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Key Dates

Late Registration
Fees Imposed

Beginning 1 April 2012

Program and Schedules Available
April 2012

Meeting
20-24 May 2012

Covich, A. P., University of Georgia, Athens, USA, alanc@uga.edu

ON THE ROLE OF OMNIVOROUS FRESHWATER CRABS IN NEOTROPICAL STREAMS

Field evidence from Neotropical streams demonstrates that crab species exploit a wide range of plant and animal food resources as they mature. Epilobocera sinuatifrons (A.Milne Edwards 1866) is a widely distributed species in streams of Puerto Rico and Saint Croix in the U.S. Virgin Islands. Their life history is not dependent on access to estuarine habitats as is the case for most freshwater shrimps. The young undergo direct development and parental investment by females provides protection of the relatively large eggs and youngest, post-hatch juvenile stages. One example of their role in stream food webs is adult crab predation on freshwater snails. More than other freshwater decapods, such as crayfish and river shrimp, tropical freshwater crabs use their claws to break a wide range of shell sizes and thicknesses. Preliminary laboratory studies of predation by E. sinuatifrons on planorbid snails indicates there is no prey size limitation nor is there any evidence of behavioral escape behavior (e.g. crawling out of the water or seeking cover) as has often been observed in predation by crayfishes.

Oral presentation

Session #:T20
Date: 5/24/2012
Time: 14:30

Presentation is given by student: No

Presenting authors are bolded.