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DESCRIÇÃO DOS OTÓLITOS DE TUCUNARÉS (Cichla sp. e Cichla monoculus) NO RESERVATÓRIO DA HIDRELÉTRICA DE VOLTA GRANDE (SP–MG) DESCRIPTION OF THE OTOLITHS OF PEACOCK BASS (CICHLA SP. AND CICHLA MONOCULUS) IN THE RESERVOIR OF VOLTA GRANDE DAM (SP–MG).

By Francisco Manoel de Souza Braga and Leandro Muller Gomiero

Abstract

Objetivou-se, neste trabalho, caracterizar as sagittae de Cichla sp. e Cichla monoculus introduzidas no reservatório da Hidrelétrica de Volta Grande, assim como as relações de seu comprimento e largura com os comprimentos totais dos peixes. Foram realizadas coletas bimestrais nos períodos de abril e junho de 1997 e mensais, de setembro de 1997 até agosto de 1998. As medidas morfológicas de comprimento e largura dos otólitos e as relações destes com os comprimentos totais dos peixes, assim como as diferenças da sagitta entre as duas espécies foram apresentadas. Os otólitos de Cichla monoculu,s quando comparados com os de Cichla sp,. apresentaram crenulações mais evidentes e maiores larguras, levando-se em conta os mesmos comprimentos totais.
 PALAVRAS-CHAVE: Otólito, Rio Grande, tucunaré azul (Cichla sp), tucunaré amarelo (Cichla monoculs), sagitta. The purpose of this study was to characterize the sagittae of Cichla sp. and Cichla monoculus introduced into the Volta Grande hydroelectric dam, as well as the relation of their length and width with their total length. Specimens were collect bimonthly in April and June 1997 and monthly from September 1997 to August 1998. The morphological measurements of length and width of the otoliths and their relation to the fishes’ total length, as well as the differences between the sagittae of the two species, are presented and discussed. The otoliths of Cichla monoculus exhibited more evident and wider crenulations than those of Cichla sp., taking into account the same total lengths. 
 KEY WORDS: Cichla, otolith, peacock bass, rio Grande, sagitt

Topics: Animal culture, SF1-1100, Agriculture, S, DOAJ:Animal Sciences, DOAJ:Agriculture and Food Sciences
Publisher: Universidade Federal de Goiás
Year: 2007
OAI identifier: oai:doaj.org/article:9021802f378746488cd31a3b5a4cce29
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