2 edition of Predation ecology and food limitation of the larval dragonfly Anax junius (Aeshnidae). found in the catalog.
Predation ecology and food limitation of the larval dragonfly Anax junius (Aeshnidae).
Todd Christopher Folsom
Written in English
|The Physical Object|
|Number of Pages||138|
Many studies indicate prey organisms select microhabitats with high structural complexity as a way of reducing risk of predation. We used laboratory experiments to show that damselfly larvae, Ischnura verticalis, suffer higher predation rates from pumpkinseed sunfish in low-density r, larvae do not preferentially occupy microhabitats with high vegetation Cited by: Chemical ecology of predator–prey interactions in aquatic ecosystems: a review and prospectus. Canadian Journal of Zoology – [Google Scholar] Folsom TC, Collins NC. The diet and foraging behavior of the larval dragonfly Anax junius (Aeshnidae), with an assessment of the role of refuges and prey activity. Oikos Cited by: 3. The prey species (Lepus americanus) that with the lynx (Lynx canadensis) makes up the classic predator-prey cycle example. The lynx population spike lags slightly behind the prey species'. Lynx dynamics depend mainly on the prey, whereas the prey dynamics depend on food supply, lynx and other predators (Stenseth et al ). I exposed the communities to a factorial combination of environmentally relevant herbicide concentrations (0, 1, 2, or 3 mg acid equivalents [a.e.]/L of Roundup Original MAX) crossed with three predator-cue treatments (no predators, adult newts [Notophthalmus viridescens], or larval dragonflies [Anax junius]).Cited by:
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A previously-developed Food Limitation Index (FLI) for larvae of the dragonfly Anax junius (Drury) was used to measure the food consumption of these animals in four water bodies in southern Ontario.
A previously-developed Food Limitation Index (FLI) for larvae of the dragonfly Anax junius (Drury) was used to measure the food consumption of these animals in four water bodies in southern Ontario. Most mean FLI values from the dragonfly samples did not indicate strong food limitation, but at all sites the degree of limitation tended to increase late in the by: Extending previous experimental studies, we test seven hypotheses concerning the role of fish (bluegill sunfish, Lepomis macrochirus) and larvaldragonfly (Anax junius) predation, competitive effects on damselflies, and the interaction between competition and predation, in determining invertebrate dominance in these communities.
Three types of experiments were conducted: an enclosure experiment within Ecology Pond Cited by: Anax junius (Odonata: Aeschnidae) predation on young crawfish, Procambarus clarkii, was measured in the laboratory. Predation rates (– crawfish/day) were estimated at.
The larvae of spotted salamanders in particular respond to chemical cues from Anax dragonfly nymphs by reducing activity and altering tail shape (Shaffery & Relyea, ; Yurewicz, ), changes that could also affect intraspecific interactions among larvae. Thus, while salamander larvae clearly face threats posed both by aggressive Cited by: 1.
To determine how these tadpoles survive in the presence of predaceous salamander larvae, Ambystoma talpoideum, and larvae of an aeshnid dragonfly, Anax junius, we determined fields densities and sizes of the predators and the prey and conducted predation experiments in the by: Predators did not have a strong effect on species composition.
A model suggested that A. junius and P. hymenaea have the largest effects on snail biomass in the field. Given that both pulmonate snails and dragonfly nymphs are widespread and abundant in. Van Buskirk J () Population consequences of larval crowding in the dragonfly Aeshna juncea.
Ecology – Google Scholar Windsor DM () Climate and moisture variability in a tropical forest: long-term records from BCI, Panama. Smithsonian contributions to the earth by: Analysis of resource partitioning between larvae of three Anisopteran species showed that Aeshna cyanea and Anax imperator (both Aeshnidae) tended to occup The diets of these predators and comparisons between trophic availability and diets indicated that prey species eaten varied according to season and predator species, and that some selection of prey Cited by: Four replicates were performed of all 16 combinations of the presence and absence of 2 predators (larvae of the dragonfly Anax junius and adult salamanders Notophthalmus viridescens) and 2 anuran prey (Bufo americanus and Rana palustris larvae) in an array of artificial temporary ponds.
The 2 species of anurans were introduced at densities high enough Cited by: Natural enemies and their hosts or prey. Helisoma trivolvis snail (a) that is the first intermediate host to the pathogenic trematode Ribeiroia ondatrae (b).
