prey distribution patterns that were statistically over-dispersed.

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Adaptive search in juvenile plaice foraging for aggregated and dispersed prey

Cited by 23 publications

References 30 publications

Predicting feeding success in a migratory predator: integrating telemetry, environment, and modeling techniques

Predicting feeding success in a migratory predator: integrating telemetry, environment, and modeling techniques

Empirical evidence that large marine predator foraging behavior is consistent with area‐restricted search theory

The efficiency of adaptive search tactics for different prey distribution patterns: a simulation model based on the behaviour of juvenile plaice

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