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

Fuller, Randall L.; Hynes, H. B. N.

doi:10.1007/bf00008706

Cited by 18 publications

(10 citation statements)

References 27 publications

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“…The preference of Paragnetina media for hydropsychid caddisflies has been reported elsewhere (Fuller & Hynes, 1987). Although prey selectivity of these organisms will largely depend on prey availability (Allan, 1982), the similarity of our results to those observed in the field suggests that feeding behaviour of stoneflies in experimental streams reflected natural preferences.…”

Section: Discussionsupporting

confidence: 84%

The influence of copper exposure on predator‐prey interactions in aquatic insect communities

1989

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1. Vulnerability of two species of net-spinning caddisflies {Chimarra sp. and Hydropsyche morosa) to predation by the stonefly, Paragnetina media, was significantly greater in experimental streams dosed with copper (target concentration=6 fig 1"^) than in control streams.2. Results of stomach analyses showed that Hydropsychidae was the major component of stonefly diets in experimental streams and that the number of Hydropsychidae per stonefly gut was significantly greater in dosed streams than controls.3. Since these results could not be predicted using single species bioassays, we suggest that such simple tests be supplemented with more environmentally realistic procedures that account for species interactions.

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Section: Discussionsupporting

confidence: 84%

The influence of copper exposure on predator‐prey interactions in aquatic insect communities

1989

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“…Diets of the invertebrate predators in Buzzards Branch were composed of a variety of animal spedes and detritus, and were similar to those reported for related taxa in other studies (e.g. Baker & McLachlan, 1979;Allan, 1982;Johnson, 1982;Blois, 1985;Feminella & Stewart, 1986;Fuller & Hynes, 1987;Dudgeon, 1989b,c). Diet was related to the habitat of the predators.…”

Section: Feeding Habits and Trophic Basis Of Productionsupporting

confidence: 81%

“…Baker & McLachlan, 1979;Allan, 1982;Johnson, 1982;Blois, 1985;Feminella & Stewart, 1986;Fuller & Hynes, 1987;Dudgeon, 1989b,c). Diet was related to the habitat of the predators.…”

Section: Predator Guildmentioning

confidence: 96%

Ecology of invertebrate predators in a Coastal Plain stream

Smith¹,

Smock²

1992

Freshwater Biology

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SUMMARY 1. The spatial and temporal abundance patterns, production and feeding habits of invertebrate predators were determined in a sand‐bottomed, headwater stream in Virginia, U.S.A. 2. Annual mean density and biomass of predators in debris dams were 3897 individuals m−2 and 2.5 g dry mass m−2, respectively, but only 711 individuals m−2 and 0.2 gm−2 on the sediment. Predator production was 8.36 gm−2yr−1 in debris dams compared to 1.52 gm−2yr−1 on the sediment. Annual predator production, weighted by habitat availability, was 1.73gm−2yr−1. 3. The predominant taxa in terms of production were the chironomids Thienemannimyia spp, complex, Ablabesmyia parajanta, Zavrelimyia sp., and the odonate Cordulegaster maculata. Chironomidae and Odonata together comprised 77% of the production of the predator guild. 4. Based on gut content analysis and calculations of the trophic basis of production, estimated predator production was supported mostly by Chironomidae (38%), detritus (20%), unidentifiable insects (14%), and Ephemeroptera (11%). Total food ingestion by predators was 9.8 gm−2yr−1, 63% of which was detritus and 37% of which was animal material on an areal basis. The predator guild consumed an estimated 94% of primary invertebrate consumer production on the channel surface of the stream.

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“…Trophic studies of freshwater fish assemblages are not exhaustive food web analyses, but simultaneous gut analyses of freshwater fishes and invertebrates are rare and usually do not encompass entire food webs (e.g., Mackey 1979, Allan 1983a, Fuller & Hynes 1987but see Minshall 1967). Hence, the complete food chains of the 15 freshwater ecosystems could not be established, such that the omnivory found in the present analysis may not all be same-chain in character.…”

Section: Pimephales Exoglossum Fundulusmentioning

confidence: 99%

The importance of omnivory and predator regulation of prey in freshwater fish assemblages of North America

Vadas

1990

Environ Biol Fish

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SynopsisFood webs for 15 freshwater ecosystems in North America are reconstructed, based upon fish feeding habits in these ecosystems and established trophic categorizations for aquatic invertebrates. My own research in Goose Creek, Virginia, as well as literature data, provided the necessary information. One property of theoretical interest for food webs, namely omnivory, is examined, and the results are related to various topics more typically studied by freshwater fish ecologists, including predator-prey regulation, optimal foraging theory, and tropho-dynamics. The data indicate that omnivory is often important in freshwater ecosystems, such that fish may not always control the abundance of their prey. It is emphasized that knowledge of omnivory patterns can provide important insights into community structure and function in freshwater ecosystems.

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

Cited by 18 publications

References 27 publications

The influence of copper exposure on predator‐prey interactions in aquatic insect communities

The influence of copper exposure on predator‐prey interactions in aquatic insect communities

Ecology of invertebrate predators in a Coastal Plain stream

The importance of omnivory and predator regulation of prey in freshwater fish assemblages of North America

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