Mosaicism and chimerism as components of intraorganismal genetic heterogeneity.
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Adaptation, Biological↗
Biomedical subjects
B Santelices
Publications and source records attributed to B Santelices.
How many kinds of individual are there?
The concept of the individual links population biology with darwinian selection. In spite of its importance, the concept is used with great ambiguity. Confusions seemingly stem from a limited analysis of the variability found in attributes classically used to characterize individuality. Such characterization involves the simultaneous holding of genetic uniqueness, genetic homogeneity and autonomy, which in turn are considered invariant attributes. Data accumulated over the past 15 years, however, indicate that all three characters can independently be present or absent in different types of multicellular organism. Combining their respective presence or absence leads to recognizing different kinds of individual; a realization that has ecological and evolutionary implications.
Journal Article↗
[Quantitative sampling of intertidal communities in central Chile].
Most studies on chilean intertidal communities are qualitative or semiquantitative descriptions of species associations and zonation patterns. Although quantitative studies allow a finer understanding of structure and organization of intertidal communities they have been performed only infrequently in Chile. This review is primarily concerned with some of the problems involved in applying quantitative sampling to intertidal organisms. Major problems in this field are the recognition of boundaries of the intertidal communities, the use of the minimal area concept in these habitats, the determination of quadrant and sample size and selection of the attributes to be measured in the population. Results so far gathered in several different habitats do not support the currently accepted hypothesis on the uniformity of zonation patterns supposed for most of the coast of northern and central Chile.
Animals↗