Predatory Anax junius dragonfly larva consuming a chorus frog tadpole in the laboratory (c).Western toads (Anaxyrus boreas) (d) and a Pacific chorus frog (Pseudacris regilla) (e).Photos by Jeremy Monroe/Freshwaters Illustrated Cited by: Large aeshnids (such as Anax and Aeshna) are 'top predators' in many fish-free habitats, and their predation influences the structure of odonate assemblages.
Robinson and Wellborn" subjected a mixture of dragonflies (from habitats containing fish) to predation by Anax junius Cited by: Fincke OM () Population regulation of a tropical damselfly in the larval stage by food limitation, cannibalism, intraguild predation and habitat drying.
Oecologia – ArticleCited by: Seasonal Variation in the Intensity of Competition and Predation Among Dragonfly Larvae. of competition and predation to the ecology of amphibian larvae in temporary ponds.
and Anax junius. Previous experiments have demonstrated that behavioural responses are quickly reversible when tadpoles are moved from predator to no‐predator environments (Relyea ; Fraker ) and our past work on leopard frog tadpoles (Rana pipiens) has found that predator cues emitted by other invertebrate predators (larval Anax junius) break down and Cited by: Body size, temperature, and seasonal differences in size structure influence the occurrence of cannibalism in larvae of the migratory dragonfly, Anax junius.
Aquatic Ecology, Vol. 44, Issue. 4, p. Cited by: Chemical signals are used as information by prey to assess predation risk in their environment. To evaluate the effects of multiple predators on prey growth, mediated by a change in prey activity, small and large bullfrog (Rana catesbeiana) larvae (tadpoles) were exposed to chemical cues from different combinations of bluegill sunfish (Lepomis macrochirus) and larval dragonfly (Anax junius Cited by: Introduction.
The Odonata—dragonflies and damselflies—contain numerous large species with conspicuous mating behaviors, making them one of the most popular research subjects in insect ecology and evolution (Córdoba-Aguilar ).They are often viewed as opportunistic general predators feeding on almost all available invertebrates and sometimes Cited by: 2.
study system and general experimental design. Freshly-laid green frog egg masses and late-instar Anax larvae were collected during May (green frog egg masses) and June (dragonflies) from restored wetlands in which they co- occur on the property of the Ohio Department of Natural Resources-Division of Wildlife's State Fish Hatchery located in Hebron, Author: Taylor A.
Brown, Michael E. Fraker, Stuart A. Ludsin. International Association for Ecology Dragonfly Predators Influence Biomass and Density of Pond Snails show that food limitation (Osenberg ) and predation by fish and crayfish (Bron- Anax junius, an aeshnid dragonfly, and the hemipteran Belostoma flumineum.
junius and B. flumi. Colonization and succession of mosquito and macroinvertebrate predators were studied in m2 ponds (mesocosms) during summer and autumn Larval abundance of C. tarsalis was lower during the hot, summer months than during the autumn. In all studies, larval populations declined markedly weeks after habitat flooding.
Although predator abundances differed in these Cited by: Enallagma traviatum and E. aspersum dominate the littoral macroinvertebrates of Bays Mountain Lake (BML), Tennessee, and of the adjacent fish-free Ecology Pond (EP), respectively.
Seven hypotheses were tested concerning the role of fish (Lepomis macrochirus) and larval-dragonfly (Anax junius) predation, competitive effects on damselflies, and the interaction between competition and predation Cited by: Specifically, we focused on the foraging behaviors of two co‐occurring predators with different hunting modes (i.e., active, ambush), green sunfish (Lepomis cyanellus; Rafinesque ), and common green darner dragonfly larvae (Anax junius; Drury ), on multiple prey types under different plant densities (a.k.a.
SHC) and between patch Cited by: 2. We performed four replicates of all 16 combinations of the presence and absence of two predators (larvae of the dragonfly Anax junius and adult salamanders Notophthalmus viridescens) and two anuran prey (Bufo americanus and Rana palustris larvae) in an array of artificial temporary ponds.
The two species of anurans were introduced at densities high Cited by: We examined the relationship between anti‐predator behaviour and predation risk in five species of larval odonates in combination with three predatory fish species (perch, gudgeon and rudd) that differ in foraging behaviour.
Anax junius (Odonata: Aeshnidae), Ethology,12, (), (). Coping with predators and food Cited by: Lentic freshwater habitats in temperate regions exist along a gradient from small ephemeral ponds to large permanent lakes. This environmental continuum is a useful axis for understanding how attributes of individuals ultimately generate structure at the level of the community.
