Interspecific size regularities in tropical felid assemblages.

Area of Science:

• Ecology
• Zoology
• Comparative Biology

Background:

• Previous research analyzed size relationships in Neotropical cats.
• Felid assemblages in tropical Africa and Asia present an opportunity for comparative analysis.

Purpose of the Study:

• To extend the analysis of size relationships to felid assemblages in tropical Africa and Asia.
• To investigate size ratios and potential niche partitioning among African and Asian cat species.

Main Methods:

• Jaw length was used as the primary measure of body size, correlating with modal prey size.
• Felid assemblages were analyzed for size ratios, treating "convergent" species (indistinguishable jaw length) separately and combined.

Main Results:

• African and Asian felid assemblages show a tendency for larger average size ratios than expected by random assembly, especially among larger species.
• Extreme evenness in size ratios, as seen in Neotropical cats, was not replicated in these assemblages.
• Convergent species pairs often exhibit differences in coat coloration (dappled vs. plain), suggesting potential divergence in habitat use or predatory behavior.

Conclusions:

• Size ratio patterns in African and Asian felids may reflect greater prey size variance or limited niche segregation alternatives for larger species.
• The significance of size ratio regularity, particularly when merging convergent species, requires further investigation into their specific ecological habits.
• Coat pattern differences hint at underlying niche differentiation within convergent felid pairs.