Aquatic Insect Assemblages in Shrimp-dominated Tropical Streams, Puerto Rico1

Alonso Ramírez; Luz Raquel Hernández-Cruz

doi:10.1646/02155-Q1561

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Alonso Ramírez,^1,* Luz Raquel Hernández-Cruz¹

¹Institute for Tropical Ecosystem Studies University of Puerto Rico P.O. Box 23341 San Juan, Puerto R

^*Corresponding author: Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 23341, San Juan, Puerto Rico 00931, U.S.A. aramirez@sunites.upr.clu.edu

Abstract

We examined the effects of shrimp on insects in Puerto Rico by assessing insect assemblages in streams relative to varying shrimp densities and also by manipulating shrimp presence. Insect assemblages were typical of tropical island streams and insects were found in all stream habitats. Shrimp impacted insects directly via predation and competition and indirectly through removing particles from the water column. Variation in shrimp distribution is likely to be an important factor determining insect-assemblage structure in tropical streams.

Citation Download Citation

Alonso Ramírez and Luz Raquel Hernández-Cruz "Aquatic Insect Assemblages in Shrimp-dominated Tropical Streams, Puerto Rico," BIOTROPICA 36(2), 259-266, (1 June 2004). https://doi.org/10.1646/02155-Q1561

Published: 1 June 2004