The role of lipids as feeding stimulants for shredding aquatic insects

Cargill, Austen S.; Cummins, Kenneth W.; Hanson, Boyd J.; Lowry, Robert R.

doi:10.1111/j.1365-2427.1985.tb00215.x

Cited by 86 publications

(42 citation statements)

References 36 publications

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“…PV So8 did not attract G. roeselii but rather repelled the gammarid, leads us to conclude that compounds other than those extracted by methanol mediate the preference. The food selection of aquatic insects is influenced by their nutritional needs because their food often contains low amounts of available proteins, carbohydrates, and lipids (CARGILL et al, 1985a). CARGILL et al (1985a) showed that five Trichoptera species preferred leaf discs coated with pure unsaturated 18-and 20-carbon fatty acids, which suggests that lipids from aquatic hyphomycetes are important intermediates in the energy transfer from detritus to detritivores.…”

Section: Discussionmentioning

confidence: 99%

“…The food selection of aquatic insects is influenced by their nutritional needs because their food often contains low amounts of available proteins, carbohydrates, and lipids (CARGILL et al, 1985a). CARGILL et al (1985a) showed that five Trichoptera species preferred leaf discs coated with pure unsaturated 18-and 20-carbon fatty acids, which suggests that lipids from aquatic hyphomycetes are important intermediates in the energy transfer from detritus to detritivores. Lipid extracts of three aquatic hyphomycetes led to the same patterns of leaf consumption by Gammarus tigrinus as leaf litter inoculated with those fungi (RONG et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

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The Impact of Fungal Extracts on Leaf Litter on the Food Preference of Gammarus roeselii

Aßmann

Elert

2009

International Review of Hydrobiology

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We investigated the effect of methanol and methanol/methylene chloride extracts of the oomycete Pythium sp. JN 1-b and of the fungi Ascomycete sp. PVSo8, Fusarium sporotrichoides, and Cylindrocarpon sp. 94-2057 on the food preference of Gammarus roeselii. The preference for leaf discs coated with these extracts compared to uncoated leaf discs was tested in food-choice assays. Methanol extracts of all strains repelled G. roeselii, and the effect of the extract concentration on relative consumption was strain specific. The repellent effect of these extracts, especially of extracts of Cylindrocarpon sp., decreased when the fungi were grown on leaf extract medium as opposed to synthetic medium containing sucrose. None of the methanol/methylene chloride extracts affected the food preference of the gammarid. We conclude that biologically active compounds were extracted from fungi and an oomycete were soluble in methanol but not in methanol/methylene chloride. Only repellent activity was observed with the extracts, and relative ratios of repellents and attractants might determine the consumption of fungi by G. roeselii.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Impact of Fungal Extracts on Leaf Litter on the Food Preference of Gammarus roeselii

Aßmann

Elert

2009

International Review of Hydrobiology

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“…At the same time, we measured the energy reserves by assaying glycogen and lipid contents. Glycogen represents a short-term energy source available for current activities (Sparkes et al, 1996), whereas lipids are used for long-term storage to be used as nutrients during starvation or reproduction periods (Cargill et al, 1985). Finally, we measured the levels of malondialdehyde (MDA), a product of lipid peroxidation considered as a toxicity biomarker which reflects cellular damage.…”

Section: Introductionmentioning

confidence: 99%

Influence of gender and season on reduced glutathione concentration and energy reserves of Gammarus roeseli

Gismondi¹,

Beisel²,

Cossu-Leguille³

2012

Environmental Research

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a b s t r a c tAs biomarkers are known to be influenced by biotic and abiotic factors (e.g. gender, temperature), we investigated over a one-year long sampling period, the influence of season and gender on reduced glutathione concentrations and its synthesis in the crustacean amphipod Gammarus roeseli. At the same time, we assessed energy reserves and malondialdehyde levels as toxic biomarker. Results have shown that, in both genders, reduced glutathione concentrations were inversely correlated to water temperature, and higher in females than in males whatever the season. Total lipid and glycogen contents were higher in females than in males, allowing females to have enough energy to assume the reproductive period and maintain high GSH concentrations for detoxification processes. Conversely, females have lower cell damages than males. These differences between genders could induce differential sensitivity in a contamination context, and thus affect the population. Females could resist better than males in contaminated environments, especially in spring when reduced glutathione concentration is the highest.

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“…Moreover, energy reserves were estimated by measuring protein concentrations as well as total lipid and glycogen contents. The levels of glycogen are representative of the energy available for current activities (Sparkes et al, 1996) whereas lipids are stored in fat bodies and are used during starvation or reproduction periods (Cargill et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

Microsporidia parasites disrupt the responses to cadmium exposure in a gammarid

Gismondi

Rigaud

Beisel

et al. 2012

Environmental Pollution

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a b s t r a c tMicrosporidia parasites are commonly found in amphipods, where they are often asymptomatic, vertically-transmitted and have several effects on host sexuality and behaviour. As amphipods are often used as models in ecotoxicological studies, we investigated the effect of microsporidian infections on energy reserves and defence capacities of Gammarus roeseli under cadmium stress. Only females were infected by two microsporidia parasites: Dictyocoela roeselum or Dictyocoela muelleri. In physiological conditions, microsporidia had no major effect on energy reserves and defence capacities of G. roeseli, while under cadmium exposure, energy reserves and antioxidant defence were weaker in infected females. Moreover, higher malondialdehyde levels detected in infected females revealed that they suffered more cellular damages. Our results suggest that microsporidia may affect gammarid fitness in stressful conditions, when parasitic stress cannot be compensated by the host. Consequently, microsporidia parasites should be a factor necessary to take into account in ecotoxicology studies involving amphipods.

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The role of lipids as feeding stimulants for shredding aquatic insects

Cited by 86 publications

References 36 publications

The Impact of Fungal Extracts on Leaf Litter on the Food Preference of Gammarus roeselii

The Impact of Fungal Extracts on Leaf Litter on the Food Preference of Gammarus roeselii

Influence of gender and season on reduced glutathione concentration and energy reserves of Gammarus roeseli

Microsporidia parasites disrupt the responses to cadmium exposure in a gammarid

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