Spotted Eagle Ray Research and Conservation

Life History

The spotted eagle ray is considered a data deficient species and its distribution, migration, feeding habits, growth rates and reproductive biology are poorly defined. The objectives of our study focus on collecting important life history information including size, weight and sexual maturity status. Our program is the first to collect growth rates on recaptured free-ranging rays and this information is critical to guide management decisions for this species.

Fisheries Impacts

Spotted eagle rays are harvested in targeted fisheries in the Gulf of Mexico and Caribbean Sea. The sustainability of these fisheries is in doubt given the life history and limited reproductive capacity of this species. Our research team is working with colleagues in Mexico and Cuba to better understand the impacts from these fisheries and to collect more information on life history and population structure. Working with fishermen towards a sustainable harvest is an important goal.

Conservation Genetics

We are collecting DNA sequence and genotype data from spotted eagle rays in the Gulf of Mexico and northern Caribbean Sea in order to investigate the genetic structure and seasonal migration patterns of populations. In addition, we are collecting genetic samples from sympatric, near-relative species, such as the Atlantic devil ray and cownose ray. Comparing interspecific genetic diversity estimates will help us to evaluate the relative evolutionary response of these populations to changing environmental conditions and fishing pressures.