Results 161 to 170 of about 133,288 (210)
Some of the next articles are maybe not open access.
Intraspecific variation in striatites spores
Journal of Palaeosciences, 1971Undispersed spores from sporangia of Arberiella were isolated to study variations in their form caused by compression and maceration in order to assess the systematic importance of such variations in the demarcation of species of Sporae dispersae. The effect of maceration was also studied in spores of two living conifers Pimts roxburghii and Cedrus ...
D.D. Pant, Suman Bhatnagar
openaire +1 more source
Host plant intraspecific variation determines gall traits
Plant Biology, 2022ABSTRACT Galls display a multiplicity of traits, including colours, which are driven by pigment accumulation. Their conspicuousness has attracted researchers' attention and several hypotheses have been raised. However, plants themselves vary intra‐specifically, including in their pigment concentrations.
J. C. F. Cardoso +3 more
openaire +2 more sources
Intraspecific Variation in Seed Packaging
American Midland Naturalist, 1990Seed biomass, seed number and biomass of "packaging" (dispersal and protective devices associated with those seeds) were determined for 28 species of flowering plants. Individual variation in average seed packaging investment was marked in almost all species we surveyed. Furthermore, the pattern of biomass investment in dispersal devices and protective
Mary F. Willson +6 more
openaire +1 more source
Defining and interpreting intraspecific molecular variation
Veterinary Parasitology, 2001Defining the extent and character of intraspecific genetic variation provides important information about gene function and organismal history. Powerful tests may be applied to sequenced alleles in order to critically examine whether natural selection is responsible for limiting or elevating intraspecific polymorphism in particular genes ...
openaire +2 more sources
Genetic intraspecific variations
2013Certain variable characters are found that are not known to be affected by any environmental condition and are presumably under genetic control. They are of a rather minor nature, and their presence or absence does not obscure the identity of the species.
openaire +1 more source
Intraspecific variation of isoenzymes in Taenia taeniaeformis
International Journal for Parasitology, 1995The technique of isoenzyme electrophoresis was applied to Japanese wild populations of Taenia taeniaeformis (isolated from Norway rats) and three laboratory reared isolates (KRN isolated from a Malaysian Norway rat, BMM from a Belgian house mouse and ACR from a Japanese gray red-backed vole).
M, Okamoto +5 more
openaire +2 more sources
Interspecific and Intraspecific Variation in Cercariae Release
Journal of Parasitology, 2009Given the importance of temperature for the shedding of trematode infective stages (cercariae) from gastropod first intermediate hosts, we investigated the response to temperature increases of trematodes of the intertidal snail Zeacumantus subcarinatus collected from different latitudes (differing in mean annual summer temperature) on the South Island ...
J, Koprivnikar, R, Poulin
openaire +2 more sources
Intraspecific Variation in Parasitic Flatworms
Systematic Zoology, 1957AT THE outset of our discussion it 11 would be useful, I believe, to stake out the areas and list the items on which there is general agreement. It is admitted that species exist, and that the species is the basic unit in taxonomy. Further, it is agreed that taxonomy has two primary functions or obligations, one of which is to designate each species in
openaire +1 more source
Intraspecific variation in primate vocalizations.
The Journal of the Acoustical Society of America, 1996Intraspecific variability in primate vocalizations exists at several levels—within organizational levels of a species, as well as differingly across acoustic variables. This paper reviews signal variability between subspecies, groups and populations, individuals, and within a single individual’s vocalizations.
openaire +1 more source
Intraspecific Variation in Parasitic Protozoa
Systematic Zoology, 1957I BELIEVE it was the late Dr. N. A. Cobb who once told a group of graduate students, of whom I was one, that it should be a part of the doctoral requirements for each candidate to describe at least one new species. What he had in mind, I am sure, was not simply the discovery of more kinds of living things, nor even the training of biologists versatile ...
openaire +1 more source