Morphological, physiological, and trophic characteristics of the gypsy moth Lymantria dispar L. (Lepidoptera, Lymantriidae) larvae in relation to the hydrothermal conditions and the population density

Andreeva, E. M.; Пономарев, В. И.; Шаталин, А В

doi:10.1134/s0013873808070014

Cited by 3 publications

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“…Furthermore, it was demonstrated with different populations of L. dis par that the maternal effect and morphophysiological and trophic characteristics of the filial generation of worms is significantly influenced by the hydrothermal conditions of forage plant growth (Rossiter, 1991) in the phase of depression. This influence sharply decreases in the initial and peak outbreak phases (Andreeva et al, 2008;Ponomarev et al, 2012). Therefore, differences in the reaction norm of the population, depending on forage plant phenology and density phase, can significantly level the effect of weather factors on the dynamics of population density.…”

Section: Population Dynamics Model Of L Dispar In the Southern Uralsmentioning

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Gypsy moth Lymantria dispar L. in the southern Urals: Patterns in population dynamics and modeling

et al. 2016

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The population dynamics of gypsy moths from different habitats of the southern Urals was ana lyzed. Patterns of cyclic changes in the population density were examined. The conjugation of the time series of gypsy moth population dynamics from different habitats at the territory of the southern Urals was assessed. Relationships between the population density and weather conditions were studied. Based on the results, a statistical model of population dynamics in gypsy moth from the southern Urals was developed. The effects of regulatory and modifying factors on the population dynamics were assessed.

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Section: Population Dynamics Model Of L Dispar In the Southern Uralsmentioning

confidence: 99%

Gypsy moth Lymantria dispar L. in the southern Urals: Patterns in population dynamics and modeling

et al. 2016

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“…At the level of one micropopulation of the Gypsy moth, we have found a dependence of trophic parameters on a number of ontogenetic and population characteristics, which are determined by the conditions of the development of the parent generation [6,7]. So, when one takes the masses for further growing of the caterpillars in order to conduct the experiments under the natural conditions, one should take into consideration the following: first, we deal with the natural objects, the composition of which does not depend on the researcher; second, the structure of the population is instable, changing annually, and the results of the study also differ in different years; third, the final result depends on the methods of the experiment.…”

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“…A great number of works exist that show the influence of the host plants (the degree of suitability of various species or even clones), as well as of the structure and state of population on the trophic parameters [1][2][3][4][5][6].…”

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Certain methodical aspects of experiments studying the nutrition of caterpillars of the Gypsy moth

Andreeva

2012

Contemp. Probl. Ecol.

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It is shown that there are a number of factors that are important to consider when planning the experiments on studying the trophic parameters of the caterpillars of the Gypsy moth, first of all, the population characteristics of the species including the sex and age structure that change annually. The final results of the study are also influenced by some procedures during the experiments, particularly, the duration (especially in the longest instars of the caterpillars) and volume of the sampling, which is supposed to grow as the caterpillars instar increases. The expediency is examined for using the individual growing of the caterpillars to study the species nutrition.The attention of many experts in forest entomology is drawn to the studying of the trophic aspects of ecology of a number of species, the nutrition energy of which is researched using the calculation of trophic indices.With its Holarctic dispersal, the Gypsy moth (Lymantra dispar L.) is an object of the majority of the studies on the nutrition energy. A great number of works exist that show the influence of the host plants (the degree of suitability of various species or even clones), as well as of the structure and state of population on the trophic parameters [1-6].At the level of one micropopulation of the Gypsy moth, we have found a dependence of trophic parameters on a number of ontogenetic and population characteristics, which are determined by the conditions of the development of the parent generation [6,7]. So, when one takes the masses for further growing of the caterpillars in order to conduct the experiments under the natural conditions, one should take into consideration the following: first, we deal with the natural objects, the composition of which does not depend on the researcher; second, the structure of the population is instable, changing annually, and the results of the study also differ in different years; third, the final result depends on the methods of the experiment. At the same time, the human factor can affect greatly the final result of the study, despite the fact that the methods of the experiments differ only slightlythe caterpillars are grown on the natural or artificial food and are kept in group or single. The most variable parameter of these experiments is the duration, which changes significantly, from the total period of the larvae stage [2] or a certain instar to several days [3,8]. The results obtained by the individual growing of the caterpillars during the total period of their feeding to pupation that we performed for several years allow us to suppose that the obtained data vary depending on the duration of the experiments. The purpose of the work is to estimate which factors are to be considered when planning the experiments (population structure, certain parameters of the experiments), and how these factors can affect the final results of the study. MATERIAL AND METHODSWe studied the Trans-Ural population of the Gypsy moth (depression period). The caterpillars were grown in the laboratory from the masses...

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What can nutritional indices tell us about gypsy moth larvae (Lymantria dispar L.)?

Andreeva

2010

PESTIC PHYTOMED

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SUMMARYIn the submitted work, important factors for planning out experiments for studying nutritional indices, whose choice may affect research results, and opportunities for using the indices of feeding to study the ecology of species are evaluated. The dependence of nutritional indices on great many factors and significant variation in their absolute values over different years make possible their research only as part of a complex issue together with population factors and external conditions. A careful comparison of results from different studies is made.

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Morphological, physiological, and trophic characteristics of the gypsy moth Lymantria dispar L. (Lepidoptera, Lymantriidae) larvae in relation to the hydrothermal conditions and the population density

Cited by 3 publications

References 2 publications

Gypsy moth Lymantria dispar L. in the southern Urals: Patterns in population dynamics and modeling

Gypsy moth Lymantria dispar L. in the southern Urals: Patterns in population dynamics and modeling

Certain methodical aspects of experiments studying the nutrition of caterpillars of the Gypsy moth

What can nutritional indices tell us about gypsy moth larvae (Lymantria dispar L.)?

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