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Introduction to Special Section on Research Activities at the Iztacala Campus of the Universidad Nacional Autónoma de México, México
Mark S. Peterson and Nancy J. Brown-Peterson

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Argulus yucatanus N. Sp. (Crustacea: Branchiura) Parasitic on Cichlasoma urophthalmus from Yucatan, Mexico
William J. Poly

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Fishery and Biology of Blackfin Tuna Thunnus atlanticus off Northeastern Brazil
Katia M.F. Freire, Rosangela Lessa, and Jorge Eduardo Lins-Oliveira

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Coastal Origin of Common Snook, Centropomus undecimalis, in Florida Bay
Heather M. Patterson, Ronald G. Taylor, and Richard S. McBride

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Parasites of the American White Pelican
Robin M. Overstreet and Stephen S. Curran

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Ecology of the Rock Shrimp Sicyonia dorsalis Kingsley, 1878 (Crustacea: Sicyoniidae) in a Subtropical Region of Brazil
Rogerio Caetano da Costa, Adilson Fransozo, and Maria Lucia Negreiros-Fransozo

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Distribution of Myodocopid Ostracods in Tampa Bay, Florida, and Association with Abiotic Variables
Stephen A. Grabe

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Manatee Occurrence in the Northern Gulf of Mexico, West of Florida
D. Fertl, A.J. Schiro, G.T. Regan, C.A. Beck, N. Adimey, L. Price-May, A. Amos, G.A.J. Worthy, and R. Crossland

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High Cyanobacterial Abundance in Three Northeastern Gulf of Mexico Estuaries
Michael C. Murrell and Jane M. Caffrey

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Ecology of the Mayan Cichlid, Cichlasoma urophthalmus Günther, in the Alvarado Lagoonal System, Veracruz, Mexico
Rafael Chavez-Lopez, Mark S. Peterson, Nancy J. Brown-Peterson, Ana Adalia Morales-Gomez, and Jonathan Franco-Lopez

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Seasonal and Spatial Patterns in Salinity, Nutrients, and Chlorophyll α in the Alvarado Lagoonal System, Veracruz, Mexico
Angel Moran-Silva, Luis Antonio Martinez Franco, Rafael Chavez-Lopez, Jonathan Franco-Lopez, Carlos M. Bedia-Sanchez, Francisco Contreras Espinosa, Francisco Gutierrez Mendieta, Nancy J. Brown-Peterson, and Mark S. Peterson

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Long-Term Fish Assemblage Dynamics of the Alvarado Lagoon Estuary, Veracruz, Mexico
Rafael Chavez-Lopez, Jonathan Franco-Lopez, Angel Moran-Silva, and Martin T. O'Connell

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Trophic Relationships of Demersal Fishes in the Shrimping Zone Off Alvarado Lagoon, Veracruz, Mexico
Edgar Pelaez-Rodriguez, Jonathan Franco-Lopez, Wilfredo A. Matamoros, Rafael Chavez-Lopez, and Nancy J. Brown-Peterson

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Selected Life-History Observations on the Cayman Gambusia, Gambusia xanthosoma Greenfield, 1983 (Poeciliidae)
Michael A. Abney, Richard W. Heard, and Chet F. Rakocinski

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First Report of the Mayan Cichlid, Cichlasoma urophthalmus (Günther 1862) Collected in the Southern Littoral Zone of Lake Okeechobee, Florida
Wilfredo A. Matamoros, Keith D. Chin, and Bruce Sharfstein

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Recent Observations of the Whale Shark (Rhincodon typus) in the Northcentral Gulf of Mexico
Eric R. Hoffmayer, James S. Franks, and John P. Shelley