Location

Stephen F Austin State University, Baker Pattillo Student Center Theater and Twilight Ballroom

Start Date

15-4-2025 4:00 PM

End Date

15-4-2025 7:00 PM

Description

Rivers of the Guiana Shield in South America are very heterogenous, containing a mosaic of habitats and environmental characteristics ideal for maintaining high freshwater biodiversity. The connection between the Essequibo and Amazon rivers via the Rupununi River during the wet season plays an important role for the great diversity of Neotropical ichthyofauna. Neotropical catfishes (Siluriformes) are the second most diverse group of freshwater fishes, after the Characiformes. They span a wide range of body sizes and exhibit diverse trophic specializations, making them ideal organisms for studying the influence of body size variation on community organization and ecosystem function. We explored the taxonomic, functional, and feeding ecology among neotropical catfishes in two rivers in Guyana to examine overall feeding diversity and relationships between body size and trophic position of catfish species in these rivers.

Comments

Faculty Sponsor: Carmen Montana Schalk (Department of Biology)

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Apr 15th, 4:00 PM Apr 15th, 7:00 PM

Neotropical catfish diversity in rivers of the Guiana Shield: A Combined Approach Using Taxonomic, Functional, and Isotopic Tools

Stephen F Austin State University, Baker Pattillo Student Center Theater and Twilight Ballroom

Rivers of the Guiana Shield in South America are very heterogenous, containing a mosaic of habitats and environmental characteristics ideal for maintaining high freshwater biodiversity. The connection between the Essequibo and Amazon rivers via the Rupununi River during the wet season plays an important role for the great diversity of Neotropical ichthyofauna. Neotropical catfishes (Siluriformes) are the second most diverse group of freshwater fishes, after the Characiformes. They span a wide range of body sizes and exhibit diverse trophic specializations, making them ideal organisms for studying the influence of body size variation on community organization and ecosystem function. We explored the taxonomic, functional, and feeding ecology among neotropical catfishes in two rivers in Guyana to examine overall feeding diversity and relationships between body size and trophic position of catfish species in these rivers.

 

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