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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
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Convergent Evolution01:54

Convergent 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...
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Evolution of New Traits in Microbes01:24

Evolution 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...
The Evidence for Evolution02:55

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.The collection of fossils within sedimentary rocks give a record of common ancestry and often depicts the history of evolution.
What is Evolutionary History?02:35

What is Evolutionary History?

Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.Phylogenetic trees illustrate the evolutionary relationships among these organisms. Scientists infer organisms’ common ancestry by evaluating shared morphological and genetic characteristics. Together, the fossil...

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Updated: Jun 5, 2026

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

Published on: August 22, 2022

Social evolution in toothed whales.

R C Connor1, J Mann, P L Tyack

  • 1Biology Dept, UMASS-Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02748, USA.

Trends in Ecology & Evolution
|January 18, 2011
PubMed
Summary
This summary is machine-generated.

Odontocete (toothed whale) social systems show both similarities and unique adaptations compared to land mammals. This research offers insights into social evolution across diverse habitats.

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Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton
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Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton

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Last Updated: Jun 5, 2026

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07:26

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Published on: August 22, 2022

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08:02

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Published on: May 7, 2016

Area of Science:

  • Comparative social behavior
  • Marine mammal ethology
  • Evolutionary biology

Background:

  • Understanding the evolution of social systems requires comparing diverse species.
  • Odontocetes (toothed whales) present unique ecological challenges and opportunities for sociality.
  • Previous research has explored social structures in both terrestrial and marine animals separately.

Purpose of the Study:

  • To compare the social systems of select odontocetes with those of terrestrial mammals.
  • To identify convergent and novel social structures in aquatic environments.
  • To explore the ecological determinants of social systems and their relation to brain evolution.

Main Methods:

  • Comparative analysis of social system data from odontocetes (e.g., sperm whales, bottlenose dolphins, killer whales, Baird's beaked whales).
  • Comparison with social system data from terrestrial mammals (e.g., elephants, chimpanzees).
  • Identification of convergent traits and unique adaptations in social organization.

Main Results:

  • Significant convergence observed between some odontocetes (sperm whale, bottlenose dolphin) and terrestrial mammals (elephant, chimpanzee).
  • Novel social structures identified in other odontocetes (killer whale, Baird's beaked whale) as adaptations to aquatic life.
  • Odontocete social systems exhibit a mix of convergent and unique evolutionary pathways.

Conclusions:

  • Odontocete social systems offer a dual perspective: evidence of convergent evolution and unique adaptations to marine environments.
  • Studying these contrasting patterns enhances our general understanding of social system drivers in both aquatic and terrestrial habitats.
  • Findings contribute to understanding the link between relative brain size, social complexity, and evolutionary strategies.