Population Ecology
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Are there genetically controlled habitat-specific differences in spatial aggregation of drosophilids?
Population Ecology - Tập 46 - Trang 269-274 - 2004
Variation in spatial patterns of competing organisms is of fundamental importance for community and population processes. Yet the mechanisms controlling subjects like the degree of spatial aggregation in competing insect larvae across fragmented resources have rarely been addressed. In the present study, we tested for systematic differences in the spatial distribution patterns of Drosophila subobs......
Dispersal and habitat cuing of Eurasian red squirrels in fragmented habitats
Population Ecology - Tập 52 - Trang 527-536 - 2010
Animal dispersal and subsequent settlement is a key process in the life history of many organisms, when individuals use demographic and environmental cues to target post-dispersal habitats where fitness will be highest. To investigate the hypothesis that environmental disturbance (habitat fragmentation) may alter these cues, we compared dispersal patterns of 60 red squirrels (Sciurus vulgaris) in ......
Conspecific host discrimination by ovipositing Euphydryas editha butterflies: Its nature and its consequences for offspring survivorshipSummary Ovipositing E. editha butterflies display post‐alighting discrimination among patches of Collinsia torreyi , one of their major hosts in the General's Highway (GH) population at a montane site in California. Females tended to accept (i.e. oviposit on) dense patches of this host and to reject sparse patches... ...
Population Ecology - Tập 27 Số 1 - Trang 87-98 - 1985
Herbivory damage does not indirectly influence the composition or excretion of aphid honeydew
Population Ecology - Tập 48 - Trang 245-250 - 2006
Recent research has shown that extrafloral nectar secretion by plants, which also attracts ants, is a defense inducible by herbivory damage. Our research addresses the question of whether plants can manipulate the honeydew secretions of homopterans as an inducible defense in response to herbivory in the same manner as extrafloral nectaries. We investigated changes in honeydew composition and excre......
The ingestion in wolf spiders II. The expression of degree of hunger and amount of ingestion in relation to spider's hungerSummary To express the degree of hunger during both of feeding and unfeeding periods of spiders, equations for the amount of ingestion and food disappearance from the gut were presented using three components: capacity of gut, rate of ingestion and rate of food disappearance. The degree of hunger was expressed by the rate of unfilled capacity of gut to the capacity ... ...
Population Ecology - - 1972
The relative importance of sexual and clonal reproduction for population growth in the perennial herb Fragaria vesca
Population Ecology - Tập 54 - Trang 369-380 - 2012
The relative importance of sexual and clonal reproduction for population growth in clonal plants is highly variable. Clonal reproduction is often more important than sexual reproduction but there is considerable interspecific variation and the importance of the two reproductive modes can change with environmental conditions. We carried out a demographic study on the woodland strawberry (Fragaria v......
Linkages among trait‐mediated indirect effects: a new framework for the indirect interaction webAbstract Plants have diverse ways of responding to damage by herbivores, such as changes in allelochemistry, physiology, morphology, growth, and phenology. These responses form the mechanistic basis for trait‐mediated indirect interactions (TMIIs) between organisms on the plants. There is a growing appreciation that such TMIIs form complex networks (i.e., indirect i... ...
Population Ecology - - 2010
Spread of the pinewood nematode vectored by the Japanese pine sawyer: modeling and analytical approaches
Population Ecology - Tập 48 - Trang 271-283 - 2006
The pinewood nematode, Bursaphelenchus xylophilus, is the causative agent of pine wilt of Pinus thunbergii and P. densiflora in Japan. The nematode is vectored by cerambycid beetles of the genus Monochamus. It is inferred to have been introduced from North America early in the 1900s and then to have distributed in China, Korea, and Taiwan. Intensive and/or long-term studies of pine wilt systems ha......
Evaluating the potential biases in carnivore capture–recapture studies associated with the use of lure and varying density estimation techniques using photographic-sampling data of the Malagasy civet
Population Ecology - Tập 54 - Trang 43-54 - 2011
Estimating density of elusive carnivores with capture–recapture analyses is increasingly common. However, providing unbiased and precise estimates is still a challenge due to uncertainties arising from the use of (1) bait or lure to attract animals to the detection device and (2) ad hoc boundary-strip methods to compensate for edge effects in area estimation. We used photographic-sampling data of ......
The influence of pheromones produced by freely growing laboratory populations on the reproductive maturation of prairie deermice following prenatal and postnatal exposureSummary Significantly more females reared on bedding soiled by different populations reproduced by 100 days of age than those reared on bedding soiled by the same populations (P <.1) or on clean bedding (P <.025) whereas the latter two groups did not differ significantly. Significantly greater percentages of ... ...
Population Ecology - - 1977
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