Related Experiment Video
Updated: Aug 3, 2026
06:00
Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila
Published on: October 1, 2011
Correlates of body mass evolution in primates
1Human Origins Group, Department of Palaeontology, Natural History Museum, London SW7 5BD, UK. C.Soligo@nhm.ac.uk
American Journal of Physical Anthropology
|January 6, 2006
Summary
Plesiadapiforms evolved towards larger body mass, following Cope
Area of Science:
- Paleontology
- Evolutionary Biology
- Primate Evolution
Background:
- Body mass is a key adaptive trait, but evolutionary drivers are poorly understood.
- Cope's rule suggests a trend towards increasing body mass in lineages.
- Environmental factors like climate and competition may influence body mass evolution.
Purpose of the Study:
- To investigate evolutionary trends in body mass in plesiadapiforms and primates.
- To determine if environmental factors correlate with body mass evolution in these groups.
- To test Cope's rule in plesiadapiforms and primate radiations.
Main Methods:
- Analysis of the global fossil record of plesiadapiforms and primates.
- Examination of body mass trends in relation to Cope's rule.
- Correlation analysis with environmental factors (latitude, global temperature).
Main Results:
- Plesiadapiforms exhibited a trend of increasing body mass, consistent with Cope's rule.
- Primates (overall and specific radiations) showed no directional body mass trends.
- Primate body mass evolution did not correlate with latitude or temperature changes.
- Interspecific competition between omomyiforms and adapiforms impacted omomyiform body mass evolution.
Conclusions:
- Cope's rule applies to plesiadapiforms but not to primates.
- Environmental factors like climate do not appear to drive primate body mass evolution.
- Interspecific competition played a role in shaping body mass evolution within primate radiations.
Related Concept Videos
01:07Speciation Rates
Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.
01:54Convergent Evolution
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.The structures that arise from convergent evolution are called analogous structures. They are similar in function even if they are dissimilar in structure. Further, structures can be analogous while also...
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
01:19Mass and Weight
Mass and weight are often used interchangeably in everyday conversation. For example, medical records often show our weight in kilograms, but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of the Earth on an object. It depends on the distance from the center of the Earth. Weight dramatically varies if we leave the Earth's surface, unlike mass, which does not vary with location. On the Moon, for example, the acceleration due to...
01:20Evolutionary Psychology
Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
01:24Evolution of New Traits in Microbes
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...