v. 7, n. 4,

October / December 2009

A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin

Horácio Ferreira Júlio Júnior, Claudenice Dei Tós, Ângelo Antonio Agostinho and Carla Simone Pavanelli

A new species of Gymnotus (Gymnotiformes: Gymnotidae) from the Fitzcarrald Arch of southeastern Peru

Emmanuel L. Maxime and James S. Albert

A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil

Carla Simone Pavanelli and Carlos Alexandre Miranda Oliveira

Age and growth of Spanish mackerel (Scomberomorus brasiliensis) off the northeastern coast of Brazil

Marcelo Francisco de Nóbrega and Rosangela Paula Lessa

Aquatic insects as the main food resource of fish the community in a Neotropical reservoir

Ana Paula Vidotto-Magnoni and Edmir Daniel Carvalho

Biogeography and comparative cytogenetics between two populations of Hoplias malabaricus (Bloch, 1794) (Ostariophysi: Erythrinidae) from coastal basins in the State of Bahia, Brazil

Uedson Pereira Jacobina, Paulo Roberto Antunes de Mello Affonso, Paulo Luiz Souza Carneiro and Jorge Abdala Dergam

Chromosome polymorphism in Ancistrus cuiabae Knaack, 1999 (Siluriformes: Loricariidae: Ancistrini)

Sandra Mariotto, Liano Centofante, Carlos S. Miyazawa, Luiz Antonio Carlos Bertollo and Orlando Moreira Filho

Color changing and behavioral context in the Amazonian Dwarf Cichlid Apistogramma hippolytae (Perciformes)

Raoni Rosa Rodrigues, Lucélia Nobre Carvalho, Jansen Zuanon and Kleber Del-Claro

Cost of territorial maintenance by Parodon nasus (Osteichthyes: Parodontidae) in a Neotropical stream

Samuel Elias Silva, Wilhan R. C. Assunção, Charles Duca and Jerry Penha

Cytogenetic analysis of Astyanax laticeps (Cope, 1894) (Ostariophysi: Characidae) from the laguna dos Patos system

Renata da Rosa, Marceléia Rubert, Luiz R. Malabarba, Isabel Cristina Martins-Santos and Lucia Giuliano-Caetano

Cytogenetic characterization of Rhomboplites aurorubens and Ocyurus chrysurus, two monotypic genera of Lutjaninae from Cubagua Island, Venezuela, with a review of the cytogenetics of Lutjanidae (Teleostei: Perciformes)

Mauro Nirchio, Claudio Oliveira, Daniela C. Ferreira, Rodolfo Rondón, Julio E. Pérez, Anne Kathrin Hett, Anna Rita Rossi and Luciana Sola

Genetic variability in three species of Gymnotus Linnaeus, 1758 (Gymnotiformes: Gymnotidae) from Caracu stream of the upper Paraná River basin, Brazil

Judy Ruiz Rezende, Erasmo Renesto and Cláudio Henrique Zawadzki

How does diet influence the reproductive seasonality of tropical freshwater fish? A case study of a characin in a tropical mountain river

Tania M. Ballesteros, Mauricio Torres-Mejia and Martha P. Ramírez-Pinilla

Individual contributions to pooled-milt fertilizations of silver catfish Rhamdia quelen

Josiane Ribolli and Evoy Zaniboni-Filho

Induced spawning of the endangered Neotropical species Steindachneridion parahybae (Siluriformes: Pimelodidae)

Danilo Caneppele, Renato M. Honji, Alexandre W. S. Hilsdorf and Renata G. Moreira

Jupiaba citrina, a new species from rio Aripuanã, rio Madeira basin, Amazonas and Mato Grosso States, Brazil (Characiformes: Characidae)

Angela M. Zanata and Willian M. Ohara

Mercury distribution in different tissues and trophic levels of fish from a tropical reservoir, Brazil

Daniele Kasper, Elisabete Fernandes Albuquerque Palermo, Ana Carolina Monteiro Iozzi Dias, Gustavo Luiz Ferreira, Rafael Pereira Leitão, Christina Wyss Castelo Branco and Olaf Malm

NTPDase and acetylcholinesterase activities in silver catfish, Rhamdia quelen (Quoy & Gaimard, 1824) (Heptapteridae) exposed to interaction of oxygen and ammonia levels

Rosilene Rodrigues Kaizer, Vania Lúcia Loro, Maria Rosa Chitolina Schetinger, Vera Maria Morsch, Luciane Almeri Tabaldi, Cíntia Saydelles da Rosa, Luciano de Oliveira Garcia, Alexssandro G. Becker and Bernardo Baldisserotto

Phenotypic plasticity in fish life-history traits in two neotropical reservoirs: Petit-Saut Reservoir in French Guiana and Brokopondo Reservoir in Suriname

Bernard de Mérona, Jan Mol, Régis Vigouroux and Paulo de Tarso Chaves

Population genetic structuring in pacu (Piaractus mesopotamicus) across the Paraná-Paraguay basin: evidence from microsatellites

Daniela Calcagnotto and Rob DeSalle

Reproductive biology of the Neotropical electric fish Brachyhypopomus draco (Teleostei: Hypopomidae) from southern Brazil

Andrea B. Schaan, Júlia Giora and Clarice B. Fialho

Reproductive biology of the peacock bass Cichla piquiti (Perciformes: Cichlidae), an exotic species in a Neotropical reservoir

Augusto B. C. Vieira, Luiz F. Salvador-Jr., Rafael M. C. Melo, Gilmar B. Santos and Nilo Bazzoli

The ichthyofauna of upper rio Capivari: defining conservation strategies based on the composition and distribution of fish species

Paulo dos Santos Pompeu, Liana Sisi dos Reis, Cíntia Veloso Gandini, Rafael Couto Rosa de Souza and Jana Menegassi del Favero