Community structure across the gradient is determined by both physical factors, such as pond Cited by: Top Aquatic Predator, Anax junius (Odonata: Aeshnidae) Gareth R. Hopkins*, Brian G. Gall* & Edmund D. Brodie, Jr* * Department of Biology, Utah State University, Logan, UT, USA The Ecology Center, Utah State University, Logan, UT, USA Introduction During a predatory encounter, prey experience a variety of situations that limit their ability to.
Larvae of the dragonfly Anax junius and the diving beetle Cybister fimbriolatus were collected from two local ponds in eastern Texas, and stage-specific densities represent natural by: A comparative study of activity levels in larval anurans and response to the presence of different predators presence of a dragonfly larva (Anax junius); (3) I therefore used these contrast values to examine correlations in the evolutionary change of activity level in the presence of different predators (i.e., I considered time active Cited by: level predators may strongly influence agonistic interactions among conspecifics via nonconsumptive (e.g., behaviorally mediated) predator effects.
We sought to investi - gate these interactions experimentally using larval salamanders (Ambystoma macula - tum) as prey and dragonfly nymphs (Anax junius) as predators. Specifically, weCited by: 1. The diet and foraging behavior of the larval dragonfly Anax junius (Aeshnidae), with an assessment of the role of refuges and prey activity.
Oikos. – Galbreath G. H., Hendricks A. Life history characteristics and prey selection of larval Boyeria vinosa (Odonata: Aeshnidae). Freshwater Ecol. 7: – by: 2. The Common Green Darner, biologically known as Anax Junius is a dragonfly species that resembles a darning-needle.
It belongs to the Aeshnidae family. In North America, this species is one of the most commonly found creatures, and its range extends to the south of Panama. We examined the predator–prey relationship between nymphs of the predatory dragonfly Anax junius (Common Green Darner) and larval and metamorphic Notophthalmus viridescens (Eastern Newt), some of which may contain the potent neurotoxin, tetrodotoxin.
First, we conducted a palatability study to determine which life-history stages were palatable to Author: Theresa E. Wrynn, Brian G. Gall. Anax (from Ancient Greek ἄναξ anax, "lord, master, king") is a genus of dragonflies in the family includes species likesuch as the emperor dragonfly, Anax imperator.
Anax spp. are very large dragonflies. They generally have light-colored bodies and dark tails with pale markings. Some species are migratory (Anax junius).Species. The genus Anax includes Class: Insecta.
Introduction. The introduction of non‐native predators is a clear and well‐documented driver of biodiversity loss (e.g., Butchart et al. ; Blaustein et al. ; Cardinale et al. ) as predation and competition for resources by non‐native predators directly diminish community complexity (McGeoch et al.
).Non‐native species also have the potential to alter trophic Cited by: 4. Large dragonfly larvae are top predators in many fish-free water bodies ; different species of the zygopteran genus Enallagma occupy fish-free and fish-containing lakes; lakes that shift from having to lacking fish during some years (“winterkill” lakes) are dominated by still a different species of by: 2.
In the water, various species of ducks and herons eat dragonfly larvae and they are also preyed on by newts, frogs, fish, and water spiders.
Amur falcons, which migrate over the Indian Ocean at a period that coincides with the migration of the globe skimmer dragonfly, Pantala flavescens, may actually be feeding on them while on the : Insecta. Similarly, Relyea found that L. clamitans did not develop deeper tail fins when reared in the nonlethal presence of invertebrate predators, including Anax junius.
The degree to which the tail-lure morph is induced depends upon the anuran species, the specific invertebrate predators, and their density (Relyea a, b,).Cited by: Sexual traits are especially sensitive to low food resources. Other environmental parameters (e.g., predation) should also affect sexual trait expression by favoring investment in Cited by: The wading pools were filled with well water on 27 and 28 April and covered with 60% shade cloth lids to prevent colonization by insects and other amphibians during the experiment.
We added one predator cage to each pool that was either empty or contained a single late‐instar dragonfly nymph (Anax junius Drury) as dictated by the by:. The decrease in adult dragonfly numbers near ponds with fish probably reflects a combination of demographic effects, in which fish predation reduces larval dragonfly dens19, and behavioural.Late instar A.
junius naiads (dragonfly larvae) were also collected from these ponds for use as the experimental predator. Anax larvae are a common predator of tadpoles and have been used in previous experimental studies (Van Buskirk and Relyea ; Wilson et al.
). All tadpoles and naiads were brought to the Stephen F. Austin State Cited by: Odonate larvae have life cycles of 2 or more years; their slow growth is probably due to prey limitation.
Odonate larvae potentially exert a powerful predation pressure within the large pool community, and may be the principal biotic factor determining abundance and distribution of prey taxa within the bog pool by: