Researches on Population Ecology
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
Vertical foodweb structure of freshwater zooplankton assemblages estimated by stable nitrogen isotopes
Researches on Population Ecology - Tập 38 - Trang 283-287 - 1996
Although theoretical foodweb models predict the presence of only three to four
trophic categories, estimation of “potential” vertical foodweb structure from
species lists and inferred feeding interactions suggest that as many as 7
trophic categories can occur in the pelagic foodwebs of North American glaciated
lakes. A compilation of data on the nitrogen isotopic composition of zooplankton
from 46...
Evolution of condition-dependent dispersal: A genetic-algorithm search for the ESS reaction norm
Researches on Population Ecology - Tập 39 - Trang 127-137 - 1997
Many insects produce two types (winged and wingless) of offspring that greatly
differ in dispersal ability. The ratio of the two types often depends on the
quality of the local habitat and the crowding experienced by the mother. Here we
studied the condition-dependent dispersal that is evolutionarily stable. The
model is also applicable to annual plants that produce two types of seeds
differing in...
The spatial distribution of the wheat-bulb fly,Leptohylemyia coarctata (fall.) (Diptera: Anthomyiidae)
Researches on Population Ecology - Tập 16 - Trang 127-131 - 1974
The spatial distribution of the eggs, larvae, pupae and adults of the wheat-bulb
fly was investigated by fitting 42 sets of data comprising 1334 samples to the
Poisson and negative binomial distributions, and by using the power law (S 2 =am
b ). In general, the tests indicated that all stages were aggregated and fitted
the negative binomial model....
The evolution of dispersal polymorphisms in insects: The influence of habitats, host plants and mates
Researches on Population Ecology - Tập 36 - Trang 127-135 - 1994
Wing-dimorphic, delphacid planthoppers were used to test hypotheses concerning
the effects of habitat persistence and architectural complexity on the
occurrence of dispersal. For reasons concerning both the durational stability of
the habitat and the reduced availability of mates, selection has favored high
levels of dispersal in species occupying temporary habitats. Flightlessness
predominates in...
Comparative study of density regulation in confined populations of four species of rodents
Researches on Population Ecology - Tập 7 - Trang 57-72 - 1965
Biology ofhyphantria cunea drury (lepidoptera : Arctiidae) in Japan. IX. population dynamics
Researches on Population Ecology - Tập 11 - Trang 211-228 - 1969
Fluctuations in population density ofHyphantria cunea in Japan are characterized
by a gradation-like pattern. Analysis of the life table data taken from two
stations during eight successive generations showed that (1) mortality during
egg and early larval stages was density-independent, (2) mortality during later
larval stages wasinversely density-dependent, and (3) mortality during prepupal
and p...
A simple model of host-parasitoid interaction with host-feeding
Researches on Population Ecology - Tập 30 - Trang 353-369 - 1988
A simple mathematical model of host-parasitoid interaction with host-feeding was
presented with special reference to the system of the greenhouse whitefly and
the parasitoidEncarsia formosa. In the model, when a parasitoid encounters a
host, it has a choice between feeding the host and ovipositing one egg in the
host. It was shown that an intermediate value of the feeding ratio of all
attacks give...
Consequences of competition on the reproduction and mortality of three species of terrestrial slugs
Researches on Population Ecology - Tập 25 - Trang 20-43 - 1983
The interaction of three species of terrestrial slugs was studied in six field
cages containing monocultures and 2-way combinations.A. columbianus andA. ater
were non-aggressive species andL. maximus was highly aggressive during the
summer. All three species were similar in body design and resource utilization.
Reproduction (egg size, eggs/batch, number of batches, wet-weight productivity)
and mor...
An approach to the edge effect in proof of the validity ofDice's assessment lines in small-mammal censusing
Researches on Population Ecology - Tập 15 - Trang 121-137 - 1973
A second fieldwork for the sake of solving the edge-effect subject was carried
out in almost the same ways and plans in summer of 1971 in succession to that of
1970. It was found out that the population density was reduced to two-thirds,
but the data were sufficient to form the subsequent conclusions:...
Studies on the interference among larvae of the citrus leaf miner,Phyllocnistis citrella stainton (lepidoptera: Phyllocnistidae)
Researches on Population Ecology - Tập 16 - Trang 80-111 - 1974
Observation of the citrus leaf miner,Phyllocnistis citrella Stainton suggested
that contacts among larvae frequently occur and either of two larvae encountered
is sometimes killed by the interference. A model to describe the competitive
interactions in the process of interference was constracted with this species.
The distribution of hatchling on an area was considered in the model. The model
was ...
Tổng số: 497
- 1
- 2
- 3
- 4
- 5
- 6
- 10