Researches on Population Ecology
1437-5613
0034-5466
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Các bài báo tiêu biểu
The genetics and ecology of sympatric speciation: A case study
Tập 40 - Trang 175-187 - 1998
Mating occurs on the larval host plant in allRhagoletis species (Diptera: Tephritidae). We show how this attribute, when coupled with certain differences in other biological traits, strongly influences the mode of speciation. In species of thesuavis species group, host shifts have never occurred during speciation, and larvae feed in the husks of any walnut species(Juglans spp.), which are highly t......
Territory establishment of young bio-clawed shrew,Sorex unguiculatus (Dobson) (Insectivora, Soricidae)
Tập 30 - Trang 83-93 - 1988
A model of the plant-to-plant movement of aphids I. Description of the model
Tập 9 - Trang 53-61 - 1967
The plant-to-plant movement of insects in one of the factors determining the distribution of individuals in insect populations. In this report the movement of barley aphids was analyzed by a statistical model. The model is represented as the convolution of three probability functions:
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The biology of the voleClethrionomys rufocanus: A review
Tập 40 - Trang 21-37 - 1998
The biology of the gray-sided voleClethrionomys rufocanus in Hokkaido, concerning taxonomy, morphology, phylogeny, distribution, and natural history, is reviewed. Applied issues in forest management (damage, control and census) are also mentioned. AlthoughClethrionomys rufocanus of Hokkaido was originally identified as a distinct species,Evotomys (=nowClethrionomys) bedfordiae Thomas, 1905, curren......
Epizootiology of virus diseases in three lepidopterous insect species of alfalfa
Tập 16 - Trang 59-68 - 1974
The incidence of virus infections in three lepidopterous insect species was studied from 1965 to 1968 in alfalfa fields in California. The insects were the alfalfa caterpillar,Colias eurytheme; the beet armyworm,Spodoptera exigua; and the alfalfa looper,Autographa californica. InC. eurytheme, the major virus was a nuclear polyhedrosis virus (NPV); inS. exigua, a granulosis virus (GV) and an NPV; i......
The estimation of the fitness function from two samples taken from a population
Tập 16 - Trang 219-230 - 1975
The fitness of animals subjected to natural selection can be defined as the probability of surviving selection for a given interval of time, or some convenient multiple of this probability. If the fitness of animals is related to some quantitative variableX (such as size) then this relationship is expressed mathematically in the fitness functionw(x) and this function can be estimated by comparing ......
Distribution patterns of and sampling plans forTetranychus urticae Koch (Acarina: Tetranychidae) on roses
Tập 33 - Trang 229-243 - 1991
I sampledTetranychus urticae Koch (Acarina: Tetranychidae) regularly from four rose gardens in Kyoto and Nara Prefectures in 1988–1990. When mite density was low,T. urticae showed an uneven vertical distribution, being more abundant in the lower third and absent from the upper third of the plants. Mite density was less variable within than between plants, suggesting that a sampling plan which incl......
Genetic changes of life history and behavioral traits during mass-rearing in the melon Fly,Bactrocera cucurbitae (Diptera: Tephritidae)
- 1998
Quantitative genetic studies for life history and behavioral traits are important in quality control for insect mass-rearing programs. Firstly, a brief history of quality control in mass-reared insects is described. Next, the differentiation of many traits of wild and mass-reared melon flies,Bactrocera cucurbitae, in Okinawa is reviewed, and the factors which have caused variation in these traits ......
The estimation of population density of the green rice leafhopper,Nephotettix cinticeps Uhler, in spring field by the capture recapture method
Tập 9 - Trang 113-129 - 1967
The population parameters of green rice leafhopper,Nephotettix cincticeps in hibernated generation was estimated by the capture-recapture method on the gramineous weeds of resting paddy field from late in April to mid-May, 1962–1965. The difficulty of applying the capture-recapture method to this insect is caused from the low density and the low activity of the leafhopper, so that it is necessary ......
Life history traits of pest and non-pest populations in the phytophagous ladybird beetle,Epilachna niponica (coleoptera, coccinellidae)
Tập 39 - Trang 163-171 - 1997
Life history traits of the phytophagous ladybird beetle,Epilachna niponica were compared between a non-pest population feeding on wild thistle and a pest population feeding on cultivated solanaceous crops, mainly potato. The pest population had larger females, a higher population growth rate, a more continuous oviposition schedule, and a shorter developmental period in the immature stages, compare......