Items 31-40 of 1254
Unsuspected diversity of Niphargus amphipods in the chemoautotrophic cave ecosystem of Frasassi, central Italy
Background The sulfide-rich Frasassi caves in central Italy contain a rare example of a freshwater ecosystem supported entirely by chemoautotrophy. Niphargus ictus, the sole amphipod species previously reported from this ...
Observations on the population structure and behaviour of two differently managed populations of the greater kudu (Tragelaphus strepsiceros, Pallas 1766) in Namibia
Observations were made on two populations of the greater kudu (Tragelaphus strepsiceros) in Namibia to investigate the influence of differing management strategies (trophy hunting vs. venison production) on the population ...
Minor changes in orthopteran assemblages of Central European protected dry grasslands during the last 40 years
(Springer Netherlands, 2011)
During the past 50 years development of farming practices caused tremendous changes in European agricultural landscapes and many insect species became increasingly restricted to protected areas. Yet little is known about ...
Effects of anionic polyacrylamide on maize growth: a short term 14C labeling study
(Springer Netherlands, 2011)
Various anionic polyacrylamide polymers (PAMs) are frequently used to improve soil properties and reduce erosion. However, the effects of their application on plant growth remain unclear.Aggregate-free loess with high water ...
Comparing sequences without using alignments: application to HIV/SIV subtyping
Background: In general, the construction of trees is based on sequence alignments. This procedure, however, leads to loss of information when parts of sequence alignments (for instance ambiguous regions) are deleted before ...
Improved coverage of cDNA-AFLP by sequential digestion of immobilized cDNA
Background: cDNA-AFLP is a transcriptomics technique which does not require prior sequence information and can therefore be used as a gene discovery tool. The method is based on selective amplification of cDNA fragments ...
Physiological variability of auditory neurons in a grasshopper
Diversity Measures in Environmental Sequences Are Highly Dependent on Alignment Quality—Data from ITS and New LSU Primers Targeting Basidiomycetes
The ribosomal DNA comprised of the ITS1-5.8S-ITS2 regions is widely used as a fungal marker in molecular ecology and systematics but cannot be aligned with confidence across genetically distant taxa. In order to study the ...
Combined expectancies: electrophysiological evidence for the adjustment of expectancy effects.
(BioMed Central, 2006)
BACKGROUND: When subjects use cues to prepare for a likely stimulus or a likely response, reaction times are facilitated by valid cues but prolonged by invalid cues. In studies on combined expectancy effects, two cues can ...
Genetic and Demographic Consequences of a Rapid Reduction in Population Size in a Solitary Lemur (Mirza coquereli)
Population bottlenecks as a result of habitat fragmentation or other anthropogenic disturbances are increasingly common, but their consequences remain poorly studied. We studied the genetic population structure of a ...