Food Relationships

Hodek, Ivo; Evans, Edward W.

doi:10.1002/9781118223208.ch5

Cited by 146 publications

(137 citation statements)

References 705 publications

(848 reference statements)

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“…Harmonia axyridis, for example, may switch among various kinds of prey or plant food (pollen, nectar, fruit) (Koch 2003;Lucas 2012). Many aphids and other hemipterans (Adelgidae, Psyllidae, Aleyrodidae), and even pollen were found to be essential food for this species (Berkvens et al 2008;Hodek and Honȇk 2009;Hodek and Evans 2012). Despite this broad polyphagy, H. axyridis can be regarded as principally aphidophagous (Koch 2003), and therefore we restrict the usage of the term ''intraguild predators of H. axyridis'' to other primarily aphidophagous species that can also prey on H. axyridis.…”

Section: Predators Of Harmonia Axyridismentioning

confidence: 99%

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

et al. 2017

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Section: Predators Of Harmonia Axyridismentioning

confidence: 99%

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

et al. 2017

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“…Biological fitness of natural populations of ladybird species varies in response to differences in biotic (quality of aphid preys and host plants) and abiotic (temperature and relative humidity, in particular) factors of different habitats 5,6 . Polyphagous ladybird predators that feed on different aphid prey species on different cultivated plants show differences in biological fitness and, therefore, are likely to differ in their genotypes 3,7 . The most potent genotypes of a predator species showing greater predation efficiency will be an important source for biocontrol agents.…”

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confidence: 99%

“…CURRENTLY, tigers (Panthera tigris) survive in a mere 7% of their former range with less than 3,500 individuals estimated to be living in the wild 1,2 . Within the 13 range countries, India is a key site for long-term survival of tigers in the wild 3 . However, Cambodia recently announced the local extinction of its tiger species, thus depicting depleting populations.…”

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confidence: 99%

“…Natural control agents like predators are considered important in the management of pest populations of these aphids. Ladybird predators are widely recognized as potential and promising natural control agents 3,4 . Biological fitness of natural populations of ladybird species varies in response to differences in biotic (quality of aphid preys and host plants) and abiotic (temperature and relative humidity, in particular) factors of different habitats 5,6 .…”

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confidence: 99%

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Molecular Characterization of Ladybird Predators (Coleoptera: Coccinellidae) of Aphid Pests (Homoptera:Aphididae) in North East India

2017

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Ladybird beetles are potential and promising biological control agents for the management of insect pests. These insects show variations in biological fitness in diverse habitats and subsequently in term of genotypes. We used cytochrome oxidase I (COI) gene sequences to study within-species genetic variation in four species of ladybird predators, viz. Coccinella transversalis (Fab.), Cheilomenes sexmaculata (Fab.), Micraspis discolor (Fab.) and Anisolemnia dilatata (Fab.) collected from different cultivated habitats of Tripura, North East India. Results of multiple sequence alignments of partial COI gene (553 bp) of mitochondrial origin showed 100% homology among different populations (within species) of three ladybird species. The molecular identity of M. discolor could not be established due to the absence of matching nucleotide sequence for this region of COI gene in the NCBI database. Three of the four populations of Micraspis species showed 100% homology in partial COI gene sequencing, but one representative population showed 52 nucleotide mutations, of which 1 mutation was found to result in the alteration of the codon from valine to isoleucine, and seemed to represent a different Micraspis species previously not known from NE India. This study shows that the three most common species of ladybird predators of aphid pests in NE India are fairly homogenous with respect to the COI gene, but species of Micraspis are genetically diverse and need further studies to address this issue.

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“…Increases in egg size during this period may improve the survival of later-developing progeny; prey become scarce as aphid outbreaks decline and competition intensiÞes, favoring offspring with a larger body size at eclosion. Larval diet restriction appeared to constrain these presumably adaptive changes in egg size and daily fecundity, largely through effects on maternal body size.KEY WORDS aphidophagy, egg size, fecundity, maternal effect, reproductive effort Most species in the family Coccinellidae are predaceous on other insects or mites (Hodek 1996) and many are relatively specialized predators of aphids. …”

mentioning

confidence: 99%

Larval Food Supply Constrains Female Reproductive Schedules inHippodamia convergens(Coleoptera: Coccinellidae)

Vargas

Michaud

Nechols

2012

Annals of the Entomological Society of America

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Reproductive schedules are a critical aspect of life history intrinsically linked to a speciesÕ ecology. We explored dynamic trajectories of daily fecundity, egg size, and egg fertility in three size classes of Hippodamia convergens GuerinÐMeneville produced by varying larval access to food, eggs of Ephestia kuehniella Zeller. Adult pairs were held with ad libitum food and eggs were collected daily, counted, and a subsample measured. Egg fertility declined steeply over 25 clutches in small females, gradually in large females, but remained relatively stable in medium females. In small females, egg size and daily fecundity declined in a linear manner. There was no clear indication of an egg size-number tradeoff. In medium females, both egg size and daily fecundity peaked around the 16th day of oviposition, after which both declined. Large females began oviposition earlier and achieved peak egg size about day 7, and peak fecundity around day 12. Large females thus expressed a larger proportion of their reproductive effort early in adult life, a strategy inferred to be adaptive in the context of aphidophagy; a larger proportion of progeny would develop early in the exponential growth phase of the prey population when food is most abundant. Increases in egg size during this period may improve the survival of later-developing progeny; prey become scarce as aphid outbreaks decline and competition intensiÞes, favoring offspring with a larger body size at eclosion. Larval diet restriction appeared to constrain these presumably adaptive changes in egg size and daily fecundity, largely through effects on maternal body size.KEY WORDS aphidophagy, egg size, fecundity, maternal effect, reproductive effort Most species in the family Coccinellidae are predaceous on other insects or mites (Hodek 1996) and many are relatively specialized predators of aphids.

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Food Relationships

Cited by 146 publications

References 705 publications

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

Predators and parasitoids of the harlequin ladybird, Harmonia axyridis, in its native range and invaded areas

Molecular Characterization of Ladybird Predators (Coleoptera: Coccinellidae) of Aphid Pests (Homoptera:Aphididae) in North East India

Larval Food Supply Constrains Female Reproductive Schedules inHippodamia convergens(Coleoptera: Coccinellidae)

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