Variation in foraging tactics of fishes

Ringler, Neil H.

doi:10.1007/978-94-009-7296-4_18

Cited by 52 publications

(39 citation statements)

References 42 publications

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“…Intraspecific competition may decrease when individuals vary their choice and handling of prey (Ringler 1983). Fish may specialize in a few methods to capture prey, or may alternatively be generalists, which employ most if not all methods available to the species (Curio 1976, cited in Magurran 1986).…”

Section: Discussionmentioning

confidence: 99%

Size-specific social interactions and foraging styles in a shallow water population of mutton snapper,Lutjanus analis (Pisces: Lutjanidae), in the central Bahamas

et al. 1994

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SynopsisField observations quantified the effects of fish size and time of day on activity patterns, intraspecific encounters, and foraging styles in mutton snapper, Lutjanus analis, during the spring and winter of 1991. Fish ranged in size from 15 to 65 cm fork length (FL), and were associated with an artificial patch reef system located on a shallow seagrass meadow in the Exuma Cays, Bahamas. The most common, non-resting diurnal activities were intraspecific chasing and displacing, and feeding. Intraspecific displacing was significantly higher during midday compared to morning or evening. The highest proportion of intraspecific encounters (combined chasing and displacing events) occurred among medium (25-35 cm FL) and large (> 35 cm FL) fish. The few large fish observed (13% of population) initiated the same proportion of encounters as the predominant (50%) medium fish. The remaining (37%) small fish (> 25 cm FL) were the least aggressive. Dark barred and dark nape color patterns were associated with displacing and chasing, respectively. Fish exhibited considerable variability in feeding behavior. Proportionally fewer fish fed during midday compared to morning or evening, although small fish fed proportionally more often than medium or large fish despite time of day. Picking was the primary feeding mode and was observed during all times of day. Winnowing was observed during midday and evening, whereas midwater strikes were confined to morning and evening. Small fish displayed proportionally higher picking and midwater strikes during morning and evening, respectively, compared to medium or large fish. However, large fish winnowed proportionally more often than small or medium fish during evening. Dark barred color patterns were associated with feeding on the substrate, whereas no color changes occurred during midwater strikes. Our results indicate that L. anafis forms dominance hierarchies and that high variability in foraging styles, according to fish size and time of day, may be a means to reduce intraspecific competition.

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Section: Discussionmentioning

confidence: 99%

Size-specific social interactions and foraging styles in a shallow water population of mutton snapper,Lutjanus analis (Pisces: Lutjanidae), in the central Bahamas

et al. 1994

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“…1962, Clarke & Sutterlin 1985 . Similarly there may be marked inter-individual variations in foraging tactics, with increased specialization on particular prey types leading to reduced capture efficiencies for others (Ringler 1983, Bence 1986, Ehlinger 1990 . Dietary specialization may also be accompanied by changes in both the morphology of the gastrointestinal tract and in digestive and 291 absorptive capacities (Hofer 1979a, b, Buddington et al 1987, Meyer 1987,1990a, b, Wainwright et al .…”

Section: Discussionmentioning

confidence: 99%

Experimental evidence of cannibalism and prey specialization in Arctic charr, Salvelinus alpinus

et al. 1995

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SynopsisUse of a radiographic technique enabled the study of prey selection and individual specialization in Arctic chary, Salvelinus alpinus, fed with small charr and dry pellets under laboratory conditions . Both naive and experienced fish (mean weight 475 g, mean length 34 .9 cm), selected the smallest individuals when offered juvenile charr (6-16 cm) as prey. The selected prey were, on average, 22% of the predator length . Cannibalism appeared to involve individual specialization, since when groups of large charr were given the opportunity to feed on juveniles one day every two weeks, the same individuals were cannibalistic throughout the sampling period of two months. When large charr were presented with alternate cycles of different food types consisting of dry pellets and fish prey, the charr exhibited a strong and consistent feeding specialization with three distinct groups being recognised : cannibals, pellet eaters and non-feeding fish .

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“…Regardless of the type of predator, these studies involve predator physiology, morphology and behavioral patterns. Ringler (1983) has reviewed the foraging tactics of fish, noting a definite bias toward salmonid studies. Little research on foraging strategies of invertebrate predators in stream riffles has been done beyond the role of prey defenses, chemoreception and prey size in stonefly/mayfly predator-prey interactions (Peckarsky, 1980(Peckarsky, , 1982Molles and Pietruszka, 1983).…”

Section: Introductionmentioning

confidence: 99%

Feeding ecology of three predacious aquatic insects and two fish in a riffle of the Speed River, Ontario

Fuller

Hynes

1987

Hydrobiologia

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The food habits of two fish (Etheostoma flabellare and Rhinichthys atratulus) and three predacious aquatic insects (Nigronia serricornis, Paragnetina media and Agnetina capitata) were examined for one year in a riffle of the Speed River, Ontario. Adult E. frabellare fed primarily on net-spinning caddisflies whereas juvenile E. flabellare relied heavily on chironomids. Rhinichthys atratulus had a more varied diet composed of chironomids, Antocha larvae (Tipulidae) and net-spinning caddisflies. Two of the aquatic insect predators consumed large numbers of net-spinning caddisflies; however, I? media contained large percentages of Hydropsyche and Cheumatopsyche whereas N. serricornis fed primarily on non-hydropsychid net-spinners. The diet o? A. capitata was composed largely of chironomids and mayflies. Schoener's diet overlap index ((Y) suggested that large E. J'abellare and I? media had similar diets; however, E. flabellare ingested much larger prey than I? media. Adult E. flabellare contained a significantly greater proportion of larger prey items in comparison with benthic samples whereas similar comparisons with other predators showed no selection for larger prey. These data demonstrate that E. flabellare was size selective given the range of prey sizes available whereas the other predators were not. Also, there was little dietary overlap among the fish and invertebrate predators suggesting a partitioning of resources.

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Variation in foraging tactics of fishes

Cited by 52 publications

References 42 publications

Size-specific social interactions and foraging styles in a shallow water population of mutton snapper,Lutjanus analis (Pisces: Lutjanidae), in the central Bahamas

Size-specific social interactions and foraging styles in a shallow water population of mutton snapper,Lutjanus analis (Pisces: Lutjanidae), in the central Bahamas

Experimental evidence of cannibalism and prey specialization in Arctic charr, Salvelinus alpinus

Feeding ecology of three predacious aquatic insects and two fish in a riffle of the Speed River, Ontario

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