Food, Feeding Selectivity and Ecological Efficiencies of Fundulus notatus (Cyprinodontidae)

Atmar, Gerald L.; Stewart, Kenneth W.

doi:10.2307/2424489

Cited by 13 publications

(2 citation statements)

References 15 publications

(6 reference statements)

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“…Gut content data from Fundulus heteroclitus (Weisberg et al . 1981), F notatus (Atmar & Stewart 1972), and F similis (Bennett 1973) suggest that this genus feeds primarily during daylight hours with limited crepuscular foraging . At dawn and dusk, light in Martinez's model was below 10 tE m -2 s-' regardless of turbidity or water depth .…”

Section: Discussionmentioning

confidence: 99%

Relative effects of turbidity and light intensity on reactive distance and feeding of an estuarine fish

1996

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SynopsisGulf killifish Fundulus grandis were allowed to prey on daggerblade grass shrimp Palaemonetes pugio in clear water with bright light, turbid water containing bentonite clay, and clear water treatments where the light intensity was adjusted to match that in the bottom of the turbid tanks . Significantly fewer shrimp were consumed in the turbid tanks relative to the clear and shade treatments where predation rates did not differ significantly. The results suggested that the influence of suspended particles on predation rates was a consequence of light scattering and was not related to a decrease in light intensity . Reactive distances were subsequently determined for human observers viewing a small target in elongated tanks containing turbid water (7 .3-60 .5 NTU) under conditions of both low (8-10 tE m -

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Section: Discussionmentioning

confidence: 99%

Relative effects of turbidity and light intensity on reactive distance and feeding of an estuarine fish

1996

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“…Diets of non-salmonids consisted almost entirely of aquatic invertebrates and assimilation efficiencies were set at 0.90 for dace, 0.85 for sucker, and 0.82 for sculpin (see Davis and Warren 1965, Atmar and Stewart 1972, Eiriksdottir 1974. Net production efficiency values were set at 0.125 for adult fish (bull and cutthroat trout, steelhead, and whitefish), whereas a production efficiency of 0.250 was used for juvenile salmonids (,150 mm) and all non-salmonid species (Cross et al 2011, Donner 2011).…”

Section: Trophic Basis Of Production and Flow Food Websmentioning

confidence: 99%

The floodplain food web mosaic: a study of its importance to salmon and steelhead with implications for their recovery

Bellmore

Baxter

Martens

et al. 2013

Ecological Applications

101

135

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Bellmore, J. Ryan; Baxter, Colden V.; Martens, Kyle; and Connolly, Patrick J., "The floodplain food web mosaic: a study of its importance to salmon and steelhead with implications for their recovery" (2013 Abstract. Although numerous studies have attempted to place species of interest within the context of food webs, such efforts have generally occurred at small scales or disregard potentially important spatial heterogeneity. If food web approaches are to be employed to manage species, studies are needed that evaluate the multiple habitats and associated webs of interactions in which these species participate. Here, we quantify the food webs that sustain rearing salmon and steelhead within a floodplain landscape of the Methow River, Washington, USA, a location where restoration has been proposed to restore side channels in an attempt to recover anadromous fishes. We combined year-long measures of production, food demand, and diet composition for the fish assemblage with estimates of invertebrate prey productivity to quantify food webs within the main channel and five different, intact, side channels; ranging from channels that remained connected to the main channel at low flow to those reduced to floodplain ponds. Although we found that habitats within the floodplain had similar invertebrate prey production, these habitats hosted different local food webs. In the main channel, 95% of total prey consumption flowed to fishes that are not the target of proposed restoration. These fishes consumed 64% and 47% of the prey resources that were found to be important to fueling chinook and steelhead production in the main channel, respectively. Conversely, in side channels, a greater proportion of prey was consumed by anadromous salmonids. As a result, carrying capacity estimates based on food were 251% higher, on average, for anadromous salmonids in side channels than the main channel. However, salmon and steelhead production was generally well below estimated capacity in both the main and side channels, suggesting these habitats are under-seeded with respect to food, and that much larger populations could be supported. Overall, this study demonstrates that floodplain heterogeneity is associated with the occurrence of a mosaic of food webs, all of which were utilized by anadromous salmonids, and all of which may be important to their recovery and persistence. In the long term, these and other fishes would likely benefit from restoring the processes that maintain floodplain complexity.

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Variation in foraging tactics of fishes

Ringler

1983

Predators and Prey in Fishes

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Food, Feeding Selectivity and Ecological Efficiencies of Fundulus notatus (Cyprinodontidae)

Cited by 13 publications

References 15 publications

Relative effects of turbidity and light intensity on reactive distance and feeding of an estuarine fish

Relative effects of turbidity and light intensity on reactive distance and feeding of an estuarine fish

The floodplain food web mosaic: a study of its importance to salmon and steelhead with implications for their recovery

Variation in foraging tactics of fishes

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