TESTICULAR MATURATION IN MALES OF THE MANJUBA Curimatella lepidura Eigenmann & Eigemnmann, 1889 (PISCES, CURIMATIDAE) OF THE DAM TRÊS MARIAS, RIVER SÃO FRANCISCO, MG.
DOI:
https://doi.org/10.5216/cab.v11i1.2529Keywords:
fish, reproductionAbstract
The aim of this study was to evaluate the testicular maturation in the manjuba Curimatella lepidura. For that, 318 males were collected from the Tres Marias Reservoir, Minas Gerais State, Brazil. These animals were sacrificed, and submitted to biometric routine, viscera were colleted and weighed, and then the data of gonadosomatic index (GSI) and condition factor (K) were obtained. The identification of maturation stages was evaluated by means of gonadal histology. The testicular morphology revealed to be similar to the majority of the Characiforms, and the gonadal activity was cyclical with period of evident resting. The GSI data presented an evident cyclical variation, with minimum in the stage 1 and maximum in the stage 2C/3 stage (2.5 ± 0.8). On the other hand, the data of condition factor did not presented an evident cyclical variation, indicating that this parameter is not a good reproductive indicator. The spermiation occurs from December to March.
KEY WORDS: Gonadal maturation, reproduction, Três Marias reservoir, testicles.
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